Torque wrench

Tools – Wrench – screwdriver – or driver therefor – Machine

Patent

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Details

B25B 1340

Patent

active

052032396

ABSTRACT:
A torque wrench in which the torquing forces are applied to the article torqued equally and oppositely in a diametrically opposed manner. The body of the wrench comprises a two-part metal frame which permits the wrench to be significantly lighter than prior art wrenches. The applied forces may be provided by at least four hydraulic cylinders mounted in a frame, equally spaced about a central opening in which the article to be torqued is gripped. The fluid power cylinders apply force to the legs of a rotatable drive means which, in turn, rotates the member torqued. In order to provide rotation in both directions, each cylinder of the wrench is pivotable to permit the drive means to be selectively rotated in opposite directions.

REFERENCES:
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patent: 4137800 (1979-02-01), Austin
patent: 4398598 (1983-08-01), Fabrygel
patent: 4409865 (1983-10-01), Krautter et al.
patent: 4506567 (1985-03-01), Makhlouf
patent: 4706527 (1987-11-01), Junkers
patent: 4744271 (1988-05-01), Collins
patent: 4838130 (1989-06-01), Snyder

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