Patents by Inventor Mark Y. F. Chow

Mark Y. F. Chow 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: 7415737
    Abstract: An automatic flushing system is equipped with a buoyancy mechanism to unseat a valve set in a tank of a toilet. The automatic flushing system, equipped with battery power, includes sets of sensing, actuating, latching, buoyancy, unseat/seat and valve members. The battery power only provides electrical power to sensing and actuating members to release a float from an engaged position to a release position. Thus, the buoyancy of the float may unseat a valve to open a drain of the tank.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: August 26, 2008
    Inventors: Raymond Yinghui Hung, Mark Y. F. Chow