Patent ID: 7213804
Filing Date: 2007-05-08
Classification: B25B

Abstract:
1. A clamping device designed to hold a construction piece including a clamping lever, which climbs by pivoting around a transverse axis on a case, formed by two half-shells symmetric alone their joining plane and containing the clamping mechanism of the device, to be operated, by the intermediary of a fluid cylinder and a system of a connecting rod and crank or directly, alternately between two positions: a first inactive position which releases the piece, and a second active position, which clamps onto the piece, in which each of the two half-shells which form the case includes at least one reinforcement insert made of a distinctly more rigid material and placed in each half-shell in a zone subjected to high stress during clamping, so as to confer a resistance to the stress in said zone, augmented in torsion, in traction or in compression, wherein each half shell of the case (a) is made of a plastic material directly molded around the reinforcement insert and. (b) includes a symmetrical insert made from a plate cut from a metallic block, in which holes are made of which a circular hole corresponds to an opening in one of the half-shells for the passage of the transverse axis of the lever, and an other oblong hole corresponds to an opening in the same half-shell for clearance of the head of a piston.