Patent ID: 6474899
Filing Date: 2002-11-05
Classification: B23Q,F15B,Y10T

Abstract:
A device for locking in position a linear rod that is translatable axially, the device comprising an external body provided internally with a chamber adapted to receive the rod, a pair of locking elements movably supported by the external body and received in the chamber and configured so as to engage and lock the rod in locking positions of the locking elements, biasing members biasing the locking elements away from each other to the locking positions, a first cylinder formed in the external body and arranged on a first lateral side of the chamber, a first piston received in the first cylinder for movement toward and away from the rod, a second cylinder formed in the external body and arranged on a second lateral side of the chamber opposite said first lateral side of the chamber, a second piston received in the second cylinder for movement toward and away from the rod, the first and second pistons having each a groove configured to engage a respective end of the locking elements upon movements of the pistons toward the rod so as to move the locking elements against biasing of the biasing members from the locking positions to unlocking positions out of engagement with the rod and to disengage the end of the locking elements upon movements away from the rod so as to allow the biasing members to move the locking elements to the locking positions thereof in engagement with the rod, said each said groove having inclined side surfaces.