Patents Assigned to Tomoe Technical Research Co.
  • 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