Patents by Inventor Jeffrey S. Stephens

Jeffrey S. Stephens 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).

  • Self-vacuum arrangement for pneumatic equipment
    Patent number: 7343848
    Abstract: A self-vacuum arrangement for pneumatic equipment is provided. A Venturi device having first and second ports and a central tap is provided. A first check valve having a first port operably coupled with the central tap of the Venturi device is configured to prevent pneumatic flow from the central tap through the first check valve. Optionally included is a second valve having a first port operably coupled with the first port of the Venturi device, and a second port operably coupled with the second port of the Venturi device.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: March 18, 2008
    Assignee: Norgren, Inc.
    Inventors: Patrick Maher, Jeffrey S. Stephens