Patent ID: 7213317
Filing Date: 2007-05-08
Classification: B25B,Y10T

Abstract:
1. A shaft pushing device comprising: a driving mechanism having a threaded tube with a threaded outer periphery and a push rod movably extending through the threaded tube, a distal end of the push rod extending out from an end of the threaded tube; a grasp mechanism having a first ring threadedly mounted to the threaded tube and a plurality of pawls pivotably connected to the first ring, each pawl having a hook end, and an adjusting mechanism having an adjusting nut threadedly mounted to the threaded tube and located between the first ring and the distal end of the push rod, a second ring mounted to the adjusting nut and a plurality of stretch rods pivotably connected between the pawls and the second ring whereby the adjusting nut when turned moves the threaded nut and the second ring axially along the threaded tube and thereby adjusts the hook ends of the pawls inward or outward.