Patents by Inventor Richard J. Hance

Richard J. Hance 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).

  • Expandable phase change detector device
    Patent number: 4274284
    Abstract: An expendable phase change detector device is provided with an initial coating on the twisted wire forming the thermocouple junction which is, in turn, covered by a refractory coating during the manufacture of the device. The initial coating responds to an increased temperature to ablate the refractory coating from the thermocouple junction when molten metal is poured into the device.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: June 23, 1981
    Assignee: Leeds & Northrup Company
    Inventor: Richard J. Hance
  • Expendable immersion thermocouple
    Patent number: 4229230
    Abstract: An expendable immersion thermocouple having a cup-shaped body member for supporting the thermocouple and providing a cavity into which a refractory cement is poured to secure the thermocouple in place. The refractory cement is nonhomogeneous and has a surface region which is substantially composed of a high temperature refractory material such as alumina.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: October 21, 1980
    Assignee: Leeds & Northrup Company
    Inventor: Richard J. Hance
  • Means for assembling expendable immersion thermocouples
    Patent number: 4179309
    Abstract: An expendable immersion thermocouple having a ceramic body member and a plastic tailpiece for supporting the thermocouple and producing a cavity into which a refractory cement is poured to secure the thermocouple in place. The tailpiece is provided with axially-extending resilient arms with enlarged end portions to serve as latching devices to temporarily hold the tailpiece to the ceramic body.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: December 18, 1979
    Assignee: Leeds & Northrup Company
    Inventors: Richard J. Hance, John R. Wiese