Patents by Inventor Sonja Bolek

Sonja Bolek 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).

  • Patent number: 4899782
    Abstract: A steam pressure cooker (1) is described, which is provided with a lid (2) and a pressure relief valve (8), comprising a valve seat (7a), a valve body (9) adapted to have a load applied thereto in the direction of the valve seat (7a) by means of a spring (11) and an adjustable spring abutment (12), which is adapted to be displaced from an operative position in which the valve body (9) is pressed onto the valve seat (7a) to a steam-discharge position in which the valve body (9) is relieved of the load to such an extent that the steam can escape and which, for the purpose of cleaning, can be removed from the lid (2) to such an extent that the pressure relief valve (8) is freely accessible.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: February 13, 1990
    Assignee: WMF Wurttembergische Metallwarenfabrik AG
    Inventors: Jurgen Krejza, Eberhard Roth, Sonja Bolek