Patent ID: 6460862
Filing Date: 2002-10-08
Classification: B23B,Y10T

Abstract:
A chuck having a chuck body defining a front face, four radial jaw grooves provided in said front face, two pairs of opposed jaws slidably provided in said jaw grooves, said chuck comprising:(a) a first rotary vane actuator having a first vane and a longer first vane. shaft; (b) a second rotary vane actuator having a second vane and a shorter second vane shaft; (c) said first and second actuators coaxially aligned; (d) a distal end of said first vane shaft operatively connected with one pair of the opposed jaws, a distal end of said second vane shaft operatively connected with the other pair of opposed jaws such that the two pairs of opposed jaws are differentially actuated by said first and second rotary vane actuators.