Patents by Inventor Robert I. Clarkson

Robert I. Clarkson 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).

  • Check valve hanger mechanism
    Patent number: 4842014
    Abstract: The invention disclosed herein relates to a check valve clapper hanger mechanism from which a check valve clapper may be rotatably suspended in a check valve housing. The check valve clapper hanger mechanism is easily removable from the check valve housing and is capable of maintaining proper alignment of the clapper during normal operation of the check valve.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: June 27, 1989
    Assignee: Wheatley Pump and Valve, Inc.
    Inventors: John L. Strelow, Robert I. Clarkson
  • Corrosion coupon holder apparatus
    Patent number: 4179920
    Abstract: A pipeline corrosion coupon holder apparatus for large diameter pipelines which has a coupon housing assembly mounted adjacent the pipeline with the coupon housing assembly allowing access to a coupon withdrawn from the pipeline for removal and replacement of the coupon through the coupon housing assembly without removal of the coupon through a shaft housing assembly which has a reciprocally mounted shaft for insertion and retrieval of the coupon from the large diameter pipeline.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: December 25, 1979
    Assignee: Geosource, Inc.
    Inventors: Ronald A. Schuller, Robert I. Clarkson