Screwdriving tool

Details Screwdriving tool Screwdriving tool

1987-05-19

1989-09-19

Yost, Frank T.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

B25B 23155

Patent

active

048670197

ABSTRACT:
A screw driving tool comprises a housing in which are located two plates having recesses therein in which balls are received. One plate is adjustable located in the housing whilst the other plate is slidable therein and biased by a spring towards the located plate. The balls provide a driving connection between the plates to transmit the drive from a power tool, in which a shaft connected to the slidable plate is received, to a screw driving bit received in a bore of the other plate. When the screwing torque reaches a predetermined amount the force of the spring is overcome and relative rotation of the plates can occur and the driving bit can cease to rotate with the shaft.

REFERENCES:
patent: 4262501 (1981-04-01), Vaughn et al.
patent: 4653358 (1987-03-01), Lankry

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