US20050172447A1 - Floor cleaning apparatus with twin agitators having different diameters - Google Patents
Floor cleaning apparatus with twin agitators having different diameters Download PDFInfo
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- US20050172447A1 US20050172447A1 US11/051,778 US5177805A US2005172447A1 US 20050172447 A1 US20050172447 A1 US 20050172447A1 US 5177805 A US5177805 A US 5177805A US 2005172447 A1 US2005172447 A1 US 2005172447A1
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- Prior art keywords
- agitator
- cleaning apparatus
- floor cleaning
- agitators
- nozzle assembly
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- 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.)
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0405—Driving means for the brushes or agitators
- A47L9/0411—Driving means for the brushes or agitators driven by electric motor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
- A47L9/0466—Rotating tools
- A47L9/0477—Rolls
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0494—Height adjustment of dust-loosening tools
Definitions
- the present invention relates generally to the floor care field and, more particularly, to a floor cleaning apparatus incorporating twin agitators having different diameters.
- a vacuum cleaner is an electromechanical appliance utilized to effect the dry removal of dust, dirt and other small debris from carpets, rugs, fabrics or other surfaces in both domestic and industrial environments.
- a rotary agitator is provided to beat dirt and dust from the nap of the carpet and a pressure drop or vacuum is used to force air entrained with this dirt and dust into the nozzle of the vacuum cleaner.
- the particulate-laden air is then drawn through a bag-like filter, a dirt cup or a cyclonic separation chamber and filter combination which traps the dirt and dust, while substantially clean air is exhausted by an electrically operated fan that is driven by an on board motor. It is this fan and motor arrangement that generates the drop in air pressure necessary to provide the desired cleaning action.
- the fan and motor arrangement is commonly known as the vacuum or suction generator.
- a dual motor system In such a system, a separate agitator drive motor is provided in addition to the motor of the suction generator. In most designs the separate agitator drive motor is mounted on the nozzle assembly adjacent the agitator. A gear drive or more commonly a pulley and belt arrangement transmits the power from the agitator motor drive shaft to the agitator.
- the present invention relates to a multi-agitator floor cleaning apparatus such as an upright vacuum cleaner, canister vacuum cleaner, hand-held vacuum cleaner or extractor wherein the agitators are of different diameters.
- a floor cleaning apparatus provides maximum cleaning performance while also limiting the height of the nozzle assembly.
- the vacuum cleaner is easy to maneuver and has a relatively low profile so as to allow cleaning under beds, chairs and the like.
- an improved floor cleaning apparatus comprises a nozzle assembly, a canister assembly and a suction generator carried on one of the nozzle assembly and the canister assembly. Additionally, the floor cleaning apparatus includes a dirt collection vessel also carried on one of the canister assembly and the nozzle assembly. Still further, a first agitator having a first diameter D 1 is carried on the nozzle assembly. Additionally, a second agitator having a second diameter D 2 is carried on the nozzle assembly. The first diameter D 1 is greater than the second diameter D 2 . At least one agitator drive motor is carried on either the nozzle assembly or the canister assembly to drive the first and second agitators.
- the canister assembly may be pivotally connected to the nozzle assembly.
- the dirt collection vessel may take any of various forms including but not limited to a filter bag, a dirt cup and a cyclonic airflow chamber.
- the cleaning apparatus itself may be a device selected from a group consisting of an upright vacuum cleaner, a canister vacuum cleaner, a hand-held vacuum cleaner and an extractor.
- the second agitator diameter D 2 is between about 75 and about 90 percent of the first agitator diameter D 1 . More specifically, the first diameter D 1 is between about 50 mm and about 63 mm while the second diameter D 2 is between about 37 mm and about 57 mm.
- a method for providing an improved floor cleaning apparatus.
- the method includes the steps of equipping the floor cleaning apparatus with a first agitator having a diameter D 1 and a second agitator having a diameter D 2 , where D 1 is greater than D 2 , and driving those two agitators.
- the agitators may be driven at different speeds and/or in different directions.
- the floor cleaning apparatus provides enhanced cleaning performance and a relatively low profile and compact nozzle assembly that is easily maneuvered over a surface to be cleaned and has the necessary clearance to be used under beds, chairs and the like.
- FIG. 1 is a perspective view of a floor cleaning apparatus of the present invention, illustrated in the form of an upright vacuum cleaner;
- FIG. 2 is a transverse sectional view of the vacuum cleaner through the first agitator
- FIG. 3 is a detailed cross-sectional view of the first agitator and gear drive showing the engagement therebetween;
- FIG. 4 is a schematical representation of a first alternative agitator drive arrangement
- FIG. 5 is a schematical representation of a second alternative drive arrangement.
- FIG. 1 showing a floor cleaning apparatus 10 of the present invention.
- floor cleaning apparatus 10 takes the form of an upright vacuum cleaner. It should be appreciated, however, that the floor cleaning apparatus 10 may also take the form of a canister vacuum cleaner, a hand-held vacuum cleaner or even an extractor.
- the floor cleaning apparatus 10 includes a housing 14 that comprises the nozzle assembly 16 and the canister assembly 18 .
- the canister assembly 18 further includes the handle 20 and the hand grip 22 .
- the hand grip 22 carries a control switch 24 for turning the floor cleaning apparatus 10 on and off.
- electrical power is supplied to the floor cleaning apparatus 10 from a standard electrical wall outlet through a cord (not shown).
- the floor cleaning apparatus 10 could be powered by an onboard battery.
- a foot latch 30 functions to lock the canister assembly 18 in an upright position, as shown in FIG. 1 . When the foot latch 30 is released, the canister assembly 18 may be pivoted relative to the nozzle assembly 16 as the floor cleaning apparatus 10 is manipulated to clean the floor.
- the canister assembly 18 also carries an internal chamber 32 that houses a suction generator 33 (i.e. a state of the art fan and motor combination) and a dirt collection vessel 34 for removing dirt or dust entrained in the air stream as it passes from the nozzle assembly 16 to the suction generator.
- the canister assembly 18 may also carry a final filtration cartridge 48 to trap small particulates and prevent their reintroduction into the environment through the exhaust air stream.
- the nozzle assembly 16 includes a nozzle and agitator cavity 36 that houses a first agitator 38 a and a second agitator 38 b mounted in parallel so as to substantially form a nip or slight gap N therebetween.
- the two agitators 38 a and 38 b have differing diameters.
- the first agitator 38 a has a first diameter D 1 of between about 50 to about 63 mm.
- the second agitator 38 b has a diameter D 2 of between about 37 to about 57 mm.
- the second agitator 38 b has a diameter D 2 of between about 75 to about 90 percent of the diameter D 1 of the first agitator 38 a.
- the different diameters of the agitator 38 a and 38 b provide a number of benefits.
- the two agitators 38 a and 38 b have different footprints and, therefore, different cleaning characteristics as they beat dirt and debris from the nap of a rug or carpet.
- the two agitators 38 a and 38 b provide good cleaning action for a broader range of dirt and debris and, accordingly, provide overall enhanced cleaning efficiency.
- the relatively small diameter of the second or forward agitator 38 b allows the housing of the nozzle assembly 16 to be constructed with a lower overall forward profile. The lower clearance allows the nozzle assembly 16 to be freely maneuvered under low clearance overhangs such as commonly associated with beds, chairs, kitchen and bathroom cabinets and the like.
- the agitators 38 a and 38 b are each independently and rotatably driven by a motor 40 and cooperating gear drive 42 housed within the agitator and described in greater detail below (see FIGS. 2 and 3 ).
- the scrubbing action of the rotary agitators 38 a and 38 b and the negative air pressure created by the suction generator 33 cooperate to brush and beat dirt and dust from the nap of the carpet being cleaned and then draw the dirt and dust laden air from the agitator cavity 36 to the dirt collection vessel 34 .
- the dirt and dust laden air passes serially through a suction inlet and hose and/or an integrally molded conduit in the nozzle assembly 16 and/or canister assembly 18 as is known in the art.
- the vessel 34 serves to trap the suspended dirt, dust and other particles inside while allowing the now clean air to pass freely through the porous wall thereof and then through the suction generator 33 , final filtration cartridge 48 and ultimately to the environment through the exhaust port 50 .
- the dirt collection vessel 34 takes the form of a dust or filter bag of a type well known in the art.
- the dirt collection vessel could also be a dirt cup or even a cyclonic separation chamber if desired.
- substantially any vessel capable of collecting dirt may be utilized.
- FIGS. 2 and 3 show the mounting of the agitator motor 40 and associated gear drive 42 in one of the agitators 38 a in detail.
- the agitator 38 a is mounted for rotation relative to the nozzle assembly 16 .
- a first end of the agitator 38 a includes an end cap 52 which is supported on bearings 54 on a stub shaft 55 held in mounting block 56 keyed into slot 58 in the side of the nozzle assembly 16 .
- An end cap 60 at the opposite end of the agitator 38 a is supported on bearings 62 mounted on the housing 64 of the motor 40 .
- the motor 40 is fixed to the nozzle assembly 16 by means of the mounting block 66 fixed to the motor housing 64 and keyed in the slot 68 in the side of the nozzle assembly.
- the motor 40 drives a shaft 70 including gear teeth 72 .
- the drive shaft 70 extends through a bearing 74 held in the hub 76 of the planetary gear set carrier 78 .
- a fan 80 is keyed or otherwise secured to the distal end of the drive shaft 70 .
- the planetary gear set carrier 78 includes three stub shafts 82 that each carry a planetary gear 84 .
- Each of the planetary gears 84 include teeth that mesh with the gear teeth 72 of the drive shaft 70 .
- the planetary gears 82 mesh with the teeth of an annular gear 86 that is fixed to the agitator motor housing 64 by pin or other means.
- Planetary gear set carrier 78 also includes a drive ring 88 and associated rubber drive boot 87 which includes a series of spaced channels 89 that receive and engage axial ribs 91 projecting inwardly radially from the inner wall of the agitator 38 a.
- the rubber drive boot 87 provides the necessary damping to insure the smooth transmission of power to the agitator.
- the drive shaft 70 Simultaneously with the rotation of the planetary gear set carrier 78 and agitator 38 , the drive shaft 70 also drives the fan 80 at a ratio of between 4-1 to 10-1 (e.g. 6-1) with respect to the agitator 38 a. The resulting rapid rotation of the fan 80 helps to ensure proper cooling of the agitator motor 40 during its operation.
- the floor cleaning apparatus 10 of the present invention incorporates a novel air cooling system or circuit, which will now be described in detail.
- air is drawn into the floor cleaning apparatus 10 through a vent 90 at the upper rear face of the nozzle assembly 16 by operation of the suction generator 33 (note action arrow A in FIG. 2 ).
- the air first passes through a filter (not shown) of foam rubber or other appropriate material into the illumination compartment 94 defined between the upper transparent window 96 and the lower transparent window 98 which allow viewing of the operation of the agitator 38 a.
- This air then passes over and around the light source 100 so as to provide cooling thereto (note action arrows B in FIG. 2 ).
- the air is drawn through the passageway 102 in the nozzle assembly 16 and around and through an opening 104 in the end cap 52 (note action arrow C).
- the air then moves through the lumen of the agitator 38 a to the fan 80 driven by means of the agitator drive motor 40 (note action arrows D).
- the fan 80 forces the air through openings 106 in the planetary gear set carrier 78 (see also FIG. 3 ) and then around the annular gear 86 before it passes through the housing 64 of the motor 40 (note action arrows E and F).
- Manifold 110 After passing over the windings and other internal components (not shown) of the agitator motor 40 for purposes of heat exchange and cooling, the air passes through the passageway 108 into the manifold 110 (note action arrow G).
- Manifold 110 includes an outlet (not shown) in fluid communication with the agitator cavity 36 .
- the agitator cavity 36 is in direct fluid communication with a suction inlet 44 that leads through the hose 46 into the dirt collection vessel 34 in chamber 32 .
- both agitators 38 a and 38 b have identical structures: that is, each agitator 38 a and 38 b has its own drive motor, only the size of the two differs. As a result, the agitators 38 a and 38 b are independently driven. The agitators 38 a and 38 b may be driven by their individual, independent internal motors in different directions and/or even at different speeds as desired to provide the greatest cleaning efficiency. Thus, design flexibility and performance are all maximized.
- agitators 38 a and 38 b may be independently driven by their own internal drive motors as described above, it should be appreciated that the present invention is not limited to such a drive arrangement. In fact, the present invention covers substantially any floor cleaning apparatus 10 incorporating dual agitators where those agitators have different diameters. Two possible alternative drive arrangements are illustrated schematically in FIGS. 4 and 5 .
- the agitator drive motor 40 is mounted outside the first agitator 38 a but drives the first agitator through a drive belt 112 .
- a power transmission 114 such as a gear box, interconnects the first agitator 38 a with the second agitator 38 b. Accordingly, the motor 40 in this embodiment also drives the second agitator 38 b.
- the two agitators 38 a, 38 b may be driven in different directions and/or at different speeds even though they are both driven by the same drive motor 40 .
- a drive motor 40 mounted within the first agitator 38 a in the manner illustrated in FIGS. 2 and 3 and described in detail above drives the first agitator.
- a power transmission 114 such as a gear box, interconnects the first agitator 38 a and the second agitator 38 b. Accordingly, the drive motor 40 in this embodiment also drives the second agitator 38 b.
- the two agitators 38 a, 38 b may be driven in different directions and/or at different speeds even though they are both driven by the same drive motor 40 .
- the agitators 38 a and 38 b may be driven in the same or opposite directions so as to be co-rotating or counter-rotating. Further, the agitators 38 a and 38 b may be driven at the same or different speeds to provide the most effective and efficient cleaning efficiency. Since the agitators 38 and 38 b are of different diameters and, therefore, present different geometries to the surface being cleaned and since their direction of rotation and speed of rotation may also be varied, overall cleaning performance of the vacuum cleaner may be tuned or customized to provide optimum cleaning efficiency for substantially any form of dirt and debris (e.g. light, heavy, granular, particulate, fine powder, dust, stringy). Accordingly, optimum cleaning performance may be achieved.
- dirt and debris e.g. light, heavy, granular, particulate, fine powder, dust, stringy
Abstract
A floor cleaning apparatus includes a nozzle assembly and a canister assembly. A suction generator and a dirt collection vessel are carried on either the nozzle assembly or the canister assembly. In addition, the apparatus includes first and second agitators. The first agitator has a diameter D1 and the second agitator has a diameter D2. Diameter D1 is greater than diameter D2. Accordingly, the two agitators have different footprints and different cleaning characteristics.
Description
- This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/541,989 filed on Feb. 5, 2004.
- The present invention relates generally to the floor care field and, more particularly, to a floor cleaning apparatus incorporating twin agitators having different diameters.
- A vacuum cleaner is an electromechanical appliance utilized to effect the dry removal of dust, dirt and other small debris from carpets, rugs, fabrics or other surfaces in both domestic and industrial environments. In order to achieve the desired dirt and dust removal, a rotary agitator is provided to beat dirt and dust from the nap of the carpet and a pressure drop or vacuum is used to force air entrained with this dirt and dust into the nozzle of the vacuum cleaner. The particulate-laden air is then drawn through a bag-like filter, a dirt cup or a cyclonic separation chamber and filter combination which traps the dirt and dust, while substantially clean air is exhausted by an electrically operated fan that is driven by an on board motor. It is this fan and motor arrangement that generates the drop in air pressure necessary to provide the desired cleaning action. Thus, the fan and motor arrangement is commonly known as the vacuum or suction generator.
- Many advanced, high performance vacuum cleaners incorporate a dual motor system. In such a system, a separate agitator drive motor is provided in addition to the motor of the suction generator. In most designs the separate agitator drive motor is mounted on the nozzle assembly adjacent the agitator. A gear drive or more commonly a pulley and belt arrangement transmits the power from the agitator motor drive shaft to the agitator.
- It has also been determined that vacuum cleaners equipped with multiple agitators provide a performance advantage resulting in enhanced cleaning efficiency. The present invention relates to a multi-agitator floor cleaning apparatus such as an upright vacuum cleaner, canister vacuum cleaner, hand-held vacuum cleaner or extractor wherein the agitators are of different diameters. Such a floor cleaning apparatus provides maximum cleaning performance while also limiting the height of the nozzle assembly. As a consequence, the vacuum cleaner is easy to maneuver and has a relatively low profile so as to allow cleaning under beds, chairs and the like.
- In accordance with the purposes of the present invention as described herein, an improved floor cleaning apparatus is provided. That floor cleaning apparatus comprises a nozzle assembly, a canister assembly and a suction generator carried on one of the nozzle assembly and the canister assembly. Additionally, the floor cleaning apparatus includes a dirt collection vessel also carried on one of the canister assembly and the nozzle assembly. Still further, a first agitator having a first diameter D1 is carried on the nozzle assembly. Additionally, a second agitator having a second diameter D2 is carried on the nozzle assembly. The first diameter D1 is greater than the second diameter D2. At least one agitator drive motor is carried on either the nozzle assembly or the canister assembly to drive the first and second agitators.
- The canister assembly may be pivotally connected to the nozzle assembly. Further, the dirt collection vessel may take any of various forms including but not limited to a filter bag, a dirt cup and a cyclonic airflow chamber. Further, the cleaning apparatus itself may be a device selected from a group consisting of an upright vacuum cleaner, a canister vacuum cleaner, a hand-held vacuum cleaner and an extractor.
- In a typical embodiment, the second agitator diameter D2 is between about 75 and about 90 percent of the first agitator diameter D1. More specifically, the first diameter D1 is between about 50 mm and about 63 mm while the second diameter D2 is between about 37 mm and about 57 mm.
- In accordance with yet another aspect of the present invention, a method is disclosed for providing an improved floor cleaning apparatus. The method includes the steps of equipping the floor cleaning apparatus with a first agitator having a diameter D1 and a second agitator having a diameter D2, where D1 is greater than D2, and driving those two agitators. The agitators may be driven at different speeds and/or in different directions.
- Advantageously, the floor cleaning apparatus provides enhanced cleaning performance and a relatively low profile and compact nozzle assembly that is easily maneuvered over a surface to be cleaned and has the necessary clearance to be used under beds, chairs and the like.
- In the following description there is shown and described a preferred embodiment of this invention, simply by way of illustration of one of the modes best suited to carry out the invention. As it will be realized, the invention is capable of other different embodiments and its several details are capable of modification in various, obvious aspects all without departing from the invention. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
- The accompanying drawing incorporated in and forming a part of the specification, illustrates several aspects of the present invention, and together with the description serves to explain certain principles of the invention. In the drawing:
-
FIG. 1 is a perspective view of a floor cleaning apparatus of the present invention, illustrated in the form of an upright vacuum cleaner; -
FIG. 2 is a transverse sectional view of the vacuum cleaner through the first agitator; -
FIG. 3 is a detailed cross-sectional view of the first agitator and gear drive showing the engagement therebetween; -
FIG. 4 is a schematical representation of a first alternative agitator drive arrangement; and -
FIG. 5 is a schematical representation of a second alternative drive arrangement. - Reference will now be made in detail to the present preferred embodiment of the invention, an example of which is illustrated in the accompanying drawing.
- Reference is now made to
FIG. 1 showing afloor cleaning apparatus 10 of the present invention. As illustrated, thatfloor cleaning apparatus 10 takes the form of an upright vacuum cleaner. It should be appreciated, however, that thefloor cleaning apparatus 10 may also take the form of a canister vacuum cleaner, a hand-held vacuum cleaner or even an extractor. - The overall basic design of the
floor cleaning apparatus 10 is generally well known in the art. In the typical arrangement, thefloor cleaning apparatus 10 includes ahousing 14 that comprises thenozzle assembly 16 and thecanister assembly 18. Thecanister assembly 18 further includes thehandle 20 and thehand grip 22. Thehand grip 22 carries acontrol switch 24 for turning thefloor cleaning apparatus 10 on and off. Of course, electrical power is supplied to thefloor cleaning apparatus 10 from a standard electrical wall outlet through a cord (not shown). Alternatively, thefloor cleaning apparatus 10 could be powered by an onboard battery. - At the lower portion of the
canister assembly 18, rear wheels (not shown) are provided to support the weight of thefloor cleaning apparatus 10. A second set of wheels (also not shown) allow the operator to raise and lower thenozzle assembly 16 through selective manipulation of theheight adjustment switch 28. Such a height adjustment mechanism is well known in the art and is exemplified, for example, by the arrangement incorporated into the Kenmore Progressive vacuum cleaner currently available in the marketplace. To allow for convenient storage of thefloor cleaning apparatus 10, afoot latch 30 functions to lock thecanister assembly 18 in an upright position, as shown inFIG. 1 . When thefoot latch 30 is released, thecanister assembly 18 may be pivoted relative to thenozzle assembly 16 as thefloor cleaning apparatus 10 is manipulated to clean the floor. - The
canister assembly 18 also carries aninternal chamber 32 that houses a suction generator 33 (i.e. a state of the art fan and motor combination) and adirt collection vessel 34 for removing dirt or dust entrained in the air stream as it passes from thenozzle assembly 16 to the suction generator. Thecanister assembly 18 may also carry afinal filtration cartridge 48 to trap small particulates and prevent their reintroduction into the environment through the exhaust air stream. - The
nozzle assembly 16 includes a nozzle andagitator cavity 36 that houses afirst agitator 38 a and asecond agitator 38 b mounted in parallel so as to substantially form a nip or slight gap N therebetween. In accordance with a novel aspect of the present invention, the twoagitators first agitator 38 a has a first diameter D1 of between about 50 to about 63 mm. In contrast, thesecond agitator 38 b has a diameter D2 of between about 37 to about 57 mm. Thus, thesecond agitator 38 b has a diameter D2 of between about 75 to about 90 percent of the diameter D1 of thefirst agitator 38 a. - The different diameters of the
agitator agitators agitators forward agitator 38 b allows the housing of thenozzle assembly 16 to be constructed with a lower overall forward profile. The lower clearance allows thenozzle assembly 16 to be freely maneuvered under low clearance overhangs such as commonly associated with beds, chairs, kitchen and bathroom cabinets and the like. - The
agitators motor 40 and cooperating gear drive 42 housed within the agitator and described in greater detail below (seeFIGS. 2 and 3 ). In the illustratedfloor cleaning apparatus 10, the scrubbing action of therotary agitators suction generator 33 cooperate to brush and beat dirt and dust from the nap of the carpet being cleaned and then draw the dirt and dust laden air from theagitator cavity 36 to thedirt collection vessel 34. Specifically, the dirt and dust laden air passes serially through a suction inlet and hose and/or an integrally molded conduit in thenozzle assembly 16 and/orcanister assembly 18 as is known in the art. Next, it is delivered into thedirt collection vessel 34 held in thechamber 32. Thevessel 34 serves to trap the suspended dirt, dust and other particles inside while allowing the now clean air to pass freely through the porous wall thereof and then through thesuction generator 33,final filtration cartridge 48 and ultimately to the environment through theexhaust port 50. - As illustrated, the
dirt collection vessel 34 takes the form of a dust or filter bag of a type well known in the art. Of course, it should be appreciated that the dirt collection vessel could also be a dirt cup or even a cyclonic separation chamber if desired. Essentially substantially any vessel capable of collecting dirt may be utilized. - Reference is now made to
FIGS. 2 and 3 which show the mounting of theagitator motor 40 and associated gear drive 42 in one of theagitators 38 a in detail. As shown, theagitator 38 a is mounted for rotation relative to thenozzle assembly 16. Specifically, a first end of theagitator 38 a includes anend cap 52 which is supported onbearings 54 on astub shaft 55 held in mountingblock 56 keyed intoslot 58 in the side of thenozzle assembly 16. Anend cap 60 at the opposite end of theagitator 38 a is supported onbearings 62 mounted on thehousing 64 of themotor 40. As should be appreciated, themotor 40 is fixed to thenozzle assembly 16 by means of the mountingblock 66 fixed to themotor housing 64 and keyed in theslot 68 in the side of the nozzle assembly. - The
motor 40 drives ashaft 70 includinggear teeth 72. Thedrive shaft 70 extends through abearing 74 held in thehub 76 of the planetary gear setcarrier 78. In the most preferred embodiment afan 80 is keyed or otherwise secured to the distal end of thedrive shaft 70. - The planetary gear set
carrier 78 includes threestub shafts 82 that each carry aplanetary gear 84. Each of theplanetary gears 84 include teeth that mesh with thegear teeth 72 of thedrive shaft 70. Additionally, theplanetary gears 82 mesh with the teeth of anannular gear 86 that is fixed to theagitator motor housing 64 by pin or other means. Thus, it should be appreciated that as thedrive shaft 70 is driven by themotor 40, theplanetary gears 84 are driven around theannular gear 86, thereby causing the planetary gear setcarrier 78 to rotate. Planetary gear setcarrier 78 also includes adrive ring 88 and associatedrubber drive boot 87 which includes a series of spacedchannels 89 that receive and engageaxial ribs 91 projecting inwardly radially from the inner wall of theagitator 38 a. Thus, the rotation of the planetary gear setcarrier 78 is transmitted by thedrive ring 88 and driveboot 87 directly to and causes like rotation of theagitator 38 a. Therubber drive boot 87 provides the necessary damping to insure the smooth transmission of power to the agitator. Simultaneously with the rotation of the planetary gear setcarrier 78 andagitator 38, thedrive shaft 70 also drives thefan 80 at a ratio of between 4-1 to 10-1 (e.g. 6-1) with respect to theagitator 38 a. The resulting rapid rotation of thefan 80 helps to ensure proper cooling of theagitator motor 40 during its operation. - More specifically, the
floor cleaning apparatus 10 of the present invention incorporates a novel air cooling system or circuit, which will now be described in detail. Specifically, air is drawn into thefloor cleaning apparatus 10 through a vent 90 at the upper rear face of thenozzle assembly 16 by operation of the suction generator 33 (note action arrow A inFIG. 2 ). Specifically, the air first passes through a filter (not shown) of foam rubber or other appropriate material into theillumination compartment 94 defined between the uppertransparent window 96 and the lowertransparent window 98 which allow viewing of the operation of theagitator 38 a. This air then passes over and around thelight source 100 so as to provide cooling thereto (note action arrows B inFIG. 2 ). Next, the air is drawn through thepassageway 102 in thenozzle assembly 16 and around and through anopening 104 in the end cap 52 (note action arrow C). The air then moves through the lumen of theagitator 38 a to thefan 80 driven by means of the agitator drive motor 40 (note action arrows D). Thefan 80 forces the air throughopenings 106 in the planetary gear set carrier 78 (see alsoFIG. 3 ) and then around theannular gear 86 before it passes through thehousing 64 of the motor 40 (note action arrows E and F). - After passing over the windings and other internal components (not shown) of the
agitator motor 40 for purposes of heat exchange and cooling, the air passes through thepassageway 108 into the manifold 110 (note action arrow G).Manifold 110 includes an outlet (not shown) in fluid communication with theagitator cavity 36. Of course, as noted above, theagitator cavity 36 is in direct fluid communication with a suction inlet 44 that leads through the hose 46 into thedirt collection vessel 34 inchamber 32. - While only one
agitator 38 a has been illustrated and described in detail, it should be appreciated that bothagitators agitator agitators agitators - While the
agitators floor cleaning apparatus 10 incorporating dual agitators where those agitators have different diameters. Two possible alternative drive arrangements are illustrated schematically inFIGS. 4 and 5 . - In the
FIG. 4 embodiment, theagitator drive motor 40 is mounted outside thefirst agitator 38 a but drives the first agitator through adrive belt 112. Apower transmission 114, such as a gear box, interconnects thefirst agitator 38 a with thesecond agitator 38 b. Accordingly, themotor 40 in this embodiment also drives thesecond agitator 38 b. Of course, by careful selection and arrangement of gears in the gear box, the twoagitators same drive motor 40. - In the
FIG. 5 embodiment, adrive motor 40 mounted within thefirst agitator 38 a in the manner illustrated inFIGS. 2 and 3 and described in detail above drives the first agitator. Apower transmission 114, such as a gear box, interconnects thefirst agitator 38 a and thesecond agitator 38 b. Accordingly, thedrive motor 40 in this embodiment also drives thesecond agitator 38 b. Again, as noted above, by careful selection and arrangement of gears in the gear box, the twoagitators same drive motor 40. - In summary, in any of the possible embodiments, it should be appreciated that the
agitators agitators agitators - The foregoing description of a preferred embodiment of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings.
- The embodiment was chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled. The drawings and preferred embodiment do not and are not intended to limit the ordinary meaning of the claims and their fair and broad interpretation in any way.
Claims (19)
1. A floor cleaning apparatus, comprising:
a nozzle assembly;
a canister assembly;
a suction generator carried on one of said nozzle assembly and said canister assembly;
a dirt collection vessel carried on one of said canister assembly and said nozzle assembly;
a first agitator having a first diameter D1;
a second agitator having a second diameter D2 where D1>D2; and
at least one agitator drive motor carried on one of said nozzle assembly and said canister assembly.
2. The floor cleaning apparatus of claim 1 , wherein said canister assembly is pivotally connected to said nozzle assembly.
3. The floor cleaning apparatus of claim 1 , wherein said dirt collection vessel is a filter bag.
4. The floor cleaning apparatus of claim 1 , wherein said dirt collection vessel is a dirt cup.
5. The floor cleaning apparatus of claim 1 , wherein said dirt collection vessel is a cyclonic airflow chamber.
6. The floor cleaning apparatus of claim 1 , wherein said floor cleaning apparatus is a device selected from a group consisting of an upright vacuum cleaner, a canister vacuum cleaner, a hand-held vacuum cleaner and an extractor.
7. The floor cleaning apparatus of claim 1 , wherein D2 is between approximately 75 and 90 percent of D1.
8. The floor cleaning apparatus of claim 1 , wherein D1 is between about 50 mm to about 63 mm.
9. The floor cleaning apparatus of claim 8 , wherein D2 is between about 37 mm to about 57 mm.
10. The floor cleaning apparatus of claim 1 , wherein D2 is between about 37 mm to about 57 mm.
11. The floor cleaning apparatus of claim 1 , wherein said at least one agitator drive motor is positioned inside said first agitator.
12. The floor cleaning apparatus of claim 11 , further including a second agitator drive motor positioned inside said second agitator.
13. The floor cleaning apparatus of claim 1 , wherein said at least one agitator drive motor is positioned inside said second agitator.
14. A method of providing an improved floor cleaning apparatus, comprising:
equipping said floor cleaning apparatus with a first agitator having a first diameter D1 and a second agitator having a second diameter D2 where D1>D2; and
driving said first and second agitators.
15. The method of claim 14 including driving said first and second agitators at different speeds.
16. The method of claim 15 , including driving said first and second agitators in different directions.
17. The method of claim 14 , including driving said first and second agitators in different directions.
18. The method of claim 14 further including positioning an agitator drive motor in one of said first agitator and said second agitator.
19. The method of claim 14 further including positioning a first agitator drive motor in said first agitator and a second agitator drive motor in said second agitator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/051,778 US20050172447A1 (en) | 2004-02-05 | 2005-02-04 | Floor cleaning apparatus with twin agitators having different diameters |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US54198904P | 2004-02-05 | 2004-02-05 | |
US11/051,778 US20050172447A1 (en) | 2004-02-05 | 2005-02-04 | Floor cleaning apparatus with twin agitators having different diameters |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050172447A1 true US20050172447A1 (en) | 2005-08-11 |
Family
ID=34885957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/051,778 Abandoned US20050172447A1 (en) | 2004-02-05 | 2005-02-04 | Floor cleaning apparatus with twin agitators having different diameters |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050172447A1 (en) |
CA (1) | CA2496334A1 (en) |
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WO2018117768A1 (en) * | 2016-12-23 | 2018-06-28 | 엘지전자 주식회사 | Nozzle for cleaner |
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US10213077B2 (en) | 2014-03-19 | 2019-02-26 | Dyson Technology Limited | Cleaner head |
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US20220248921A1 (en) * | 2019-06-07 | 2022-08-11 | Mitsubishi Electric Corporation | Cleaner head and vacuum cleaner |
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Legal Events
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AS | Assignment |
Owner name: PANASONIC CORPORATION OF NORTH AMERICA, NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RONEY, JEFFREY T.;YACOBI, MICHAEL S.;FEDORKA, THOMAS J.;AND OTHERS;REEL/FRAME:016259/0263 Effective date: 20050124 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |