Tool drive mechanism

Details Tool drive mechanism Tool drive mechanism

1986-06-24

1988-09-13

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 60, 81 5722, B25B 1346

Patent

active

047700718

ABSTRACT:
A tool drive includes upper and lower coaxial manually rotatable drive members and a driven tool member at the bottom of the lower drive member. A reversible unidirectional transmissions rotatably couple both the upper and lower drive members to the driven member. The transmission coupling the lower drive member includes a peripheral ratchet formed in the lower inside face of the lower drive member. A double ended pawl rockably carried by the upper drive member with its opposite ends alternatively drive engaging the ratchet so as to provide a ratchet coupling driving in alternative opposite directions. A follower carried by the driven member engages a cam on the pawl to transfer the pawl between opposite drive positions in accordance with the angular directional relationship between the upper drive and driven members.

REFERENCES:
patent: 3707893 (1973-01-01), Hofman
patent: 3868983 (1975-03-01), Newcomb
patent: 4265148 (1981-05-01), Gartzke
patent: 4318314 (1982-03-01), Furedi et al.
patent: 4474089 (1984-10-01), Scott
patent: 4592256 (1986-06-01), Bosque
Barwin Pty. Limited, Sydney, Australia, Barlow Winches Brochure, date unknown.

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