Patents by Inventor Harry Calhoon Ledebur

Harry Calhoon Ledebur 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).

  • Crank drive system for cold pilger mills drive or the like
    Patent number: 4052898
    Abstract: The disclosure of the present invention relates to a torque and mass compensating counterweight system employed with the drive of a cold pilger rolling mill. The counterweight is connected directly to the crank by a sliding block, displaceable in a slot provided in the counterweight, in which the counterweight is arranged to reciprocate 90.degree. out of phase with the crank and is arranged in guides to move in a plane parallel to the direction of movement of the mill.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: October 11, 1977
    Assignee: Wean United, Inc.
    Inventors: Charles Leroy Miller, Harry Calhoon Ledebur
  • Shell feed system for a cold pilger mill
    Patent number: 4037444
    Abstract: A system for incremently and continuously feeding tubes between dies during a prescribed angle of rotation of a crank assembly in a cold pilger mill. As a main motor drives the crank assembly, a servo-motor, receiving a signal from a digital control unit, which receives a signal from a pulsating encoder associated with the main drive, operates to incremently advance a carriage and shell a controlled predetermined distance between the dies. A reversal of the servo-motor returns the carriage to the initial position in preparation to advance another shell.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: July 26, 1977
    Assignee: Wean United, Inc.
    Inventors: Harry Calhoon Ledebur, Floyd William Diehl, Jr.