Patents by Inventor Willfried Stroh

Willfried Stroh 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 means, in particular for returning fuel vapor
    Patent number: 5267721
    Abstract: The present invention relates to a proportional valve, in particular for fuel dispensing systems, to recover fuel vapor to the gas station tank. According to the invention the valve member is defined by a tandem piston arrangement to increase safety and accuracy in controlling the vapor volume to be recovered. The invention further relates to a valve arrangement for fuel dispensing systems having a plurality of fuel nozzles.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: December 7, 1993
    Assignee: Ross Europa GmbH
    Inventor: Willfried Stroh