Patents by Inventor Earl F. Bullock

Earl F. Bullock 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).

  • Pipe joint restrainer glands
    Patent number: 4568112
    Abstract: A restraining ring and gland for a mechanical joint with a plain plastic pipe end including two semi-circular members securable together by lateral end flanges and having a cylindrical tapered bore having a roughened surface and provided with longitudinally spaced internal annular blunt edged ribs for gripping the plastic pipe without cutting the pipe surface. When the PVC pipe is coupled to iron pipe, one gland is used. When the PVC pipe is connected to a PVC bell or fitting, two glands are used secured together by longitudinal bolts.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: February 4, 1986
    Assignee: Ebba Iron Inc.
    Inventors: Earl C. Bradley, Jr., Jack Burkholder, Earl F. Bullock