Patents by Inventor Qingyong Cai

Qingyong Cai 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).

  • Part of toilet bowl for removing foul odor of excrement
    Publication number: 20120311775
    Abstract: A toilet odor removing device is provided a valve including a spring biased plunger and a water chamber disposed around the plunger; an odor rejection and overflow assembly mounted downstream of the valve and communicating therewith; and a blower mounted downstream of the odor rejection and overflow assembly and communicating therewith. In response to an activation of the blower and sucking odor into the plunger, the plunger slides to increase a volume of the water chamber with the odor being prevented from passing through the odor rejection and overflow assembly.
    Type: Application
    Filed: January 17, 2011
    Publication date: December 13, 2012
    Inventors: Hui Li, Qingyong Cai