Patents by Inventor E. Martin McKinnon

E. Martin McKinnon 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).

  • Capacitive pressure transducer having reduced output error
    Patent number: 6223603
    Abstract: A fluid pressure sensor (10) includes a capacitive pressure sensing element (12) having a thin, relatively flexible ceramic diaphragm (14) mounted in closely spaced apart relation to a rigid ceramic substrate (16) by a glass annulus (18) mounted in a housing (28) having a port (28a) for fluid whose pressure is to be sensed by being received on an outer face (12a) of the diaphragm. An electronic circuit (36) is mounted in a chamber (20a) formed between a connector (20) and an outer face (12b) of the substrate. An electrically conductive coating (14b) is placed on the outer face (12a) of the diaphragm and an annular electrically conductive gasket (30) is disposed between the diaphragm and the bottom floor (28c) of the housing surrounding a fluid inlet (28a) in order to effect an electrical path between the conductive layer on the diaphragm and the housing.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: May 1, 2001
    Assignee: Texas Instruments Incorporated
    Inventor: E. Martin McKinnon