Patents by Inventor Hewnam Ahn

Hewnam Ahn 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: 20090148312
    Abstract: The present invention relates to a variable capacity swash plate type compressor, which has a stopper protruding from the inner surface of a hub and being in contact with a sleeve when a swash plate is at the maximum inclination angle to shorten a stroke distance of the stopper for supporting the maximum inclination angle of the swash plate, thereby reducing a hitting noise when the stopper is moved at the maximum inclination angle and when an air conditioner is turned off.
    Type: Application
    Filed: August 16, 2006
    Publication date: June 11, 2009
    Inventor: Hewnam Ahn
  • Publication number: 20090110569
    Abstract: The present invention relates to a variable capacity swash plate type compressor, which has an elastic member mounted on a driving shaft located between a rotor and a swash plate for pushing a swash plate in a direction that an inclination angle is decreased to always contact and support a side of the swash plate to the rotor when the inclination angle of the swash plate is varied, thereby preventing a vibration of the swash plate and reducing noise during operation.
    Type: Application
    Filed: August 11, 2006
    Publication date: April 30, 2009
    Inventor: Hewnam Ahn
  • Publication number: 20070253837
    Abstract: The present invention relates to a variable capacity swash plate type compressor, in which a check valve for circulating refrigerant inside a compressor and preventing a backflow of the refrigerant when an air conditioner is turned off is mounted on a side of a discharge muffler chamber in a cover type so that the discharge muffler chamber is formed by the check valve, thereby reducing the number of components, the number of work processes, and a pulsating pressure (pulsating noise) of discharged refrigerant, allowing that the check valve is mounted at the center of a discharge chamber without any increase in size of the compressor, preventing an overlapping phenomenon of a pulsating pressure waveform of a high-pressure refrigerant at the time of discharge since the check valve is located at the center of the discharge chamber, and preventing a separation of the check valve by fixing the check valve in the discharge chamber via a retainer.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 1, 2007
    Inventors: Taeyoung Park, Hewnam Ahn, Youngseop Yoon
  • Patent number: 7150603
    Abstract: The present invention relates to a compressor for sucking, compressing and discharging a refrigerant gas from the external refrigerant circuit. The compressor includes: a suction muffler chamber having a suction port formed on the outer circumference of a cylinder block, which has a plurality of bores arranged in a line, and an oil storing part for storing oil, the suction port being communicated with the external refrigerant circuit; and a rear housing connected to the cylinder block to close the rear end of the cylinder block and having a suction chamber and a discharge chamber therein, the rear housing having a suction chamber communicating passage for communicating the suction chamber with the suction muffler chamber at the upstream part of the suction chamber.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: December 19, 2006
    Assignee: Halla Climate Control Corporation
    Inventors: Jaehoon Lee, Jeonghun Seo, Haksoo Kim, Hewnam Ahn
  • Publication number: 20060045763
    Abstract: The present invention relates to a compressor for sucking, compressing and discharging a refrigerant gas from the external refrigerant circuit. The compressor includes: a suction muffler chamber having a suction port formed on the outer circumference of a cylinder block, which has a plurality of bores arranged in a line, and an oil storing part for storing oil, the suction port being communicated with the external refrigerant circuit; and a rear housing connected to the cylinder block to close the rear end of the cylinder block and having a suction chamber and a discharge chamber therein, the rear housing having a suction chamber communicating passage for communicating the suction chamber with the suction muffler chamber at the upstream part of the suction chamber.
    Type: Application
    Filed: August 26, 2005
    Publication date: March 2, 2006
    Inventors: Jaehoon Lee, Jeonghun Seo, Haksoo Kim, Hewnam Ahn
  • Patent number: 6782798
    Abstract: Disclosed is a coupling structure between a drive shaft and a swash plate assembly in a variable capacity swash plate type compressor, which is so modified that the rotating force of the drive shaft can be transferred to a rotor and the swash plate assembly by substantially equal amounts so as to prevent the frictional of a driving unit as well as prolong life time.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: August 31, 2004
    Assignee: Halla Climate Control Corporation
    Inventor: Hewnam Ahn
  • Publication number: 20030108433
    Abstract: Disclosed is a coupling structure between a drive shaft and a swash plate assembly in a variable capacity swash plate type compressor, which is so modified that the rotating force of the drive shaft can be transferred to a rotor and the swash plate assembly by substantially equal amounts so as to prevent the frictional of a driving unit as well as prolong life time.
    Type: Application
    Filed: December 11, 2002
    Publication date: June 12, 2003
    Inventor: Hewnam Ahn
  • Patent number: 6568312
    Abstract: Disclosed is a thrust bearing structure for supporting a driving shaft for use in a variable displacement swash plate type compressor. The inventive thrust bearing structure supports a driving shaft of the compressor, and has a specific correlation between the inner and the outer diameters of a stationary race and a driving race, between the races and a cylinder bore and an outer diameter of the driving shaft. That is, a distance between an inner diameter of the stationary race and an outer diameter of the driving shaft is greater than a distance between an outer diameter of the stationary race and a surface of the center bore.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: May 27, 2003
    Assignee: Halla Climate Control Corporation
    Inventors: Hewnam Ahn, Taeyoung Park
  • Publication number: 20030000378
    Abstract: Disclosed is a thrust bearing structure for supporting a driving shaft for use in a variable displacement swash plate type compressor. The inventive thrust bearing structure supports a driving shaft of the compressor, and has a specific correlation between the inner and the outer diameters of a stationary race and a driving race, between the races and a cylinder bore and a outer diameter of the driving shaft. That is, a distance (Lr1) between an inner diameter (d3) of the stationary race 82 and an outer diameter (d2) of the driving shaft 20 is greater than a distance (Lr2) between an outer diameter (D3) of the stationary race 82 and a surface 4a of the center bore 4 (Lr1>Lr2).
    Type: Application
    Filed: September 28, 2001
    Publication date: January 2, 2003
    Applicant: HALLA CLIMATE CONTROL CORPORATION
    Inventors: Hewnam Ahn, Taeyoung Park
  • Patent number: 6260469
    Abstract: A piston, adapted for use in a swash plate type of air conditioning compressor including a generally cylindrical cylinder block provided with at least one cylinder bore, in which the piston is reciprocally disposed. The piston includes a cylindrical body with a head portion, a bridge portion extending from the body and having a recess, and a pair of shoe pockets formed in opposed walls defined in the recess. Each of the shoe pockets includes an entrance and an apex, and a lower edge portion of the body is positioned at an adjoining portion between the body and the bridge portion extending to a place between the entrance and the apex of the shoe pocket adjacent to the body.
    Type: Grant
    Filed: May 2, 1999
    Date of Patent: July 17, 2001
    Assignee: Visteon Global Technologies, Inc.
    Inventor: Hewnam Ahn
  • Patent number: 6227811
    Abstract: A variable capacity swash plate type compressor 10 incorporates a swash plate 34 to effect movement of at least an associated piston 44 to vary the capacity of the compressor 10. The structure of the swash plate 34 and piston 44 minimize the bending moment exerted on the piston 44 during operation.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: May 8, 2001
    Assignees: Visteon Global Technologies, Inc., Halla Climate Control Corp.
    Inventor: Hewnam Ahn
  • Patent number: 6139283
    Abstract: A hinge mechanism is provided for a variable capacity swash plate type compressor. The swash plate type compressor includes a housing having a plurality of cylinder bores, a crank chamber, a suction chamber, and a discharge chamber. A rotor is mounted on and rotatably fixed to a drive shaft and includes a first portion of a hinge mechanism. A swash plate, including a second portion of the hinge mechanism, is operatively connected to the rotor via the hinge mechanism and slidably mounted on said drive shaft to thereby change an inclination angle thereof in response to changes of pressure in the crank chamber. The first portion of the hinge mechanism includes a pair of support arms protruding from the rotor toward the swash plate, each of the support arms having a guide groove, and the second portion includes an arm having one end extending from the swash plate, and a pin means supported by the other end of the arm.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: October 31, 2000
    Assignee: Visteon Global Technologies, Inc.
    Inventor: Hewnam Ahn