Patent ID: 8555750
Filing Date: 2013-10-15
Classification: B25B

Abstract:
1. An auto-adjustable bearing wrench comprising: a casing that has a plurality of housings; two bearing guide boxes contained within the casing; a plurality of bearings having each an axis; each of the bearing guide boxes comprising a plurality of key-shaped hollow areas; each of the bearings is coupled between the bearing guide boxes introducing the axis in each key, whereby each bearing may be separately displaced inside and outside of its corresponding housing; at least one key in a face of the casing, comprising a spring and a connection cylinder of boxes, the spring is attached in one end to the connection cylinder of boxes and the other end of the casing; wherein the spring pulls the connection cylinder of the boxes in the direction opposite to a torque direction to the torque direction of the casing, whereby the boxes of the bearing guide, through the key-shaped hollow areas and the axis cause the bearings to be displaced to the outmost part of the housings of the receiving casing; and wherein upon rotating the casing in the torque direction the connection cylinder of boxes pushes the spring causing boxes to rotate in the direction opposite to the torque direction to the torque direction, whereby the bearing guide boxes, through the key-shaped hollow areas and the axis cause the bearings to be displaced to the innermost part of the housings of the receiving casing until making contact with a nut placed between the bearings.