IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0914076
(2010-10-28)
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등록번호 |
US-8347979
(2013-01-08)
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발명자
/ 주소 |
- Young, Randi Jane
- Murphy, Nathanael S.
|
출원인 / 주소 |
|
대리인 / 주소 |
Michael Best & Friedrich LLP
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
57 |
초록
▼
A pneumatic impact wrench includes a handle assembly graspable by a user, a work attachment connected to the handle assembly, an inlet permitting air flow to drive the impact wrench, an outlet permitting air flow out of the impact wrench, a motor assembly positioned between the inlet and the outlet
A pneumatic impact wrench includes a handle assembly graspable by a user, a work attachment connected to the handle assembly, an inlet permitting air flow to drive the impact wrench, an outlet permitting air flow out of the impact wrench, a motor assembly positioned between the inlet and the outlet includes a rotor driven by the air flow between the inlet and the outlet. The motor assembly defines a longitudinal motor axis about which the rotor rotates. An output drive is connected to the motor assembly to selectively rotate in response to rotation of the rotor, the output drive defines a longitudinal output axis about which the output drive rotates, the longitudinal output axis is substantially perpendicular to the longitudinal motor axis, and an impact mechanism is positioned between the motor assembly and the output drive to selectively drive the output drive in response to rotation of the rotor.
대표청구항
▼
1. A pneumatic impact wrench comprising: a handle assembly graspable by a user;a work attachment coupled to the handle assembly;an inlet permitting air flow into the pneumatic impact wrench to drive the impact wrench;an outlet permitting air flow out of the pneumatic impact wrench;a motor assembly p
1. A pneumatic impact wrench comprising: a handle assembly graspable by a user;a work attachment coupled to the handle assembly;an inlet permitting air flow into the pneumatic impact wrench to drive the impact wrench;an outlet permitting air flow out of the pneumatic impact wrench;a motor assembly positioned between the inlet and the outlet, the motor assembly including a rotor driven by the air flow between the inlet and the outlet, the motor assembly defining a longitudinal motor axis about which the rotor rotates;an output drive coupled to the motor assembly and selectively rotated in response to rotation of the rotor, the output drive defining a longitudinal output axis about which the output drive rotates, wherein the longitudinal output axis is substantially perpendicular to the longitudinal motor axis;an impact mechanism positioned between the motor assembly and the output drive, the impact mechanism selectively driving the output drive in response to rotation of the rotor;a valve coupled to the handle assembly, the valve moveable between a first position, in which the pneumatic impact wrench operates in a forward direction, and a second position, in which the pneumatic impact wrench operates in a reverse direction; anda motor housing mounted around the rotor and valve, the motor housing including an inner surface facing toward the rotor and valve, and an outer surface facing away from the rotor and valve; an inlet passage defined between the inlet and the rotor, the inlet passage defining an inlet longitudinal axis; and an exhaust passage defined between the inner surface of the motor housing and the rotor; wherein a majority of the exhaust passage extends substantially parallel to the inlet longitudinal axis. 2. The pneumatic impact wrench of claim 1, further comprising a throttle mechanism coupled between the inlet and the motor assembly to permit actuation of the pneumatic impact wrench by a user. 3. The pneumatic impact wrench of claim 1, further comprising a valve actuator rotatable about the handle assembly to permit a user to move the valve between the first position and the second position. 4. The pneumatic impact wrench of claim 1, wherein a portion of the exhaust passage extends through a portion of the valve. 5. The pneumatic impact wrench of claim 1, further comprising a detent mechanism resiliently holding the valve in the first and second positions. 6. The pneumatic impact wrench of claim 1, wherein the impact mechanism comprises a hammer coupled to the rotor for rotation with the rotor, and an anvil coupled to the output drive, the hammer operable to impact the anvil to impactingly drive the output drive in response to rotation of the rotor. 7. A pneumatic impact wrench comprising: a handle assembly graspable by a user;a work attachment coupled to the handle assembly;an inlet permitting air flow into the pneumatic impact wrench to drive the impact wrench;an outlet permitting air flow out of the pneumatic impact wrench;a motor assembly positioned between the inlet and the outlet, the motor assembly including a rotor driven by the air flow between the inlet and the outlet, the motor assembly defining a longitudinal motor axis about which the rotor rotates;an output drive coupled to the motor assembly and selectively rotated in response to rotation of the rotor, the output drive defining a longitudinal output axis about which the output drive rotates, wherein the longitudinal output axis is substantially perpendicular to the longitudinal motor axis;an impact mechanism positioned between the motor assembly and the output drive, the impact mechanism selectively driving the output drive in response to rotation of the rotor;a valve coupled to the handle assembly, the valve moveable between a first position, in which the pneumatic impact wrench operates in a forward direction, and a second position, in which the pneumatic impact wrench operates in a reverse direction; anda motor housing mounted around the rotor and valve, the motor housing including a slot, an inner surface facing toward the rotor and valve, and an outer surface facing away from the rotor and valve; and a valve actuator including a head and a stem; wherein the head of the valve actuator is in sliding engagement with the outer surface of the motor housing; and wherein the stem extends through the slot in the motor housing to engage the valve, such that sliding the actuator head along the outer surface of the motor housing causes movement of the valve. 8. A pneumatic impact wrench comprising: a handle assembly graspable by a user;a work attachment coupled to the handle assembly;an inlet permitting air flow into the pneumatic impact wrench to drive the impact wrench;an outlet permitting air flow out of the pneumatic impact wrench;a motor assembly positioned between the inlet and the outlet, the motor assembly including a rotor driven by the air flow between the inlet and the outlet, the motor assembly defining a longitudinal motor axis about which the rotor rotates;a valve coupled to the handle assembly, the valve moveable between a first position, in which the rotor is rotated in a first direction, and a second position, in which the rotor is rotated in a second direction, opposite the first direction;an output drive coupled to the motor assembly and selectively rotated in response to rotation of the rotor, the output drive defining a longitudinal output axis about which the output drive rotates, wherein the longitudinal output axis is substantially perpendicular to the longitudinal motor axis;an impact mechanism positioned between the motor assembly and the output drive, the impact mechanism selectively driving the output drive in response to rotation of the rotor; anda motor housing mounted around the rotor and valve, the motor housing including an inner surface facing toward the rotor and valve, and an outer surface facing away from the rotor and valve; an inlet passage defined between the inlet and the rotor, the inlet passage defining an inlet longitudinal axis; and an exhaust passage defined between the inner surface of the motor housing and the rotor; wherein a majority of the exhaust passage extends substantially parallel to the inlet longitudinal axis. 9. The pneumatic impact wrench of claim 8, further comprising a throttle mechanism coupled between the inlet and the motor assembly to permit actuation of the pneumatic impact wrench by a user. 10. The pneumatic impact wrench of claim 8, wherein the impact mechanism comprises a hammer coupled to the rotor for rotation with the rotor, and an anvil coupled to the output drive, the hammer operable to impact the anvil to impactingly drive the output drive in response to rotation of the rotor. 11. The pneumatic impact wrench of claim 8, further comprising a valve actuator rotatable about the handle assembly to permit a user to move the valve between the first position and the second position. 12. The pneumatic impact wrench of claim 8, wherein a portion of the exhaust passage extends through a portion of the valve. 13. The pneumatic impact wrench of claim 8, further comprising a detent mechanism resiliently holding the valve in the first and second positions. 14. A pneumatic impact wrench comprising a handle assembly graspable by a user;a work attachment coupled to the handle assembly;an inlet permitting air flow into the pneumatic impact wrench to drive the impact wrench;an outlet permitting air flow out of the pneumatic impact wrench;a motor assembly positioned between the inlet and the outlet, the motor assembly including a rotor driven by the air flow between the inlet and the outlet, the motor assembly defining a longitudinal motor axis about which the rotor rotates;a valve coupled to the handle assembly, the valve moveable between a first position, in which the rotor is rotated in a first direction, and a second position, in which the rotor is rotated in a second direction, opposite the first direction;an output drive coupled to the motor assembly and selectively rotated in response to rotation of the rotor, the output drive defining a longitudinal output axis about which the output drive rotates, wherein the longitudinal output axis is substantially perpendicular to the longitudinal motor axis;an impact mechanism positioned between the motor assembly and the output drive, the impact mechanism selectively driving the output drive in response to rotation of the rotor; anda motor housing mounted around the rotor and valve, the motor housing including a slot, an inner surface facing toward the rotor and valve, and an outer surface facing away from the rotor and valve; and a valve actuator including a head and a stem; wherein the head of the valve actuator is in sliding engagement with the outer surface of the motor housing; and wherein the stem extends through the slot in the motor housing to engage the valve, such that sliding the actuator head along the outer surface of the motor housing causes movement of the valve.
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