[특허]Pneumatic rotary tool

S.P. Air Kabusiki Kaisha

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Pneumatic rotary tool

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B25D-015/00 B23B-045/04
미국특허분류(USC)	173/093.5; 173/169
출원번호	US-0171905 (2002-06-14)
발명자 / 주소	Izumisawa, Osamu
출원인 / 주소	S.P. Air Kabusiki Kaisha
대리인 / 주소	Senniger Powers
인용정보	피인용 횟수 : 25 인용 특허 : 14

초록
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Generally, a pneumatic rotary tool of the present invention comprises a housing formed of a plastic material and includes a motor receptacle having a front end and an open rear end. An air motor is disposed within the motor receptacle of the housing. An air inlet passage extends to the motor for delivering pressurized air to the motor to power the motor to drive an output shaft. An end plate of the motor has air passaging formed therein, at least part of the air passaging defining a portion of the air inlet passage. A torque selector is at least partiall...

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1. A pneumatic rotary tool comprising:a housing formed of a plastic material, the housing including a motor receptacle having a front end and an open rear end, and end cover formed separately from the motor receptacle and located at the rear end of the motor receptacle; an air motor disposed within the motor receptacle of the housing; an air inlet supported by the housing and constructed for connection to a source of pressurized air; an air inlet passage extending from the air inlet to the motor for delivering pressurized air to the motor to power the motor to drive an output shaft; an air exhaust supported by the housing; an air exhaust passage extending from the motor to the air exhaust for exhausting air from the motor to outside the tool housing; said air motor comprising a cylindrical support sleeve, the support sleeve having at least one open end, a rotor rotatable within said support sleeve, an end plate at said open end of the support sleeve substantially closing said open end, the end plate having air passaging formed therein, at least part of said air passaging defining a portion of the air inlet passage; and a torque selector at least partially received in the end plate and including a portion disposed in the air passaging defined in the end plate and at least partially blocking the flow of air in the air passaging except through said portion of the torque selector. 2. A pneumatic rotary tool as set forth in claim 1 wherein the support sleeve and the end plate are made of metal.3. A pneumatic rotary tool as set forth in claim 1 wherein the end plate has an inlet opening therein for receiving air from the air inlet passage into the air passaging of the end plate.4. A pneumatic rotary tool as set forth in claim 3 wherein the air passaging of the end plate includes:a first channel adapted for fluid communication with the inlet opening; a torque selector receptacle receiving said portion of the torque selector therein, the first channel being in fluid communication with the torque selector receptacle; a second channel in fluid communication with the torque selector receptacle; and a first motor opening in fluid communication with the second channel and with the air motor. 5. A pneumatic rotary tool as set forth in claim 4 wherein the end plate has a front face directed toward the air motor and a rear face opposite the front face, the first and second channels being formed in the rear face of the end plate and opening rearwardly of the end plate.6. A pneumatic rotary tool as set forth in claim 5 further comprising a gasket plate at least partially made of metal and located between the end cover of the housing and the end plate, the gasket plate sealably engaging the end plate and closing the rearward opening of the first and second channels.7. A pneumatic rotary tool as set forth in claim 6 wherein the gasket plate comprises a metal plate having a plastic overmolding.8. A pneumatic rotary tool as set forth in claim 4 wherein the torque selector receptacle has a generally cylindrical inner surface and the torque selector has a generally cylindrical outer surface in face to face relation with the inner surface of the torque receptacle, the torque selector being pivotable about an axis of rotation of the torque selector in the torque selector receptacle.9. A pneumatic rotary tool as set forth in claim 8 wherein the torque selector receptacle has a first hole extending through the receptacle from the inner surface to the first channel for fluid communication of the receptacle and a second hole extending through the receptacle from the inner surface to the second channel for fluid communication with the second channel.10. A pneumatic rotary tool as set forth in claim 9 wherein the torque selector has at least two generally circumferentially extending grooves in the outer surface, the grooves being selectively disposed for registration with the first and second holes in the torque selector receptacle to permit fluid communication from the first channel to the second channel by way of the torque selector.11. A pneumatic rotary tool as set forth in claim 10 wherein the grooves are of different sizes for controlling the pressure of the air passing through the torque selector from the first channel to the second channel thereby to control the torque of the air motor.12. A pneumatic rotary tool as set forth in claim 11 wherein there are three grooves in fluid communication with each other, each groove having a different cross sectional area.13. A pneumatic rotary tool as set forth in claim 10 wherein the air passaging further includes:a third channel adapted for fluid communication with the inlet opening and for fluid communication with the torque selector receptacle; a fourth channel in fluid communication with the torque selector receptacle; a second motor opening in fluid communication with the second channel and with the air motor; and a rotation direction selector valve supported by the housing and disposed in the air passage and blocking communication of the inlet opening with the first channel or the third channel except through the valve, the selector valve being movable between a forward rotation position in which the first channel is in fluid communication with the inlet opening and the third channel is blocked from fluid communication with the inlet opening and a reverse rotation position in which the third channel is in fluid communication with the inlet opening and the first channel is blocked from fluid communication with the inlet opening. 14. A pneumatic rotary tool as set forth in claim 13 wherein the third and fourth channels define part of the exit air passage in the forward rotation position of the rotation direction selector valve and the first and second channels define part of the exit air passage in the reverse rotation position of the valve.15. A pneumatic rotary tool as set forth in claim 14 wherein the end plate has an exhaust air passageway adapted to receive exhaust air from the air motor and to exhaust it from the end plate, the exhaust air passageway being in fluid communication with the third channel and blocked by the rotation direction selector valve from communication with the first channel in the forward rotation position of the valve, the exhaust air passageway being in fluid communication with the first channel and blocked by the rotation direction selector valve from communication with the third channel in the reverse rotation position of the valve.16. A pneumatic rotary tool as set forth in claim 1 wherein the torque selector has at least two generally circumferentially extending grooves, the grooves being selectively disposed for registration with the second end plate.17. A pneumatic rotary tool as set forth in claim 1 wherein the end plate comprises an exhaust air passageway defining a portion of the exhaust air passage for receiving at least some of the air exhausted from the air motor and delivering the exhaust air from the end plate.18. A pneumatic rotary tool as set forth in claim 1 wherein the end plate constitutes a first end plate, the motor further comprising a second end plate at a second open end of the support sleeve for substantially closing the second open end.19. A pneumatic rotary tool comprising:a housing made of plastic; an air motor disposed within the housing; an air inlet supported by the housing and constructed for connection to a source of pressurized air; an air inlet passage extending from the air inlet to the motor for delivering pressurized air to the motor to power the motor to drive an output shaft; a torque selector at least partially received in the motor and defining a portion of the air inlet passage; an air exhaust supported by the housing; an air exhaust passage extending from the motor to the air exhaust for exhausting air from the motor to outside the tool housing; and wherein the portion of the air inlet passage defined by the torque selector is made of metal and is not made of plastic. 20. A pneumatic rotary tool as set forth in claim 19 wherein said air motor further comprises a cylindrical support sleeve made of metal, the support sleeve having at least one open end, a rotor rotatable within said support sleeve, and an end plate made of metal and being disposed at said open end of the support sleeve substantially closing said open end, the end plate having an air passage segment formed therein defining a portion of the air inlet passage.21. A pneumatic rotary tool as set forth in claim 20 wherein the torque selector is at least partially received in the end plate and including a portion disposed in the air passage segment defined in the end plate and blocking the flow of air in the air passage segment except through said portion of the torque selector.22. A pneumatic rotary tool as set forth in claim 20 wherein the end plate is formed separately from the support sleeve, the tool further comprising at least one fastener for use in connecting the end plate to the support sleeve.23. A pneumatic rotary tool as set forth in claim 22 wherein the housing includes an end cover located at a rearward end of the housing generally adjacent to the end plate, the end cover urging the end plate toward the support sleeve.24. A pneumatic rotary tool as set forth in claim 23 wherein the end cover is made of a first material and the end plate is made of a second material, the second material being more rigid than the first material.25. A pneumatic rotary tool as set forth in claim 24 wherein the first material is plastic or polymer and the second material is metal.

이 특허에 인용된 특허 (14)

이 특허를 인용한 특허 피인용횟수: 25

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Pneumatic rotary tool

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이 특허에 인용된 특허 (14)

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Pneumatic rotary tool

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이 특허에 인용된 특허 (14)

이 특허를 인용한 특허 피인용횟수: 25

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