Patents by Inventor F. Y. Yang

F. Y. Yang 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).

  • Apparatus for sensing liquid level
    Patent number: 6067854
    Abstract: The level of liquid in a tank is sensed using a pair of magnets arranged such that when in proximity to each other, a magnetic force is generated that activates a micro-switch. One of the magnets is mounted on a float carried on the surface of the liquid and constrained for vertical movement within a tube. The second magnet is stationarily mounted on the tube at a position where the liquid level is to be sensed. A latch mechanism actuated by the movement of the second magnet latches the micro-switch in an actuated position until actuated by the second magnet a second time.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: May 30, 2000
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventor: F. Y. Yang