Patents by Inventor Norm L. Robbins

Norm L. Robbins 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).

  • Segmented seat retainer for valves
    Patent number: 6244567
    Abstract: A retaining ring for a resilient valve seat carried on a movable valve member is provided in a plurality of segments which may be cast in an investment casting method. The ring segments may be identical in shape and may overlap one another, with threaded fasteners securing the ring segments to the valve member. Concentric grooves may be provided on a face of the ring segments which engage the resilient valve seat to prevent its movement or displacement relative to the valve member.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: June 12, 2001
    Assignee: Val-Matic Valve & Manufacturing Corp.
    Inventor: Norm L. Robbins