Patents by Inventor Glen D. Brunner

Glen D. Brunner 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).

  • Low cost pressure transducer particularly for medical applications
    Patent number: 5522266
    Abstract: A pressure transducer (10) for measuring fluid pressure in a fluid path comprising a strain gauge circuit (37) of thick film piezoresistors formed on an alumina diaphragm (36) in a Wheatstone bridge configuration. Each resistance leg of the bridge typically includes a thick film measuring piezoresistor (R1A) to which selected thick film patch-in piezoresistors (R1B, R1C, R1D, R1E) are selectively connected to create a measuring resistance network (PN1). The measuring resistance network is adjusted to a predetermined resistance value to balance and optimize the electrical symmetry of the bridge. The pressure transducer (10) includes a mechanical stop member (46) located adjacent the alumina diaphragm (36) such that the fully deflected diaphragm contacts the stop thereby physically preventing the diaphragm from deflecting an amount that would cause the diaphragm to rupture.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: June 4, 1996
    Assignee: Medex, Inc.
    Inventors: Warren B. Nicholson, Charles R. Patzer, Thomas P. Frank, Dennis M. Tomisaka, Glen D. Brunner, John C. Toomey, Michael P. Eland