US20140310964A1 - Portable Band Saw - Google Patents
Portable Band Saw Download PDFInfo
- Publication number
- US20140310964A1 US20140310964A1 US14/319,922 US201414319922A US2014310964A1 US 20140310964 A1 US20140310964 A1 US 20140310964A1 US 201414319922 A US201414319922 A US 201414319922A US 2014310964 A1 US2014310964 A1 US 2014310964A1
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- US
- United States
- Prior art keywords
- band saw
- housing
- field case
- bore
- coupled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D53/00—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting
- B23D53/12—Hand-held or hand-operated sawing devices working with strap saw blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/849—With signal, scale, or indicator
- Y10T83/853—Indicates tool position
Definitions
- the present disclosure relates to various improvements to a portable band saw.
- portable hand-held band saws provide the tradesperson with an efficient yet portable means for cutting work pieces, these tools can be improved by improving their maintenance and damage prevention, increasing their functionality, reducing their weight and improving the accuracy of a cut made by the band saw.
- a portable band saw includes a serviceable/replaceable bumper system for allowing the band saw to be easily repaired if damaged from being dropped.
- the bumper system includes a rigid shroud removably mounted to the band saw and an elastomeric bumper mounted to said rigid shroud.
- An auxiliary handle is adjustably mounted to the band saw and is releasable from its position if subjected to a large force so as to avoid damage to the handle and tool housing.
- the front section of the band saw includes at least one bore receiving a spring biased insert having at least one of a detent and a protrusion for engaging the other of a detent and a protrusion on the handle.
- the spring biased insert allows the handle to disengage from the insert when subjected to a large force, such as by being dropped.
- An adjustable guide shoe is provided that includes a toolless adjustment mechanism to allow the position of the guide shoe to be easily adjusted.
- the front and rear section of the band saw are disposed on opposite sides of a polymeric field case. Compression rods are used to isolate compression forces from the polymeric field case.
- An electric box assembly including a plastic component box is disposed between the field case and a front section of the band saw.
- the plastic component box can house a control module and a light power supply.
- One or more routing cavities can extend from the component box and provide a covering for a wire of a wire harness connected to said control module.
- a light emitting diode can be mounted to a routing cavity of the component box and can be aligned with the band saw blade to cast a shadow along the cut line.
- a crash guard is mounted adjacent to the field case for protecting the filed case from damage.
- the crash guard can include a sight guide along an edge thereof and a rear blade guard formed integrally therewith for shielding the user from the return blade.
- FIG. 1 is a perspective view of a portable band saw according to the principles of the present disclosure
- FIG. 2 is an exploded perspective view of the portable band saw shown in FIG. 1 ;
- FIG. 3 is a perspective view of the portable band saw shown in FIG. 1 with the auxiliary handle shown in exploded view;
- FIG. 4 is a perspective view of the portable band saw shown in FIG. 3 illustrating the assembly of the auxiliary handle;
- FIG. 5 is a perspective view of the portable band saw shown in FIG. 4 with the auxiliary handle shown removed to illustrate the spring biased inserts.
- FIG. 6 is a perspective view of the auxiliary handle
- FIG. 7 is a side plan view of the portable band saw showing the auxiliary handle in a forward position
- FIG. 8 is a side plan view of the portable band saw showing the auxiliary handle in a upright position
- FIG. 9 is a side plan view of the portable band saw showing the auxiliary handle in an angled position
- FIG. 10 is a perspective view of the portable band saw shown in FIG. 1 with the front and rear bumpers shown in exploded view;
- FIG. 11 is an exploded perspective view of the front shroud and bumper assembly
- FIG. 12 is an exploded perspective view of the bumper assembly
- FIG. 13 is an exploded perspective view of the rear bumper assembly
- FIG. 14 is a perspective view of the portable band saw with the field case removed to illustrate the compression rods and tension bolts of the present disclosure
- FIG. 15 is a partially exploded view of the portable band saw illustrating the electric box assembly of the present disclosure
- FIG. 16 is plan view of the wire harness according to the principles of the present disclosure.
- FIG. 17 is a perspective view of the electric box assembly of the present disclosure.
- FIG. 18 is an exploded perspective view of the electric box assembly of the present disclosure.
- FIG. 19 is perspective view of a rear of the portable band saw according to the principles of the present disclosure.
- FIG. 20 is a perspective view of the portable band saw shown in FIG. 1 with the adjustable shoe shown in exploded view;
- FIG. 21 is a perspective view of the shoe body
- FIG. 22 is partial cut away view illustrating the adjustable shoe according to the principles of the present disclosure.
- FIG. 23 is a perspective view of the crash guard mounted to the field case according to the principles of the present disclosure.
- FIG. 24 is an exploded perspective view of the crash guard and field case according to the principles of the present disclosure.
- FIG. 25 is a rear perspective view of the crash guard mounted to the field case and receiving the blade in a rear blade guard portion according to the principles of the present disclosure
- FIG. 26 is top view of the field case illustrating the sight guide according to the principles of the present disclosure.
- FIG. 27 is a perspective view of a portable band saw illustrating the light system according to the principles of the present disclosure
- FIG. 28 is perspective view of the light assembly according to the principles of the present disclosure.
- FIG. 29 is an exploded perspective view of the light assembly according to the principles of the present disclosure.
- the portable band saw 10 can be used to cut through various metal, metal alloy and/or polymeric work-pieces.
- the portable band saw 10 can include a housing 12 , a power system 14 , a saw blade system 16 and a lighting system 18 .
- the housing 12 can enclose and/or support each of the power system 14 , the saw blade system 16 and the lighting system 18 .
- the power system 14 can power the saw blade system 16 , such that the saw blade system 16 can cut through the desired structure.
- the lighting system 18 can illuminate a work surface associated with the cutting operation of the saw blade system 16 to facilitate the operation of the portable band saw 10 .
- the housing 12 can include a first or front section 20 and a second or rear section 22 , which can be joined together by a field case 21 , one or more compression rods 24 and at least one tension screw/bolt 26 .
- the front section 20 and the rear section 22 of the housing 12 can be substantially similar to a housing associated with a commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., the front section 20 and the rear section 22 will not be discussed in great detail herein.
- the front section 20 and rear section 22 can be composed of a metal or metal alloy material, and can comprise cast aluminum alloy or magnesium alloy, for example.
- the front section 20 can include a first or auxiliary handle 28
- the rear section 22 can include a second or trigger handle 30 .
- Each of the front section 20 and the rear section 22 can include a bumper system 32 .
- the auxiliary handle 28 can provide additional stability for the user of the portable band saw 10 , and can be indexed at multiple angles to enable the user to select a comfortable position for the operation of the portable band saw 10 , which can improve the ease of use of the portable band saw 10 .
- the auxiliary handle 28 can be coupled to the front section 20 of the housing 12 and can pivot or rotate relative to the housing 12 .
- the auxiliary handle 28 can include a knob 34 ( FIGS. 3 and 4 ), a washer 36 ( FIG. 4 ), a first insert 38 ( FIGS. 3 and 5 ), a second insert 40 ( FIGS. 3 and 5 ), a handle body 42 ( FIGS. 3 , 4 and 6 ) and a carriage bolt 44 ( FIGS. 3 and 4 ).
- the knob 34 can comprise any suitable graspable portion that can enable a user to easily rotate the knob 34 in a clockwise or counterclockwise direction while the user is holding the trigger handle 30 .
- the knob 34 can be rotated relative to the housing 12 in a clockwise direction to secure the auxiliary handle 28 to the housing 12 , and can be rotated in a counterclockwise direction to release the auxiliary handle 28 from the housing 12 .
- the knob 34 can include a bore 34 a.
- the bore 34 a can include threads, which can threadably engage mating threads 44 a on the carriage bolt 44 .
- the rotation of the knob 34 relative to the housing 12 can move the knob 34 along the threads 44 a of the carriage bolt 44 to either tighten or lock the auxiliary handle 28 on the housing 12 , or to release or loosen the auxiliary handle 28 relative to the housing 12 , and thus, enable the auxiliary handle 28 to be pivoted or indexed relative to the housing 12 .
- the washer 36 can be positioned between the knob 34 and the first insert 38 to distribute the tightening or compressive force from the knob 34 over a surface of the first insert 38 .
- the first insert 38 can be coupled to a first bore 46 formed in the housing 12
- the second insert 40 can be coupled to a second bore 48 formed in the housing 12 .
- first bore 46 and second bore 48 are identified as separate bores, the first bore 46 and second bore 48 could comprise a single bore formed through the housing 12 .
- the first bore 46 can be formed opposite the second bore 48 .
- the first insert 38 and second insert 40 can be coupled to the first bore 46 and second bore 48 through any suitable fastening technique, such as through the use of mechanical fasteners, a press-fit, a snap fit, welding and the like.
- the inserts 38 , 40 can be provided with flats that orient the inserts within the 46 , 48 and springs 41 ( FIG. 5 ) can be disposed within the bores 46 , 48 to bias the inserts toward the handle 42 .
- the first insert 38 and second insert 40 can be composed of a resilient material, which can comprise a metal, metal alloy, polymer or combinations thereof.
- the first insert 38 and second insert 40 can be composed of a metal or metal alloy and a polymer can be overmolded onto the metal or metal alloy, if desired.
- the first insert 38 and second insert 40 can each include multiple detents 38 a, 40 a, which can engage protrusions 42 a formed on the handle body 42 ( FIG. 3 ).
- the multiple detents 38 a, 40 a can enable the handle body 42 to be pivoted or indexed and secured to the housing 12 in a variety of positions.
- the springs 41 allow the inserts 38 , 40 to be retracted out of engagement with the protrusions 42 a of the handle body when the handle 42 is subjected to a large force, such as by being dropped. The ability of the handle to move when subject to a large force, protects the handle 42 and housing from being damaged if dropped.
- the handle body 42 can be generally U-shaped, and can include the protrusions 42 a.
- the protrusions 42 a can be formed on opposite annular projections 50 .
- the protrusions 42 a can be sized to engage the detents 38 a, 40 a to enable the handle body 42 to be secured or coupled to the housing 12 in any desired position.
- the handle body 42 can be angled or indexed relative to the housing 12 in any position from about zero degrees ( FIG. 7 ) to about ninety degrees ( FIG. 8 ).
- the handle body 42 can be coupled to the housing 12 at about forty-five degrees.
- the annular projections 50 can include throughbores 52 .
- the throughbores 52 can slideably engage the carriage bolt 44 to enable the handle body 42 to rotate or pivot about the carriage bolt 44 when the knob 34 is rotated accordingly, as shown in FIGS. 3 and 4 .
- the carriage bolt 44 can include the threads 44 a and a head 44 b.
- the threads 44 a can engage the bore 34 a of the knob 34 to enable the handle body 42 to be secured to or released from the housing 12 .
- the head 44 b can be sized such that the head 44 b can apply a compressive force against one of the annular projections 50 of the handle body 42 when the auxiliary handle 28 is coupled to the housing 12 , as shown best in FIGS. 7-9 .
- the trigger handle 30 can be coupled to the rear portion 22 of the housing 12 .
- the trigger handle 30 can be substantially similar to a trigger handle associated with the commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., the trigger handle 30 will not be discussed in great detail herein. Briefly, however, the trigger handle 30 can enable the user to activate or deactivate the portable band saw 10 , and can enable the user to guide the portable band saw 10 over a work-piece.
- the housing 12 can include the bumper system 32 , as shown in FIG. 1 .
- the bumper system 32 can be coupled to the front section 20 and the rear section 22 .
- the bumper system 32 can protect the portable band saw 10 from inadvertent falls from various heights. Further, the bumper system 32 can be easily replaceable such that the user of the portable band saw 10 can replace the bumper system 32 himself or herself at a job site, without requiring the user to take the portable band saw 10 to a service station.
- the bumper system 32 can generally be configured to absorb a significant shock load, which can thereby prevent damage to the housing 12 . By preventing damage to the housing 12 , the portable band saw 10 may remain operable after a significant fall.
- the bumper system 32 can include a front bumper 54 that can be coupled to the front section 20 , and a rear bumper 56 that can be coupled to the rear section 22 .
- the front bumper 54 can include a shroud 54 a and a bumper 54 b.
- the shroud 54 a can be shaped to conform to a shape of the front section 20 , and can include a first or top surface 60 , a second or side surface 62 and one or more coupling features 64 .
- the shroud 54 a can be a monolithic member, but could also comprise one or more members to enable partial replacement of the front bumper 54 , if desired.
- the shroud 54 a can be composed of any suitable high strength material, such as a metal, metal alloy or polymer, and for example, steel.
- the shroud 54 a can be coupled to the front section 20 , via any suitable mechanical fastening technique, such as through a snap-fit or the use of mechanical fasteners, for example, rivets, bolts, screws, etc.
- the top surface 60 can protect a top surface 20 a of the front section 20
- the side surface 62 can protect an annular area 20 b below the top surface 20 a of the front section 20 .
- the coupling features 64 can couple the top surface 60 of the shroud 54 a to the top surface 20 a of the front section 20 , and can couple the side surface 62 to the annular area 20 b.
- the coupling features 64 can comprise apertures, however, it will be understood that the coupling features 64 can comprise any desired feature to attach the shroud 54 a to the housing 12 , such as mating projections.
- the bumper 54 b can be shaped to conform to a shape of the side surface 62 of the shroud 54 a, and as best shown in FIG. 12 , can include an insert 66 , a polymeric member 68 and one or more coupling features 70 .
- the bumper 54 b can be a monolithic member, but could also comprise one or more members to enable partial replacement of the front bumper 54 , if desired.
- the insert 66 can be composed of any suitable high strength material, for example, a metal, metal alloy or polymer, such as steel.
- the insert 66 can provide the bumper 54 b with added rigidity.
- the insert 66 can be disposed adjacent to the side surface 62 of the shroud 54 a when the bumper 54 b is coupled to the shroud 54 a.
- the polymeric member 68 can be coupled adjacent to a surface 66 a of the insert 66 .
- the polymeric member 68 can be coupled to the insert 66 through any suitable technique, such as by overmolding the polymeric member 68 onto the insert 66 , or by insert molding the insert 66 within the polymeric member 68 .
- the polymeric member 68 can be composed of any suitable shock absorbing material, for example, rubber.
- the coupling features 70 can couple the bumper 54 b to the shroud 54 a.
- the bumper 54 b can be coupled to the shroud 54 a, via any suitable mechanical fastening technique, such as through a snap-fit or the use of mechanical fasteners, for example, rivets, bolts, screws, etc.
- the coupling features 70 can comprise apertures that extend through both the insert 66 and the polymeric member 68 , however, it will be understood that the coupling features 70 can comprise any desired feature to attach the bumper 54 b to the housing 12 , such as mating projections.
- the rear bumper 56 can be coupled to the rear section 22 of the housing 12 .
- the rear bumper 56 can be coupled to a side 22 a of the rear section 22 , to protect an annular area surrounding a top surface 22 b of the rear section 22 .
- the rear bumper 56 can be annular, however, the rear bumper 56 can be shaped as desired to conform to the shape of the rear section 22 .
- the rear bumper 56 can be a monolithic member, but could also comprise one or more members to enable partial replacement of the rear bumper 56 , if desired.
- the rear bumper 56 can include an insert 72 , a polymeric member 74 and one or more coupling features 76 .
- the insert 72 can be composed of any suitable high strength material, for example, a metal, metal alloy or polymer, such as steel.
- the insert 72 can provide the rear bumper 56 with added rigidity.
- the insert 72 can be disposed adjacent to the side 22 a of the rear section 22 when the rear bumper 56 is coupled to the rear section 22 .
- the polymeric member 74 can be coupled adjacent to a surface 72 a of the insert 72 .
- the polymeric member 74 can be coupled to the insert 72 through any suitable technique, such as by overmolding the polymeric member 74 onto the insert 72 , or by insert molding the insert 72 within the polymeric member 74 .
- the polymeric member 74 can be composed of any suitable shock absorbing material, for example, rubber.
- the coupling features 76 can couple the rear bumper 56 to the rear section 22 .
- the rear bumper 56 can be coupled to the rear section 22 , via any suitable mechanical fastening technique, such as through a snap-fit or the use of mechanical fasteners, for example, rivets, bolts, screws, etc. If mechanical fasteners are employed to couple the rear bumper 56 to the housing 12 , then the coupling features 76 can comprise apertures that extend through both the insert 72 and the polymeric member 74 , however, it will be understood that the coupling features 76 can comprise any desired feature to attach the rear bumper 56 to the housing 12 , such as mating projections.
- the field case 21 can be coupled between the front section 20 and the rear section 22 of the housing 12 .
- the field case 21 can be composed of a polymeric material, and can house at least a portion of the power system 14 .
- the field case 21 can include a first bore 21 a, a second bore 21 b and a third bore 21 c.
- the first bore 21 a, the second bore 21 b and the third bore 21 c can extend at least partially through the field case 21 .
- the first bore 21 a and the second bore 21 b can be formed in the field case 21 such that a center area of the first bore 21 a and second bore 21 b can be devoid of the field case 21 to enable a portion of the saw blade system 16 to be coupled to the field case 21 , via the compression rods 24 , as will be discussed.
- the first bore 21 a and the second bore 21 b can be disposed at one side of the field case 21 and can be sized to receive the compression rods 24 .
- the third bore 21 c can pass through a side of the field case 21 opposite the first bore 21 a and second bore 21 b.
- the third bore 21 c can be sized to receive the tension screw/bolt 26 .
- the compression rods 24 can be coupled between the front section 20 and the rear section 22 .
- a first compression rod 24 a can be received in the first bore 21 a
- a second compression rod 24 b can be received in the second bore 21 b of the field case 21 , as shown in FIG. 14 .
- the front section 20 and the rear section 22 can retain the compression rods 24 within the field case 21 .
- the compression rods 24 can receive a compression load C that can be generally inherent in the portable band saw 10 , and thus, the compression rods 24 can relieve the field case 21 from the compression load C, which can remove the compliant nature associated with the field case 21 being composed of a polymeric material.
- the compression rods 24 can also couple at least a portion of the saw blade system 16 to the field case 21 , as will be discussed herein.
- the tension screw/bolt 26 can be received through the third bore 21 c of the field case 21 , and can extend from the front section 20 to the rear section 22 .
- the tension screw/bolt 26 can be threaded into a bore 80 defined in the rear section 22 , which can serve to retain the tension screw/bolt 26 within the bore 21 c.
- the tension screw/bolt 26 can receive a tension or tensile load T that can be generally inherent in the portable band saw 10 , and thus, the tension screw/bolt 26 can relieve the field case 21 from the tensile load T, which can remove the compliant nature associated with having the field case 21 composed of a polymeric material.
- the power system 14 can be encased by the housing 12 .
- the power system 14 can drive the saw blade system 16 to cut the work-piece.
- the power system 14 can include a trigger 100 , a motor 102 and a control system 104 via one or more wires 100 b (shown in FIG. 16 ).
- the trigger 100 and motor 102 can be substantially similar to a trigger and motor associated with a commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., the trigger 100 and motor 102 will not be discussed in great detail herein.
- the trigger 100 can include an actuator 100 a that can be in communication with the control system 104 .
- the actuator 100 a can protrude from the trigger handle 30 to enable a user to activate or deactivate the portable band saw 10 . Based on the input from the user, the actuator 100 a can transmit a signal to the control system 104 to activate the motor 102 .
- the motor 102 can be a DC motor, such as a brushless DC motor.
- the motor 102 can be housed in the field case 21 , and can be responsive to and in communication with the control system 104 .
- the motor 102 can also be coupled to the saw blade system 16 , via an output shaft, for example, to drive the saw blade system 16 .
- the control system 104 can provide the motor 102 with an appropriate current at an appropriate voltage phase angle to drive the saw blade system 16 .
- the control system 104 can be coupled to a first end 21 d of the field case 21 , adjacent to the motor 102 .
- the control system 104 can be operable to activate and deactivate the motor 102 based on the user input received from the trigger 100 .
- the control system 104 can include a component box 106 ( FIGS. 15 , 17 and 18 ), a controller 108 ( FIG. 18 ), a lighting power supply 110 ( FIG. 18 ) and a wiring harness 112 ( FIGS. 16-18 ).
- the component box 106 can be composed of a polymeric material, which can serve to electrically insulate the electrical components within the component box 106 from the metallic portions of the housing 12 , such as the front section 20 and the rear section 22 .
- the component box 106 can include apertures 114 , a component cavity 116 , a first routing cavity 118 , a second routing cavity 120 , and coupling members 122 .
- the apertures 114 can receive mechanical fasteners, such as screws, bolts, etc. to couple the component box 106 to the field case 21 .
- the component cavity 116 can be generally rectangular, and can have a depth sized to receive and retain the controller 108 and the lighting power supply 110 within the component box 106 , as shown in FIG. 17 .
- the first routing cavity 118 and second routing cavity 120 can be sized to enable wires from the wiring harness 112 to be routed away from the metallic portions of the housing 12 .
- the coupling members 122 can retain the controller 108 and the lighting power supply 110 within the component box 106 .
- the coupling members 122 can comprise flexible arms to enable the controller 108 and the lighting power supply 110 to be inserted into the component box 106 .
- the controller 108 can be in communication with and responsive to the trigger 100 and the motor 102 to enable the operation of the portable band saw 10 , as will be discussed.
- the controller 108 can also be in communication with and responsive to the lighting system 18 to activate or deactivate the lighting system 18 , as will also be discussed herein.
- the term controller refers to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that execute one or more software or firmware programs, a combinational logic circuit, or other suitable components that provide the described functionality.
- ASIC application specific integrated circuit
- the controller 108 can be substantially similar to a controller associated with a commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., the controller 108 will not be discussed in great detail herein. Briefly, however, the controller 108 can provide a selected current at a selected voltage phase angle to the motor 102 from a field power source (not shown) based on the signal received from the actuator 100 a. The controller 108 can also provide current to the lighting system 18 from the lighting power supply 110 based on a signal received from the lighting system 18 , as will be discussed.
- the lighting power supply 110 can comprise any suitable power source capable of providing current to the lighting system 18 , such as a battery, capacitor, etc.
- the lighting power supply 110 can include members 110 a to couple the wiring harness 112 to the component box 106 .
- the wiring harness 112 can include apertures formed in a projection 112 a that can receive the members 110 a to couple the wiring harness 112 to the component box 106 .
- the wiring harness 112 can be press-fit onto the members 110 a.
- the wiring harness 112 can include one or more controller connections 124 , a lighting connection 126 , a lighting power supply connection 128 and a feedback coil 130 .
- the controller connections 124 , the lighting connection 126 , the lighting power supply connection 128 and the feedback coil 130 can be overmolded with a polymeric material to form the wiring harness 112 .
- the controller connections 124 , the lighting connection 126 and the lighting power supply connection 128 can be similar to the connections employed with the commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., the controller connections 124 , the lighting connection 126 and the lighting power supply connection 128 will not be discussed in great detail herein.
- the feedback coil 130 can be disposed within a center 132 of the overmolded wiring harness 112 , which can be adjacent to the motor 102 when the component box 106 is coupled to the field case 21 .
- the feedback coil 130 can sense the magnetic field generated by the motor 102 , and can communicate this information to the controller 108 via an appropriate one of the controller connections 124 . Based on the signal from the feedback coil 130 , the controller 108 can increase or decrease the speed of the motor 102 .
- the feedback coil 130 can remain in the same position during the use of the portable band saw 10 , which can improve the accuracy of the signal received from the feedback coil 130 .
- the saw blade system 16 can be driven by the motor 102 of the power system 14 .
- the saw blade system 16 can include a blade 200 , one or more pulleys 202 , a shoe 204 , a crash plate system 206 and a sight guide 208 .
- the blade 200 can comprise a conventional band saw blade, such as a Bi-Metal Portable Band Saw Blade, model DW3891, commercially available from DeWALT Industrial Tool Co. of Baltimore, Md.
- the pulleys 202 can be substantially similar to pulleys associated with the commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., and thus, the pulleys 202 will not be discussed in great detail herein. Briefly, however, one of the pulleys 202 can be coupled to the motor 102 to drive the blade 200 around the housing 12 .
- the shoe 204 can be positioned adjacent to the work-piece to support the work-piece during the operation of the portable band saw 10 .
- the shoe 204 can be configured to enable the user of the portable band saw 10 to adjust a position of the shoe 204 relative to the work-piece without requiring tools.
- the shoe 204 can include a shoe body 210 , a block 212 , a stud 214 and a lever 216 .
- the shoe body 210 can define a first end 218 , a second end 220 , a first or front side 222 and a second or rear side 224 .
- the first end 218 can include one or more apertures 226 and a blade passage 228 .
- the apertures 226 can be sized to receive one or more mechanical fasteners 226 a, such as screws, bolts, etc., to couple the shoe body 210 to the block 212 .
- the blade passage 228 can enable the blade 200 to pass through the shoe body 210 .
- the second end 220 of the shoe body 210 can be positioned adjacent to the work-piece when the shoe 204 is coupled to the housing 12 .
- the front side 222 can face the front section 20 when the shoe 204 is coupled to the rear section 22 .
- the rear side 224 can be opposite the front side 222 , and thus, can be adjacent to the rear section 22 when the shoe 204 is coupled to the rear section 22 .
- the rear side 224 can also include a lip 224 a ( FIG. 21 ). The lip 224 a can cooperate with the block 212 to couple or clamp the shoe body 210 to the rear section 22 of the housing 12 .
- the block 212 can be coupled to the shoe body 210 via the mechanical fasteners 226 a.
- the block 212 can include a projection 230 , a clamping surface 232 and mating features 234 .
- the projection 230 can be generally elliptical, and can be sized to slide within a slot 236 formed in the rear section 22 of the housing 12 .
- the block 212 can cooperate with the slot 236 to enable the shoe body 210 to be positioned and secured in any desired position along a length of the slot 236 .
- the slot 236 can comprise a T-slot to enable only the projection 230 of the block 212 to be received in and slide within the slot 236 . As shown in FIG.
- the projection 230 can define apertures 230 a for receipt of the mechanical fasteners 226 a to couple the block 212 to the shoe body 210 , and thus, the apertures 230 a can be threaded, if necessary, to mate with the mechanical fasteners 226 a.
- the clamping surface 232 can cooperate with the lip 224 a to couple or clamp the shoe 204 to the rear section 22 of the housing 12 .
- the rear section 22 of the housing 12 can include a rail 238 adjacent to the slot 236 ( FIG. 22 ).
- the lip 224 a can abut against a first side of the rail 238 and the clamping surface 232 can abut against a second side of the rail 238 to clamp the shoe 204 to the housing 12 .
- the clamping surface 232 can include a taper 232 a. The taper 232 a can enable the block 212 to be forced tightly against the rail 238 to firmly clamp the shoe body 210 to the housing 12 .
- the mating features 234 can be defined on a surface opposite the clamping surface 232 .
- the mating features 234 can include any feature capable of engaging the stud 214 in a variety of positions, such as ridges, angled projections, detents, etc.
- the mating features 234 can engage the stud 214 such that a force applied to the stud 214 , via the lever 216 , can be applied to the block 212 to clamp the shoe 204 to the housing 12 .
- the mating features 234 can cooperate with the stud 214 to lock or secure the shoe 204 in a desired vertical position relative to the housing 12 .
- the stud 214 can include a first end 240 and a second end 242 .
- the first end 240 of the stud 214 can include at least one mating feature 240 a.
- the mating feature 240 a can be configured to engage the mating features 234 on the block 212 to transmit a torque from the lever 216 to the block 212 to clamp the shoe 204 to the housing 12 .
- the mating features 234 of the block 212 comprise angled projections
- the mating feature 240 a of the stud 214 can comprise a valley.
- the second end 242 of the stud 214 can be configured to couple the lever 216 to the stud 214 , and thus, the second end 242 can define a bore that can be threaded, keyed, notched, etc. to couple the lever 216 to the stud 214 .
- the lever 216 can include a first end 216 a that can couple the lever 216 to the stud 214 , and a second end 216 b that can receive an input from the user of the portable band saw 10 .
- the first end 216 a can be configured to mate within the bore 242 a of the second end 242 of the stud 214 , and thus, the first end 216 a can be threaded, keyed, notched, etc. to fixedly couple the lever 216 to the stud 214 .
- the stud 214 and lever 216 are described herein as being discrete elements, the stud 214 and lever 216 could also be integrally formed.
- the second end 216 b of the lever 216 can be sized such that the user can easily grasp the lever 216 to rotate the lever 216 clockwise or counterclockwise relative to the housing 12 .
- the lever 216 can be rotated clockwise to apply the torque to the block 212 , via the stud 214 , to clamp the shoe 204 in a desired position relative to the housing 12 .
- the lever 216 can be rotated counterclockwise to release the torque from the block 212 , by disengaging the mating features 234 of the block 212 from the mating feature 240 a of the stud 214 , to enable the projection 230 of the block 212 to be slid into a desired position within the slot 236 .
- the lever 216 can enable tool-less adjustment of the shoe 204 relative to the housing 12 , which can enable quick adjustments of the shoe 204 on a job site.
- the saw blade system 16 can also include the crash plate system 206 .
- the crash plate system 206 can protect a bottom 250 of the field case 21 from damage that may be caused by the portable band saw 10 contacting the work-piece after the cutting operation due to the inherent follow through motion of the portable band saw 10 .
- the crash plate system 206 can include a crash plate 252 and a blade guard 254 .
- the crash plate 252 and blade guard 254 can be discrete members, or can be integrally formed into a monolithic member.
- the crash plate 252 and blade guard 254 can be composed of any suitable high strength material, such as a metal, metal alloy or resilient polymer.
- the crash plate 252 can protect the field case 21 from damage, while the blade guard 254 can protect the user from a rear section 200 a of the blade 200 ( FIG. 25 ).
- the crash plate 252 can be configured to mate with the bottom 250 of the field case 21 , and for example, can be generally concave in shape. As shown in FIG. 24 , the crash plate 252 can also be sized to fit in the void defined between the first bore 21 a and second bore 21 b of the field case 21 , so that the compression rods 24 a, 24 b can be used to couple the crash plate 252 to the field case 21 . It will be understood that any suitable technique could be used to couple the crash plate 252 to the field case 21 , such as welding, adhesives, mechanical fasteners, etc.
- the crash plate 252 can include a top surface 256 , a rear surface 258 , a first side 260 , a second side 262 and throughbores 264 .
- the top surface 256 can be positioned adjacent to the field case 21 , and can be generally smooth to mate with a generally smooth exterior of the field case 21 .
- the rear surface 258 can be opposite the top surface 256 , and can include one or more crush ribs 258 a.
- the crush ribs 258 a can absorb and distribute forces incurred when the portable band saw 10 inadvertently contacts the work-piece.
- the first side 260 can be coupled to the sight guide 208 , and the second side 262 can be coupled to the blade guard 254 .
- the throughbores 264 can be sized to slideably receive the compression rods 24 therethrough to couple the crash plate 252 to the field case 21 ( FIG. 23 ).
- the blade guard 254 can be coupled to or formed on the second side 262 of the crash plate 252 .
- the blade guard 254 can protect or guard the user from the rear portion 200 a of the blade 200 ( FIG. 25 ), and can also shield the blade 200 from debris or objects adjacent to the work-piece.
- the blade guard 254 can define a passage 254 a.
- the passage 254 a can be sized to enable the blade 200 to pass therethrough, and can generally have a depth configured such that a majority of the blade 200 is disposed within the passage 254 a.
- the sight guide 208 can be coupled to the first side 260 of the crash plate 252 ( FIG. 24 ).
- the sight guide 208 can be coupled to the first side 260 such that the sight guide 208 can extend substantially an entire length of the first side 260 of the crash plate 252 .
- the sight guide 208 can be comprised of any suitable material, such as a metal, metal alloy or polymer, that can be coated with a color, which contrasts with the field case 21 , such as red, to enable the user to easily view the sight guide 208 .
- the sight guide 208 can be coupled to the crash plate 252 via any suitable technique, such as molding, adhesives, mechanical fasteners, etc.
- the sight guide 208 can comprise a polymeric material that can be adhesively coupled to the crash plate 252 , or the sight guide 208 can comprise a polymeric coating, such as paint, that can be applied to the first side 260 of the crash plate 252 .
- the sight guide 208 can assist the user in predicting the cutting plane of the blade 200 , without reducing or altering the blade 200 .
- the user can align the sight guide 208 with a line or scribe on the work-piece and maintain this alignment throughout the cutting operation, which can assist the user in producing accurate cuts.
- the lighting system 18 can illuminate the work-piece, generally in an area adjacent to and encompassing the desired cutting area or cutting path through the work-piece.
- the lighting system 18 can be housed within the component box 106 of the control system 104 on the front section 20 of the housing 12 .
- the lighting system 18 can include a light source 300 ( FIG. 29 ), a printed circuit board (PCB) 302 ( FIG. 29 ), a baffle 304 ( FIGS. 28 and 29 ), a housing 306 ( FIGS. 28 and 29 ) and a switch 308 ( FIG. 27 ).
- the light source 300 can comprise any suitable light emitting device, such a light emitting diode (LED), organic light emitting diode (OLED), etc. If a LED is employed as the light source 300 , the LED can comprise a one-half watt LED.
- the light source 300 can emit light rays R onto the work-piece to aid the user in the cutting operation.
- the light source 300 can be coupled to the PCB 302 .
- the PCB 302 can be in communication with and responsive to the controller 104 , via a connector 302 a, to receive power or current from the lighting power supply 110 .
- the PCB 302 can include suitable circuitry to power the light source 300 with the power received from the lighting power supply 110 .
- the PCB 302 can activate the light source 300 to illuminate the work-piece.
- the baffle 304 can be positioned over the light source 300 and the PCB 302 .
- the baffle 304 can be generally annular, and can be sized to surround the light source 300 and the PCB 302 such that the PCB 302 is hidden from the view of the user.
- the baffle 304 can be composed of any suitable heat resistant material, such as a metal, metal alloy or polymer.
- the baffle 304 can include a bore 304 a, a shade 304 b and keys 304 c.
- the bore 304 a can be sized to enable the light source 300 and the PCB 302 to be retained within the baffle 304 .
- the shade 304 b can be generally V-shaped, and can cover at least a portion of the light source 300 .
- the shade 304 b can prevent the light rays from the light source 300 from shining in the user's eyes.
- the keys 304 c can ensure that the baffle 304 is properly inserted within the housing 306 , and that the baffle 304 does not rotate relative to the housing 306 .
- the housing 306 can couple the lighting system 18 to the component box 106 .
- the housing 306 can be composed of any suitable material, such as a metal, metal alloy or polymer, and can generally comprise a translucent polymer.
- the housing 306 can include a bore 306 a and at least one coupling feature 306 b.
- the bore 306 a can be configured to receive the baffle 304 , and can include mating keys 312 .
- the mating keys 312 can engage the keys 304 c of the baffle 304 , which can ensure that the baffle 304 is properly orientated and remains properly orientated within the housing 306 .
- the coupling feature 306 b can couple the housing 306 to the component box 106 .
- the coupling feature 306 b can comprise a bore for receipt of a mechanical fastener, such as a screw, bolt, etc. to couple the housing 306 to the component box 106 , as shown in FIG. 15 .
- the switch 308 can also be coupled to the component box 106 , and can be in communication with the controller 108 .
- the switch 308 can be coupled to the component box 106 such that the switch 308 can be easily manipulated by the user.
- the switch 308 can enable the user to activate or deactivate the light source 300 .
- the switch 308 can transmit a signal to the controller 108 , which can then transmit or cease transmitting power to the PCB 302 , effectively activating or deactivating the light source 300 .
- the light source 300 can be coupled to the PCB 302 , and that assembly can be inserted into the baffle 304 . Then, the baffle 304 can be inserted into the housing 306 , which can then be coupled to the component box 106 . The user can then manipulate the switch 308 to activate or deactivate the light source 300 .
- the lighting system 18 can be easily assembled and coupled to the portable band saw 10 to enable a user to selectively illuminate the work-piece, while not projecting light rays into the user's eyes.
Abstract
A portable band saw includes a serviceable/replaceable bumper system for allowing the band saw to be easily repaired if damaged from being dropped. An auxiliary handle is adjustably mounted to the band saw and is releasable from its position if subjected to a large force so as to avoid damage to the handle and tool housing. An adjustable guide shoe includes a toolless adjustment. The front and rear section of the band saw are disposed on opposite sides of a polymeric field case. Compression rods are used to isolate compression forces from the polymeric field case. An electric box assembly including a plastic component box is disposed between the field case and a front section of the band saw. A crash guard is mounted adjacent to the field case and includes a sight guide along an edge thereof and a rear blade guard formed integrally therewith.
Description
- This application claims the benefit of U.S. patent application Ser. No. 12/362,766 which claims the benefit of U.S. Provisional Application No. 61/025,217, filed on Jan. 31, 2008.
- The present disclosure relates to various improvements to a portable band saw.
- This section provides background information related to the present disclosure which is not necessarily prior art.
- Many tradespersons, such as pipe fitters, steam fitters and electricians, routinely cut metal workpieces such as pipes, tubes and conduit with portable hand-held power saws. In some applications, such as when the end of a pipe or conduit is to be threaded, it is highly desirable that the cut be perpendicular to the axis of the workpiece so that the maximum axial deviation or runout of the cut is less than about one-thirty second of an inch. When this degree of accuracy is needed, the tradesperson was typically forced to employ a free-standing cutoff saw or a portable hand-held band saw. Free-standing cutoff saws, however, are not typically practical due to issues with their cost and size, as well as the free-standing (i.e., non-portable) nature of the saw.
- Although portable hand-held band saws provide the tradesperson with an efficient yet portable means for cutting work pieces, these tools can be improved by improving their maintenance and damage prevention, increasing their functionality, reducing their weight and improving the accuracy of a cut made by the band saw.
- This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
- A portable band saw includes a serviceable/replaceable bumper system for allowing the band saw to be easily repaired if damaged from being dropped. The bumper system includes a rigid shroud removably mounted to the band saw and an elastomeric bumper mounted to said rigid shroud.
- An auxiliary handle is adjustably mounted to the band saw and is releasable from its position if subjected to a large force so as to avoid damage to the handle and tool housing. The front section of the band saw includes at least one bore receiving a spring biased insert having at least one of a detent and a protrusion for engaging the other of a detent and a protrusion on the handle. The spring biased insert allows the handle to disengage from the insert when subjected to a large force, such as by being dropped.
- An adjustable guide shoe is provided that includes a toolless adjustment mechanism to allow the position of the guide shoe to be easily adjusted.
- The front and rear section of the band saw are disposed on opposite sides of a polymeric field case. Compression rods are used to isolate compression forces from the polymeric field case.
- An electric box assembly including a plastic component box is disposed between the field case and a front section of the band saw. The plastic component box can house a control module and a light power supply. One or more routing cavities can extend from the component box and provide a covering for a wire of a wire harness connected to said control module. A light emitting diode can be mounted to a routing cavity of the component box and can be aligned with the band saw blade to cast a shadow along the cut line.
- A crash guard is mounted adjacent to the field case for protecting the filed case from damage. The crash guard can include a sight guide along an edge thereof and a rear blade guard formed integrally therewith for shielding the user from the return blade.
- Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
-
FIG. 1 is a perspective view of a portable band saw according to the principles of the present disclosure; -
FIG. 2 is an exploded perspective view of the portable band saw shown inFIG. 1 ; -
FIG. 3 is a perspective view of the portable band saw shown inFIG. 1 with the auxiliary handle shown in exploded view; -
FIG. 4 is a perspective view of the portable band saw shown inFIG. 3 illustrating the assembly of the auxiliary handle; -
FIG. 5 is a perspective view of the portable band saw shown inFIG. 4 with the auxiliary handle shown removed to illustrate the spring biased inserts. -
FIG. 6 is a perspective view of the auxiliary handle; -
FIG. 7 is a side plan view of the portable band saw showing the auxiliary handle in a forward position; -
FIG. 8 is a side plan view of the portable band saw showing the auxiliary handle in a upright position; -
FIG. 9 is a side plan view of the portable band saw showing the auxiliary handle in an angled position; -
FIG. 10 is a perspective view of the portable band saw shown inFIG. 1 with the front and rear bumpers shown in exploded view; -
FIG. 11 is an exploded perspective view of the front shroud and bumper assembly; -
FIG. 12 is an exploded perspective view of the bumper assembly; -
FIG. 13 is an exploded perspective view of the rear bumper assembly; -
FIG. 14 is a perspective view of the portable band saw with the field case removed to illustrate the compression rods and tension bolts of the present disclosure; -
FIG. 15 is a partially exploded view of the portable band saw illustrating the electric box assembly of the present disclosure; -
FIG. 16 is plan view of the wire harness according to the principles of the present disclosure; -
FIG. 17 is a perspective view of the electric box assembly of the present disclosure; -
FIG. 18 is an exploded perspective view of the electric box assembly of the present disclosure; -
FIG. 19 is perspective view of a rear of the portable band saw according to the principles of the present disclosure; -
FIG. 20 is a perspective view of the portable band saw shown inFIG. 1 with the adjustable shoe shown in exploded view; -
FIG. 21 is a perspective view of the shoe body; -
FIG. 22 is partial cut away view illustrating the adjustable shoe according to the principles of the present disclosure; -
FIG. 23 is a perspective view of the crash guard mounted to the field case according to the principles of the present disclosure; -
FIG. 24 is an exploded perspective view of the crash guard and field case according to the principles of the present disclosure; -
FIG. 25 is a rear perspective view of the crash guard mounted to the field case and receiving the blade in a rear blade guard portion according to the principles of the present disclosure; -
FIG. 26 is top view of the field case illustrating the sight guide according to the principles of the present disclosure; -
FIG. 27 is a perspective view of a portable band saw illustrating the light system according to the principles of the present disclosure; -
FIG. 28 is perspective view of the light assembly according to the principles of the present disclosure; and -
FIG. 29 is an exploded perspective view of the light assembly according to the principles of the present disclosure. - Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
- The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. Although the following description is related generally to portable band saws, it will be understood that the systems and features of the portable band saw, as described and claimed herein, can be used with any appropriate portable tool, such as an appropriate portable cutting device, for example, a circular saw, reciprocating saw, etc. Therefore, it will be understood that the following discussions are not intended to limit the scope of the appended claims.
- With reference to
FIG. 1 , a portable band saw 10 is shown. The portable band saw 10 can be used to cut through various metal, metal alloy and/or polymeric work-pieces. The portable band saw 10 can include ahousing 12, apower system 14, asaw blade system 16 and alighting system 18. Thehousing 12 can enclose and/or support each of thepower system 14, thesaw blade system 16 and thelighting system 18. Thepower system 14 can power thesaw blade system 16, such that thesaw blade system 16 can cut through the desired structure. Thelighting system 18 can illuminate a work surface associated with the cutting operation of thesaw blade system 16 to facilitate the operation of the portable band saw 10. - With reference to
FIGS. 1 and 2 , thehousing 12 can include a first orfront section 20 and a second orrear section 22, which can be joined together by afield case 21, one or more compression rods 24 and at least one tension screw/bolt 26. As thefront section 20 and therear section 22 of thehousing 12 can be substantially similar to a housing associated with a commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., thefront section 20 and therear section 22 will not be discussed in great detail herein. Briefly, however, thefront section 20 andrear section 22 can be composed of a metal or metal alloy material, and can comprise cast aluminum alloy or magnesium alloy, for example. Thefront section 20 can include a first orauxiliary handle 28, while therear section 22 can include a second or triggerhandle 30. Each of thefront section 20 and therear section 22 can include abumper system 32. - The
auxiliary handle 28 can provide additional stability for the user of the portable band saw 10, and can be indexed at multiple angles to enable the user to select a comfortable position for the operation of the portable band saw 10, which can improve the ease of use of the portable band saw 10. Theauxiliary handle 28 can be coupled to thefront section 20 of thehousing 12 and can pivot or rotate relative to thehousing 12. With additional reference toFIGS. 3-6 , theauxiliary handle 28 can include a knob 34 (FIGS. 3 and 4 ), a washer 36 (FIG. 4 ), a first insert 38 (FIGS. 3 and 5 ), a second insert 40 (FIGS. 3 and 5 ), a handle body 42 (FIGS. 3 , 4 and 6) and a carriage bolt 44 (FIGS. 3 and 4 ). - With reference to
FIGS. 3 and 4 , theknob 34 can comprise any suitable graspable portion that can enable a user to easily rotate theknob 34 in a clockwise or counterclockwise direction while the user is holding thetrigger handle 30. Theknob 34 can be rotated relative to thehousing 12 in a clockwise direction to secure theauxiliary handle 28 to thehousing 12, and can be rotated in a counterclockwise direction to release theauxiliary handle 28 from thehousing 12. In this regard, theknob 34 can include abore 34 a. Thebore 34 a can include threads, which can threadably engagemating threads 44 a on thecarriage bolt 44. Thus, the rotation of theknob 34 relative to thehousing 12 can move theknob 34 along thethreads 44 a of thecarriage bolt 44 to either tighten or lock theauxiliary handle 28 on thehousing 12, or to release or loosen theauxiliary handle 28 relative to thehousing 12, and thus, enable theauxiliary handle 28 to be pivoted or indexed relative to thehousing 12. - With reference to
FIG. 4 , thewasher 36 can be positioned between theknob 34 and thefirst insert 38 to distribute the tightening or compressive force from theknob 34 over a surface of thefirst insert 38. With reference toFIGS. 3 and 5 , thefirst insert 38 can be coupled to afirst bore 46 formed in thehousing 12, and thesecond insert 40 can be coupled to asecond bore 48 formed in thehousing 12. It should be noted that although thefirst bore 46 and second bore 48 are identified as separate bores, thefirst bore 46 and second bore 48 could comprise a single bore formed through thehousing 12. Typically, thefirst bore 46 can be formed opposite thesecond bore 48. Thefirst insert 38 andsecond insert 40 can be coupled to thefirst bore 46 and second bore 48 through any suitable fastening technique, such as through the use of mechanical fasteners, a press-fit, a snap fit, welding and the like. Alternatively, theinserts FIG. 5 ) can be disposed within thebores handle 42. Generally, thefirst insert 38 andsecond insert 40 can be composed of a resilient material, which can comprise a metal, metal alloy, polymer or combinations thereof. For example, thefirst insert 38 andsecond insert 40 can be composed of a metal or metal alloy and a polymer can be overmolded onto the metal or metal alloy, if desired. Thefirst insert 38 andsecond insert 40 can each includemultiple detents protrusions 42 a formed on the handle body 42 (FIG. 3 ). Themultiple detents handle body 42 to be pivoted or indexed and secured to thehousing 12 in a variety of positions. The springs 41 allow theinserts protrusions 42 a of the handle body when thehandle 42 is subjected to a large force, such as by being dropped. The ability of the handle to move when subject to a large force, protects thehandle 42 and housing from being damaged if dropped. - With reference to
FIGS. 3 and 6 , thehandle body 42 can be generally U-shaped, and can include theprotrusions 42 a. Theprotrusions 42 a can be formed on oppositeannular projections 50. Theprotrusions 42 a can be sized to engage thedetents handle body 42 to be secured or coupled to thehousing 12 in any desired position. Generally, with reference toFIGS. 7-9 , thehandle body 42 can be angled or indexed relative to thehousing 12 in any position from about zero degrees (FIG. 7 ) to about ninety degrees (FIG. 8 ). For example, as shown inFIG. 9 , thehandle body 42 can be coupled to thehousing 12 at about forty-five degrees. With reference back toFIG. 6 , theannular projections 50 can includethroughbores 52. Thethroughbores 52 can slideably engage thecarriage bolt 44 to enable thehandle body 42 to rotate or pivot about thecarriage bolt 44 when theknob 34 is rotated accordingly, as shown inFIGS. 3 and 4 . - With reference to
FIGS. 3 and 4 , thecarriage bolt 44 can include thethreads 44 a and ahead 44 b. Thethreads 44 a can engage thebore 34 a of theknob 34 to enable thehandle body 42 to be secured to or released from thehousing 12. Thehead 44 b can be sized such that thehead 44 b can apply a compressive force against one of theannular projections 50 of thehandle body 42 when theauxiliary handle 28 is coupled to thehousing 12, as shown best inFIGS. 7-9 . - With reference to
FIG. 1 , the trigger handle 30 can be coupled to therear portion 22 of thehousing 12. As the trigger handle 30 can be substantially similar to a trigger handle associated with the commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., the trigger handle 30 will not be discussed in great detail herein. Briefly, however, the trigger handle 30 can enable the user to activate or deactivate the portable band saw 10, and can enable the user to guide the portable band saw 10 over a work-piece. - The
housing 12 can include thebumper system 32, as shown inFIG. 1 . Thebumper system 32 can be coupled to thefront section 20 and therear section 22. Thebumper system 32 can protect the portable band saw 10 from inadvertent falls from various heights. Further, thebumper system 32 can be easily replaceable such that the user of the portable band saw 10 can replace thebumper system 32 himself or herself at a job site, without requiring the user to take the portable band saw 10 to a service station. Thebumper system 32 can generally be configured to absorb a significant shock load, which can thereby prevent damage to thehousing 12. By preventing damage to thehousing 12, the portable band saw 10 may remain operable after a significant fall. With additional reference toFIG. 10 , thebumper system 32 can include afront bumper 54 that can be coupled to thefront section 20, and arear bumper 56 that can be coupled to therear section 22. - With reference to
FIGS. 10-12 , thefront bumper 54 can include ashroud 54 a and abumper 54 b. Theshroud 54 a can be shaped to conform to a shape of thefront section 20, and can include a first ortop surface 60, a second orside surface 62 and one or more coupling features 64. Theshroud 54 a can be a monolithic member, but could also comprise one or more members to enable partial replacement of thefront bumper 54, if desired. Theshroud 54 a can be composed of any suitable high strength material, such as a metal, metal alloy or polymer, and for example, steel. Theshroud 54 a can be coupled to thefront section 20, via any suitable mechanical fastening technique, such as through a snap-fit or the use of mechanical fasteners, for example, rivets, bolts, screws, etc. Generally, as shown inFIG. 10 , thetop surface 60 can protect atop surface 20 a of thefront section 20, while theside surface 62 can protect anannular area 20 b below thetop surface 20 a of thefront section 20. The coupling features 64 can couple thetop surface 60 of theshroud 54 a to thetop surface 20 a of thefront section 20, and can couple theside surface 62 to theannular area 20 b. If mechanical fasteners are employed to couple theshroud 54 a to thehousing 12, then the coupling features 64 can comprise apertures, however, it will be understood that the coupling features 64 can comprise any desired feature to attach theshroud 54 a to thehousing 12, such as mating projections. - With continuing reference to
FIGS. 10-12 , thebumper 54 b can be shaped to conform to a shape of theside surface 62 of theshroud 54 a, and as best shown inFIG. 12 , can include aninsert 66, apolymeric member 68 and one or more coupling features 70. Thebumper 54 b can be a monolithic member, but could also comprise one or more members to enable partial replacement of thefront bumper 54, if desired. Theinsert 66 can be composed of any suitable high strength material, for example, a metal, metal alloy or polymer, such as steel. Theinsert 66 can provide thebumper 54 b with added rigidity. Theinsert 66 can be disposed adjacent to theside surface 62 of theshroud 54 a when thebumper 54 b is coupled to theshroud 54 a. - The
polymeric member 68 can be coupled adjacent to asurface 66 a of theinsert 66. Thepolymeric member 68 can be coupled to theinsert 66 through any suitable technique, such as by overmolding thepolymeric member 68 onto theinsert 66, or by insert molding theinsert 66 within thepolymeric member 68. Thepolymeric member 68 can be composed of any suitable shock absorbing material, for example, rubber. The coupling features 70 can couple thebumper 54 b to theshroud 54 a. Thebumper 54 b can be coupled to theshroud 54 a, via any suitable mechanical fastening technique, such as through a snap-fit or the use of mechanical fasteners, for example, rivets, bolts, screws, etc. If mechanical fasteners are employed to couple thebumper 54 b to thehousing 12, then the coupling features 70 can comprise apertures that extend through both theinsert 66 and thepolymeric member 68, however, it will be understood that the coupling features 70 can comprise any desired feature to attach thebumper 54 b to thehousing 12, such as mating projections. - With reference to
FIG. 10 , therear bumper 56 can be coupled to therear section 22 of thehousing 12. Generally, therear bumper 56 can be coupled to aside 22 a of therear section 22, to protect an annular area surrounding atop surface 22 b of therear section 22. Therear bumper 56 can be annular, however, therear bumper 56 can be shaped as desired to conform to the shape of therear section 22. Therear bumper 56 can be a monolithic member, but could also comprise one or more members to enable partial replacement of therear bumper 56, if desired. With reference toFIG. 13 , therear bumper 56 can include aninsert 72, apolymeric member 74 and one or more coupling features 76. - The
insert 72 can be composed of any suitable high strength material, for example, a metal, metal alloy or polymer, such as steel. Theinsert 72 can provide therear bumper 56 with added rigidity. Theinsert 72 can be disposed adjacent to theside 22 a of therear section 22 when therear bumper 56 is coupled to therear section 22. - The
polymeric member 74 can be coupled adjacent to asurface 72 a of theinsert 72. Thepolymeric member 74 can be coupled to theinsert 72 through any suitable technique, such as by overmolding thepolymeric member 74 onto theinsert 72, or by insert molding theinsert 72 within thepolymeric member 74. Thepolymeric member 74 can be composed of any suitable shock absorbing material, for example, rubber. - The coupling features 76 can couple the
rear bumper 56 to therear section 22. Therear bumper 56 can be coupled to therear section 22, via any suitable mechanical fastening technique, such as through a snap-fit or the use of mechanical fasteners, for example, rivets, bolts, screws, etc. If mechanical fasteners are employed to couple therear bumper 56 to thehousing 12, then the coupling features 76 can comprise apertures that extend through both theinsert 72 and thepolymeric member 74, however, it will be understood that the coupling features 76 can comprise any desired feature to attach therear bumper 56 to thehousing 12, such as mating projections. - With reference to
FIG. 2 , thefield case 21 can be coupled between thefront section 20 and therear section 22 of thehousing 12. Generally, thefield case 21 can be composed of a polymeric material, and can house at least a portion of thepower system 14. Thefield case 21 can include afirst bore 21 a, asecond bore 21 b and athird bore 21 c. The first bore 21 a, thesecond bore 21 b and thethird bore 21 c can extend at least partially through thefield case 21. For example, the first bore 21 a and thesecond bore 21 b can be formed in thefield case 21 such that a center area of the first bore 21 a andsecond bore 21 b can be devoid of thefield case 21 to enable a portion of thesaw blade system 16 to be coupled to thefield case 21, via the compression rods 24, as will be discussed. The first bore 21 a and thesecond bore 21 b can be disposed at one side of thefield case 21 and can be sized to receive the compression rods 24. Thethird bore 21 c can pass through a side of thefield case 21 opposite the first bore 21 a andsecond bore 21 b. Thethird bore 21 c can be sized to receive the tension screw/bolt 26. - With reference to
FIGS. 2 and 14 , the compression rods 24 can be coupled between thefront section 20 and therear section 22. Afirst compression rod 24 a can be received in the first bore 21 a, and asecond compression rod 24 b can be received in thesecond bore 21 b of thefield case 21, as shown inFIG. 14 . Thefront section 20 and therear section 22 can retain the compression rods 24 within thefield case 21. The compression rods 24 can receive a compression load C that can be generally inherent in the portable band saw 10, and thus, the compression rods 24 can relieve thefield case 21 from the compression load C, which can remove the compliant nature associated with thefield case 21 being composed of a polymeric material. The compression rods 24 can also couple at least a portion of thesaw blade system 16 to thefield case 21, as will be discussed herein. - With continued reference to
FIGS. 2 and 14 , the tension screw/bolt 26 can be received through thethird bore 21 c of thefield case 21, and can extend from thefront section 20 to therear section 22. The tension screw/bolt 26 can be threaded into abore 80 defined in therear section 22, which can serve to retain the tension screw/bolt 26 within thebore 21 c. The tension screw/bolt 26 can receive a tension or tensile load T that can be generally inherent in the portable band saw 10, and thus, the tension screw/bolt 26 can relieve thefield case 21 from the tensile load T, which can remove the compliant nature associated with having thefield case 21 composed of a polymeric material. - With reference to
FIG. 15 , thepower system 14 can be encased by thehousing 12. Thepower system 14 can drive thesaw blade system 16 to cut the work-piece. Thepower system 14 can include atrigger 100, amotor 102 and acontrol system 104 via one ormore wires 100 b (shown inFIG. 16 ). As thetrigger 100 andmotor 102 can be substantially similar to a trigger and motor associated with a commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., thetrigger 100 andmotor 102 will not be discussed in great detail herein. Briefly, however, thetrigger 100 can include an actuator 100 a that can be in communication with thecontrol system 104. The actuator 100 a can protrude from the trigger handle 30 to enable a user to activate or deactivate the portable band saw 10. Based on the input from the user, the actuator 100 a can transmit a signal to thecontrol system 104 to activate themotor 102. - With reference to
FIG. 15 , themotor 102 can be a DC motor, such as a brushless DC motor. Themotor 102 can be housed in thefield case 21, and can be responsive to and in communication with thecontrol system 104. Themotor 102 can also be coupled to thesaw blade system 16, via an output shaft, for example, to drive thesaw blade system 16. As will be discussed, based on the input received by the actuator 100 a, thecontrol system 104 can provide themotor 102 with an appropriate current at an appropriate voltage phase angle to drive thesaw blade system 16. - The
control system 104 can be coupled to afirst end 21 d of thefield case 21, adjacent to themotor 102. Thecontrol system 104 can be operable to activate and deactivate themotor 102 based on the user input received from thetrigger 100. With reference toFIGS. 15-18 , thecontrol system 104 can include a component box 106 (FIGS. 15 , 17 and 18), a controller 108 (FIG. 18 ), a lighting power supply 110 (FIG. 18 ) and a wiring harness 112 (FIGS. 16-18 ). - With reference to
FIGS. 17 and 18 , thecomponent box 106 can be composed of a polymeric material, which can serve to electrically insulate the electrical components within thecomponent box 106 from the metallic portions of thehousing 12, such as thefront section 20 and therear section 22. Thecomponent box 106 can includeapertures 114, acomponent cavity 116, afirst routing cavity 118, asecond routing cavity 120, andcoupling members 122. Theapertures 114 can receive mechanical fasteners, such as screws, bolts, etc. to couple thecomponent box 106 to thefield case 21. Thecomponent cavity 116 can be generally rectangular, and can have a depth sized to receive and retain thecontroller 108 and thelighting power supply 110 within thecomponent box 106, as shown inFIG. 17 . Thefirst routing cavity 118 andsecond routing cavity 120 can be sized to enable wires from thewiring harness 112 to be routed away from the metallic portions of thehousing 12. Thecoupling members 122 can retain thecontroller 108 and thelighting power supply 110 within thecomponent box 106. Thecoupling members 122 can comprise flexible arms to enable thecontroller 108 and thelighting power supply 110 to be inserted into thecomponent box 106. - With reference to
FIG. 18 , thecontroller 108 can be in communication with and responsive to thetrigger 100 and themotor 102 to enable the operation of the portable band saw 10, as will be discussed. Thecontroller 108 can also be in communication with and responsive to thelighting system 18 to activate or deactivate thelighting system 18, as will also be discussed herein. It should be understood that as used herein, the term controller refers to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that execute one or more software or firmware programs, a combinational logic circuit, or other suitable components that provide the described functionality. Further, as thecontroller 108 can be substantially similar to a controller associated with a commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., thecontroller 108 will not be discussed in great detail herein. Briefly, however, thecontroller 108 can provide a selected current at a selected voltage phase angle to themotor 102 from a field power source (not shown) based on the signal received from the actuator 100 a. Thecontroller 108 can also provide current to thelighting system 18 from thelighting power supply 110 based on a signal received from thelighting system 18, as will be discussed. - With reference to
FIG. 18 , thelighting power supply 110 can comprise any suitable power source capable of providing current to thelighting system 18, such as a battery, capacitor, etc. Thelighting power supply 110 can includemembers 110 a to couple thewiring harness 112 to thecomponent box 106. Thewiring harness 112 can include apertures formed in aprojection 112 a that can receive themembers 110 a to couple thewiring harness 112 to thecomponent box 106. Generally, thewiring harness 112 can be press-fit onto themembers 110 a. - With reference to
FIG. 16 , thewiring harness 112 can include one ormore controller connections 124, alighting connection 126, a lightingpower supply connection 128 and afeedback coil 130. Thecontroller connections 124, thelighting connection 126, the lightingpower supply connection 128 and thefeedback coil 130 can be overmolded with a polymeric material to form thewiring harness 112. As thecontroller connections 124, thelighting connection 126 and the lightingpower supply connection 128 can be similar to the connections employed with the commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., thecontroller connections 124, thelighting connection 126 and the lightingpower supply connection 128 will not be discussed in great detail herein. Thefeedback coil 130 can be disposed within acenter 132 of theovermolded wiring harness 112, which can be adjacent to themotor 102 when thecomponent box 106 is coupled to thefield case 21. Thefeedback coil 130 can sense the magnetic field generated by themotor 102, and can communicate this information to thecontroller 108 via an appropriate one of thecontroller connections 124. Based on the signal from thefeedback coil 130, thecontroller 108 can increase or decrease the speed of themotor 102. By incorporating thefeedback coil 130 within thecenter 132 of theovermolded wiring harness 112, thefeedback coil 130 can remain in the same position during the use of the portable band saw 10, which can improve the accuracy of the signal received from thefeedback coil 130. - With reference to
FIG. 19 , thesaw blade system 16 can be driven by themotor 102 of thepower system 14. Thesaw blade system 16 can include ablade 200, one ormore pulleys 202, ashoe 204, acrash plate system 206 and asight guide 208. Theblade 200 can comprise a conventional band saw blade, such as a Bi-Metal Portable Band Saw Blade, model DW3891, commercially available from DeWALT Industrial Tool Co. of Baltimore, Md. Thepulleys 202 can be substantially similar to pulleys associated with the commercially available Heavy-Duty Deep Cut Variable Speed Band Saw, model D28770, manufactured by DeWALT Industrial Tool Co. of Baltimore, Md., and thus, thepulleys 202 will not be discussed in great detail herein. Briefly, however, one of thepulleys 202 can be coupled to themotor 102 to drive theblade 200 around thehousing 12. - With reference to
FIGS. 20-22 , theshoe 204 can be positioned adjacent to the work-piece to support the work-piece during the operation of the portable band saw 10. Theshoe 204 can be configured to enable the user of the portable band saw 10 to adjust a position of theshoe 204 relative to the work-piece without requiring tools. Theshoe 204 can include ashoe body 210, ablock 212, astud 214 and alever 216. - With reference to
FIGS. 20 and 21 , theshoe body 210 can define afirst end 218, asecond end 220, a first orfront side 222 and a second orrear side 224. Thefirst end 218 can include one ormore apertures 226 and ablade passage 228. Theapertures 226 can be sized to receive one or moremechanical fasteners 226 a, such as screws, bolts, etc., to couple theshoe body 210 to theblock 212. Theblade passage 228 can enable theblade 200 to pass through theshoe body 210. Thesecond end 220 of theshoe body 210 can be positioned adjacent to the work-piece when theshoe 204 is coupled to thehousing 12. Thefront side 222 can face thefront section 20 when theshoe 204 is coupled to therear section 22. Therear side 224 can be opposite thefront side 222, and thus, can be adjacent to therear section 22 when theshoe 204 is coupled to therear section 22. Therear side 224 can also include alip 224 a (FIG. 21 ). Thelip 224 a can cooperate with theblock 212 to couple or clamp theshoe body 210 to therear section 22 of thehousing 12. - The
block 212 can be coupled to theshoe body 210 via themechanical fasteners 226 a. Theblock 212 can include aprojection 230, a clampingsurface 232 and mating features 234. With reference toFIG. 22 , theprojection 230 can be generally elliptical, and can be sized to slide within aslot 236 formed in therear section 22 of thehousing 12. As will be discussed, theblock 212 can cooperate with theslot 236 to enable theshoe body 210 to be positioned and secured in any desired position along a length of theslot 236. Theslot 236 can comprise a T-slot to enable only theprojection 230 of theblock 212 to be received in and slide within theslot 236. As shown inFIG. 20 , theprojection 230 can defineapertures 230 a for receipt of themechanical fasteners 226 a to couple theblock 212 to theshoe body 210, and thus, theapertures 230 a can be threaded, if necessary, to mate with themechanical fasteners 226 a. - With reference to
FIGS. 20 and 22 , the clampingsurface 232 can cooperate with thelip 224 a to couple or clamp theshoe 204 to therear section 22 of thehousing 12. In this regard, therear section 22 of thehousing 12 can include arail 238 adjacent to the slot 236 (FIG. 22 ). When theprojection 230 is positioned within theslot 236, thelip 224 a can abut against a first side of therail 238 and the clampingsurface 232 can abut against a second side of therail 238 to clamp theshoe 204 to thehousing 12. With reference toFIG. 21 , the clampingsurface 232 can include ataper 232 a. Thetaper 232 a can enable theblock 212 to be forced tightly against therail 238 to firmly clamp theshoe body 210 to thehousing 12. - With reference to
FIGS. 20-22 , the mating features 234 can be defined on a surface opposite the clampingsurface 232. The mating features 234 can include any feature capable of engaging thestud 214 in a variety of positions, such as ridges, angled projections, detents, etc. The mating features 234 can engage thestud 214 such that a force applied to thestud 214, via thelever 216, can be applied to theblock 212 to clamp theshoe 204 to thehousing 12. Thus, the mating features 234 can cooperate with thestud 214 to lock or secure theshoe 204 in a desired vertical position relative to thehousing 12. - With reference to
FIGS. 20 and 22 , thestud 214 can include afirst end 240 and asecond end 242. Thefirst end 240 of thestud 214 can include at least onemating feature 240 a. The mating feature 240 a can be configured to engage the mating features 234 on theblock 212 to transmit a torque from thelever 216 to theblock 212 to clamp theshoe 204 to thehousing 12. For example, if the mating features 234 of theblock 212 comprise angled projections, then themating feature 240 a of thestud 214 can comprise a valley. Thesecond end 242 of thestud 214 can be configured to couple thelever 216 to thestud 214, and thus, thesecond end 242 can define a bore that can be threaded, keyed, notched, etc. to couple thelever 216 to thestud 214. - With reference to
FIGS. 20 and 22 , thelever 216 can include afirst end 216 a that can couple thelever 216 to thestud 214, and asecond end 216 b that can receive an input from the user of the portable band saw 10. Thefirst end 216 a can be configured to mate within the bore 242 a of thesecond end 242 of thestud 214, and thus, thefirst end 216 a can be threaded, keyed, notched, etc. to fixedly couple thelever 216 to thestud 214. In addition, it should be understood that although thestud 214 andlever 216 are described herein as being discrete elements, thestud 214 andlever 216 could also be integrally formed. Thesecond end 216 b of thelever 216 can be sized such that the user can easily grasp thelever 216 to rotate thelever 216 clockwise or counterclockwise relative to thehousing 12. In this regard, thelever 216 can be rotated clockwise to apply the torque to theblock 212, via thestud 214, to clamp theshoe 204 in a desired position relative to thehousing 12. Thelever 216 can be rotated counterclockwise to release the torque from theblock 212, by disengaging the mating features 234 of theblock 212 from themating feature 240 a of thestud 214, to enable theprojection 230 of theblock 212 to be slid into a desired position within theslot 236. Thus, thelever 216 can enable tool-less adjustment of theshoe 204 relative to thehousing 12, which can enable quick adjustments of theshoe 204 on a job site. - With reference to FIGS. 19 and 23-25, the
saw blade system 16 can also include thecrash plate system 206. Thecrash plate system 206 can protect abottom 250 of thefield case 21 from damage that may be caused by the portable band saw 10 contacting the work-piece after the cutting operation due to the inherent follow through motion of the portable band saw 10. Thecrash plate system 206 can include acrash plate 252 and ablade guard 254. Thecrash plate 252 andblade guard 254 can be discrete members, or can be integrally formed into a monolithic member. Thecrash plate 252 andblade guard 254 can be composed of any suitable high strength material, such as a metal, metal alloy or resilient polymer. Thecrash plate 252 can protect thefield case 21 from damage, while theblade guard 254 can protect the user from arear section 200 a of the blade 200 (FIG. 25 ). - The
crash plate 252 can be configured to mate with thebottom 250 of thefield case 21, and for example, can be generally concave in shape. As shown inFIG. 24 , thecrash plate 252 can also be sized to fit in the void defined between the first bore 21 a andsecond bore 21 b of thefield case 21, so that thecompression rods crash plate 252 to thefield case 21. It will be understood that any suitable technique could be used to couple thecrash plate 252 to thefield case 21, such as welding, adhesives, mechanical fasteners, etc. Thecrash plate 252 can include atop surface 256, arear surface 258, afirst side 260, asecond side 262 and throughbores 264. - With reference to
FIGS. 23 and 24 , thetop surface 256 can be positioned adjacent to thefield case 21, and can be generally smooth to mate with a generally smooth exterior of thefield case 21. Therear surface 258 can be opposite thetop surface 256, and can include one ormore crush ribs 258 a. Thecrush ribs 258 a can absorb and distribute forces incurred when the portable band saw 10 inadvertently contacts the work-piece. Thefirst side 260 can be coupled to thesight guide 208, and thesecond side 262 can be coupled to theblade guard 254. The throughbores 264 can be sized to slideably receive the compression rods 24 therethrough to couple thecrash plate 252 to the field case 21 (FIG. 23 ). - With reference to FIGS. 19 and 23-25, the
blade guard 254 can be coupled to or formed on thesecond side 262 of thecrash plate 252. As discussed, theblade guard 254 can protect or guard the user from therear portion 200 a of the blade 200 (FIG. 25 ), and can also shield theblade 200 from debris or objects adjacent to the work-piece. Theblade guard 254 can define apassage 254 a. Thepassage 254 a can be sized to enable theblade 200 to pass therethrough, and can generally have a depth configured such that a majority of theblade 200 is disposed within thepassage 254 a. - With reference to
FIGS. 24 and 26 , thesight guide 208 can be coupled to thefirst side 260 of the crash plate 252 (FIG. 24 ). In this regard, thesight guide 208 can be coupled to thefirst side 260 such that thesight guide 208 can extend substantially an entire length of thefirst side 260 of thecrash plate 252. Thesight guide 208 can be comprised of any suitable material, such as a metal, metal alloy or polymer, that can be coated with a color, which contrasts with thefield case 21, such as red, to enable the user to easily view thesight guide 208. Thesight guide 208 can be coupled to thecrash plate 252 via any suitable technique, such as molding, adhesives, mechanical fasteners, etc. For example, thesight guide 208 can comprise a polymeric material that can be adhesively coupled to thecrash plate 252, or thesight guide 208 can comprise a polymeric coating, such as paint, that can be applied to thefirst side 260 of thecrash plate 252. Thesight guide 208 can assist the user in predicting the cutting plane of theblade 200, without reducing or altering theblade 200. In use, the user can align thesight guide 208 with a line or scribe on the work-piece and maintain this alignment throughout the cutting operation, which can assist the user in producing accurate cuts. - With reference to
FIGS. 27-29 , thelighting system 18 can illuminate the work-piece, generally in an area adjacent to and encompassing the desired cutting area or cutting path through the work-piece. Thelighting system 18 can be housed within thecomponent box 106 of thecontrol system 104 on thefront section 20 of thehousing 12. Thelighting system 18 can include a light source 300 (FIG. 29 ), a printed circuit board (PCB) 302 (FIG. 29 ), a baffle 304 (FIGS. 28 and 29 ), a housing 306 (FIGS. 28 and 29 ) and a switch 308 (FIG. 27 ). - With reference to
FIGS. 27 and 29 , thelight source 300 can comprise any suitable light emitting device, such a light emitting diode (LED), organic light emitting diode (OLED), etc. If a LED is employed as thelight source 300, the LED can comprise a one-half watt LED. Thelight source 300 can emit light rays R onto the work-piece to aid the user in the cutting operation. Thelight source 300 can be coupled to thePCB 302. - With reference to
FIG. 29 , thePCB 302 can be in communication with and responsive to thecontroller 104, via aconnector 302 a, to receive power or current from thelighting power supply 110. ThePCB 302 can include suitable circuitry to power thelight source 300 with the power received from thelighting power supply 110. Upon receipt of the current from thecontroller 104, thePCB 302 can activate thelight source 300 to illuminate the work-piece. - With reference to
FIGS. 28 and 29 , thebaffle 304 can be positioned over thelight source 300 and thePCB 302. Thebaffle 304 can be generally annular, and can be sized to surround thelight source 300 and thePCB 302 such that thePCB 302 is hidden from the view of the user. Thebaffle 304 can be composed of any suitable heat resistant material, such as a metal, metal alloy or polymer. Thebaffle 304 can include abore 304 a, ashade 304 b andkeys 304 c. Thebore 304 a can be sized to enable thelight source 300 and thePCB 302 to be retained within thebaffle 304. Theshade 304 b can be generally V-shaped, and can cover at least a portion of thelight source 300. Theshade 304 b can prevent the light rays from thelight source 300 from shining in the user's eyes. Thekeys 304 c can ensure that thebaffle 304 is properly inserted within thehousing 306, and that thebaffle 304 does not rotate relative to thehousing 306. - The
housing 306 can couple thelighting system 18 to thecomponent box 106. Thehousing 306 can be composed of any suitable material, such as a metal, metal alloy or polymer, and can generally comprise a translucent polymer. Thehousing 306 can include abore 306 a and at least onecoupling feature 306 b. Thebore 306 a can be configured to receive thebaffle 304, and can includemating keys 312. Themating keys 312 can engage thekeys 304 c of thebaffle 304, which can ensure that thebaffle 304 is properly orientated and remains properly orientated within thehousing 306. Thecoupling feature 306 b can couple thehousing 306 to thecomponent box 106. For example, thecoupling feature 306 b can comprise a bore for receipt of a mechanical fastener, such as a screw, bolt, etc. to couple thehousing 306 to thecomponent box 106, as shown inFIG. 15 . - With reference to
FIGS. 15 and 27 , theswitch 308 can also be coupled to thecomponent box 106, and can be in communication with thecontroller 108. Theswitch 308 can be coupled to thecomponent box 106 such that theswitch 308 can be easily manipulated by the user. In this regard, theswitch 308 can enable the user to activate or deactivate thelight source 300. Thus, based on the user input received, theswitch 308 can transmit a signal to thecontroller 108, which can then transmit or cease transmitting power to thePCB 302, effectively activating or deactivating thelight source 300. - In order to assemble the
lighting system 18, thelight source 300 can be coupled to thePCB 302, and that assembly can be inserted into thebaffle 304. Then, thebaffle 304 can be inserted into thehousing 306, which can then be coupled to thecomponent box 106. The user can then manipulate theswitch 308 to activate or deactivate thelight source 300. Thus, thelighting system 18 can be easily assembled and coupled to the portable band saw 10 to enable a user to selectively illuminate the work-piece, while not projecting light rays into the user's eyes. - The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the invention, and all such modifications are intended to be included within the scope of the invention.
Claims (3)
1. A portable band saw, comprising:
a housing including a front section and a rear section;
a blade extending between said front section and said rear section; and
a shoe body adjustably attached to said housing and including a blade passage for receiving said blade therein, said shoe body being secured to said housing by a toolless adjustment mechanism that adjustably engages a toothed block on said shoe body.
2. The portable band saw according to claim 1 , wherein said toolless adjustment mechanism includes a lever engaging a threaded stud that adjustable engages said toothed block.
3. The portable band saw according to claim 1 , wherein said toothed block is slidably disposed in a slot in said housing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/319,922 US20140310964A1 (en) | 2008-01-31 | 2014-06-30 | Portable Band Saw |
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US2521708P | 2008-01-31 | 2008-01-31 | |
US12/362,766 US8763258B2 (en) | 2008-01-31 | 2009-01-30 | Portable band saw |
US14/319,922 US20140310964A1 (en) | 2008-01-31 | 2014-06-30 | Portable Band Saw |
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US12/362,766 Division US8763258B2 (en) | 2008-01-31 | 2009-01-30 | Portable band saw |
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US14/319,922 Abandoned US20140310964A1 (en) | 2008-01-31 | 2014-06-30 | Portable Band Saw |
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US10835972B2 (en) | 2018-03-16 | 2020-11-17 | Milwaukee Electric Tool Corporation | Blade clamp for power tool |
USD887806S1 (en) | 2018-04-03 | 2020-06-23 | Milwaukee Electric Tool Corporation | Jigsaw |
US11014176B2 (en) | 2018-04-03 | 2021-05-25 | Milwaukee Electric Tool Corporation | Jigsaw |
US11813682B2 (en) | 2018-04-03 | 2023-11-14 | Milwaukee Electric Tool Corporation | Jigsaw |
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US8763258B2 (en) | 2014-07-01 |
US20090265943A1 (en) | 2009-10-29 |
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