Patents by Inventor Frederick Frank Oligschlaeger

Frederick Frank Oligschlaeger 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).

  • Hydraulic system for broadcast spreader
    Patent number: 4098433
    Abstract: A broadcast spreader having one or more spinners driven by hydraulic motors and a material delivery conveyor or auger driven by a hydraulic motor is provided with a hydraulic system including a flow and pressure-compensated variable displacement pump and pressure-compensated control valves respectively for the spinner and conveyor motors connected so that the volume of fluid delivered by the pump corresponds to the demands of the motors.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: July 4, 1978
    Assignee: Dickey-john Corporation
    Inventor: Frederick Frank Oligschlaeger