Air shut-off tool

Details Air shut-off tool Air shut-off tool

B - Operations, Transporting

25

B

81/21, 121/6

B25B 23/00 (2006.01) B25B 19/00 (2006.01) B25B 23/145 (2006.01) F01B 17/02 (2006.01) F01B 25/02 (2006.01)

Patent

CA 1038664

Abstract of the Disclosure This invention relates to power tools and more parti- cularly to an air-operated power tool commonly used for automotive or other assembly operations for installing threaded fasteners. The device of this invention shuts off the power tool as it approaches the stall condition. Motor rotation is sensed by transferring a small mass of air in proportion to the speed of the motor but independent of the air expanded to operate the motor. The air transferred is utilized to create a signal which through an air-operated valve shuts the power tool off when the speed is reduced below a predetermined amount as when the torquing cycle is nearing completion.

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