Patents by Inventor Michael J. Birmingham

Michael J. Birmingham 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).

  • Tourniquet with differential pressure occlusion detector
    Patent number: 4520819
    Abstract: An automatic tourniquet with an improved occlusion detector. A pump and valve for inflating and deflating a tourniquet cuff are connected to a first port. A pressure transducer for sensing the pressure in the cuff is connected to a second port. A pair of pressure differential switches, which activate an alarm when a pressure difference developes across them, are connected anti-parallelly between the pump/valve and the transducer. The differential switches also deactivate the pump/valve upon detection of an occlusion.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: June 4, 1985
    Assignee: Aspen Laboratories, Inc.
    Inventors: Michael J. Birmingham, Michael R. Manes