Patents by Inventor Virgil J. Waldorf

Virgil J. Waldorf 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).

  • Air control valve
    Patent number: 4592100
    Abstract: An air control valve is provided for use in a spa to regulate the flow of air to a hydrotherapy jet in which a recessed control knob is accessible at a rim of the spa to actuate a movable valve member to selectively constrict or dilate an air flow passage through the valve body which has an air intake opening underneath the spa rim to isolate the noise associated with the intake opening from the user.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: June 3, 1986
    Assignee: Jacuzzi Inc.
    Inventors: Joeab A. Robertson, Virgil J. Waldorf, Robert D. Wilkes, Joe D. Pucket