Torque control mechanism for wrenches and the like

Details Torque control mechanism for wrenches and the like Torque control mechanism for wrenches and the like

1991-06-10

1992-07-14

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

81478, B25B 23159

Patent

active

051292939

ABSTRACT:
A torque control mechanism for wrenches and the like in which a pivot block has one end rockably engaging a force tranmsission member, an axially movable plunger has one end rockably opposing a second end of the pivot block, a ball screw carried by the plunger has a control ball element engaging the second end of the pivot block, a balance cam carried by the plunger provides seat for a coiled compression spring having its opposite end engaged by an antifriction device permitting the spring to turn for adjustment purposes, a rotatably adjustable transfer screw engages the antifriction device and is threaded through a stop adjusting nut mounted in the distal end portion of tubular housing for the mechanism. The distal end portion of the transfer screw is secured in an end cap fixed within a distal end of a handle mounted on the housing; and the components of the mechanism provide a continuous passage therethrough for respective adjustment wrenches to be applied from the handle end of the tool to respectively the ball screw, a ball screw lock screw, and to said balance cam.

REFERENCES:
patent: 2918834 (1959-12-01), Cranford
patent: 3165014 (1965-01-01), Grabovac
patent: 3270594 (1966-09-01), Grabovac
"Torque Tools" catalog sheet, No Date.

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