Patents by Inventor Karl Lieberth

Karl Lieberth 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).

  • Device for regulating or limiting at least one temperature value or a temperature range of radiation or contact heaters of electric cooking apparatus
    Patent number: 4603981
    Abstract: A device for regulating or respectively limiting the temperature provided an electric heating element in cooking apparatus. At least one temperature sensor is provided for regulating or respectively limiting the temperature, the sensor having a rod of high thermal expansion which is disposed in a tube of low thermal expansion, the tube being held between holding elements. A support member adjoins each end of the tube and surrounds the rod. The holding elements are alongside each of the support members. The support member has a coefficient of thermal expansion .alpha..sub.1 which is smaller than a coefficient of thermal expansion .alpha..sub.2 of the adjoining holding element and larger than the coefficient of thermal expansion .alpha..sub.3 of the tube.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: August 5, 1986
    Assignee: Electrovac, Fabrikation elektronischer Spezialartikel Gesellschaft m.b.H.
    Inventor: Karl Lieberth