Patents by Inventor Johnny D. Mitchell

Johnny D. Mitchell 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).

  • Continuous rotation hydraulic grapple
    Patent number: 4426110
    Abstract: An upper head connector for support from a crane boom is provided and has a depending head journaled therefrom for reversible continuous rotation relative thereto about an upstanding axis. A rotator (motor) is supported from the head connector and includes an upper portion supported from the head connector and a lower rotatable portion supported from the upper portion for reversible continuous rotation relative thereto about an axis at least substantially coinciding with the first mentioned axis. Connecting structure is provided establishing a driving connection between the lower portion of the rotator and a lower level portion of the head for rotary drive of the latter by the rotator independent of support of any appreciable downward loading of the weight of the head or a load supported therefrom on the rotator lower portion.
    Type: Grant
    Filed: September 17, 1981
    Date of Patent: January 17, 1984
    Assignee: Mar Hook & Equipment, Inc.
    Inventors: Johnny D. Mitchell, Hugh D. Armstrong