Patents by Inventor Kamezawa Jiro

Kamezawa Jiro 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).

  • Butterfly valve to prevent dew condensation therefrom
    Patent number: 5150731
    Abstract: A butterfly valve having a thermal break point located in the shaft cylinder portion through which the valve stem passes is shown and described. The thermal break is a heat insulating material which may be non-metallic, a plastic, and an electrical insulator. The portion of the shaft cylinder extending out of an insulating core is made of insulating material and connected to metallic parts of the valve shell structure by gluing, vibration melting adhesion, and mechanical overlapping methods.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: September 29, 1992
    Assignee: Tomoe Technical Research Co.
    Inventor: Kamezawa Jiro