US20060091341A1 - Switch mechanism for a pneumatic tool - Google Patents
Switch mechanism for a pneumatic tool Download PDFInfo
- Publication number
- US20060091341A1 US20060091341A1 US10/978,062 US97806204A US2006091341A1 US 20060091341 A1 US20060091341 A1 US 20060091341A1 US 97806204 A US97806204 A US 97806204A US 2006091341 A1 US2006091341 A1 US 2006091341A1
- Authority
- US
- United States
- Prior art keywords
- choke
- pneumatic tool
- switch mechanism
- air passage
- base body
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Power Tools In General (AREA)
Abstract
Description
- 1. Field of the Invention
- This invention relates to a pneumatic tool, and more particularly to a switch mechanism for a pneumatic tool.
- 2. Description of the Prior Arts
- All pneumatic tools are equipped with a switch mechanism that is actuated by trigger to allow the air enter the inside of the pneumatic tool to perform pneumatic operation. The switch mechanism is an indispensable part of the pneumatic tool, which has many different structural forms. The motivation of the present invention is to develop a switch mechanism that will not damage the base body of the pneumatic tool, and part of the switch mechanism is easy to be replaced after it is worn or broken.
- As shown in
FIGS. 1 and 2 , a conventional switch mechanism for a pneumatic tool generally includes achoke ring 12, acontrol rod 13 and achoke member 14. Thechoke ring 12 is fixed in anair passage 11 of abase body 10 of the pneumatic tool, and anair hole 121 is formed at the center of thechoke ring 12. Thecontrol rod 13 is swayably inserted through theair hole 121 of thechoke ring 12 with a first end of thecontrol rod 13 corresponds to atrigger 15 of the pneumatic tool and a first end of which is inserted in achoke member 14. Thechoke member 14 is provided around the outer periphery thereof with achoke portion 141 that is pushed by aspring 16 and to seal thechoke ring 12. When the pneumatic tool is in use, thechoke portion 141 of thechoke member 14 is pushed by thespring 16 to seal theair hole 121 of thechoke ring 12, so that the air in theair passage 11 of thebase body 10 is unable to enter the inside of the base boy via theair hole 121 of thechoke ring 12. As shown inFIG. 3 , if the user presses thetrigger 15, thecontrol rod 13 will be pushed by thetrigger 15 to sway an angle and thechoke portion 141 of the choke member 1 will disengage from theair hole 121 of thechoke ring 12. At this moment, air is allowed to enter the base body through theair hole 121 of thechoke ring 12. This conventional switch mechanism still has some disadvantages that are explained as follows: - First, in operation, the
trigger 15 pushes thecontrol rod 13 to make it sway an angle and synchronously make thechoke member 14 sway an angle too. Since there is no any component arranged between thechoke member 14 and thechoke ring 12, and between thechoke member 14 and the inner wall of theair passage 11 of thebase body 10. Thechoke portion 141 of thechoke member 14 directly contacts thechoke ring 12 and theair passage 11 of thebase body 10. After a certain time of use, thechoke ring 12 and the inner wall of theair passage 11 of thebase body 10 will be worn or broken due to different hardness of the respective components. - Second, once the
choke ring 12 is worn or broken, not only thechoke ring 12 and thechoke member 14 will lose their air-tightness, but also thechoke ring 12 will be difficult to be replaced since it is preset in theair passage 11 of thebase body 10. - The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional switch of a pneumatic tool.
- The primary object of the present invention is to provide a switch mechanism for a pneumatic tool which is capable of preventing abrasion and broken of the inner wall of the air passage of the base body and the choke ring.
- The secondary object of the present invention is to provide a switch mechanism for a pneumatic tool that can enable the user to replace the worn or broke component of the switch mechanism with ease.
- A switch mechanism for a pneumatic tool in accordance with the present invention comprises:
- A choke ring is disposed in an air passage of the pneumatic took and at a center of the choke ring is formed an air hole;
- A control rod is swayably inserted through the air hole of the choke ring in a manner that a first end of the control rod corresponds to a trigger of the pneumatic tool;
- A choke member is provided for insertion of a second end of the control rod and pushed by a spring to seal the choke ring with an end surface.
- The characteristic of the present invention is that in the air passage of the base body is disposed a bushing which is located in between the choke member and the inner wall of the air passage of the base body and between the choke member and the choke ring. By such arrangement, the inner wall of the air passage of the base body and the choke ring can be avoided from being abraded by the choke member.
- The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
-
FIG. 1 is an assembly cross sectional view of a conventional switch mechanism for a pneumatic tool; -
FIG. 2 is a partial amplified view ofFIG. 1 ; -
FIG. 3 is an operational view of the conventional switch mechanism for a pneumatic tool ofFIG. 1 ; -
FIG. 4 is an exploded view of a switch mechanism for a pneumatic tool in accordance with the present invention; -
FIG. 5 is an assembly cross sectional view of the switch mechanism for a pneumatic tool in accordance with the present invention; -
FIG. 6 is a partial amplified view ofFIG. 5 ; -
FIG. 7 is an operational view of the switch mechanism for a pneumatic tool in accordance with the present invention. - Referring to
FIGS. 4-6 , a switch mechanism in accordance with one aspect of the present invention is shown and generally comprises: achoke ring 30, acontrol rod 40, achoke member 50 and abushing 60. The switch mechanism is disposed in abase body 20 of a pneumatic tool. - The
choke ring 30 is formed with acentral air hole 31 and disposed inside anair passage 21 of thebase body 20. It is to be noted that anannular protrusion 32 is formed downward about the periphery of theair hole 31. - The
control rod 40 is swayably inserted through theair hole 31 of thechoke ring 30 in a manner that a first end of thecontrol rod 40 corresponds to atrigger 22 of thebase body 20. - The
choke member 50 is provided for insertion of a second end of thecontrol rod 40, and about the periphery of thechoke member 50 is formed with achoke portion 51. Aspring 52 is used to push against alower end surface 511 of thechoke portion 51, so that anupper end surface 511 of thechoke 51 is pushed to seal theair hole 31 of thechoke ring 30. - The specialty of the present invention is that in the
air passage 21 of thebase body 20 is installed with a metal-madebushing 60 whose hardness is greater than the hardness of thechoke member 50. Thebushing 60 has anannular abutting portion 61 and anannular shoulder portion 62 located at an end of theannular abutting portion 61. Theannular abutting portion 61 is used to abut against the inner wall of theair passage 21 of thebase body 20 and located between the inner wall of theair passage 21 and annular periphery 513 of thechoke portion 51 of thechoke member 50. Theannular shoulder portion 62 is located between theupper end surface 511 of thechoke portion 51 of thechoke member 50 and alower end surface 33 of thechoke ring 30. The inner periphery of theannular shoulder portion 62 is abutted by theannular protrusion 32 of thechoke ring 30, so that thelower end 321 of theannular shoulder 32 of thechoke ring 30 is able to closely abut against theupper end surface 511 of thechoke member 51 of thechoke member 50. - Referring to
FIG. 7 , when the switch mechanism is in use, the user can press thetrigger 22 on thebase body 20, such that thecontrol rod 40 is moved to swing an angle by thetrigger 22 and synchronously enables thechoke portion 51 of thechoke member 50 to disengage from theannular protrusion 32 and theair hole 31 of thechoke ring 30. At this moment, air is allowed to enter thebase body 20 for pneumatic operation via theair hole 31 of thechoke member 30. In addition, thecontrol rod 40 also enables thechoke member 50 to swing an angle when being pushed by thetrigger 22. Since thebushing 60 is disposed between thechoke member 50 and thebase body 20, and between thechoke member 50 and thechoke ring 30. After thechoke member 50 swings an angle, thechoke portion 51 of which will press against theannular abutting portion 61 and theannular shoulder portion 62 of the bushing 60 instead of pressing directly against the inner wall of theair passage 21 of thebase body 20 and thechoke ring 30. Thereby, the inner wall of theair passage 21 of thebase body 20 and thechoke ring 30 can be avoided from abrasion or broken. - Furthermore, the hardness of the
bushing 60 is greater than that of thechoke member 50, thechoke portion 51 of thechoke member 50 will be worn after long time of abutting against the bushing 60. However, thechoke member 50 is positioned inside theair passage 21 of thebase body 20 by thespring 52, and thespring 52 is detachably disposed in theair passage 21 of thebase body 20. In this case, it is easy for user to replace thechoke member 50 after it is worn or broken. - While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/978,062 US7032881B1 (en) | 2004-10-28 | 2004-10-28 | Switch mechanism for a pneumatic tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/978,062 US7032881B1 (en) | 2004-10-28 | 2004-10-28 | Switch mechanism for a pneumatic tool |
Publications (2)
Publication Number | Publication Date |
---|---|
US7032881B1 US7032881B1 (en) | 2006-04-25 |
US20060091341A1 true US20060091341A1 (en) | 2006-05-04 |
Family
ID=36190892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/978,062 Active US7032881B1 (en) | 2004-10-28 | 2004-10-28 | Switch mechanism for a pneumatic tool |
Country Status (1)
Country | Link |
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US (1) | US7032881B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI266679B (en) * | 2005-06-29 | 2006-11-21 | Basso Ind Corp | Improved mechanism of switching position for user by right or left hand about CW-CCW valve in a pneumatic tool |
US7445055B2 (en) * | 2006-11-03 | 2008-11-04 | Snap-On Incorporated | Trigger-actuated tip-type air valve with integrated wear surface |
DE102009012267B4 (en) * | 2008-03-11 | 2013-10-10 | Tkr Spezialwerkzeuge Gmbh | Filling system for automotive air conditioning systems |
TWI393616B (en) * | 2011-06-02 | 2013-04-21 | Tranmax Machinery Co Ltd | Used for pneumatic tools |
TW201309430A (en) * | 2011-08-26 | 2013-03-01 | Storm Pneumatic Tool Co Ltd | Improved normal/reverse turning control device of pneumatic tool |
TWI572802B (en) * | 2014-09-03 | 2017-03-01 | 力肯實業股份有限公司 | Novel valve device |
Citations (25)
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US2362608A (en) * | 1942-11-10 | 1944-11-14 | Ingersoll Rand Co | Adjusting device for throttle valves |
US3443646A (en) * | 1967-03-16 | 1969-05-13 | Gardner Denver Co | Housing for tool mechanism |
US4113080A (en) * | 1976-05-13 | 1978-09-12 | Rockwell International Corporation | Torque wrench air shut-off |
US4258799A (en) * | 1979-11-27 | 1981-03-31 | Dresser Industries, Inc. | Inlet control valve |
US4462282A (en) * | 1982-11-15 | 1984-07-31 | Dresser Industries, Inc. | Power tool with torque reaction bar |
US4484871A (en) * | 1981-11-23 | 1984-11-27 | Atlas Copco Aktiebolag | Torque delivering tool with dual motor drive |
US4485698A (en) * | 1981-11-23 | 1984-12-04 | Atlas Copco Aktiebolag | Torque delivering tool with torque reaction support |
US4522269A (en) * | 1981-11-23 | 1985-06-11 | Atlas Copco Aktiebolag | Dual motor torque delivering tool |
US4631012A (en) * | 1982-09-29 | 1986-12-23 | Dresser Industries, Inc. | Pneumatic tools |
US4778015A (en) * | 1985-12-23 | 1988-10-18 | Atlas Copco Aktiebolag | Pneumatic power wrench |
US5083619A (en) * | 1989-09-25 | 1992-01-28 | Chicago Pneumatic Tool Company | Powered impact wrench |
US5205540A (en) * | 1992-03-16 | 1993-04-27 | Ingersoll-Rand Company | Trigger valve assembly |
US5346024A (en) * | 1992-06-22 | 1994-09-13 | Ingersoll-Rand Company | Tool construction |
US5439332A (en) * | 1993-06-11 | 1995-08-08 | Spitznagel; Max W. A. | Pneumatic spot weld drill |
US5531279A (en) * | 1994-04-12 | 1996-07-02 | Indresco Inc. | Sensor impulse unit |
US5544710A (en) * | 1994-06-20 | 1996-08-13 | Chicago Pneumatic Tool Company | Pulse tool |
US5788219A (en) * | 1995-06-29 | 1998-08-04 | Nakajima; Saburo | Throttle valve for an air tool |
US5913370A (en) * | 1996-11-19 | 1999-06-22 | Etablissements Charles Maire | Pneumatic or pressurized fluid tool having a control device |
US5918686A (en) * | 1997-06-24 | 1999-07-06 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US5992539A (en) * | 1999-03-16 | 1999-11-30 | Lin; Chen-Yang | Pneumatically driven power tool |
US6027099A (en) * | 1998-03-20 | 2000-02-22 | Snap-On Tools Company | Tip valve for pneumatic tool |
US6443239B1 (en) * | 2000-02-29 | 2002-09-03 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6796386B2 (en) * | 2000-09-08 | 2004-09-28 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6880645B2 (en) * | 2002-06-14 | 2005-04-19 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6935437B2 (en) * | 2002-09-12 | 2005-08-30 | Kabushiki Kaisha Shinano Seisakusho | Air drill |
-
2004
- 2004-10-28 US US10/978,062 patent/US7032881B1/en active Active
Patent Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2362608A (en) * | 1942-11-10 | 1944-11-14 | Ingersoll Rand Co | Adjusting device for throttle valves |
US3443646A (en) * | 1967-03-16 | 1969-05-13 | Gardner Denver Co | Housing for tool mechanism |
US4113080A (en) * | 1976-05-13 | 1978-09-12 | Rockwell International Corporation | Torque wrench air shut-off |
US4258799A (en) * | 1979-11-27 | 1981-03-31 | Dresser Industries, Inc. | Inlet control valve |
US4484871A (en) * | 1981-11-23 | 1984-11-27 | Atlas Copco Aktiebolag | Torque delivering tool with dual motor drive |
US4485698A (en) * | 1981-11-23 | 1984-12-04 | Atlas Copco Aktiebolag | Torque delivering tool with torque reaction support |
US4522269A (en) * | 1981-11-23 | 1985-06-11 | Atlas Copco Aktiebolag | Dual motor torque delivering tool |
US4631012A (en) * | 1982-09-29 | 1986-12-23 | Dresser Industries, Inc. | Pneumatic tools |
US4462282A (en) * | 1982-11-15 | 1984-07-31 | Dresser Industries, Inc. | Power tool with torque reaction bar |
US4778015A (en) * | 1985-12-23 | 1988-10-18 | Atlas Copco Aktiebolag | Pneumatic power wrench |
US5083619A (en) * | 1989-09-25 | 1992-01-28 | Chicago Pneumatic Tool Company | Powered impact wrench |
US5205540A (en) * | 1992-03-16 | 1993-04-27 | Ingersoll-Rand Company | Trigger valve assembly |
US5346024A (en) * | 1992-06-22 | 1994-09-13 | Ingersoll-Rand Company | Tool construction |
US5439332A (en) * | 1993-06-11 | 1995-08-08 | Spitznagel; Max W. A. | Pneumatic spot weld drill |
US5531279A (en) * | 1994-04-12 | 1996-07-02 | Indresco Inc. | Sensor impulse unit |
US5544710A (en) * | 1994-06-20 | 1996-08-13 | Chicago Pneumatic Tool Company | Pulse tool |
US5788219A (en) * | 1995-06-29 | 1998-08-04 | Nakajima; Saburo | Throttle valve for an air tool |
US5913370A (en) * | 1996-11-19 | 1999-06-22 | Etablissements Charles Maire | Pneumatic or pressurized fluid tool having a control device |
US5918686A (en) * | 1997-06-24 | 1999-07-06 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6027099A (en) * | 1998-03-20 | 2000-02-22 | Snap-On Tools Company | Tip valve for pneumatic tool |
US5992539A (en) * | 1999-03-16 | 1999-11-30 | Lin; Chen-Yang | Pneumatically driven power tool |
US6443239B1 (en) * | 2000-02-29 | 2002-09-03 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6796386B2 (en) * | 2000-09-08 | 2004-09-28 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6880645B2 (en) * | 2002-06-14 | 2005-04-19 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
US6935437B2 (en) * | 2002-09-12 | 2005-08-30 | Kabushiki Kaisha Shinano Seisakusho | Air drill |
Also Published As
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US7032881B1 (en) | 2006-04-25 |
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Owner name: BASSO INDUSTRY CORP., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHIANG, HUA;REEL/FRAME:015951/0958 Effective date: 20041025 |
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