Patents by Inventor Lyman V. Root

Lyman V. Root 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).

  • Engine positive crankcase ventilation valve assembly
    Patent number: 4056085
    Abstract: An automotive type internal combustion engine has a positive crankcase ventilation (PCV) valve metering the flow of engine blow-by gases and fumes from the engine crankcase to the intake manifold, the valve having a sonic flow passage providing flow over the entire part throttle operating range of the vehicle to provide a precise flow and predictable calibration of the flow.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: November 1, 1977
    Assignee: Ford Motor Company
    Inventors: Alvin P. Nowroski, Lyman V. Root