US20040154353A1 - Drum type washing machine having vibration attenuating means - Google Patents

Drum type washing machine having vibration attenuating means Download PDF

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Publication number
US20040154353A1
US20040154353A1 US10/722,457 US72245703A US2004154353A1 US 20040154353 A1 US20040154353 A1 US 20040154353A1 US 72245703 A US72245703 A US 72245703A US 2004154353 A1 US2004154353 A1 US 2004154353A1
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US
United States
Prior art keywords
tub
end connected
washing machine
type washing
drum type
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
US10/722,457
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English (en)
Inventor
Gon Kim
Yu Kang
Sang Je
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
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANG, YU BEOM, JE, SANG MAN, KIM, GON
Publication of US20040154353A1 publication Critical patent/US20040154353A1/en
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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
    • 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 
    • D06F39/12—Casings; Tubs
    • D06F39/125—Supporting arrangements for the casing, e.g. rollers or legs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention relates to a washing machine, and more particularly, to a drum type washing machine having a vibration attenuating means, by which vibrations generated from driving the drum type washing machine are attenuated.
  • a washing machine holds water and detergent in a lower part of a tub. After laundry is put in a drum installed inside the tub, the drum is rotated to perform washing, rinsing, and dewatering.
  • Such a washing machine is an apparatus for eliminating dirt or filth attached to the laundry by applying a mechanical force thereto together with a detergent.
  • a drum type washing machine is an apparatus for eliminating dirt or filth attached to the laundry by putting the laundry, water, and detergent in a drum horizontally installed to rotate by a driving force of a motor.
  • the drum type washing machine barely has entanglement and damage of the laundry, consumes less water, and even has washing effects of beating and rubbing.
  • FIG. 1 is a schematic perspective view of a drum type washing machine according to a related art, in which an internal view is shown in part.
  • FIG. 2 is a cross-sectional view of a drum type washing machine according to a related art.
  • a drum type washing machine consists of a cabinet 10 forming an exterior, a tub 20 provided in the cabinet to hold laundry, water, and detergent therein, a motor 30 in rear of the tub 20 to have a horizontally installed rotational shaft, a drum 40 provided in the tub 20 to hold the laundry, a damper 50 installed at right and left lower sides of the tub 20 to attenuate vertical and horizontal vibrations of the tub 20 , and an elastic means 60 installed at right and left upper sides of the tub 20 to attenuate the vertical and horizontal vibrations of the tub 20 .
  • the cabinet 10 consists of a top plate 11 provided on a topside, a base plate 12 provided on a bottom side, and a cabinet cover 13 provided on a front side to have an entrance (not shown in the drawing) at a central portion to put in/out the laundry.
  • a door 13 is installed at the cabinet cover 13 to prevent the laundry from popping out through the entrance.
  • a gasket 21 is installed between the door 13 a and the tub 20 to alleviate a shock caused by a rotation of the drum 40 and to play a role as a packing in preventing water leakage.
  • a control panel 11 a for controlling an operation of the drum type washing machine is installed on the top plate 11 . And, a plurality of lifters 41 are installed on an inside of the drum 40 to pull up the laundry to a predetermined height to fall by gravity.
  • a water supply hose 16 a water supply valve (not shown in the drawing), and a detergent box 17 are installed in an upper part of the cabinet 10 to supply the water and detergent to the tub 20 .
  • a drain pump 18 and a drain hose 19 are installed at one side under the tub 20 to circulate or discharge the water.
  • the damper 50 consists of a left damper 51 having one end connected to the left lower side of the tub 20 and the other end connected to a top of the base plate 12 and a right damper 52 having one end connected to the right lower side of the tub 20 and the other end connected to the top of the base plate 12 .
  • the elastic means 60 consists of a left spring 61 having one end connected to a left upper lateral side of the cabinet 10 and the other end connected to a left upper side of the tub 20 and a right spring 62 having one end connected to a right upper lateral side of the cabinet 10 and the other end connected to a right upper side of the tub 20 .
  • the above-constructed drum type washing machine attenuates the vertical and horizontal vibrations using the damper 50 and elastic means 60 but fails to attenuate a front-to-rear vibration, whereby the tub severely shakes in front-to-rear directions.
  • the front-to-rear vibration recently raises a big problem in a large-capacity high-speed drum type washing machine.
  • the front-to-rear vibration of the tub 20 makes shocks appearing on parts such as the damper 50 and the gasket 21 to degrade their endurances. Moreover, the front-to-rear vibration as affects operations of the drum 40 inside the tub 20 and the motor 30 in rear of the tub 20 so that the drum type washing machine is unstably driven during washing, rinsing, and dewatering.
  • the present invention is directed to a drum type washing machine having a vibration attenuating means that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
  • An object of the present invention which has been devised to solve the foregoing problem, lies in providing a drum type washing machine having a vibration attenuating means, which enables to attenuate vertical, horizontal, and front-to-rear vibrations.
  • a drum type washing machine including a cabinet forming an exterior, a tub provided in the cabinet to have a front opening and to hold water, and detergent therein, a motor in rear of the tub 200 to have a horizontally installed rotational shaft, a drum in the tub to be rotated by the motor, and a vibration attenuating means that includes a damper unit under the tub to attenuate vertical and horizontal vibrations of the tub and an elastic member over the tub to attenuate a front-to-rear vibration of the tub.
  • the damper unit is installed at right and left sides under the tub, and more preferably, at a middle portion between front and rear sides under the tub.
  • the elastic member is installed at front and rear sides over the tub, and more preferably, at a middle portion between right and left sides over the tub.
  • the cabinet includes a base plate installed as a bottom of the cabinet, a pair of side plates on both sides of the base plate, a rear plate in rear of the base plate and the side plates, a front plate in front of the base plate and the side plates, and a top plate on the side, rear, and front plates.
  • the elastic member includes a front spring having one end connected to an upper front side of the tub to extend in an upper front direction and the other end connected to a lower front side of the top plate and a rear spring having one end connected to an upper rear of the tub to extend in an upper rear direction and the other end connected to a lower rear side of the top plate.
  • the elastic member may include a front spring having one end connected to an upper front side of the tub to extend in an upper front direction and the other end connected to a lower front side of the top plate and a rear spring having one end connected to an upper rear of the tub to extend in an upper rear direction and the other end connected to an upper side of the rear plate.
  • the elastic member may include a front spring having one end connected to an upper front side of the tub to extend in an upper front direction and the other end connected to an upper side of the front plate and a rear spring having one end connected to an upper rear of the tub to extend in an upper rear direction and the other end connected to a lower rear side of the top plate.
  • the elastic member may include a front spring having one end connected to an upper front side of the tub to extend in an upper front direction and the other end connected to an upper side of the front plate and a rear spring having one end connected to an upper rear of the tub to extend in an upper rear direction and the other end connected to an upper side of the rear plate.
  • the tub includes a connecting member at the upper front and rear sides to have the elastic member connected thereto.
  • the above-constructed drum type washing machine attenuates the vertical, horizontal, and front-to-rear vibrations and reduces noise generated from driving the washing machine.
  • FIG. 1 is a schematic perspective view of a drum type washing machine according to a related art, in which an internal view is shown in part;
  • FIG. 2 is a cross-sectional view of a drum type washing machine according to a related art
  • FIG. 3 is a schematic perspective view of a drum type washing machine according to the present invention, in which an internal view is shown in part;
  • FIG. 4 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention
  • FIG. 5 is a cross-sectional view of a drum type washing machine according to a second embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a drum type washing machine according to a third embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention.
  • FIG. 3 is a schematic perspective view of a drum type washing machine according to the present invention, in which an internal view is shown in part.
  • a drum type washing machine includes a cabinet 100 , a tub 200 provided in the cabinet to hold laundry, water, and detergent therein, a motor 300 in rear of the tub 200 to have a horizontally installed rotational shaft, a drum 400 provided in the tub 200 , and a damper 500 attenuating vibrations of the tub 200 .
  • FIG. 4 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention
  • FIG. 5 is a cross-sectional view of a drum type washing machine according to a second embodiment of the present invention
  • FIG. 6 is a cross-sectional view of a drum type washing machine according to a third embodiment of the present invention
  • FIG. 7 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention.
  • a drum type washing machine includes a cabinet 100 forming an exterior, a tub 200 provided in the cabinet to hold laundry, water, and detergent therein, a motor 300 in rear of the tub 200 to have a rotational shaft horizontally penetrating into the tub 200 , a drum 400 provided in the tub 200 to be connected to the rotational shaft of the motor 300 to hold the laundry, and a vibration attenuating means for attenuating vibrations generated from the tub 200 when the drum 400 is driven to rotate by a driving force of the motor 300 .
  • the cabinet 100 includes a base plate 120 installed as a bottom, a pair of side plates 120 provided on both sides of the base plate 120 , a rear plate 150 provided in rear of the base plate 120 and the side plates 140 , a front plate 130 provided in front of the base plate 120 and the side plates 140 , and a top plate 110 provided on the side, rear, and front plates.
  • the front plate 130 includes an entrance at a center through which the laundry is put in/out and a door 131 opening/closing the entrance to prevent the laundry from being thrown away through the entrance.
  • a gasket 210 is installed between the door 131 and the tub 200 to alleviate a shock generated from the tub 200 and to play a role of a packing for preventing water from leaking outside.
  • a control panel 111 controlling an operation of the drum type washing machine is installed on a the top plate 110 .
  • a plurality of lifters 410 are installed on an inside of the drum 400 to pull up the laundry to a predetermined height to fall by gravity.
  • a water supply hose 160 a water supply valve (not shown in the drawing), and a detergent box 170 are installed in an upper part of the cabinet 100 to supply the water and detergent to the tub 200 .
  • a drain pump 180 and a drain hose 190 are installed at one side under the tub 200 to circulate or discharge the water.
  • the vibration attenuating means includes a damper unit 500 installed left and right sides beneath the tub 200 to attenuate vertical and horizontal vibrations of the tub 200 and an elastic member 600 installed onto front and rear sides of the tub 200 to attenuate a front-to-rear vibration of the tub 200 .
  • the damper unit includes a left damper 510 having one end connected to a left bottom side of the tub 200 to extend in a left lower direction and the other end connected to an upper left side of the base plate 120 and a right damper 520 having one end connected to a right bottom side of the tub 200 to extend in a lower right direction and the other end connected to a right upper side of the base plate 120 .
  • both ends of each of the dampers 510 and 520 are hinge-coupled with the tub 200 and the base plate 120 , respectively to support the tub 200 .
  • the elastic member 600 includes a front spring 611 having one end connected to an upper front side of the tub 200 to extend in an upper front direction and the other end connected to a lower front side of the top plate 110 and a rear spring 612 having one end connected to an upper rear of the tub 200 to extend in an upper rear direction and the other end connected to a lower rear side of the top plate 110 .
  • Spring connecting members 220 and 230 are provided at the upper front and rear sides of the tub 200 , to which the one ends of the front and rear springs 611 and 612 are connected, to be connected to the one ends of the front and rear springs 611 and 612 , respectively.
  • Openings are formed at the spring connecting members 220 and 230 to have the one ends of the springs 611 and 612 fitted thereto for coupling.
  • spring fixing members 240 and 250 are provided at the lower front and rear sides, to which the other ends of the front and rear springs 611 and 612 are connected, to have the other ends of the front and rear springs 611 and 612 fixed thereto.
  • a washing step is executed so that the drum 400 is rotated by the driven motor 300 .
  • a draining step is initiated to discharge the used water in the tub 200 outside the cabinet using the drain pump and hose 180 and 190 .
  • a dewatering step is executed by having the drum 400 rotate at high sped to remove water contents involved in the laundry.
  • the drum 400 is rotated by the motor to generate vibrations to vibrate the tub 200 outside the drum 400 .
  • the horizontal and vertical vibrations of the tub 200 are alleviated by the damper unit 500 and the front-to-rear vibration of the tub 200 is alleviated by the elastic member 600 , whereby the overall vibrations of the washing machine are attenuated.
  • the elastic member enables to attenuate the vertical vibration together with the damper unit as well as the front-to-rear vibration of the tub.
  • the installation structure of the elastic means 600 can be variously modified according to the positions to which the front and rear springs 611 and 621 are fixed.
  • the elastic member 600 includes a front spring 612 having one end connected to an upper front side of the tub 200 to extend in an upper front direction and the other end connected to a lower front side of the top plate 110 and a rear spring 622 having one end connected to an upper rear of the tub 200 to extend in an upper rear direction and the other end connected to an upper side of the rear plate 150 .
  • spring fixing members 241 and 251 to which the other ends of the front and rear springs 612 and 622 are connected, are provided at the lower front side of the top plate 110 and the upper side of the rear plate 150 , respectively.
  • the elastic member 600 includes a front spring 613 having one end connected to an upper front side of the tub 200 to extend in an upper front direction and the other end connected to an upper side of the front plate 130 and a rear spring 623 having one end connected to an upper rear of the tub 200 to extend in an upper rear direction and the other end connected to a lower rear side of the top plate 110 .
  • spring fixing members 242 and 252 to which the other ends of the front and rear springs 613 and 623 are connected, are provided at the upper side of the front plate 130 and the lower rear side of the top plate 110 , respectively.
  • the elastic member 600 includes a front spring 614 having one end connected to an upper front side of the tub 200 to extend in an upper front direction and the other end connected to an upper side of the front plate 130 and a rear spring 624 having one end connected to an upper rear of the tub 200 to extend in an upper rear direction and the other end connected to an upper side of the rear plate 150 .
  • spring fixing members 243 and 253 to which the other ends of the front and rear springs 614 and 624 are connected, are provided at the upper side of the front plate 130 and the upper side of the rear plate 150 , respectively.
  • the drum type washing machine according to the present invention has the following effects or advantages.
  • the damper unit including the left and right dampers attenuate the vertical and horizontal vibrations of the tub and the elastic member including the front and rear springs attenuates the front-to-rear vibration as well as the vertical vibration of the tub, whereby the overall vibrations and noise are remarkably reduced.
  • the present invention remarkably reduces the front-to-rear vibration of the tub to prevent the internal parts near the tub from being damaged by shocks according to the vibrations, whereby endurances of the internal parts are preserved.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US10/722,457 2002-11-29 2003-11-28 Drum type washing machine having vibration attenuating means Abandoned US20040154353A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KRP2002-0075318 2002-11-29
KR1020020075318A KR20040047195A (ko) 2002-11-29 2002-11-29 드럼 세탁기

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US20040154353A1 true US20040154353A1 (en) 2004-08-12

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US10/722,457 Abandoned US20040154353A1 (en) 2002-11-29 2003-11-28 Drum type washing machine having vibration attenuating means

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KR (1) KR20040047195A (ko)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114705A (en) * 1962-08-20 1963-12-17 Gen Motors Corp Means for controlling the dampening of an elastically suspended rotating drum duringcentrifuging
US3580014A (en) * 1968-02-13 1971-05-25 Zanussi A Spa Industrie Machine having a rotary motion, especially washing machine, furnished with ballast
US3800567A (en) * 1971-09-18 1974-04-02 J Stelwagen Washing and spin-drying machine with auxiliary mass
US5080204A (en) * 1990-02-09 1992-01-14 Suspa Compart Aktiengesellschaft Frictional vibrator damper
US5207081A (en) * 1990-11-19 1993-05-04 Kabushiki Kaisha Showa Seisakusho Vibration damper assembly
US5230229A (en) * 1991-02-23 1993-07-27 Suspa Compart Aktiengesellschaft Washing machine
US5870907A (en) * 1995-08-29 1999-02-16 Samsung Electronics Co., Ltd. Drum type clothes washer having fluid type vibration attenuation apparatus
US5907880A (en) * 1997-05-15 1999-06-01 Electrolux Zanussi S.P.A. Method for providing active damping of the vibrations generated by the washing assembly of washing machines and washing machine implementing said method
US6151930A (en) * 1997-10-29 2000-11-28 Lord Corporation Washing machine having a controllable field responsive damper
US6574997B1 (en) * 1999-05-07 2003-06-10 Suspa Holding Gmbh Coupling device for coupling a frictional damper to a machine frame of a washing machine
US6782722B2 (en) * 2001-09-25 2004-08-31 Sanyo Electric Co., Ltd. Drum washing machine
US6826932B2 (en) * 2001-09-13 2004-12-07 Sanyo Electric Co., Ltd. Drum-type washing machine
US6974000B2 (en) * 2002-02-20 2005-12-13 Lord Corporation System and method for limiting vibration in an apparatus during a loss of power

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05131075A (ja) * 1991-11-14 1993-05-28 Matsushita Electric Ind Co Ltd ドラム式洗濯機
KR0124297Y1 (ko) * 1994-04-06 1999-05-01 김광호 드럼 세탁기
KR200157097Y1 (ko) * 1996-11-01 1999-09-15 윤종용 드럼 세탁기용 진동 흡수 장치
KR200169590Y1 (ko) * 1997-09-24 2000-02-01 구자홍 드럼세탁기의진동흡수장치
KR200232026Y1 (ko) * 1998-07-29 2001-10-25 윤종용 세탁기

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114705A (en) * 1962-08-20 1963-12-17 Gen Motors Corp Means for controlling the dampening of an elastically suspended rotating drum duringcentrifuging
US3580014A (en) * 1968-02-13 1971-05-25 Zanussi A Spa Industrie Machine having a rotary motion, especially washing machine, furnished with ballast
US3800567A (en) * 1971-09-18 1974-04-02 J Stelwagen Washing and spin-drying machine with auxiliary mass
US5080204A (en) * 1990-02-09 1992-01-14 Suspa Compart Aktiengesellschaft Frictional vibrator damper
US5335522A (en) * 1990-02-12 1994-08-09 Suspa Compart Aktiengesellschaft Washing machine
US5207081A (en) * 1990-11-19 1993-05-04 Kabushiki Kaisha Showa Seisakusho Vibration damper assembly
US5230229A (en) * 1991-02-23 1993-07-27 Suspa Compart Aktiengesellschaft Washing machine
US5870907A (en) * 1995-08-29 1999-02-16 Samsung Electronics Co., Ltd. Drum type clothes washer having fluid type vibration attenuation apparatus
US5907880A (en) * 1997-05-15 1999-06-01 Electrolux Zanussi S.P.A. Method for providing active damping of the vibrations generated by the washing assembly of washing machines and washing machine implementing said method
US6151930A (en) * 1997-10-29 2000-11-28 Lord Corporation Washing machine having a controllable field responsive damper
US6574997B1 (en) * 1999-05-07 2003-06-10 Suspa Holding Gmbh Coupling device for coupling a frictional damper to a machine frame of a washing machine
US6826932B2 (en) * 2001-09-13 2004-12-07 Sanyo Electric Co., Ltd. Drum-type washing machine
US6782722B2 (en) * 2001-09-25 2004-08-31 Sanyo Electric Co., Ltd. Drum washing machine
US6974000B2 (en) * 2002-02-20 2005-12-13 Lord Corporation System and method for limiting vibration in an apparatus during a loss of power

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, GON;KANG, YU BEOM;JE, SANG MAN;REEL/FRAME:015267/0643;SIGNING DATES FROM 20040422 TO 20040423

STCB Information on status: application discontinuation

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