Patents by Inventor William Kwok Kay Lee

William Kwok Kay Lee 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).

  • Publication number: 20120228968
    Abstract: A handheld electric mixer has a rotational output spindle for holding mixer work pieces, first and second gears located on the rotational output spindle, and a motor. The first gear is rotationally coupled to the motor output shaft. The mixer includes a two-speed gear-box receiving torque from the motor, and transmitting the torque to the output spindle. The two-speed gear-box includes a rotational lay shaft axially parallel to the rotational output spindle, third and fourth gears located on the lay shaft, the third gear meshing with the first gear and the fourth gear meshing with the second gear. A selector mechanism selects between a first gear ratio and a second gear ratio and includes a clutch disk on the spindle, and moveable axially for alternatively engaging and rotatably locking the one of the third or fourth gears that is engaged with the clutch disk.
    Type: Application
    Filed: April 23, 2012
    Publication date: September 13, 2012
    Applicant: MAIN POWER ELECTRICAL FACTORY LTD.
    Inventors: William Kwok Kay LEE, Mei Chee Choi, Bo GAO
  • Patent number: 8162530
    Abstract: A handheld electric mixer has a variable speed motor and a two-speed gearbox for transmitting driving torque of the motor to a pair of work pieces that mix, blend, beat or otherwise act upon a food item or recipe constituents. The gear box has a first gear ratio for providing a first range of output speeds and a second gear ratio for providing a second range of output speeds. The first ratio transmits at least twice as much torque to the rotational work pieces as does the second ratio. There is an electronic speed controller for controlling rotational speed the motor and a separate ratio selector for selecting between the first and second ratios of the gearbox.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: April 24, 2012
    Assignee: Main Power Electrical Factory Ltd.
    Inventor: William Kwok Kay Lee
  • Publication number: 20090091199
    Abstract: A handheld electric mixer has a variable speed motor and a two-speed gearbox for transmitting driving torque of the motor to a pair of work pieces that mix, blend, beat or otherwise act upon a food item or recipe constituents. The gear box has a first gear ratio for providing a first range of output speeds and a second gear ratio for providing a second range of output speeds. The first ratio transmits at least twice as much torque to the rotational work pieces as does the second ratio. There is an electronic speed controller for controlling rotational speed the motor and a separate ratio selector for selecting between the first and second ratios of the gearbox.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 9, 2009
    Applicant: MAIN POWER ELECTRICAL FACTORY LTD.
    Inventor: William Kwok Kay Lee
  • Publication number: 20040118298
    Abstract: A coffee making machine includes a water reservoir, a heating element, a controller programmed to analyse data and generate a signal for the heating element. A relay circuit controls current to the heating element. A temperature sensor monitors heat at the heating element and a water level switch detects water level in the reservoir. If the temperature sensor detects excessive temperature at the heating element, the controller transmits a disable signal to the relay circuit to thereby stop any current to the heating element. If the water level switch detects a low water level in the reservoir, the controller transmits a signal to the control panel to thereby disable the starting of brewing cycle. A display panel displays an operational mode of the machine and the user can't start the machine in any “Run Mode” when either a high temperature or low water condition is determined.
    Type: Application
    Filed: December 18, 2002
    Publication date: June 24, 2004
    Applicant: Main Power Electrical Factory Ltd.
    Inventor: William Kwok Kay Lee
  • Patent number: 6523990
    Abstract: A hand blender includes a work shaft and an elongate housing enclosing the work shaft. An upper housing portion encloses a motor for driving the work shaft. A work element is disposed at the output end of the work shaft. At the second end of the elongate housing is a bell-shaped housing portion defining a blending chamber that encloses the work element. A substantially spherical-shaped bush is disposed on the work shaft. A sleeve located within the elongate housing portion has a substantially convex shaped recess adapted to receive the bush to support the work shaft within the housing.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: February 25, 2003
    Assignee: Main Power Electrical Factory Ltd.
    Inventor: William Kwok Kay Lee