US20080210179A1 - Steam Generator and Laundry Machine Comprising the Same - Google Patents

Steam Generator and Laundry Machine Comprising the Same Download PDF

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Publication number
US20080210179A1
US20080210179A1 US11/629,384 US62938406A US2008210179A1 US 20080210179 A1 US20080210179 A1 US 20080210179A1 US 62938406 A US62938406 A US 62938406A US 2008210179 A1 US2008210179 A1 US 2008210179A1
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US
United States
Prior art keywords
heater
overheating
steam generator
steam
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/629,384
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English (en)
Inventor
Seog Kyu Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of US20080210179A1 publication Critical patent/US20080210179A1/en
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PARK, SEOG KYU
Abandoned legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/40—Steam generating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/47—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to abnormal temperature, e.g. actuated by fusible plugs
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/28—Electric heating
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation

Definitions

  • the present invention relates to laundry machines, and more particularly, to a steam generator for a laundry machine and a laundry machine with the same.
  • a drum type washing machine washing laundry by using friction between a drum rotated by a motor and the laundry in a state detergent and washing water, and the laundry is introduced to the drum, has almost no damage, or entangling of the laundry, and can provide a washing effect of rubbing and pounding the laundry.
  • FIG. 1 illustrates a longitudinal section of a related art drum type washing machine.
  • the related art drum type washing machine is provided with a body 10 of an exterior thereof, a tub 20 in the body 10 , a drum 30 rotatably mounted in the tub 20 having lifters 35 on an inside circumferential surface, and driving means 70 for driving the drum 30 .
  • a door 40 On a front of the body 10 , There is a door 40 provided to a predetermined position so as to be matched with an opening in the drum 30 , with a gasket 50 between the door 40 and the drum 30 for maintaining sealing of the drum 30 .
  • the tub 20 has dampers at opposite lower sides of an outside circumference secured to the body 10 .
  • the driving means 70 is provided with a driving motor 71 for driving the drum 30 , and a belt 72 connected to a belt pulley 73 for transmission of a driving power from the driving motor 71 to the drum 30 .
  • a controller (not shown) of the drum type washing machine which controls operation of the washing machine progresses washing, rinsing, final spinning in succession, to washing the laundry.
  • the step of rinsing is performed, in which residual detergent and dirt produced as the washing is progressed by supplying new washing water and repetitive rotation of the drum 30 is separated from the laundry.
  • the drum 30 is rotated at a high speed (approx. 800 RPM ⁇ 1300 RPM) to remove moisture from the laundry.
  • a drum type washing machine having a steam generator 80 mounted thereto is provided.
  • a related art steam generator 80 is provided with a case 82 of an exterior thereof to form a space for holding water, and a heater 84 for heating the water.
  • the case 82 has one side with a water inlet (not shown) connected to a water supply pipe (not shown) for introduction of water to an inside of the case 82 , and the other side with an outlet (not shown) connected to a steam supply pipe (not shown) or the like for supplying steam generated by heating the water introduced thereto with the heater 84 to the drum 30 of the washing machine.
  • the heater 84 is mounted on a lower side of the case 82 for heating the water directly in a state the heater 84 is submerged in the water held in the case 82 completely.
  • a sheath heater is suitable for the heater, which has a high heat efficiency and can heat the water within a short time period.
  • overheating preventive means 86 such as thermo-fuse, at one end of the heater 84 for preventing the heater 84 from being overheated to damage the heater 84 itself and components around the heater 84 .
  • the overheating preventive means 86 is designed to be short circuited in a case the heater 84 is overheated, to cut off power to the heater 84 , to prevent the heater 84 from being overheated anymore.
  • the water is supplied to the case 82 through the water inlet.
  • the water introduced to the case 82 is heated with the heater 84 , and is turned into steam, and the steam is introduced to the drum 30 holding the laundry through the outlet (not shown) in the case 82 , to improve washing efficiency by wetting and soaking of the laundry.
  • the steam generator 80 is stopped, and a series of washing steps are performed, to finish the washing
  • the steam generator 80 can be tilted due to negligence of the worker or failure of installation of the washing machine in a horizontal position.
  • the overheating preventive means 86 at one side end of the heater 84 is in a submerged state, the overheating preventive means 86 fails to sense overheating of the exposed end of the heater 84 , and the temperature sensor 88 , at the center of the case 82 submerged in the water, also fails to sense the overheating of an inside of the case.
  • the case 82 is likely to deform by the heat from the heater 84 , or if it is excessive, the case 82 deformed by the heat is come into contact with the heater 84 to cause an outbreak of fire.
  • An object of the present invention is to provide a steam generator for a laundry machine, in which the heater is not overheated, to cause thermal deformation or outbreak of fire even if the steam generator is tilted; and a laundry machine having the same.
  • the object of the present invention can be achieved by providing a steam generator for a laundry machine including a case having a space for turning water into steam, a heater for heating the water for generating the steam, and at least two overheating preventive means for preventing overheating of the heater.
  • the overheating means is means for cutting off power to the heater, actually.
  • the overheating preventive means includes at least one of a thermo-fuse, thermister, and thermostat. That is, the overheating preventive means can prevent overheating of the heater by means of permanent or selective electric short circuit or substantial electric short circuit owing to a very high resistance.
  • the overheating preventive means includes first overheating preventive means at one side of the heater, and second overheating means at the other side of the heater. That is, if there are a plurality of overheating preventive means, it is preferable that the overheating preventive means are provided at opposite sides.
  • the first overheating preventive means and the second overheating preventive means are of types different from each other.
  • a steam generator for a laundry machine includes a case having a water inlet for introduction of water thereto, an outlet for discharging steam, and a receiver for holding water introduced thereto, a heater for heating the water in the case for generating the steam, and at least two overheating preventive means for preventing overheating of the heater.
  • the heater is mounted in the receiver of the case, and a sheath heater.
  • the heater is mounted such that the heater is passed through one side wall of the case and extended toward a direction of a side wall opposite the one side wall.
  • the overheating preventive means includes first overheating preventive means in the vicinity of one side wall of the case, and second overheating means in the vicinity of a side wall opposite to the one side wall.
  • the first overheating preventive means senses overheating of the heater by means of thermal conduction substantially, and more specifically, may be a thermo-fuse, or thermostat.
  • the second overheating preventive means senses overheating of the heater by means of radiation of convection of heat substantially, and more specifically, may be a thermister having a resistance varied with a temperature. Preferably, the resistance of the thermister rises sharply if a temperature of the heater is higher than a reference temperature, to cat off power to the heater, substantially.
  • the types of the first overheating means and the second overheating means may be interchanged.
  • a laundry machine in another aspect of the present invention, includes a body of an exterior of the laundry machine, a tub in the body, a drum rotatably mounted in the tub, and a steam generator for supplying steam to the tub or the drum, wherein the steam generator includes a case having a water inlet for introduction of water thereto, an outlet for discharging steam, and a receiver for holding water introduced thereto, a heater for heating the water in the case for generating the steam, and a plurality of overheating preventive means of types different from one another for preventing overheating of the heater.
  • the plurality of overheating preventive means may include first overheating preventive means on one side of the heater in the case, and second overheating means on the other side of the heater.
  • the steam generator for a washing machine of the present invention has the following advantages.
  • the second overheating preventive means senses overheating of the heater, and stops the heater even if the heater is overheated due to exposure of the other end of the heater coming from tilting of the steam generator, thermal deformation of the case and outbreak of fire can be prevented, to improve safety of the product.
  • the prevention of overheating of the end of the heater improves a lifetime and safety of the heater.
  • the provision of different types of overheating preventive means permits to prevent the overheating of the heater with high reliability, to prevent damage coming from overheating of the heater.
  • FIG. 1 illustrates a longitudinal section of a related art drum type washing machine
  • FIG. 2 illustrates a perspective view of a related art steam generator, with a partial cut away view
  • FIG. 3 illustrates a diagram of the steam generator in FIG. 2 when the steam generator is tilted
  • FIG. 4 illustrates a perspective view of a steam generator for a washing machine in accordance with a preferred embodiment of the present invention
  • FIG. 5 illustrates a bottom view of the steam generator in FIG. 4 seen from an inside thereof.
  • FIG. 6 illustrates a diagram of the steam generator in FIG. 4 when the steam generator is tilted.
  • FIG. 4 illustrates a perspective view of a steam generator for a washing machine in accordance with a preferred embodiment of the present invention
  • FIG. 5 illustrates a bottom view of the steam generator in FIG. 4 seen from an inside thereof
  • FIG. 6 illustrates a diagram of the steam generator in FIG. 4 when the steam generator is tilted.
  • the steam generator 180 includes a case having a space for turning water into steam, a heater for heating the water for generating the steam, and at least two overheating preventive means for preventing overheating of the heater.
  • the case 182 has a water inlet 181 at one side, and an outlet 183 at the other side for discharging steam generated as the water introduced through the water inlet 181 is heated toward a drum 30 (see FIG. 1 ).
  • the case 182 has a predetermined volume for holding a predetermined amount of water.
  • a heater 184 for heating the water in the case 182 There is a heater 184 for heating the water in the case 182 . It is preferable that the heater 184 mounted to a lower side of the case 182 for heating the water even if a water level in the case 182 is low.
  • the heater is a sheath heaters which has high thermal efficiency and can heat the water within a comparatively short time period.
  • the heater 184 is mounted such that the heater 184 is passed thrash one side wall of the case 182 , and extended to an opposite side wall of the one side wall, for easy detachment of the heater.
  • the heater 184 includes first overheating preventive means 186 for preventing overheating of the heater 184 .
  • the first overheating preventive means 186 is a thermo-fuse at one end of the heater 184 for short circuiting at overheating of the heater 184 to cut off power to the heater 184 , for preventing overheating of the heater 184 . That is, in a case the overheating of the heater is prevented by using such a thermo-fuse, it is required to replace the thermo-fuse with new one because the thermo-fuse is short circuited, permanently.
  • FIG. 4 illustrates a thermo-fuse 186 mounted between both ends of the heater for easy replacement of the thermo-fuse 186
  • FIG. 5 illustrates a thermo-fuse 186 at both ends of the heater.
  • thermo-fuse illustrated in FIG. 4 though heat of the heater is transmitted to the thermo-fuse, not directly, but indirectly thrash other media, but, in a case of the thermo-fuse illustrated in FIG. 5 , the heat of the heater is transmitted to the thermo-fuse directly.
  • the first overheating preventive means has the heat of the heater transmitted thereto by thermal conduction, substantially.
  • first overheating preventive means 186 there is second overheating preventive means 188 for measuring a temperature of the water in the case 182 or an inside of the case 182 .
  • the second overheating preventive means 188 is placed in the case 182 through a top surface thereof at a position opposite to the first overheating preventive means 186 at one end of the heater 184 , i.e., at the other end of the heater 184 .
  • the second overheating preventive means senses overheating by means of radiation, or convection, substantially.
  • the power to the heater 184 is cut off for preventing the heater 184 from emitting no more heat, if the heat sensed at the second overheating preventive means 188 is higher than a reference temperature.
  • the reference temperature is a temperature a material of the case 182 can resist, since the temperature is varied with the material, and a detailed structure of the inside of the case 182 , detailed description of which will be omitted.
  • the second overheating preventive means 188 serves to prevent overheating and deformation of the case 182 by measuring radiant heat emitted from the other end of the heater 184 , and cutting off the power to the heater 184 if the radiant heat is higher than the reference temperature.
  • the second overheating means 188 may be a thermister having a resistance varied with the heat measured.
  • the resistance of the thermister rises sharply at a temperature higher than the reference temperature where it is determined that the heater is overheated. That is, a very high resistance cuts off the power to the heater, actually.
  • the thermister does not short circuit physically, it can be assumed that a short circuit is made, substantially.
  • a thermostat may be used, of which volume expands, and contracts according to heat. That is, the thermostat is designed to cut off a current to the heater 184 as the thermostat expands thermally if the other end of the heater 184 is overheated.
  • a bimetal may be used.
  • the second overheating preventive means and the second overheating preventive means is overheating preventive means having types different from each other for preventing overheating of the heater with higher reliability, inclusive of heat sensing structures and major heat transfer types.
  • the second overheating preventive means may be a thermo-fuse for sensing the heat in a mode of heat transfer.
  • a water level sensor (not shown) for measuring a water level of the in the case 182 .
  • the water is introduced to the case 182 through the water inlet 181 , the heater 184 heats water introduced to the case 182 to generate steam, and the steam generated thus is supplied to the drum 30 (see FIG. 1 ) through the outlet 183 .
  • the first overheating means 186 cuts of the current to the heater 184 , to prevent any more overheating of the heater 184 .
  • the first overheating means 186 may not function, properly.
  • the steam generator 180 is tilted such that a portion of the first overheating preventive means 186 of the heater 184 is submerged in the water, and an opposite end of the portion the first overheating preventive means 186 is mounted is exposed from a water surface, since a neighborhood of the heater 184 having the first overheating preventive means 186 mounted thereon is submerged in the water, the heater 184 is kept operating.
  • the opposite end of the portion having the first overheating preventive means 186 mounted thereon of the heater 184 is exposed from the water surface, to fail to be cooled down by the water, but overheated, the opposite end emits radiant heat to an environment.
  • the second overheating preventive means 188 measures radiant heat emitted from the heater 184 exposed from the water surface, to stop operation of the heater 184 if the heater 184 is overheated over the reference temperature.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
US11/629,384 2005-03-17 2006-03-13 Steam Generator and Laundry Machine Comprising the Same Abandoned US20080210179A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020050022281A KR20060100604A (ko) 2005-03-17 2005-03-17 세탁기의 증기발생장치
KR10-2005-0022281 2005-03-17
PCT/KR2006/000895 WO2006098573A1 (en) 2005-03-17 2006-03-13 Steam generator and laundry machine comprising the same

Publications (1)

Publication Number Publication Date
US20080210179A1 true US20080210179A1 (en) 2008-09-04

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Application Number Title Priority Date Filing Date
US11/629,384 Abandoned US20080210179A1 (en) 2005-03-17 2006-03-13 Steam Generator and Laundry Machine Comprising the Same

Country Status (4)

Country Link
US (1) US20080210179A1 (de)
KR (1) KR20060100604A (de)
DE (1) DE112006000076B4 (de)
WO (1) WO2006098573A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190010656A1 (en) * 2015-08-04 2019-01-10 Lg Electronics Inc. Steam generator and control method of steam generator
DE102017124062A1 (de) 2017-10-16 2019-04-18 Bleckmann Gmbh & Co. Kg Dampfgenerator mit Sicherheitstemperaturbegrenzervorrichtung

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US7765628B2 (en) 2006-06-09 2010-08-03 Whirlpool Corporation Steam washing machine operation method having a dual speed spin pre-wash
US7941885B2 (en) 2006-06-09 2011-05-17 Whirlpool Corporation Steam washing machine operation method having dry spin pre-wash
US7730568B2 (en) 2006-06-09 2010-06-08 Whirlpool Corporation Removal of scale and sludge in a steam generator of a fabric treatment appliance
US7681418B2 (en) 2006-08-15 2010-03-23 Whirlpool Corporation Water supply control for a steam generator of a fabric treatment appliance using a temperature sensor
US7841219B2 (en) 2006-08-15 2010-11-30 Whirlpool Corporation Fabric treating appliance utilizing steam
US7886392B2 (en) 2006-08-15 2011-02-15 Whirlpool Corporation Method of sanitizing a fabric load with steam in a fabric treatment appliance
US7665332B2 (en) 2006-08-15 2010-02-23 Whirlpool Corporation Steam fabric treatment appliance with exhaust
US7707859B2 (en) 2006-08-15 2010-05-04 Whirlpool Corporation Water supply control for a steam generator of a fabric treatment appliance
US7753009B2 (en) 2006-10-19 2010-07-13 Whirlpool Corporation Washer with bio prevention cycle
US8393183B2 (en) 2007-05-07 2013-03-12 Whirlpool Corporation Fabric treatment appliance control panel and associated steam operations
US7905119B2 (en) 2007-08-31 2011-03-15 Whirlpool Corporation Fabric treatment appliance with steam generator having a variable thermal output
US7690062B2 (en) 2007-08-31 2010-04-06 Whirlpool Corporation Method for cleaning a steam generator
US7861343B2 (en) 2007-08-31 2011-01-04 Whirlpool Corporation Method for operating a steam generator in a fabric treatment appliance
US7966683B2 (en) 2007-08-31 2011-06-28 Whirlpool Corporation Method for operating a steam generator in a fabric treatment appliance
US7918109B2 (en) 2007-08-31 2011-04-05 Whirlpool Corporation Fabric Treatment appliance with steam generator having a variable thermal output
US8555675B2 (en) 2007-08-31 2013-10-15 Whirlpool Corporation Fabric treatment appliance with steam backflow device
US8555676B2 (en) 2007-08-31 2013-10-15 Whirlpool Corporation Fabric treatment appliance with steam backflow device
US8037565B2 (en) 2007-08-31 2011-10-18 Whirlpool Corporation Method for detecting abnormality in a fabric treatment appliance having a steam generator

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US5449884A (en) * 1992-07-09 1995-09-12 Samsung Electronics Co., Ltd. Overheating prevention apparatus of a boiling clothes washing machine and method thereof
US5584233A (en) * 1995-07-18 1996-12-17 Appliance Development Corp. Automatic bread-making apparatus
US20040187527A1 (en) * 2003-03-31 2004-09-30 Kim Jin Woong Steam jet drum washing machine
US20040244432A1 (en) * 2003-03-31 2004-12-09 Jin Woong Kim Steam supplying apparatus in washing machine

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KR100504501B1 (ko) * 2003-04-14 2005-08-02 엘지전자 주식회사 증기분사식 드럼세탁기의 세탁방법
EP1616990B1 (de) * 2004-07-13 2017-08-30 LG Electronics, Inc. Waschmaschine mit Dampferzeugungsgerät

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US5449884A (en) * 1992-07-09 1995-09-12 Samsung Electronics Co., Ltd. Overheating prevention apparatus of a boiling clothes washing machine and method thereof
US5584233A (en) * 1995-07-18 1996-12-17 Appliance Development Corp. Automatic bread-making apparatus
US20040187527A1 (en) * 2003-03-31 2004-09-30 Kim Jin Woong Steam jet drum washing machine
US20040244432A1 (en) * 2003-03-31 2004-12-09 Jin Woong Kim Steam supplying apparatus in washing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190010656A1 (en) * 2015-08-04 2019-01-10 Lg Electronics Inc. Steam generator and control method of steam generator
DE102017124062A1 (de) 2017-10-16 2019-04-18 Bleckmann Gmbh & Co. Kg Dampfgenerator mit Sicherheitstemperaturbegrenzervorrichtung

Also Published As

Publication number Publication date
KR20060100604A (ko) 2006-09-21
DE112006000076B4 (de) 2011-06-01
DE112006000076T5 (de) 2008-01-31
WO2006098573A1 (en) 2006-09-21

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Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PARK, SEOG KYU;REEL/FRAME:026479/0167

Effective date: 20070918

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION