Patents by Inventor Zhongyan Lv

Zhongyan Lv 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).

  • Automatic drain
    Patent number: 7530123
    Abstract: An automatic drain device for a sink and especially a sink without an overflow hole is provided. The device includes a magnetically controlled valve to open a return path for the flow of overflow fluid to the draining pipe. When the sink is about to overflow, water pressure increases causing the valve in the magnetically controlled valve to open a bypass path to the drain.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: May 12, 2009
    Inventors: Zheng Cao, Zhongyan Lv
  • AUTOMATIC DRAIN
    Publication number: 20080098516
    Abstract: An automatic drain device for a sink and especially a sink without an overflow hole is provided. The device includes a magnetically controlled valve to open a return path for the flow of overflow fluid to the draining pipe. When the sink is about to overflow, water pressure increases causing the valve in the magnetically controlled valve to open a bypass path to the drain.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 1, 2008
    Inventors: Zheng CAO, Zhongyan LV