Patents by Inventor Cooper L. Dunn

Cooper L. Dunn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4715456
    Abstract: A hydraulically actuated slip assembly having a slip pivotally connected at its sides by parallel links to the side surfaces of a slip block with slip engaging surfaces which allow the slip to be engaged and disengaged from tubing or pipe and operated within a reduced area. An alternative embodiment utilizes a floating die to allow the parallel links to disengage the slip from the pipe in a compact configuration.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: December 29, 1987
    Assignee: Bowen Tools, Inc.
    Inventors: Frank E. Poe, Jr., Dan R. Schwertner, Cooper L. Dunn, Melvyn F. Whitby