Patents by Inventor Harold V. Hamilton

Harold V. Hamilton 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).

  • Method of coinjection molding of thermoplastic and thermoplastic elastomer
    Patent number: 4385025
    Abstract: Vibration isolators are manufactured by a co-injection molding process. Outer and inner parts of the isolators are molded first from a rigid or stiff thermoplastic material such as polystyrene and intermediate spring-like parts of the isolators are made of a thermoplastic elastomer such as copolymer of butadiene and styrene formed and bonded to the outer and inner parts in a subsequent molding step.
    Type: Grant
    Filed: October 20, 1980
    Date of Patent: May 24, 1983
    Assignee: Barry Wright Corporation
    Inventors: Charles M. Salerno, Harold V. Hamilton, Dale W. Schubert
  • Hydraulic clamp
    Patent number: 4265434
    Abstract: A hydraulic clamp comprising an assembly of concentrically-arranged parts wherein axial movement of a first part effects rotation of a second part and axial movement of a third part effects a corresponding axial movement of the second part and wherein the first part controls supply of pressure fluid to the third part so that rotation is first imparted to the second part and thereafter axial movement is imparted thereto and wherein a clamp arm is fixed to said second part.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: May 5, 1981
    Assignee: Barry Wright Corporation
    Inventors: Harold V. Hamilton, Harold A. Melendy
  • Two stage intensifier
    Patent number: 4249380
    Abstract: A two-stage intensifier system for use in conjunction with a pressure-operable swing clamp or other pressure-operable device for supplying fluid pressure at a relatively low pressure to perform a first operation and thereafter to supply fluid pressure at a higher pressure to perform a second operation.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: February 10, 1981
    Assignee: Barry Wright Corporation
    Inventors: Harold A. Melendy, Harold V. Hamilton