Patents by Inventor William K. Y. Cheung

William K. Y. Cheung 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).

  • Tilt sensor for cleaning device
    Patent number: 8161596
    Abstract: A tilt sensor for a cleaning device makes use of an optical sensor to interrupt operation of the device. In one implementation, the tilt sensor shuts off a UV light included in the cleaning device's operations. The tilt sensor includes a housing with at least one chamber defined therein. A sliding or moving element is located in the chamber. The optical sensor is operatively associated with the chamber so that, in response to certain movement of the element within the chamber, the optical sensor signals the tilt sensor to turn off the UV light.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: April 24, 2012
    Assignee: Oreck Holdings LLC
    Inventors: William K. Y. Cheung, Ernest Matthew Chavana, Jr.
  • TILT SENSOR FOR CLEANING DEVICE
    Publication number: 20100186187
    Abstract: A tilt sensor for a cleaning device makes use of an optical sensor to interrupt operation of the device. In one implementation, the tilt sensor shuts off a UV light included in the cleaning device's operations. The tilt sensor includes a housing with at least one chamber defined therein. A sliding or moving element is located in the chamber. The optical sensor is operatively associated with the chamber so that, in response to certain movement of the element within the chamber, the optical sensor signals the tilt sensor to turn off the UV light.
    Type: Application
    Filed: January 23, 2009
    Publication date: July 29, 2010
    Inventors: William K.Y. Cheung, Ernest Matthew Chavana, JR.