Patent ID: 7491020
Filing Date: 2009-02-17
Classification: B23B,Y10S,Y10T

Abstract:
1. A chuck assembly for a rotatable spindle, comprising: a cylindrical body having a forward section, a collar and a rearward section, the forward section having a center hole formed therethrough, the collar having a plurality of angularly disposed guide channels, and the rearward section being mountable to the spindle; a plurality of jaws members slidably disposed in the guide channels, each jaw member having a threaded surface formed on an outer side thereof; a nut disposed about the collar of the body in threaded engagement with the threaded surfaces of the jaw members and rotatable for adjusting a position of the jaw members; an impactor ring selectably engageable with the nut for transmitting a torque to the nut; and a mode selection mechanism operable to engage the impactor ring with the nut, the mode selection mechanism having at least two selectable positions in which the impactor ring engages the nut, where the impactor ring transmits a first torque to the nut in a first position of the mode selection mechanism and a second torque, less than the first torque, to the nut in a second position of the mode selection mechanism.