Power wrench

Details Power wrench Power wrench

1985-03-29

1986-10-28

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 1346

Patent

active

046191607

ABSTRACT:
The piston-cylinder unit (30') of a power wrench presses against the arm (16), by means of a ball and socket joint (44, 45), for swivelling the ring (11), which is connected secure against rotation to the wrench head to be turned. The piston (35) and the arm (16) have complementary spherical surfaces (40, 41) which press against each other. The dimensions of the spherical surfaces can be selected in dependence on the maximum power to be transmitted. The result is a uniform power distribution and a force-free adaptation of the movements of piston (35) and arm (16), without jamming and tilting.

REFERENCES:
patent: 4027561 (1977-06-01), Junkers
patent: 4200011 (1980-04-01), Wilmeth
patent: 4440046 (1984-04-01), Hirtsiefer et al.
patent: 4524651 (1985-06-01), Dabiel et al.

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