Patents by Inventor Donald A. King

Donald A. King 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).

  • Flow proportional conveyor drive system
    Patent number: 4187958
    Abstract: A digital, open loop control system for a very low speed conveyor which deposits contaminants in a fluid used to test a hydraulic component. The digital control system senses the rate of fluid flow through the component and advances the conveyor in proportion to the fluid flow rate.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: February 12, 1980
    Assignee: Abex Corporation
    Inventor: Donald A. King