Patent ID: 8262098
Filing Date: 2012-09-11
Classification: B23B,Y10T

Abstract:
1. A collet for use with a rotary tool comprising: a bit holder defining a shank receiving bore; a passage opening to the shank receiving bore at a first end portion and opening to an outer wall of the bit holder at a second end portion, the passage including a first upper bearing portion and a first lower bearing portion; a transfer member movable within the passage between a first position whereat the transfer member is in contact with the first upper bearing portion but not the first lower bearing portion and a second position whereat the transfer member is in contact with the first lower bearing portion but not the first upper bearing portion; and a sleeve movable between an upper position whereat the transfer member is forced at least partially into a cavity of a shank when the shank is in the shank receiving bore and a lower position whereat the transfer member is free to move out of the cavity when the shank is in the shank receiving bore, wherein the passage and the transfer member are configured such that when the bit holder is rotated in a first direction and the transfer member is in the second position, rotational force is transferred to the shank through the transfer member, and when the bit holder is rotated in the first direction and the transfer member is in the first position, rotational force is transferred to the shank through the transfer member and an axial force is placed on the shank biasing the shank in a direction downwardly into the shank receiving bore.