Patent ID: 7108108
Filing Date: 2006-09-19
Classification: B23B,F15B,Y10T

Abstract:
1. A device for controlling movement between that device and a rod operatively engaged with that device, comprising a body member, a bushing carried by said body member and provided with a hydraulic system for moving said center section between its said outer and inner positions comprising said piston pin being movable in said cylinder bore an actuating piston engaging said piston pin and moving therewith between inner and outer positions, means biasing said actuating piston and said piston pin toward their inner position, and means for applying pressure against said actuating piston to move said actuating piston and said piston pin in contravention to said biasing means to their outward position to release the rod, said biasing means moving said actuating piston and said piston pin toward their inner position to move said center section to its inner position to clamp the rod and stop movement between the rod and the device in the event of a significant reduction of pressure against said actuating piston.