Patent ID: 8109183
Filing Date: 2012-02-07
Classification: B25B,Y10T

Abstract:
1. An impact resistant tool comprising: a tool holder body defining an axis and having a first and second end, said first end having one of a tool receiving attachment and a tool, and said second end having a shank receiving bore, said holder body including a pocket between said first and second ends, said pocket defined by a first plurality of walls defining a generally polygonal cross-section; a shank defining an axis, said shank having a first and second end, said first end having a mating configuration for being received in said shank receiving bore of said holder body, said shank first end being able to rotate in said shank receiving bore, said shank second end having a configuration for mating with a power tool, said shank including a pocket between said first and second ends, said pocket defined by a second plurality of walls defining a generally polygonal cross-section; a rotation limiting mechanism coupled with said holder body and said shank for limiting rotation of said holder body and shank with respect to one another; and a damping mechanism received in said holder body pocket and said shank pocket, said damping mechanism having a polygonal cross-section for fitting into said pockets and configured to absorb a torsional force when said shank rotates relative to said holder body, wherein at least one of the first plurality of walls and the second plurality of walls includes a recessed portion for receiving a portion of material of the damping mechanism when the damping mechanism deforms to absorb the torsional force.