Patents by Inventor John C. Estapa

John C. Estapa 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).

  • Pinch valve with inlet and outlet ports
    Patent number: 7118086
    Abstract: A pinch valve includes a body with a passageway extending therethrough, a flexible sleeve mounted within the body and surrounding the passageway, and a cavity between the sleeve and the body. An inlet opening provides control fluid flow into the cavity, while an outlet opening allows for fluid exhaust from the cavity. The diameters of the inlet and outlet openings are fixed, with the inlet diameter being smaller than the outlet diameter. A two-way control valve opens and closes the outlet opening, and thereby controls opening and closing of the pinch valve.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: October 10, 2006
    Assignee: Richway Industries Ltd.
    Inventors: Anthony R. Borglum, John C. Estapa, Corey W. Cerwinske, Richard P. Borglum, Perry R. Anderson