Patents by Inventor John M. Gerula

John M. Gerula 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 operated switch assembly with external pressure control
    Patent number: 4626636
    Abstract: A pressure-operated electric switch assembly of the diaphragm type wherein a housing mounted diaphragm actuates a snap action switch adjustable in the housing to vary the switch operating pressure. The pressure setting may be varied externally by the user upon manual rotation of a switch sealing boot and the setting may be visually observed from indicia surrounding the housing that cooperate with a pointer on the boot.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: December 2, 1986
    Assignee: Stewart-Warner Corporation
    Inventors: Ronald J. Hickman, John M. Gerula