Hammer drill bit chuck attachment

Details Hammer drill bit chuck attachment Hammer drill bit chuck attachment

B - Operations, Transporting

25

D

B25D 17/08 (2006.01) B25D 11/00 (2006.01)

Patent

CA 2508038

A hammer drill bit chuck attachment comprises a drive shaft for rotation by a drill. The drive shaft has a shank portion defining a longitudinal axis and an annular flange portion projecting radially outwardly from the shank portion for longitudinal and rotational movement therewith. The annular flange portion having a rearwardly facing toothed surface. A drill bit chuck is mountable on the drive shaft forwardly of the annular flange portion for rotation with the drive shaft. An actuator collar has a forwardly facing toothed surface and is mounted on the shank portion rearwardly of the annular flange portion, for free rotation about the shank portion and for longitudinal sliding movement along the shank portion between a forward operatively engaged position whereat the forwardly facing toothed surface of the actuator collar is in rotational engagement with the rearwardly facing toothed surface of the annular flange portion as the shank portion is rotated, to thereby impart reciprocating motion along the longitudinal axis to the shank portion, and a rearward released position wherein the forwardly facing toothed surface of the actuator collar is removed from the rotational engagement with the rearwardly facing toothed surface of the annular flange portion. A spring is operatively mounted between the actuator collar and the drive shaft for biasing the actuator collar to the forward operatively engaged position.

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