Patents by Inventor Myung Keun Yoo

Myung Keun Yoo 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: 20090162203
    Abstract: A fan module is provided. The fan module is configured to dissipate heat from, e.g., a compressor and a condenser disposed in a machine room of the refrigerator. The fan module includes a fan, a shroud having a receiving hole positioned around the fan, a fan mounting portion coupled to a rear surface of the shroud on which the fan is mounted, the rear surface facing a downstream airflow direction of the fan, and a concave recess provided on a rear surface of the shroud and circling the receiving hole. The fan module prevents noise caused by air passing through the receiving hole and prevents flow loss.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 25, 2009
    Applicant: LG ELECTRONICS, INC.
    Inventors: Myung-Keun YOO, Hyoun-Jeong SHIN
  • Publication number: 20080295275
    Abstract: A vacuum cleaner set includes a vacuum cleaner and a cleaner mount. The vacuum cleaner includes a main body that is detachably mounted on a mount having a cord reel, a motor and a battery that are provided in the main body, an AC power source that is provided in the main body and connected to a power outlet by the cord reel, a charging device receiving power from the AC power source and charging the battery, and a control unit selecting one of power output from the battery and power output from the AC power source.
    Type: Application
    Filed: October 2, 2007
    Publication date: December 4, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Myung Keun YOO, Sang Young KIM, Kwang Woon AHN, Hyoun Jeong SHIN
  • Publication number: 20080297102
    Abstract: A cleaner that can automatically respond to a change in an AC voltage and a voltage of a battery. In the motor, a motor for rotating a collecting fan is driven by a motor driver. The motor driver drives the motor using a voltage from a voltage selector. The voltage selector switches between a low-level voltage of the battery and a high-level voltage derived from the AC voltage to be supplied to the motor driver.
    Type: Application
    Filed: October 3, 2007
    Publication date: December 4, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Sang Young KIM, Myung Keun YOO, Kwang Woon AHN, Hyoun Jeong SHIN
  • Publication number: 20080297101
    Abstract: A cleaner that can have the sufficient capability of collecting pollutant particles by a battery voltage as well as a AC voltage. The cleaner uses a switched reluctance motor to rotate a collecting fan. The switched reluctance motor is driven by a motor driver in one of a PWM mode or a pulse trigger mode. The motor driver drives the switched reluctance motor using one of the battery voltage and a DC voltage converted from the AC voltage, depending on whether the AC voltage is received. The PWM mode and the trigger mode are switched depending on whether the AC voltage is received. Accordingly, the cleaner makes it possible to reduce the time taken to clean up pollutant particles using the battery voltage to the time taken to clean up the pollutant particles using the AC voltage.
    Type: Application
    Filed: October 3, 2007
    Publication date: December 4, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Myung Keun YOO, Sang Young KIM, Kwang Woon AHN, Hyoun Jeong SHIN
  • Patent number: 7458131
    Abstract: Disclosed herein is a method for determining a frequency of a power brush in a vacuum cleaner. According to the method of the present invention, a mechanical oscillation frequency of a driving unit, which includes a brush body reciprocated within a range of prescribed angles, and a torsion bar for providing a prescribed elastic force to angular rotation of the brush body, is set equally to a driving frequency of a power supply unit, which drives the driving unit, or is set a prescribed percentage higher or lower than the driving frequency of the power supply unit, so that the driving unit can resonate. A large amount of movement is obtained using a small amount of power by means of the resonance.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: December 2, 2008
    Assignee: LG Electronics Inc.
    Inventors: Myung Keun Yoo, Jun Young Lim, Yo Han Lee, Sang Young Kim
  • Publication number: 20080286113
    Abstract: Disclosed is a high speed type impeller, including: a body having a shaft coupling hole into which a rotation shaft of a motor is coupled, the outer circumference of the body being widened from the top to bottom end in the insertion direction of the rotation shaft to form a bent surface, a step portion shadowed in the radial direction being formed on the top end of the body; a plurality of blades installed on the bent surface of the body to be bent at a predetermined angle to the rotation shaft direction; and an upper reinforcing ring installed at the step portion of the body. Even through the impeller is made of a low cost material, the reinforcing ring reinforces the weak portion of the impeller to improve durability. Reliability of the impeller is attained with high economical efficiency.
    Type: Application
    Filed: October 24, 2006
    Publication date: November 20, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Myung-Keun Yoo, Jun-Young Lim
  • Patent number: 7363682
    Abstract: The present invention discloses a suction head for a vacuum cleaner, including a casing having a suction port for sucking alien substances from the floor, an agitator rotatably installed inside the suction port, a plurality of brushes being arranged on the agitator in the length direction, an agitator driving unit for driving the agitator to perform reciprocating rotation in a predetermined angle range, and a resonance unit for resonating the reciprocating rotation of the agitator driving unit. The suction head for the vacuum cleaner improves cleaning performance of the vacuum cleaner.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: April 29, 2008
    Assignee: LG Electronics Inc.
    Inventors: Jun-Young Lim, Myung-Keun Yoo, Yong-Won Choi
  • Patent number: 7279815
    Abstract: A swing motor having an opening formed asymmetrically inside a stator. The swing motor is formed with an asymmetrical opening, in particular in a semicircular shape inside the stator. The opening is provided with a plurality of salient poles wound with coils. Electric current alternately flows through the coils so that a rotor, installed in the stator in a state of being spaced apart from the stator, can reciprocally move. Since the height of the stator is reduced by forming the opening asymmetrically in comparison with the case of forming the opening symmetrically, it is advantageous for minimizing the size of the product in which the swing motor is installed.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: October 9, 2007
    Assignee: LG Electronics Inc.
    Inventors: Jun Young Lim, Yo Han Lee, Sang Young Kim, Myung Keun Yoo, Yong Won Choi
  • Publication number: 20050273970
    Abstract: A suction head of a vacuum cleaner, comprises: a housing having a suction port through which dust on a floor is sucked by an operation of a fan motor; a brush rotatably installed in the suction port and having a plurality of bristles arranged in a longitudinal direction thereof; a brush driving device for reciprocatingly rotating the brush within a range of a predetermined angle; a first suction duct having an inlet positioned corresponding to a direction of dust movement when the brush rotates in a forward direction; and a second suction duct having an inlet positioned corresponding to a direction of dust movement when the brush rotates in a backward direction. Brushed dust can be properly sucked according to a reciprocating rotation direction of the brush, and thereby a cleaning function of the cleaner can be increased.
    Type: Application
    Filed: February 10, 2005
    Publication date: December 15, 2005
    Applicant: LG Electronics Inc.
    Inventors: Seong-Ho Cho, Myung-Keun Yoo, Young-Sok Nam
  • Publication number: 20050273971
    Abstract: A suction head of a vacuum cleaner, comprises: a housing having a suction port through which dust on a floor is sucked by an operation of a fan motor; a primary brush rotatably installed in the suction port and having a plurality of bristles arranged in a longitudinal direction thereof; a primary brush driving device for reciprocatingly rotating the primary brush within a range of a predetermined angle; and an auxiliary brush rotatably installed at one side of the primary brush and having a plurality of bristles arranged in a longitudinal direction thereof, for supplementing an operation of the primary brush with being rotated. According to this, an entire area occupied by the suction head can be evenly brushed, and brushed dust can be smoothly sucked.
    Type: Application
    Filed: February 18, 2005
    Publication date: December 15, 2005
    Inventors: Seong-Ho Cho, Myung-Keun Yoo, Young-Sok Nam
  • Publication number: 20050015922
    Abstract: The present invention discloses a suction head for a vacuum cleaner, including a casing having a suction port for sucking alien substances from the floor, an agitator rotatably installed inside the suction port, a plurality of brushes being arranged on the agitator in the length direction, an agitator driving unit for driving the agitator to perform reciprocating rotation in a predetermined angle range, and a resonance unit for resonating the reciprocating rotation of the agitator driving unit. The suction head for the vacuum cleaner improves cleaning performance of the vacuum cleaner.
    Type: Application
    Filed: December 31, 2003
    Publication date: January 27, 2005
    Inventors: Jun-Young Lim, Myung-Keun Yoo, Yong-Won Choi
  • Publication number: 20050005393
    Abstract: The present invention discloses a suction head for a vacuum cleaner, including a casing having a suction port for sucking alien substances from the floor, an agitator rotatably installed inside the suction port, a plurality of brushes being arranged on the agitator in the length direction, and an agitator driving unit for driving the agitator to perform reciprocating rotation in a predetermined angle range. The suction head for the vacuum cleaner improves cleaning performance of the vacuum cleaner.
    Type: Application
    Filed: December 31, 2003
    Publication date: January 13, 2005
    Inventor: Myung-Keun Yoo