Patents by Inventor Robert L. Bowlby

Robert L. Bowlby 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).

  • Butterfly valve
    Patent number: 4398696
    Abstract: This invention concerns a butterfly valve having a resilient, adjustable seat for pivoting disc. The seat comprises an elastomeric seating attached to a clamping ring which slides along the walls of the first portion of the flow passage extending through the body. A plurality of actuators extend through the clamping ring and seat ring into an axial annular wall to initially compress the seat ring. The flow passage is configured so that the axial wall of the clamping ring is uniformly exposed to the fluid pressure in the first passage portion.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: August 16, 1983
    Assignee: General Signal Corp.
    Inventors: Dezso Szilagyi, John P. Cunningham, Robert L. Bowlby