EP0725179B1 - Improvement in the unbalance preventing arrangement of the drum of a clothes washing machine - Google Patents

Improvement in the unbalance preventing arrangement of the drum of a clothes washing machine Download PDF

Info

Publication number
EP0725179B1
EP0725179B1 EP96100061A EP96100061A EP0725179B1 EP 0725179 B1 EP0725179 B1 EP 0725179B1 EP 96100061 A EP96100061 A EP 96100061A EP 96100061 A EP96100061 A EP 96100061A EP 0725179 B1 EP0725179 B1 EP 0725179B1
Authority
EP
European Patent Office
Prior art keywords
drum
washing machine
hollow bodies
clothes washing
machine according
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.)
Expired - Lifetime
Application number
EP96100061A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0725179A1 (en
Inventor
Piero Durazzani
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.)
Electrolux Zanussi SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Electrolux Zanussi SpA
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 Electrolux Zanussi Elettrodomestici SpA, Electrolux Zanussi SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0725179A1 publication Critical patent/EP0725179A1/en
Application granted granted Critical
Publication of EP0725179B1 publication Critical patent/EP0725179B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets

Definitions

  • the present invention refers to a clothes washing machine, in particular of the household type, provided with a washload holding drum that has an improved dynamic balancing arrangement.
  • the rotatable drum includes a generally cylindrical outer wall, a first disk and a second disk.
  • the first disk is provided for forming a first end wall of the drum and includes a balancing means including a plurality of concentric annular chambers.
  • the second disk is provided for forming a second end wall of the drum, opposite to the first end wall, and includes balancing means with a plurality of concentric annular chambers.
  • the present invention substantially consists in providing a plurality of annular hollow bodies having different diameters and containing a respective plurality of movable balancing weights, in subdividing said plurality of hollow bodies into two distinct assemblies, and in applying the hollow bodies of each such assembly against a respective base of the cylinder formed by the drum, the hollow bodies of each such assembly being therefore substantially coplanar with each other and coaxial with the axis of the drum.
  • a washload holding drum made preferably of metal and of a generally per sè known type, which substantially consists of a rigid structure formed by a cylindrical peripheral mantle 1 and two bases 2 and 3, one of which carries the spider member and the related shaft 4, while the other one forms the loading opening 5.
  • each one of such bases a respective assembly 6, 7 is applied, which is formed by a corresponding plurality of distinct hollow bodies 8, such as this is shown in Figure 1.
  • a second improvement as illustrated in Figures 6 and 7, relies on the fact that the hollow bodies comprised in at least one of said assemblies are provided by joining together two substantially symmetrical parts 9, 10, each one of which is formed by a plurality of co-planar, concentric circular grooves 11 that are open toward the same side in an orthogonal direction with respect to the co-planarity plane.
  • Such grooves are appropriately and partially filled with movable balancing masses whose weight, size, shape and distribution can be freely selected by anyone skilled in the art in accordance with the desired results and the acceptable extent of trade-offs.
  • said two complementary parts 9, 10 are joined together to form a single member.
  • the hollow bodies of said assemblies are contiguous, in the sense that the outer periphery of the inner annular hollow body substantially coincides with the inner periphery of the adjoining outer annular hollow body.
  • said hollow bodies are separated from each other by a single common intermediate wall.
  • each one of said brackets is applied on to the outer cylindrical surface of the drum with a parallel orientation with respect to the axis thereof, while their respective gripping members 16 are caused to engage, thanks to their claw-like configuration, against corresponding pairs of frontally opposing sectors that are respectively arranged on the outer edges 18 of said assemblies 6, 7.
  • said brackets form the mutual clamping members of said assemblies, while not actually engaging the drum in any structural manner, so as to avoid passing on to it the stresses deriving from the attachment of said assemblies and, therefore, putting any resulting mechanical load on to it.
  • engaging elements 18 in view of boosting the stability of said brackets it is advantageous for engaging elements 18 to be provided which protrude from their intermediate zone and are capable of engaging the underlying surface of the drum without passing on any excessive or unbalanced strain to it.
  • a manufacturability improvement is furthermore obtained if the parts making up each assembly are made in a single-piece or integral construction and are then joined, upon insertion of the movable balancing weights, using a specular assembly technique.
  • a further optimization of the present invention refers to the possible integration of the inner parts of said assemblies 6, 7 with the drum which they are associated with.
  • Such an integration enables considerable advantages of a constructional and economic nature to be obtained and consists in making, using readily available techniques, both the drum and the inner parts of said assemblies formed by the related hollow bodies in a single-piece or integral construction.
  • such an improvement is implemented through the use of an appropriate plastic material that is adapted to be processed for making both the drum and said assemblies, thereby further giving the opportunity of avoiding the presence and the assembly of the afore cited brackets, with resulting considerable advantages in terms of costs and constructional simplification.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Centrifugal Separators (AREA)
EP96100061A 1995-02-01 1996-01-04 Improvement in the unbalance preventing arrangement of the drum of a clothes washing machine Expired - Lifetime EP0725179B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1995PN000006U IT238832Y1 (it) 1995-02-01 1995-02-01 Lavabiancheria con cesto antisbilanciamento perfezionato
ITPN950006U 1995-02-01

Publications (2)

Publication Number Publication Date
EP0725179A1 EP0725179A1 (en) 1996-08-07
EP0725179B1 true EP0725179B1 (en) 2000-07-05

Family

ID=11394984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100061A Expired - Lifetime EP0725179B1 (en) 1995-02-01 1996-01-04 Improvement in the unbalance preventing arrangement of the drum of a clothes washing machine

Country Status (6)

Country Link
EP (1) EP0725179B1 (it)
JP (1) JPH08252391A (it)
CA (1) CA2168385A1 (it)
DE (1) DE69609090T2 (it)
ES (1) ES2150023T3 (it)
IT (1) IT238832Y1 (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7827834B2 (en) 2005-09-30 2010-11-09 Lg Electronics Inc. Bearing housing assembly of drum-type washing machine and drum-type washing machine with the same
US7841220B2 (en) 2005-09-30 2010-11-30 Lg Electronics Inc. Drum-type washing machine
US7930910B2 (en) 2002-12-27 2011-04-26 Lg Electronics Inc. Drum type washing machine
US8087267B2 (en) 2002-12-27 2012-01-03 Lg Electronics Inc. Drum type washing machine
USRE43625E1 (en) 2006-03-29 2012-09-04 Lg Electronics Inc. Drum type washing machine
US8429938B2 (en) 2004-07-20 2013-04-30 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69608876T3 (de) † 1995-12-28 2006-05-24 Samsung Electronics Co., Ltd., Suwon Trommelmaschine mit Auswuchtvorrichtungen
JPH1119384A (ja) * 1997-06-26 1999-01-26 Samsung Electron Co Ltd ドラム式洗濯機用バランサー内にボールを供給するための装置
MY129598A (en) * 1997-06-26 2007-04-30 Samsung Electronics Co Ltd Manufacturing methods and apparatus for removing residual water from a ball balancer of a drum washing machine.
KR100587307B1 (ko) * 2004-06-09 2006-06-08 엘지전자 주식회사 드럼세탁기 및 드럼세탁기의 드럼
EP2354293B1 (en) * 2006-06-01 2017-11-01 Samsung Electronics Co., Ltd. Washing machine having balancer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1213067A (fr) * 1957-11-08 1960-03-29 Frame Machine à laver
DE1912481U (de) * 1961-07-24 1965-03-18 Siemens Elektrogeraete Gmbh Einrichtung zum schleudern von wasche mit elastischer aufhaengung des trommelaggregats.
JPS5351671A (en) * 1976-10-20 1978-05-11 Hitachi Ltd Drum type washing machine
GB1598399A (en) * 1977-06-02 1981-09-16 Hitachi Ltd Drum type automatic electric washing machine
US5345792A (en) * 1992-12-28 1994-09-13 Whirlpool Corporation Balancer for an automatic washer
ITPN940005A1 (it) * 1994-01-28 1995-07-28 Zanussi Elettrodomestici Lavabiancheria con dispositivo perfezionato di bilanciamento dinamico

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8387421B2 (en) 2002-12-27 2013-03-05 Lg Electronics Inc. Drum-type washing machine
US7930910B2 (en) 2002-12-27 2011-04-26 Lg Electronics Inc. Drum type washing machine
US8336339B2 (en) 2002-12-27 2012-12-25 Lg Electronics Inc. Drum type washing machine
US8087267B2 (en) 2002-12-27 2012-01-03 Lg Electronics Inc. Drum type washing machine
US8156770B2 (en) 2002-12-27 2012-04-17 Lg Electronics, Inc. Drum type washing machine
US8322170B2 (en) 2002-12-27 2012-12-04 Lg Electronics Inc. Drum-type washing machine
US8887537B2 (en) 2002-12-27 2014-11-18 Lg Electronics Inc. Drum-type washing machine
US8671719B2 (en) 2002-12-27 2014-03-18 Lg Electronics Inc. Drum type washing machine
US8336340B2 (en) 2002-12-27 2012-12-25 Lg Electronics Inc. Drum-type washing machine
US8302434B2 (en) 2002-12-27 2012-11-06 Lg Electronics Inc. Drum-type washing machine
US8646292B2 (en) 2002-12-27 2014-02-11 Lg Electronics Inc. Drum type washing machine
US8616027B2 (en) 2002-12-27 2013-12-31 Lg Electronics Inc. Drum type washing machine
US8646293B2 (en) 2002-12-27 2014-02-11 Lg Electronics Inc. Drum type washing machine
US8341983B2 (en) 2002-12-27 2013-01-01 Lg Electronics Inc. Drum-type washing machine
US8726702B2 (en) 2004-07-20 2014-05-20 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8783072B2 (en) 2004-07-20 2014-07-22 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8429938B2 (en) 2004-07-20 2013-04-30 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8434334B2 (en) 2004-07-20 2013-05-07 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8677787B2 (en) 2004-07-20 2014-03-25 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8931312B2 (en) 2004-07-20 2015-01-13 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8800326B2 (en) 2004-07-20 2014-08-12 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8887538B2 (en) 2004-07-20 2014-11-18 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8671718B2 (en) 2005-09-30 2014-03-18 Lg Electronics Inc. Drum-type washing machine
US7827834B2 (en) 2005-09-30 2010-11-09 Lg Electronics Inc. Bearing housing assembly of drum-type washing machine and drum-type washing machine with the same
US8234890B2 (en) 2005-09-30 2012-08-07 Lg Electronics Inc. Drum-type washing machine
US8225628B2 (en) 2005-09-30 2012-07-24 Lg Electronics Inc. Drum-type washing machine
US8220294B2 (en) 2005-09-30 2012-07-17 Lg Electronics Inc. Drum-type washing machine
US7841220B2 (en) 2005-09-30 2010-11-30 Lg Electronics Inc. Drum-type washing machine
USRE44795E1 (en) 2006-03-29 2014-03-11 Lg Electronics Inc. Drum type washing machine
USRE44674E1 (en) 2006-03-29 2013-12-31 Lg Electronics Inc. Drum type washing machine
USRE44511E1 (en) 2006-03-29 2013-10-01 Lg Electronics Inc. Drum type washing machine
USRE44028E1 (en) 2006-03-29 2013-02-26 Lg Electronics Inc. Drum type washing machine
USRE43625E1 (en) 2006-03-29 2012-09-04 Lg Electronics Inc. Drum type washing machine

Also Published As

Publication number Publication date
ITPN950006V0 (it) 1995-02-01
JPH08252391A (ja) 1996-10-01
DE69609090D1 (de) 2000-08-10
DE69609090T2 (de) 2001-03-15
EP0725179A1 (en) 1996-08-07
ES2150023T3 (es) 2000-11-16
CA2168385A1 (en) 1996-08-02
ITPN950006U1 (it) 1996-08-01
IT238832Y1 (it) 2000-11-15

Similar Documents

Publication Publication Date Title
EP0725179B1 (en) Improvement in the unbalance preventing arrangement of the drum of a clothes washing machine
US5345792A (en) Balancer for an automatic washer
US5746069A (en) Clothes washing machine having upper and lower dynamic balancers
EP1770199B1 (en) Bearing housing assembly of drum-type washing machine and drum-type washing machine with the same
US8671718B2 (en) Drum-type washing machine
US8302434B2 (en) Drum-type washing machine
JP2957144B2 (ja) 洗濯機用ボールバランサ
EP0781882B1 (en) Drum appliances with balancing devices
KR100513033B1 (ko) 하부 발란서가 구비된 세탁기
EP2752516B1 (en) Balancer and washing machine having the same
EP2759628B1 (en) Washing machine
CN101643993A (zh) 球式平衡器和具有该球式平衡器的洗衣装置
JPH09262394A (ja) 洗濯機のバランサー
EP2435620B1 (en) Laundry machine
EP0497109B1 (en) Ballasted tub for washing machines
WO2009027407A1 (en) A washing machine
EP0810318A1 (en) Washing machine
CN102301058A (zh) 洗衣机
EP0926290B1 (en) Washing machine with improved anchoring means for the washing assembly
WO2006072907A1 (en) A washer/dryer
KR100360227B1 (ko) 세탁기의 액체 밸런서
EP3899124A1 (en) A laundry washer-dryer having a tub with improved mechanical strength
KR102116527B1 (ko) 세탁기의 밸런서
EP3957790B1 (en) A washing machine having a tub with ribs
WO1995020702A1 (en) Improvement in the dynamic balancing arrangement of a clothes washing machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19970115

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ELECTROLUX ZANUSSI S.P.A.

17Q First examination report despatched

Effective date: 19981023

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed

Owner name: PROPRIA S.R.L.

17Q First examination report despatched

Effective date: 19981023

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 69609090

Country of ref document: DE

Date of ref document: 20000810

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2150023

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021209

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20021212

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021213

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20021230

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20030114

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040105

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040803

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040104

EUG Se: european patent has lapsed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050104

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20040105