Patents by Inventor James L. Frazierr

James L. Frazierr 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).

  • Z-axis drive assembly
    Patent number: 3975109
    Abstract: A Z-axis drive assembly for a turret machining center incorporates a variable speed DC motor mounted on a vertically adjustable carriage and connected through a harmonic drive unit to rotate a pinion. The pinion forms part of a rack and pinion mechanism, for controlling the vertical elevation of the rack relative to the carriage.
    Type: Grant
    Filed: August 29, 1975
    Date of Patent: August 17, 1976
    Assignee: Houdaille Industries, Inc.
    Inventor: James L. Frazierr