Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 21, 2008
Patent Application Number
11400918
Date Filed
April 10, 2006
Patent Primary Examiner
Patent abstract
A pipe-gripping clamp assembly is provided for use on a top drive unit to grip sections of drilling pipe. The clamp assembly includes of a pair of hinged jaws that are opened and closed by a pair of rams attached to the jaws and the frame members that make up the assembly. Each jaw has a jaw insert that is surfaced to firmly grip a pipe and can be easily replaced once worn beyond service. The rams are either hydraulically or pneumatically operated.
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