Patents by Inventor Philip C. Chin

Philip C. Chin 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).

  • Force motor with contoured spring coupling
    Patent number: 4563664
    Abstract: A direct drive valve wherein a force motor (10) controls the position of a valve slide (20) through a linkage (14). The force motor includes a spring assembly (62) having cantilevered springs (68 and 70) that include petals (72). The armature (48) of the force motor is guided by a plurality of balls (84) that contact both an internal tube assembly (47) and the armature.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: January 7, 1986
    Assignee: Parker-Hannifin Corporation
    Inventors: Philip C. Chin, Charles T. Lindsey