Patents by Inventor Michael J. Wates

Michael J. Wates 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).

  • Nitrogen/carbon dioxide mixing valves
    Patent number: 4827965
    Abstract: N.sub.2 and CO.sub.2 are admitted, through separate valves actuated by single high hysteresis actuator, into a mixing device when the mixture is fed to a beer keg. The actuator is dependant upon the relative Co.sub.2 N.sub.2 mixture pressures so as to maintain the mixture pressure within predetermined limits and in one embodiment the use of a venturi mixing device ensures that the mixture composition remains substantially constant when the N.sub.2 and CO.sub.2 gases are at substantially different pressure.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: May 9, 1989
    Assignee: Norgren Martonair Limited
    Inventor: Michael J. Wates