Patents by Inventor Edward C. Slade

Edward C. Slade 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).

  • Patent number: 4067540
    Abstract: This invention relates to a valve characterized by a hollow cylindrical body, the interior of which houses a segmented conical plug for axial movement with its apex pointed upstream. A frustoconical seat inside the hollow body also faces upstream and cooperates with similarly shaped surfaces at the base of each plug segment to cam the latter into cone-forming relation upon axial movement thereof in a downstream direction. In closed position these opposed frustoconical surfaces mate to define a continuous annular fluid tight seal. Downstream of the segmented plug subassembly is an externally ribbed tubular slide mounted for limited reciprocating movement in an axial direction back and forth between the axially spaced endwalls of an inwardly opening annular groove. Externally operated means are provided which, upon actuation, shift the slide between its extended upstream position and its retracted downstream one by exerting a suitable axially directed force against the appropriate face of the rib.
    Type: Grant
    Filed: April 7, 1976
    Date of Patent: January 10, 1978
    Inventor: Edward C. Slade