IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0991238
(2004-11-16)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Knobbe Martens Olson &
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인용정보 |
피인용 횟수 :
16 인용 특허 :
8 |
초록
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A pneumatic tool includes a housing, a driving mechanism, a rear cap, a direction controller, a speed controller, and an operating member. The housing is formed with a component chamber and an intake passageway. The driving mechanism includes an output shaft rotatable about a rotary axis. The rear c
A pneumatic tool includes a housing, a driving mechanism, a rear cap, a direction controller, a speed controller, and an operating member. The housing is formed with a component chamber and an intake passageway. The driving mechanism includes an output shaft rotatable about a rotary axis. The rear cap defines a cap chamber in spatial communication with the component chamber, and has a connecting passageway that intercommunicates the cap chamber and the intake passageway. The direction controller and the speed controller are mounted in the cap chamber for rotation about the rotary axis. The operating member is coupled to the direction controller, is accessible externally of the rear cap and the housing, and is operable to drive rotation of the direction controller about the rotary axis, thereby controlling direction of rotation of the output shaft. The speed controller is operable to vary torque and speed of the output shaft.
대표청구항
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I claim: 1. A pneumatic tool comprising: a housing formed with a component chamber and an intake passageway, said component chamber having a rear end; a driving mechanism mounted in said component chamber and including a rear bearing member disposed proximate to said rear end of said component cham
I claim: 1. A pneumatic tool comprising: a housing formed with a component chamber and an intake passageway, said component chamber having a rear end; a driving mechanism mounted in said component chamber and including a rear bearing member disposed proximate to said rear end of said component chamber and having a rear side, an air cylinder device disposed in front of said rear bearing member and formed with a cylinder chamber, and an output shaft coupled to said air cylinder device for rotation about a rotary axis, said rear bearing member being formed with a first forward hole and a first reverse hole that are in spatial communication with said cylinder chamber; a rear cap having a peripheral wall coupled to said housing at said rear end of said component chamber, said peripheral wall defining a cap chamber that is in spatial communication with said component chamber, said rear cap being formed with a connecting passageway that intercommunicates said cap chamber and said intake passageway; a direction controller mounted in said cap chamber and rotatable about said rotary axis, said direction controller including a base wall transverse to said rotary axis, and first and second abutment posts that project from said base wall and that are disposed to abut against said rear side of said rear bearing member, said direction controller having a second forward hole formed through said base wall and said first abutment post, and a second reverse hole formed through said base wall and said second abutment post; a speed controller mounted in said cap chamber and rotatable about said rotary axis, said speed controller including a ring wall formed with a forward speed regulator and a reverse speed regulator, and an operating part that extends from said ring wall in a direction away from said component chamber and that is accessible externally of said rear cap and said housing; and an operating member coupled to said direction controller and accessible externally of said rear cap and said housing; said operating member being operable to drive rotation of said direction controller about said rotary axis for aligning said first and second forward holes such that air for driving forward rotation of said output shaft is able to flow into said cylinder chamber via a first flow path that includes said intake passageway, said connecting passageway, said forward speed regulator, and said first and second forward holes; said operating member being further operable to drive rotation of said direction controller about said rotary axis for aligning said first and second reverse holes such that air for driving reverse rotation of said output shaft is able to flow into said cylinder chamber via a second flow path that includes said intake passageway, said connecting passageway, said reverse speed regulator, and said first and second reverse holes; said operating part of said speed controller being operable to vary extent of overlap between one of said forward and reverse speed regulators and a corresponding one of said second forward and reverse holes for regulating amount of air flow through one of said first and second flow paths, thereby varying torque and speed of said output shaft accordingly. 2. The pneumatic tool as claimed in claim 1, wherein said operating part of said speed controller includes a stub that projects rearwardly from said ring wall, and a handle that is disposed at one end of said stub remote from said ring wall and that extends along a diametric line with respect to said rotary axis. 3. The pneumatic tool as claimed in claim 2, wherein said direction controller further includes a coupling stub that projects from said base wall away from said rear side of said rear bearing member, said operating member having a coupling portion fastened to said coupling stub, and an operating portion extending from said coupling portion and disposed radially relative to said rotary axis. 4. The pneumatic tool as claimed in claim 3, wherein said coupling portion has a spline engagement with said coupling stub. 5. The pneumatic tool as claimed in claim 3, wherein said direction controller further includes a screw fastener for fastening said coupling portion to said coupling stub. 6. The pneumatic tool as claimed in claim 3, wherein said stub is tubular and includes upper and lower wall sections disposed on opposite sides of said handle, said lower wall section having a length along said rotary axis that is shorter than a length of said upper wall section along said rotary axis, said coupling portion of said operating member being disposed rearwardly of said lower wall section of said stub. 7. The pneumatic tool as claimed in claim 6, wherein said upper wall section of said stub has an outer surface formed with a set of angularly spaced apart positioning cavities, said rear cap further including a spring-biased ball for engaging one of said positioning cavities. 8. The pneumatic tool as claimed in claim 7, wherein said rear cap further includes a stop ring that extends rearwardly away from said peripheral wall, said stop ring having an inclined ring surface that inclines radially and outwardly relative to said rotary axis, said inclined ring surface being provided with a set of speed indicating indicia that correspond to said positioning cavities, said handle being provided with a pointer for pointing to a radially aligned one of said speed indicating indicia. 9. The pneumatic tool as claimed in claim 7, wherein said rear cap further includes a notched stop ring that extends rearwardly away from said peripheral wall and that has forward and reverse stop ends disposed on opposite sides of a center line that is transverse to and that intersects said rotary axis, said operating portion extending through said stop ring and cooperating with said forward and reverse stop ends to limit extent of rotation of said direction controller. 10. The pneumatic tool as claimed in claim 1, wherein said peripheral wall of said rear cap is formed with first and second positioning cavities, said base wall of said direction controller having an outer periphery, said direction controller further including a spring-biased ball provided at said outer periphery of said base wall for engaging one of said first and second positioning cavities. 11. The pneumatic tool as claimed in claim 1, wherein said peripheral wall of said rear cap is formed with a set of radial vent holes. 12. The pneumatic tool as claimed in claim 1, wherein each of said forward and reverse speed regulators includes a regulating notch formed in said ring wall, and a regulating hole formed in said ring wall and disposed proximate to said regulating notch. 13. The pneumatic tool as claimed in claim 1, wherein said forward speed regulator includes a forward regulating notch formed in said ring wall, and a regulating hole formed in said ring wall and disposed proximate to said forward regulating notch, said reverse speed regulator including a reverse regulating notch formed in said ring wall, said reverse regulating notch having a circumferential width relative to said rotary axis larger than that of said forward regulating notch.
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