Patent ID: 7721628
Filing Date: 2010-05-25
Classification: B25B,E21B

Abstract:
1. A circumferential gripping tool comprising: a plurality of gripping segments defining a first and a last segment, each segment being formed from plural identical steel plates, the segments being interconnected by hinge pins at respective ends thereof, the plates of adjacent sections being interleaved at said ends, each segment having a retaining slot for receiving a gripping jaw; a plurality of replaceable gripping jaws, a single one for each of said gripping segments, each gripping jaw being retained within the retaining slots of all of the plates forming the respective segment, and the tool further comprising; a handle assembly consisting of a lever and a head, the lever having a hole at a proximal end, the head having a hole defining a pivot point retaining one end of said first segment by a steel pin, said last segment having at least one heel shaped to suitably engage a contact point of said head, said contact point concealed and constrained between at least two of said identical steel plates of said first segment; wherein said handle assembly connected to said first segment and engaging said last segment applies a crushing force to a workpiece when a force is applied to said handle.