Patents by Inventor Ng Tat Shing

Ng Tat Shing 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: 6125498
    Abstract: A handheld liquid extraction cleaner includes a recovery tank mounted to the forward end of a cleaner housing with a suction nozzle and conduit on a front face of the recovery tank connected to an inlet opening in the recovery tank. A vacuum source is connected to the recovery tank through an exhaust conduit, integrally formed in the recovery tank, for drawing liquid and debris through the suction nozzle and the suction conduit and into the recovery tank A removable cleaning fluid supply tank is mounted to a rear portion of the cleaner housing, an adjustable spray nozzle is mounted to the suction conduit and a pump is positioned in a supply conduit between the spray nozzle and the cleaning fluid supply tank for supplying pressurized cleaning fluid from the cleaning fluid supply tank to the spray nozzle The pump includes an impeller which is positioned in an outlet opening of a reservoir in which the cleaning fluid is deposited from the cleaning fluid supply tank.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: October 3, 2000
    Assignee: Bissell Homecare, Inc.
    Inventors: Kenneth L. Roberts, Diane M. Simek, Jeffrey A. Hall, Eric C. Huffman, Charles A. Reed, Jr., Steven K. Meek, Lau Wai Keung, Ng Tat Shing
  • Patent number: 5819365
    Abstract: A window washing accessory cleaning tool adapted for use with a water extraction cleaning machine has a solution spray nozzle integrated therewith and a combination suction and scrubbing head rotatably mounted with respect to the solution spray nozzle. The cleaning solution spray nozzle is provided on one side of a dual conduit support member and a head is rotatably mounted to the dual conduit support member. A foam applicator/scrub pad is provided along one end of the head and a suction nozzle opening defined by a squeegee blade and a rigid flange are provided one the other side of the head. With this structure, the applicator/scrub pad and suction nozzle can be rotated with respect to the cleaning solution spray nozzles, thereby making the accessory cleaning tool adaptable for a wide variety of cleaning operations. Preferably, the window washing accessory cleaning tool is removably mounted to the end of the flexible hose.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: October 13, 1998
    Assignee: Bissell Inc.
    Inventors: Eric C. Huffman, Kevin Ma Kam Hoi, Ng Tat Shing, Hok Yin Timmy Sin