Patents by Inventor Fritz E?feld

Fritz E?feld 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).

  • Pressure relieved thermal regulator for air conditioning application
    Patent number: 7909262
    Abstract: According to one embodiment of the invention, a control valve for regulating temperature comprises a conduit, a fluid limiter, a restoring actuator, an opening actuator, and a restoring actuator chamber. The conduit has an inlet, an outlet, and an opening between the inlet and the outlet. The inlet is operable to receive fluid into the conduit and the outlet is operable to dispense of fluid out of the conduit. The fluid limiter is operable to at least partially cover the opening and thereby resist flow of fluid through the opening. The restoring actuator is operable to provide a force that moves the fluid limiter toward the opening to resist flow of fluid through the opening. The opening actuator is operable to provide a second force that moves the fluid limiter away from the opening to allow the flow of fluid through the opening. The opening actuator is activated based on a temperature of fluid in the conduit.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: March 22, 2011
    Assignee: Flow Design, Inc.
    Inventors: Fritz Eβfeld, Bernhard Henke, Karl-Heinz Brinkmann, John M. Trantham