Torque wrench

Details Torque wrench Torque wrench

B - Operations, Transporting

25

B

B25B 13/46 (2006.01) B25B 21/00 (2006.01)

Patent

CA 2083495

ABSTRACT A torque wrench (10) 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 (14, 16) which permits the wrench to be significantly lighter than prior art wrenches. The applied forces are pro- vided by four hydraulic cylinders (30) mounted in a frame, equally spaced about a central opening in which the member to be torqued is gripped. The fluid power cylinders apply force to the legs (42) of a rotatable drive means (34) which, in turn, rotates the member torqued. In order to provide rotation in both direc- tions, each cylinder (30) of the wrench is pivotable to engage two adjacent legs (42) of the drive means (34) and thereby permit the drive means to selectively rotate in opposite directions. The hydraulic wrench according to the invention is provided with a self-contained hyd- raulic system (32) in order to create a completely port- able unit which is generally free from hydraulic contami- nation.

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