Patents by Inventor Han C. Chung

Han C. Chung 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).

  • Patent number: 4628441
    Abstract: An automatic dynamic error compensator for compensating the position error arising within a servo drive system includes a measuring head which is operative to measure the relative indicated position of two or more measuring vanes on the movable member. The measuring head, together with a feedback transducer, that measures indicated movable member position, are coupled to a feedback system. The feedback system determines the indicated movable member position from the feedback transducer reading and then compares the indicated movable member position to the known vane position upon occurrence of a vane crossing to yield a compensating value.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: December 9, 1986
    Assignee: Kearney & Trecker Corporation
    Inventors: Richard Johnstone, Edward E. Kirkham, Han C. Chung, Lyle D. Ostby