Patent ID: 6073520
Filing Date: 2000-06-13
Classification: B25B

Abstract:
A wrench for removing stud bolts that are damaged in place such as lost the bolt head, bolt shank is broken, comprising:a socket assembly having a housing with upper and annular walls defining inner and outer openings through which the damaged stud bolt is placed and wherein said annular wall has an inner cam-shaped surface with at least two cam members inwardly protruded and each of said cam members are defined by two curved sides ending in an edge;a tubular handle assembly perpendicularly mounted to said socket assembly and wherein said tubular handle assembly includes a tubular member rigidly and perpendicularly mounted, at one end, to said upper wall and a wrench-engaging member, at the other end, and wherein said wrench engaging member has a plurality of engaging faces that are disposed in such manner that a conventional wrench engages them to actuate said stud bolt wrench and said damaged stud bolt,at least two gripping toothed dog members removably mounted inside said housing of said socket assembly and said gripping toothed dog members have an arcuate configuration with outer convex surface and inner concave toothed surface, said gripping toothed dog members having an angular displacement along said inner surface, and wherein said concave surface of said dog member is biased toward said cam-shaped inner surface of said housing when a user actuates said handle and socket assemblies, and wherein the angular displacement of said dog members are limited by said curved sides and the edge of said cam member and wherein said concave toothed surface has a plurality of gripping teeth which are brought in contact with the exposed surface of said damaged stud bolt and firmly grip said exposed surface when a user actuates said handle and socket assemblies and an angular displacement occurs.