Patent ID: 6199872
Filing Date: 2001-03-13
Classification: B23B,B25B,Y10S,Y10T

Abstract:
A holder for holding a tool or tool bit, the holder comprising:an elongated housing, including a longitudinal hole at a distal end thereof having a cross-section sized to accept a mounting portion of the tool or tool bit, and a tool mount at a proximal end thereof, said housing further including at least one radial hole running from an outside surface of the housing to the longitudinal hole, the at least one radial hole having a large diameter portion at the outside surface of the housing and a small diameter portion at the longitudinal hole,a locking means having a nominal diameter less that said large diameter portion and greater than said small diameter portion, movably arranged in the at least one radial hole, movable between a outward location and an inward location, cooperating with a circumferential groove in the tool bit to lock the tool bit in place when the tool bit is fully inserted into the holder and when said locking means is at said inward location,an outer sleeve arranged to reciprocally slide over the housing between two end positions, where the outer sleeve has a distal end and a proximal end, and the outer sleeve is biased towards the distal end by a first biasing means, and where the sleeve has a portion thereof which blocks said locking means when a tool or tool bit is fully inserted into the longitudinal hole so as to prevent said locking means from moving away from said inward location where said tool or tool bit is locked in place,an end stop arranged to limit the movement of the sleeve in the biasing direction, wherein the holder further comprises:a plunger, anchored within said longitudinal hole and arranged to reciprocally slide inside the longitudinal hole, biased to act against a proximal end of an installed tool bit to eject said tool bit when not locked in place.