Power operated torque tool

Details Power operated torque tool Power operated torque tool

1976-04-13

1977-09-20

Herrmann, Allan D.

192 clutches and power-stop control

Stop mechanism

Overload release

91 59, 173 12, 192 034, F16D 4320

Patent

active

040491048

ABSTRACT:
In a power operated torque tool, the pressure-fluid feed is controlled by a valve which opens to start the tool, and closes to stop it. This valve is mounted on the end of a push-rod which extends along the axis of the tool. The tool also has a clutch which disengages on reaching a predetermined torque, and at the same time releases a grip on the push-rod, so that the valve can move to close the feed to the tool motor, and thus to stop the tool. The grip on the push-rod is exerted by a group of balls held in a sleeve and pushed against the rod by a tube with a tapered internal wall which surrounds the sleeve. The balls are pushed against the taper by a light spring, which is considerably weaker than the spring which holds the clutch in engagement.

REFERENCES:
patent: 3288258 (1966-11-01), Taylor
patent: 3289715 (1966-12-01), De Groff et al.
patent: 3616864 (1971-11-01), Sorensen

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