Patents by Inventor Brian Dudley Harper

Brian Dudley Harper 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).

  • Screw-threaded cutting dieheads
    Patent number: 3977032
    Abstract: A diehead for use on a machine tool for cutting screw threads and having thread chaser carriers mounted on a body for pivotal movement about spaced parallel axes, means being provided for pivoting the carriers through a range of movement between operative and inoperative positions. The diehead includes locking means arranged so as normally to retain the carriers in position in the body and to permit removal of the carriers in an axial direction when they are pivoted beyond said range of movement.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: August 31, 1976
    Assignee: Alfred Herbert Limited
    Inventors: Denis Alfred Newell, Kenneth Atkins, Brian Dudley Harper