Patents by Inventor Chan Chi Tong

Chan Chi Tong 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: 7797788
    Abstract: A floor care appliance is provided for cleaning bare surfaces such as tile, marble, linoleum and wood. The floor care appliance includes an accessory hose, telescoping wand and accessory tools for cleaning bare surfaces. A latch having a latch cover is provided for connecting the telescoping wand to the handgrip portion of the accessory hose. The latch and latch cover arrangement could also be utilized for connecting the accessory tools such as a accessory suction nozzle and grout tool to the telescoping wand.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: September 21, 2010
    Assignee: Techtronic Floor Care Technology Limited
    Inventor: Chan Chi Tong
  • Patent number: 7673370
    Abstract: The invention is a bare floor cleaning appliance provided with a foot pedal for raising and lowering the suction nozzle while simultaneously energizing and de-energizing the independent drive motor powering a horizontal axis rotary agitator. The foot pedal is depressed once to lower the suction nozzle to a position closest to the floor surface and the horizontal rotary agitator is energized to clean the floor surface. Suction from the motor-fan assembly is used to pick up dirt and used cleaning solution. The foot pedal is depressed one more time to raise the suction nozzle from the floor surface and de-energize the horizontal rotary agitator. In this mode, suction from the motor-fan assembly is used to pick up dry objects including dirt. The foot pedal operates the switch for energizing and de-energizing the independent electric motor by rotating a mode indicator operably connected to the foot pedal.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: March 9, 2010
    Assignee: Techtronic Floor Care Technology Limited
    Inventors: Lynn A. Frederick, Kevin E. Scheifele, Chan Chi Tong