[특허]Impact wrench having speed control circuit

Impact wrench having speed control circuit 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-007/29
출원번호	US-0232559 (1994-04-25)
발명자 / 주소	DeFrancesco Angelo J. (Glen Ellyn IL) Elligson Daniel M. (Millers MD) Kunz Michael P. (Hampstead MD)
출원인 / 주소	Black & Decker Inc. (Newark DE 02)
인용정보	피인용 횟수 : 47 인용 특허 : 0

초록 ▼

An impact wrench having a speed limiting control circuit to allow an operator of the wrench to controllably limit the maximum speed of the wrench to a predetermined value when a trigger thereof is fully engaged. The impact wrench includes a manually adjustable speed limiting control protruding from an outer surface of the impact wrench which is conveniently manually adjustable. The speed limiting control is coupled to the wiper arm of a speed limiting potentiometer which is electrically coupled to a speed control circuit within the impact wrench. The speed limiting potentiometer limits the maximum speed of the motor of the impact wrench (and thus the maximum torque which can be generated by the impact wrench 10) to an operator selected percentage of the maximum motor speed which would otherwise be produced when the trigger is fully engaged. In the preferred embodiment the speed limiting potentiometer is electrically coupled in series between a capacitor and speed control potentiometer, which are each coupled to a 555 CMOS timer which controls the duty cycle of an FET used to drive the motor. The speed limiting potentiometer enables the operator to further limit the maximum duty cycle of the output of the timer, which is a pulse-width-modulated like output, to a percentage of that which would otherwise be produced when the trigger is fully engaged.

대표청구항 ▼

A variable speed impact wrench having an operator settable maximum speed control to limit the maximum torque applied to a tool bit holder of the wrench, said impact wrench comprising: a motor for driving the tool bit holder; a speed control circuit for controlling the speed of said motor; a trigger engageable by an operator, said trigger being operably coupled to said speed control circuit to allow said operator to generate a speed control signal in relation to the degree of actuation of said trigger; a speed limiting device electrically communicating with said speed control circuit and manually adjustable by said operator for enabling said operator to electrically limit a maximum speed at which said motor can be driven when said trigger is fully engaged.

이 특허를 인용한 특허 (47)

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Alan A. Gilmore, Electrical power tool having a motor control circuit for providing control over the torque output of the power tool.
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Gilmore, Alan A., Electrical power tool having a motor control circuit for providing control over the torque output of the power tool.
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Ely, Sean C.; Bartoszek, Jason Christopher; Dougherty, Thomas S.; Heinrichs, Kevin; Leavitt, Douglas Fornell; Naksen, Dennis; Seith, Warren A.; Johnson, Joshua Odell; Xie, Pinhua; Cooper, Timothy Richard, Lighting systems for power tools.
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Carr Ronald L., Method and apparatus for determining and adjusting torque in an electric impact torque wrench.
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Elsmark, Karl Johan Lars; Persson, Lars Magnus, Method and device for tightening joints.
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Trautner, Paul K.; Scheerer, David E.; Schroeder, James D.; Bush, Dennis A., Multi-speed drill and transmission with low gear only clutch.
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Serdynski,David P.; Miller,Boyd J.; Bublitz,Scott D.; Thorson,Troy C.; Bednar,Thomas R.; Griep,David B.; Uehlein Proctor,Nancy; Grzybowski,Dennis J.; Holly,Jeffery S.; Hessenberger,Jeffrey C.; Kubale, Portion of a power tool.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Impact wrench having speed control circuit 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (47)

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연합인증

Impact wrench having speed control circuit 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (47)

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