Patents by Inventor Stuart C. Leach

Stuart C. Leach 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).

  • Anaesthetic vaporizer having a pressure sensitive diaphragm connecting the anaesthetic reservoir and vaporizing chamber
    Patent number: 5390665
    Abstract: An anaesthetic vaporizer includes a passageway 10, 30 for directing carrier gas through a fixed laminar restrictor 32 to a vaporizing chamber 26. Liquid anaesthetic agent is injected into the vaporizing chamber 26 from a constant level tank 12 the output of which is controlled by a laminar control valve 28. Liquid anaesthetic agent flow is determined by the pressure of carrier gas in the passageway 10, 30 and the setting of the liquid laminar control valve 28.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: February 21, 1995
    Assignee: The BOC Group plc
    Inventor: Stuart C. Leach
  • Anaesthetic vaporisers
    Patent number: 4919125
    Abstract: An anaesthetic vaporiser 1 the by-pass type includes a thermally responsive valve 52 in its second by-pass stream which valve 52 is located immediately below the sump 12 of the vaporiser. This offers the advantage that any difference in temperature between the valve 52 and liquid anaesthetic contained in the sump 12 is very small even when the liquid anaesthetic temperature is changing rapidly. Furthermore, the valve 52 is readily accessible for maintenance and calibration.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: April 24, 1990
    Assignee: BOC Group PLC.
    Inventors: Robert A. Heaton, Stuart C. Leach, Joseph Hancock, Neil A. Sandy