Patents by Inventor Derek W. Hillyard

Derek W. Hillyard 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).

  • Drive mechanism for the main spindle of a rotating tool turret machine
    Patent number: 4621405
    Abstract: A drive mechanism for the main spindle of a rotating tool turret machine, including a drive motor driving a worm carried in an eccentric mounting, rotation of the mounting effecting movement of the worm in an arcuate path into or out of engagement with a worm wheel.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: November 11, 1986
    Assignee: The 600 Group Public Limited Company
    Inventors: Peter H. Cook, Derek W. Hillyard