Patents by Inventor Cletis P. Pinkerton

Cletis P. Pinkerton 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).

  • Cutter bit assembly with resilient bit retainer
    Patent number: 4755003
    Abstract: The present invention relates to a cutter bit assembly of the type for use utilized in excavating machines such as in mining, road scarifying, concrete cutting and the like. More specifically, the invention relates to such assembly including a mounting block member having an axial bore extending therethrough adapted to rotatably receive a cutter bit member, and with a polymeric retainer member for preventing axial dislodgment of the cutter bit member during use thereof.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: July 5, 1988
    Inventors: Cletis P. Pinkerton, Robert L. Morris
  • Cutter bit device
    Patent number: 4684176
    Abstract: The present invention relates to cutter bit devices and more particularly to cutter bit devices of the type for detachable connection to a rotatable member such as an excavating wheel, chain cutter, cement saw or the like for various excavating operations as in road planing or scarifying, long-wall coal mining, sawing concrete or the like.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: August 4, 1987
    Inventors: Leroy E. Den Besten, Cletis P. Pinkerton
  • Retainer system for roof-mine tool bit
    Patent number: 4474488
    Abstract: A retainer system for detachably coupling a drill bit to a drill steel member when the drill bit is provided with key-way recess portions adapted to telescopingly and/or rotatably receive an interlocking relationship therein correspondingly shaped key-way members carried by the drill steel member.
    Type: Grant
    Filed: May 12, 1983
    Date of Patent: October 2, 1984
    Assignee: Mining Tools Div. of Smith International, Inc.
    Inventors: Cletis P. Pinkerton, Robert L. Morris
  • Mining bit with improved split ring retainer
    Patent number: 4462638
    Abstract: In a mining machine or the like which incorporates cutting bits having conically shaped heads and located in sockets of bit holders having respective wear sleeves located on the shanks of the bits with the bit free to rotate with the sleeve interposed between the socket preventing wear mount; a retainer is provided maintained by the mount and engageable with a receptacle on the sleeve to insure against undesired ejection of the bit.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: July 31, 1984
    Inventors: Leroy E. DenBesten, Cletis P. Pinkerton