Patents by Inventor Gary S. Urich

Gary S. Urich 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: 4974112
    Abstract: Apparatus for improving the performance of conventional electromagnetic reclosing relays under continuous lower magnitude ground or phase faults in electrical power distribution systems. An incomplete sequence relay is connected to the reclosing relay to render the timing drum or cam of the reclosing relay operative when the contacts of the circuit breaker are open, and to reset the reclosing relay after a selected time interval when the breaker is closed. This arrangement prevents timing problems associated with lower magnitude faults which otherwise keep the reclosing relay from reaching its lockout condition.
    Type: Grant
    Filed: May 10, 1989
    Date of Patent: November 27, 1990
    Inventor: Gary S. Urich