Electric wrench

Details Electric wrench Electric wrench

B - Operations, Transporting

25

B

B25B 21/00 (2006.01) B25B 21/02 (2006.01) F16D 27/118 (2006.01) H02K 7/116 (2006.01)

Patent

CA 2051853

An electric wrench includes a motor, an electromagnetically controlled clutch comprising electromagnet members and temporary-magnetizable members, a centrifugal control switch to de-energize the electromagnet members when the drive shaft connected to the motor spins at a predetermined rate of rotation and to energize the electromagnet members when the drive shaft spins slower than the predetermined rate of rotation, and a centrifugal swinging device for actuating the centrifugal controlled switch.

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