Patents by Inventor Julius F. Marquardt

Julius F. Marquardt 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).

  • Coupling for a planetary ring gear
    Patent number: 4656890
    Abstract: The planetary gear system includes a drive shaft extending rotatably through a hollow spindle which is fixed and a system of planetary gears driven by gear teeth on the shaft. The planetary gears operate within a stationary ring gear which is secured to the spindle by meshed, wedge-shaped, coupling teeth that are held in engagement to eliminate relative rotational movement therebetween.
    Type: Grant
    Filed: December 19, 1985
    Date of Patent: April 14, 1987
    Assignee: Dresser Industries, Inc.
    Inventor: Julius F. Marquardt
  • Automatic control of lockable differentials
    Patent number: 4070924
    Abstract: A pilot source of fluid pressure allows the engagement of a lockable differential into a locked mode in response to a pressure signal directed to it. Metering of the signal is related to the operating condition of the implements being carried by the vehicle regardless of operator initiation of the differential locking control.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: January 31, 1978
    Assignee: International Harvester Company
    Inventors: Emil F. Moreno, Ralph S. Hajek, Julius F. Marquardt