Low torque automatic screwdriver

B - Operations – Transporting – 25 – B

Patent

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81/23

B25B 21/00 (2006.01) B25B 23/145 (2006.01)

Patent

CA 1089260

IMPROVED LOW TORQUE AUTOMATIC SCREWDRIVER Abstract of the Disclosure A pneumatic powered screwdriver adapted for moderate- ly high speed operation and automatic shutoff at relative low torque turning resistance. An axially disengageable clutch unit intermediately couples the motor drive to the output drive bit. Contained in the clutch unit is an improved shutoff and reset mechanism which is cam shifted radially in response to clutch disengagement fox enabling air supply interruption to the motor and automatically and positively reset for enabling subsequent operation. .1a.

312395

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