Patents by Inventor Hiram H. Fisher, Jr., deceased

Hiram H. Fisher, Jr., deceased 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).

  • Slack adjustment for slip system in downhole well apparatus
    Patent number: 4444252
    Abstract: A well packer having a radially extendable and retractable resilient annular sealing element and slip assembly includes a slack adjusting mechanism for maintaining the cooperating slip cones and slip members in an axially adjusted position to reduce radial play in the slip members when the slip assembly is in the retracted condition. The slack adjusting mechanism includes an internal threaded sleeve threadedly engaged with an integral tubular portion of the upper slip cone. The sleeve is disposed between the slip assembly and the sealing element and includes an annular seal urging shoulder formed thereon.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: April 24, 1984
    Assignee: Baker International Corporation
    Inventor: Hiram H. Fisher, Jr., deceased