Patent ID: 7237987
Filing Date: 2007-07-03
Classification: B23B,B25B,Y10T

Abstract:
1. A tool including: a yoke having a pair of arms that each have a free end, the yoke having a shaft extending outwardly in a direction opposite to that of the arms; a block mounted to pivot between the arms of the yoke, the block including a pair of split compression collars with external threaded surfaces, the collars extending outward from the block in opposite directions, wherein, mounted on each collar is an internally threaded coupling member for compressing the collar upon being screwed onto the collar, one collar being configured to receive a detachable drill element, the other collar being configured to receive a detachable drive element; a sleeve mounted on the yoke to move reciprocally in an axial direction between first and second positions, the sleeve being configured to restrain the block from pivoting when the sleeve is in the first position, and to permit the block to pivot when the sleeve is in the second position; and a spring within the sleeve that is compressed upon the sleeve being moved into the second position, the spring biasing the sleeve to the first position upon release of the sleeve; wherein the sleeve has a surface defining a receptacle; wherein each coupling member comprises a smooth surfaced first cylindrical portion having a first diameter sized to fit in the receptacle, and a knurled surfaced second cylindrical portion having a second diameter larger than the first diameter and sized to not fit in the receptacle, the second cylindrical portion being separated from the first cylindrical portion by a raised shoulder; and wherein the sleeve and the block are positioned in relation to each other such that, when the spring biases the sleeve to the first position, the sleeve captures within the receptacle the first portion of one of the coupling members so as to restrain the block from pivoting.