Patent ID: 7752946
Filing Date: 2010-07-13
Classification: B25B

Abstract:
1. A socket for wrenches comprises: a main body having a proximal section for engaging nuts and a distal section for receiving a driving element, and a central axis extending from the proximal section to the distal section, the distal section having a square receiving hole, the proximal section having a recess connecting with the square receiving hole and three radially extending punctures connecting with the recess, the outline of the recess being in the shape of hexagon in the view of a cross-section which is vertical with respect to the central axis, each puncture having a moving part radially movably mounted therethrough, the moving part having a primary end forming a plane surface and a secondary end forming a first arc surface; a ball groove being implemented on the periphery of the main body with a spring and a sphere mounted therein; and a sleeve having an inner wall and being in slide-fitting communication with the outside of the main body, and having a second central axis parallel with the central axis of the main body, the inner wall of the sleeve being provided with three push fronts thereon each corresponding to one moving part, wherein the push front on the inner wall of the sleeve being shaped as continuous steps, the steps of each push front rising gradually from one end to the other, and the inner wall of the sleeve being provided with a plurality cavities thereon, the cavities implemented to have the sphere positionable thereinto, and the distance of the center of two adjacent cavities being equal to the distance of the center of two adjacent steps of each push front; so that the steps of the push fronts are adapted to push the moving parts when the sleeve is moved with respect to the main body.