Patent ID: 6012712
Filing Date: 2000-01-11
Classification: B25B

Abstract:
A double vise assembly having a base supporting a center fixed jaw, and first and second movable jaws, movable toward and away from the fixed jaw on opposite sides of the fixed jaw, a vise screw for actuating the movable jaws including a threaded section threadably mounted in the second jaw, and a threaded clutch sleeve section threadably engaging the first jaw, said vise screw including a shoulder, a housing slidable on the vise screw, and a spring carried on the vise screw and reacting axial loads between the clutch sleeve section and the shoulder, the spring being compressed upon initial contact of either one of said movable jaws for clamping a workpiece to preload such workpiece, and a release coupling between the threaded clutch sleeve section and the vise screw to permit tightening the second jaw to a predetermined force level and subsequently releasing to permit the screw to rotate and be threaded relative to the first jaw.