Patent ID: 6530299
Filing Date: 2003-03-11
Classification: B25B

Abstract:
A joint adapter for a power drill screw driver comprising:a) a driving shaft having an insertion groove at a first end, an insertion piece at a second end, and a neck located in a middle of said driving shaft, wherein the first end is larger in cross-section than the neck and second end; b) a screw driver bit removably plugged into said insertion groove of said driving shaft, the screw driver bit having a contact tip; c) a slide socket movably mounted on said driving shaft so as to surround the enlarged first end of the driving shaft, the slide socket having an axial insertion hole, a magnet fixed at a front end of said axial insertion hole and an inwardly extending clamping ring located so as to contact the larger cross-section first end thereby limiting movement of the slide socket relative to the driving shaft such that the contact tip always extends outwardly of the slide socket through the axial insertion hole; d) a packing ring mounted on the neck of said driving shaft; and, e) a compression spring located around said neck of said driving shaft between the packing ring and the clamping ring of said slide socket.