Patents by Inventor Donald Lee Barnett

Donald Lee Barnett 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).

  • Valve mechanism with improved sealing
    Patent number: 5762316
    Abstract: A dispensing valve suitable for food processing and other applications has a valving plunger formed as an integral part of a pneumatic piston. A valve seat receives the plunger end of the piston to perform a valving operation. The remainder of the piston includes chambering for pressurized air flow, moving the piston back and forth so as to operate the valve between closed and open positions.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: June 9, 1998
    Assignee: Kraft Foods, Inc.
    Inventor: Donald Lee Barnett