Patents by Inventor Raymond P. Robinson

Raymond P. Robinson 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).

  • Modular ball head remover
    Patent number: 5264680
    Abstract: An apparatus and method for removing a modular ball head from a prosthesis stem by heat expanding the modular ball head and subjecting it to an impact force in a direction such that it is removed from the prosthesis stem. A housing receives the modular ball head therein while the prosthesis stem is still within a patient's femur. A heater within the housing heats the modular ball head. An impact hammer comprised of a mass slideably mounted on a rod is attached to the housing and has an anvil stop at one end. The housing is thermally insulated to retain heat while protecting an operator and the patient from burns. The heat generated is controlled as to amount and duration.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: November 23, 1993
    Assignee: Virginia Mason Clinic
    Inventors: Horst R. Seibold, Raymond P. Robinson