Fluid-operated wrench

Details Fluid-operated wrench Fluid-operated wrench

1988-07-29

1990-12-04

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 1300

Patent

active

049744763

ABSTRACT:
A fluid-operated wrench as comprising a cylinder-piston unit with a cylinder having a guide and a piston performing an active stroke in one direction and a reverse stroke in an opposite direction, an engaging member arranged to engage a threaded connector to be tightened or loosened, and formed so that its one circumferential portion engages the threaded connector while its remaining circumferential portion is open, and a reaction member arranged to abut against an adjacent object and spaced from the engaging member in the direction of the active stroke so that a reaction force during the active stroke tends to push the guide onto the engaging member and to reliably hold the latter on the threaded connector.

REFERENCES:
patent: 4446762 (1984-05-01), Junkers
patent: 4513645 (1985-04-01), Grabovac et al.
patent: 4591288 (1986-05-01), Schmidek et al.
patent: 4663997 (1987-05-01), Junkers
patent: 4706526 (1987-11-01), Junkers

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