Patents by Inventor Hiram H. Fisher, Jr.

Hiram H. Fisher, Jr. 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: 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
  • Patent number: 4289200
    Abstract: A retrievable well packer includes telescopingly interfitted housing and mandrel members movable one relative to the other to actuate the seal and anchor systems for setting the packer. A locking mechanism for holding the packer in the set position includes a cylindrical lock ring having axially spaced ratchet teeth, referred to in the art as wickers, on an outer circumferential surface engageable with cooperating internal axially spaced ratchet wickers formed on the housing member. The lock ring also includes axially spaced teeth on an inner circumferential surface engageable with cooperating teeth on a collapsible latch system engaged with the mandrel which may be collapsed radially inwardly to release the lock ring with respect to the mandrel to permit relative movement between the mandrel and the housing to release the packer elements from engagement with the casing.
    Type: Grant
    Filed: September 24, 1980
    Date of Patent: September 15, 1981
    Assignee: Baker International Corporation
    Inventor: Hiram H. Fisher, Jr.