Patents by Inventor Wilfried Stroh

Wilfried 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).

  • Device for recovering hydrocarbon vapors in fuel dispensing systems
    Patent number: 5280814
    Abstract: The invention relates to a device for recovering hydrocarbon vapors in fuel delivery systems comprising a proportional throttle valve which is mounted in a vapor recovery line to a tank, with the valve being controlled by an error signal which is a function of the fuel volume flow and the vapor volume flow. Accordingly the vapor volume flow returned by a vacuum pump to the container is controlled. The invention further relates to the structure of the proportional throttle valve, including a tandem piston arrangement.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: January 25, 1994
    Assignee: Ross Europa GmbH
    Inventor: Wilfried Stroh