Patents by Inventor Russell H. Clack

Russell H. Clack 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: 5216849
    Abstract: Apparatus and method for field sandblasting the exterior surface of pipe to be wrapped or coated and installed underground. Abrasive granular material is forced by compressed air through a plurality of hoses to a plurality of respective nozzles. The nozzles direct the granular material into a plurality of blast tubes radially extending from a sandblast chamber through which is inserted the pipe to be cleaned. As the pipe is passed through the sandblast chamber, its surface is uniformly impinged, cleaned and etched by the granular material propelled through the blast tubes. After impinging the pipe, the granular material exits the sandblast chamber by gravity through a discharge chute.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: June 8, 1993
    Assignee: Navajo Refining Company
    Inventors: Russell H. Clack, Stanley Davis, Ricki L. Berry