Patents by Inventor Chester W. Przeklas

Chester W. Przeklas 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).

  • Evaporative emission control system with vent valve
    Patent number: 5437257
    Abstract: An evaporative emission control system of an internal combustion engine's fuel system including a vent valve. The vent valve provides a mechanism for closing the evaporative emission control system creating a pressure differential between system and atmospheric under various conditions whereby the system can be automatically diagnosed. The vent valve relieves pressure or vacuum in the system that exceeds a threshold necessary to detect the presence of leaks. The vent valve includes a vacuum actuator providing a low restriction flow path for system purges.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: August 1, 1995
    Assignee: General Motors Corporation
    Inventors: Roy A. Giacomazzi, Gregory E. Rich, Chester W. Przeklas, Kenneth W. Turner