Patent ID: 6776562
Filing Date: 2004-08-17
Classification: B23B,Y10S,Y10T

Abstract:
A power feed attachment for a hand held drill, the power feed attachment comprising:a coupling structure adapted for coupling the power feed attachment to the hand held drill; a double-acting cylinder having a housing, a piston and a rod, the housing being fixedly coupled to the coupling structure, the piston being disposed within the housing and movable between a first position and a second position, the rod being coupled for movement with the piston; a two-position valve assembly that is selectively operable in a first condition and a second condition, the two-position valve assembly being configured for directing a pressurized fluid to the double-acting cylinder wherein operation of the two-position valve assembly in the first condition operably directs the pressurized fluid to the piston such that the piston moves toward the first position and wherein operation of the two-position valve assembly in the second condition operably directs the pressurized fluid to the piston such that the piston moves toward the second position; an arm coupled to the rod; a control mechanism having a housing, which is fixedly coupled to the coupling structure, and a control rod, the control rod being movably within the housing of the control mechanism between an extended position and a retracted position, the control mechanism having a biasing device for biasing the control rod toward the extended position, the control rod being configured to contact the arm to resist movement of the piston toward the second position to thereby control a rate by which the piston is advanced toward the second position; and a bushing operably coupled to a distal end of the arm, the bushing having a through hole that is adapted for allowing a tool bit that is rotatably coupled to the hand held drill to pass therethrough.