Patents by Inventor David Norman Richter

David Norman Richter 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).

  • Thermal trip assembly and method for producing same
    Patent number: 6803850
    Abstract: A heater element for use in a circuit breaker whose initial shape can be varied to achieve various trip ratings for different circuit breakers. The material composition of the heater element and the bimetal strip indirectly heated by the heater element are kept the same. The electrical resistance presented to current passed through the heater element is varied by varying the shape of the heater element. The shape of one heater element relative to another heater element varies according to one geometric parameter. The geometric parameter may be surface geometry, thickness, or cross-sectional area.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: October 12, 2004
    Assignee: Square D Company
    Inventor: David Norman Richter
  • THERMAL TRIP ASSEMBLY AND METHOD FOR PRODUCING SAME
    Publication number: 20040070483
    Abstract: A heater element for use in a circuit breaker whose initial shape can be varied to achieve various trip ratings for different circuit breakers. The material composition of the heater element and the bimetal strip indirectly heated by the heater element are kept the same. The electrical resistance presented to current passed through the heater element is varied by varying the shape of the heater element. The shape of one heater element relative to another heater element varies according to one geometric parameter. The geometric parameter may be surface geometry, thickness, or cross-sectional area.
    Type: Application
    Filed: October 10, 2002
    Publication date: April 15, 2004
    Inventor: David Norman Richter