Patents by Inventor David Alexander McCloskey

David Alexander McCloskey 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).

  • Mine roof drill bit and cutting insert therefor
    Patent number: 5996715
    Abstract: A rotary roof mine bit for drilling holes in the roof of a mine, comprises a bit body and an insert mounted in the bit body. The insert is formed of a hard material such as carbide or diamond. A top surface of the insert comprises two top sections which intersect a respective main surface of the insert to define first and second non-linear cutting edge. In one embodiment each cutting edge comprises a plurality of mutually angled segments. In another embodiment each cutting edge is continuously curved. Preferably an axial notch is disposed at a center of the top surface.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: December 7, 1999
    Assignee: Sandvik Rock Tools, Inc.
    Inventors: Kent Peay, David Alexander McCloskey, Jan Magnus Andersson
  • Mine roof drill bit and cutting insert therefor
    Patent number: 5829540
    Abstract: A rotary roof mine bit for drilling holes in the roof of a mine, comprises a bit body and an insert mounted in the bit body. The insert is formed of a hard material such as carbide or diamond. A top surface of the insert comprises two top sections which intersect a respective main surface of the insert to define first and second non-linear cutting edge. In one embodiment each cutting edge comprises a plurality of mutually angled segments. In another embodiment each cutting edge is continuously curved. Preferably an axial notch is disposed at a center of the top surface.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: November 3, 1998
    Assignee: Sandvik Rock Tools, Inc.
    Inventors: Kent Peay, David Alexander McCloskey, Jan Magnus Andersson