Power wrench

Details Power wrench Power wrench

1987-07-01

1989-06-13

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5744, B25B 1346

Patent

active

048381306

ABSTRACT:
A wrench is presented which includes a power cylinder having a piston rod extending therethrough. An anchor or reaction assembly comprising an anchoring ring and attached anchor rod is adjustably attached to the piston rod to permit connection of the anchoring ring to a nut spaced from the nut to be turned. A wrench assembly comprising a preferably arcuate lever arm with a ratchet assembly is pivotably connected to the power cylinder. The wrench incorporates a ratchet pawl which engages a drive mechanism. A control lever can disengage the pawl from the drive mechanism, and a latch mechanism retains the control lever and pawl in a disengaged position until released.

REFERENCES:
patent: 2757564 (1956-08-01), Reaves
patent: 4132136 (1979-01-01), Wilmeth
patent: 4513645 (1985-04-01), Grabovac et al.
patent: 4748873 (1988-06-01), Snyder

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