Patents by Inventor Douglas B. Vonderhaar

Douglas B. Vonderhaar 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).

  • Water shut-off valve
    Patent number: 4742841
    Abstract: A coolant system and control valve used in a circuit for cooling spot welding tips. The control valve normally passes coolant to and from the tips. Should a break in the coolant flow occur because of a breakdown of one or more of the tips, the control valve will shift to close the normal coolant loop and divert coolant from a pressure source to a tank until a repair is made. A switch indicator can be utilized for visual observation of a break and also a flow indicator is provided on the valve body to indicate normal coolant flow.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: May 10, 1988
    Assignee: Numatics, Incorporated
    Inventors: Douglas B. Vonderhaar, Donald E. McGeachy