Mechanical lockout for a pneumatic tool

Details Mechanical lockout for a pneumatic tool Mechanical lockout for a pneumatic tool

B - Operations, Transporting

25

D

B25D 9/04 (2006.01) B25D 9/16 (2006.01) B25D 17/04 (2006.01) B25D 17/08 (2006.01)

Patent

CA 2159705

The invention is a safety mechanism for an air-powered tool. The mechanism senses the position of the tool's implement retainer (54) and disables the air flow to the tool's motor if the retainer (54) is not in its locked position. The mechanism employs a pushrod (62) that has one end (66) adapted to contact a rear surface (68) of the retainer (54) when the retainer is in its lock position. The other end (70) of the pushrod (62) is adapted to contact a spring-biased ball-type check valve (24) located within the air inlet to the tool's motor. When the retainer (54) is removed from the tool, the pushrod (62) moves forwardly under the urging of the valve (24) and at the same time allows the valve to move to its closed position to thereby prevent any flow of pressurized air to the motor.

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