Patents by Inventor A. Richard Ayers

A. Richard Ayers 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).

  • Filter with shut-off valve
    Patent number: 6120683
    Abstract: A filter includes a housing having an inlet and an outlet. A filter core including a filter media is movably disposed within the housing with the inlet and the outlet in fluid communication with opposite sides of the core and a pressure responsive surface in fluid communication with said inlet. The filter also includes a valve supported on the filter core and moveable into a sealing position to prevent fluid from passing to the outlet when said core moves within said housing response to fluid pressure acting against said pressure responsive surface.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: September 19, 2000
    Assignee: Central Illinois Manufacturing Company
    Inventors: David Reinhart, A. Richard Ayers