Torque limiting driver

Details Torque limiting driver Torque limiting driver

1976-05-10

1977-08-16

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

B25B 2314

Patent

active

040418111

ABSTRACT:
A hand operated nut or screw driver which utilizes an adjustable clutch action to limit the amount of torque applicable to a workpiece. An elongated handle member has a pair of clutch hubs, one disposed at either end thereof, for frictional engagement with pre-formed recesses in the handle. Each clutch hub is fixedly engaged with a driven shaft that extends freely through the handle. The driven shaft is threadingly engaged at one end by an adjusting knob and has workpiece engaging means formed at its distal end. The torque at which the handle member slips relative to the clutch hubs is proportional to the degree to which the adjusting knob is threadingly secured on the driven shaft.

REFERENCES:
patent: 1238654 (1917-08-01), Ewart
patent: 2439980 (1948-04-01), Livermont
patent: 2933959 (1960-04-01), McMahon

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