EP2213778A1 - Herstellungsverfahren für Ballastlaugenbehälter für Frontlader-Wäschebehandlungsmaschinen und damit hergestellter Laugenbehälter - Google Patents

Herstellungsverfahren für Ballastlaugenbehälter für Frontlader-Wäschebehandlungsmaschinen und damit hergestellter Laugenbehälter Download PDF

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Publication number
EP2213778A1
EP2213778A1 EP09425033A EP09425033A EP2213778A1 EP 2213778 A1 EP2213778 A1 EP 2213778A1 EP 09425033 A EP09425033 A EP 09425033A EP 09425033 A EP09425033 A EP 09425033A EP 2213778 A1 EP2213778 A1 EP 2213778A1
Authority
EP
European Patent Office
Prior art keywords
tub
disc
shaped member
balancing means
cavity
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.)
Withdrawn
Application number
EP09425033A
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English (en)
French (fr)
Inventor
Roberto Quattrin
Silvano Venuti
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.)
Rosa Plast SpA
Original Assignee
Rosa Plast 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 Rosa Plast SpA filed Critical Rosa Plast SpA
Priority to EP09425033A priority Critical patent/EP2213778A1/de
Publication of EP2213778A1 publication Critical patent/EP2213778A1/de
Withdrawn legal-status Critical Current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
    • D06F37/26—Casings; Tubs

Definitions

  • the present invention refers to a manufacturing process of a ballasted tub for use in connection with oscillating assemblies of laundry treating machines for the treatment of clothes in general, such as clothes washing machines, combined washing and drying machines and clothes drying machines, of the front-loading kind.
  • the present invention further refers to a tub manufactured with such process.
  • Laundry treating machines of the above-noted kind are largely known to comprise a so-called “oscillating" assembly, including a tub adapted to be mounted within an outer casing by means of appropriate vibration-damping devices, a clothes-holding drum rotatably mounted within said tub, motor means for rotatably driving the drum, and a system of masses intended to balance the oscillating movement of the oscillating assembly.
  • Such system of masses commonly known also as "counterweights" in the art - is generally formed of a plurality of blocks made of concrete, or any other suitable material with a high specific weight, and associated to the tub in a variety of manners.
  • these masses, or counterweights, used to balance the oscillating assembly of laundry treating machines may be manufactured, i.e. moulded separately from or independently of the tubs which they are intended to be applied to, in that such masses are first poured into and then allowed to set inside a container, generally of a polymeric material, which is provided with appropriate mounting means for attaching the resulting counterweight to the body of the tub.
  • a container generally of a polymeric material, which is provided with appropriate mounting means for attaching the resulting counterweight to the body of the tub.
  • forming such superstructures on the tub body implies a considerable extent of construction and design complications in the process of making and fabricating the tub, while it would be most desirable and preferable for such complications to be simply avoided.
  • EP 1 522 624 Disclosed in the European patent application EP 1 522 624 is a solution calling for the balancing masses of the oscillating assembly to be accommodated into appropriate cavities provided in the tub.
  • the counterweights are housed in appropriate containers that are associated to a drum-like hollow cylinder so as to close the front and rear end portions thereof and convert in this way the cylinder into an actual tub.
  • the disclosure in EP 1 522 624 suggests that the counterweight be formed by casting concrete into a double-wall jacket extending over the entire side cylinder forming the tub, so that the body of such tub is enabled to also act as the counterweight for the oscillating assembly.
  • the centrifugal force that is generated by the rotary motion of the rotating drum mounted within the tub, and which normally acts upon the mass of clothes to be treated being held in the same drum is such as to bring about a state of stress and a corresponding strain on the tub.
  • stress and the resulting strain induced upon the tub are certainly greater, i.e. stronger in those regions of the tub, in which there are located the motion transmission members used to rotatably drive the drum contained therein, i.e. in at least one of the portions that close the cylindrical side wall of the tub on the rear thereof.
  • tubs of the kind disclosed and proposed in EP 1 522 624 may in the course of time be disadvantageously subject to liquid leakages, or mismatching of parts, in the region thereof where the above-cited drum driving members are coupled with the body of the tub.
  • the blow-moulding technique does not lend itself to forming appropriate reinforcement structures at those portions of the tub body, which are subject to a greater extent of stresses, i.e. undergo greater strain.
  • a further purpose of the present invention is to provide a manufacturing process of a ballasted tub for application to the so-called oscillating assemblies of front-loading laundry treating machines, i.e. machines of the front-loading kind for the treatment of clothes, which is simple to carry out under reduced cycle times as compared with currently used prior-art processes, said process according to the present invention enabling the tub to be quickly assembled.
  • Another purpose of the present invention is to provide a manufacturing process of a ballasted tub, which is effective in doing away with any need whatsoever for superstructures to be provided, as they are usually required to allow the balancing masses of the oscillating assembly to be attached and secured thereto, while allowing for a general simplification in the structure and construction of the same tub.
  • Yet another purpose of the present invention is to provide a tub for application to the so-called oscillating assemblies of laundry treating machines of the front-loading kind, which effectively withstands the stresses it is due to be subject to during the normal operation of the machine, wherein such tub further has a structure that is more rigid than the one of prior-art tubs in general, although it is manufactured using a smaller amount of raw material.
  • Still another, equally important purpose of the present invention is to provide a tub, whose structural properties are such as to allow for a shorter distance to be maintained between the cylindrical side wall, or periphery, of the rotating drum inside the tub and the cylindrical side wall, or periphery, of the same tub, thereby enabling a greater volume, i.e. loading capacity of the drum to be provided for a same overall dimension of the oscillating assembly.
  • a further purpose of the present invention is also to provide a tub for application to the so-called oscillating assemblies of laundry treating machines of the front-loading kind, which allows for an improved, more rational layout and general arrangement of the functional and operating parts of the machine, such as for instance a condenser and a portion of the drying-air circuit in such laundry treating machine as a washer-drier.
  • a tub 1 for oscillating assemblies of front-loading laundry treating machines in general comprises a first body 2 that forms a rear portion of the tub 1, and a second body 3 that forms the front portion of the tub 1.
  • the first body 2 comprises a drum-like side wall 4 that has a substantially cylindrical shape and is provided with a first end region 5, which is partially closed by a wall 6 formed integrally, i.e. as a unitary single-piece construction with the cylindrical side wall 4 and extends transversally relative to the latter.
  • the wall 6 forms the bottom of the tub 1 and is provided with an aperture 7 adapted to receive and accommodate a drive shaft, which is intended to transmit motion to a drum rotatably mounted within the tub 1, and is adapted to receive and hold the laundry items to be treated therein.
  • the cylindrical side wall 4 of the first body 2 comprises a second end region 8, which is however open.
  • the second body 3 of the tub 1 comprises a second drum-like side wall 9 that has a substantially cylindrical shape and is provided with a first end region 10 of its own.
  • This end region 10 is in turn provided with a wall 11 formed integrally, i.e. as a unitary single-piece construction with the cylindrical side wall 9, wherein such wall 11 extends transversally relative to the plane of extension of said cylindrical side wall 9 and includes an aperture 12, which practically forms a loading opening provided to allow a user to gain access into the inner cavity of a clothes-holding drum in view of placing the laundry items to be treated thereinto.
  • a second open end region 17 is provided on the cylindrical side wall 9 for it to be associated to the second end region of the first body 2, so as to form a container 13 in a substantially cylindrical shape.
  • the bottom wall 6 of this container 13 is further reinforced through the provision of a disc-shaped member 14 that is associated to the wall 6 from outside, i.e. from the opposite side relative to the one where the drum-holding cavity formed by the union of the above-mentioned pair of bodies 2, 3 lies.
  • the contour of the bottom wall 6 of the tub 1 and the corresponding contour of the disc-shaped member 14 are such that, when said disc-shaped member 14 is associated to the wall 6, the resulting association brings about, i.e. forms a cavity 15 delimited by the outer surface 18 ( Figure 5a ) of the bottom wall 6 and the inner surface 19 ( Figure 3b ) of the disc-shaped member 14.
  • this disc-shaped member 14 is on the other hand provided with an aperture 16, which is so arranged as to lie coaxially with the aperture 7 provided in the wall 6 of the body 2.
  • the aperture 16 performs the same duty, i.e. is used to the same purpose as the afore-described aperture 7.
  • the axis X which is common to both such apertures 7 and 16, coincides with the axis of rotation of the drum that is mounted rotatably inside the tub 1.
  • the protruding end portion 24 of this housing structure 20 is received into the aperture 7 provided in the bottom wall 6 of the tub 1, as this is best shown in Figure 2 .
  • the association of the disc-shaped member 14 with the first body 2 of the tub 1 may be made by joining the two parts not only along the edge that defines the aperture 7, but also along the outermost peripheral edge of the disc-shaped member 14, and may be further strengthened by properly joining a plurality of projections 26, which may be provided either solely on the outer surface 18 of the bottom wall 6 of the tub body 2, as this is best illustrated in Figure 5a , or solely on the inner surface 19 of the disc-shaped member 14, or, again, in corresponding positions on both said surfaces 18 and 19, wherein these projections 26 should in this case be provided with conjugate surfaces to allow them to be mutually coupled by the matching of shapes.
  • these projecting members 26 have additionally the purpose of enabling a counterweight to be positioned such that this mass, due to the disc-shaped member 14 being then joined to the bottom wall 6 in the above-described manner, becomes firmly joined, i.e. practically integral with these two parts, thereby creating a single structure.
  • FIG. 6 Represented in the illustration of Figure 6 there is a first modified embodiment 14' of the disc-shaped member.
  • the disc-shaped member 14' according to this first modified embodiment is no longer provided with an inner surface 19 that is continuous and free from any further aperture other than the aperture 16 provided for the motion-transmission, i.e. driving members as described hereinbefore.
  • Such disc-shaped member 14' is rather formed of a ring-shaped portion 21 provided with a plurality of spokes 22 converging towards the aperture 16' and spaced from each other by the interposition of apertures 23 in a substantially triangular or trapezoidal shape, so as to form a radiate arrangement.
  • a housing structure 20' that protrudes from the inner surface 19' of the disc-shaped member 14' so as to create an accommodation adapted to receive one or more bearings on an appropriate, preferably metal support for a driving shaft to be able to rotate therein.
  • the protruding end portion 24' of this housing structure 20' is again received into the aperture 7 provided in the bottom wall 6 of the tub 1.
  • FIG. 6a and 6b Represented in the illustrations of Figures 6a and 6b there is a second modified embodiment 14" of the disc-shaped member as viewed from the rear side ( Figure 6a ) and the front side ( Figure 6b ) thereof.
  • a balancing mass 25 in the condition in which it is mounted on to the disc-shaped member 14".
  • said balancing mass 25 will be accommodated in the cavity 15 that forms between the outer surface 18 of the bottom wall 6 of the tub and the inner surface 19" of the disc-shaped member 14".
  • the disc-shaped member 14" comprises a plurality of pockets 38 provided all around the aperture 16. These pockets 38 are defined by a plurality of walls 40 arranged radially around the aperture 16 on the rear side of the disc-shaped member 14", i.e. on the side lying opposite to the one that is associated to the rear body 2 of the tub 1. Between two adjacent ones of these walls 40 there are formed cavities 39 having a bottom end portion that is closed by a portion of the inner surface 19"; in other words, these cavities 39 are such that the disc-shaped member 14" ultimately features an imperforated ring-shaped wall 41, which therefore is free from through-apertures, and which extends all around the aperture 16. In the illustration of Figure 6b , there can be noticed how these cavities 39 of the pockets 38 are closed at the bottom thereof and said ring-shaped surface 41 is imperforated and, as a result, free from any possible structurally weakening element, actually.
  • the above-mentioned pockets 38 are provided in view of lightening the structure of the disc-shaped member 14" in the region extending immediately around the housing structure 20, thereby advantageously saving a significant amount of preferably polymeric material, while still ensuring an adequate structural strength of the tub 1. Even the cycle time required to manufacture the disc-shaped member 14" is shorter than the one required to manufacture the afore-described disc-shaped member 14 made in accordance with the embodiment represented in Figures 1 , 2 , 3a, 3b .
  • this modified embodiment of the disc-shaped member 14" may be provided, in the inner surface 19" of the ring-shaped wall 41, with a plurality of projections 26 in the same way as this has been described with reference to the disc-shaped member 14. As this shall be described in greater below, these projections 26 are effective in enabling a balancing mass 25 to be secured thereto.
  • balancing means 25 adapted to dampen the oscillations, i.e. the vibrations which the tub 1 - and, as a result, the whole oscillating assembly of which the tub 1 is a part - is subject to when the laundry treating machine comprising said tub 1 is operating.
  • These balancing means 25 are comprised of a mass of material having a high specific weight (typically greater than or equal to 2.6 kg/dm 3 ), such as for instance cement, concrete or compounds thereof containing metal materials.
  • the above-cited balancing means 25 may be placed into the cavities 15 and 15' either in a solid form or, if the material which they are made of allows it, in a liquid form.
  • the balancing means 25 when a disc-shaped member 14' made and shaped according to the first modified embodiment shown in Figure 6 is used as the disc-shaped member associated to the inventive tub, the balancing means 25 must necessarily be in a solid form and may be accommodated in the cavities 15' either completely or in a way in which they just partly protrude from the apertures 23 in the rear portion of the tub 1.
  • the balancing means 25 will work not only as balancing masses to oppose and dampen the vibrations of the oscillating assembly which the tub 1 is a part of, but also as a reinforcement structure for those portions of the tub 1, which are more subject to stresses during the operation of the machine, in which the same tub 1 is incorporated.
  • stiffening ribs 32 may be formed on the inner surface 19, 19', 19" of the disc-shaped member 14, 14', 14" and/or the outer surface 18 of the bottom wall 6 of the tub body 2 there may be formed stiffening ribs 32.
  • second balancing means 37 may be provided on the front portion of the tub 1 in the vicinity of the aperture 12 provided in the second tub body 3. Attaching said second balancing means 37 on to the body 3 of the tub 1 is done using such methods and means as they are largely known as such in the art, such as for instance screws.
  • FIG. 7 Illustrated in Figure 7 is a possible configuration of the balancing means 25, as arranged in the cavity 15.
  • the mass 25 and a disc-shaped member which may be made according to the embodiments that are indicated with the reference numerals 14 and 14' in Figures 1 , 2 , 3a, 3b and 6a, 6b , respectively.
  • this mass 25 fills up the cavity 15 only partially to thereby create a discontinuity 27 situated in correspondence to the motor means 28 provided to rotatably drive a drum adapted to receive and hold the laundry items to be treated, and rotatably mounted inside the tub 1 to that purpose, wherein such motor means are schematically represented by a circle in the Figure.
  • the balancing means 25 are further provided with bores 29, through which the projections 26 represented in Figure 5a are able to pass.
  • Figure 8 illustrates a schematical, cross-sectional representation of a tub 1, in which the balancing means 25 act as a support for motor means 28 provided coaxially with the axis of rotation X of the drum mounted rotatably within the tub 1 to receive and hold the laundry items to be treated. Securing the motor 28, and in particular the stator portion thereof, to the balancing means or, more generally, to the tub is done with the aid of screw means 29 passing through the wall of the disc-shaped member 14, 14" and accommodated into blind bores 31 provided in the balancing mass 25. Also to be seen in Figure 8 is the motion-transmission, i.e. drive shaft 30 for a drum to be attached thereto by a shrink-fitting or similar process.
  • the motion-transmission i.e. drive shaft 30 for a drum to be attached thereto by a shrink-fitting or similar process.
  • FIG. 9 Represented in Figure 9 is a so-called oscillating assembly including a tub 1 made and provided according to the present invention.
  • This tub 1 is fitted out with some functional component parts as needed to enable a laundry treating machine to perform a laundry treatment process.
  • the tub 1 is capable of being mounted in a so-called washer-drier, i.e. a combined clothes washing and drying machine, since it is provided with a condenser 33 of the water-spray cooled type housed within a conduit 34 in which there is circulated a flow of clothes drying air by a fan 35 that is driven via a set of pulleys 36.
  • the operation of the machine for the treatment of laundry items includes or calls for the laundry items being treated to undergo a spin-drying cycle under hot conditions
  • the preferably polymeric material, which the tub is made of to possess any particularly high mechanical strength or performance ability under high-temperature conditions, thereby enabling lower-performance materials and, therefore, less expensive materials to be used, since the structural strength of the bottom of the tub is in fact ensured by the provision of the counterweight.
  • this includes forming a first and a second body 2, 3, each one of them comprising a substantially cylindrical drum-like side portion 4, 9, in which a first end region 5, 10 thereof is at least partly closed by a wall 6, 11 that extends transversally relative to the extension plane of said drum-like side portion 4, 9.
  • Each such cylindrical drum-like side portion 4, 9 further comprises a second end region 8, 17, which is on the contrary open.
  • the process according to the present invention further includes forming a disc-shaped member 14, 14', 14", and associating this member to said first end region 5 of the first body 2 of the tub 1 so that, between the disc-shaped member 14 and the bottom wall 6 of the tub body 2, there are created one or more cavities 15, 15'.
  • Balancing means 25 are then provided and arranged so that, upon conclusion of the preceding step of associating the disc-shaped member 14, 14', 14" to the tub body 2, said balancing means 25 turn out as being at least partly housed within said one or more cavities 15, 15'.
  • the mass 25 can be cast into the whole cavity 15, or a part thereof, in a liquid state thereof after that the disc-shaped member 14, 14" and the body 2 of the tub 1 have been associated with each other, and then allowed to set, i.e. become solid there.
  • the mass 25 in a solid form may be arranged and accommodated between the disc-shaped member 14, 14', 14" and the body 2 of the tub 1 prior to these part being associated to each other.
  • the mass 25 can be associated, e.g.
  • the solid balancing mass 25 there may be provided bores 29 for the projections 26 formed on the disc-shaped member 14, 14' and/or the bottom wall 6 of the tub body 2 to be able to be fitted therethrough.
  • These projecting members 26 may be provided in any appropriate shape in view of creating a structure suitable to enable a balancing mass 25 to be positioned such that it - following the disc-shaped member 14, 14" having been joined to the bottom wall 6 - becomes practically integral with both said disc-shaped member and said bottom wall to create a single structure therewith.
  • the process for manufacturing a tub 1 according to the present invention is preferably and advantageously carried out by using materials of a polymeric type.
  • the tub is advantageously capable of being fabricated with the use of a smaller amount of raw materials as compared with prior-art tubs of the considered kind, and is therefore featuring a lower weight than the tubs used and known in the art hitherto. Furthermore, this process is such as to enable the geometry of the tub to be simplified by doing away with the usually provided structures for the attachment of the counterweights, which are generally known as to be likely to turn into possible sources of structural failure of the tub.
  • a further advantage of the tubs for use in laundry treating machines of the front-loading type made according to the present invention derives from the fact that the distance between the cylindrical side portion of the tub and the cylindrical side portion of the rotating drum mounted within the same tub can be reduced as compared to the one generally needed in prior-art tub and drum assemblies.
  • a tub made according to the present invention further enables the distribution of the balancing masses within the body of the same tub to be appropriately sized and selected so as to most effectively cope with the distribution of the weights or loads on the oscillating assembly, without any need arising for the overall outer size of such assembly to be increased.
  • Still another advantage offered by a tub made according to the present invention lies in the fact that the mass used to act as a counterweight, i.e. to balancing purposes, may at the same time be used as a support for the motor means provided to drive the rotating drum to be anchored thereto by arranging them along the axis of rotation of the same drum.
  • the counterweight will not only work to ensure the usual balancing duty thereof to balance the oscillating assembly, but will also perform as a reinforcement structure for those portions of the tub body, which are subject to a greater extent of stresses, i.e. tend to undergo greater strain in operation.
  • the usual reinforcement ribs that have traditionally been used on the rear portion of the tub shall not be needed in a tub made according to the present invention any longer, thereby achieving the advantageous effect of lightening the construction of the tub and reducing the amount of material needed to produce it.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP09425033A 2009-02-02 2009-02-02 Herstellungsverfahren für Ballastlaugenbehälter für Frontlader-Wäschebehandlungsmaschinen und damit hergestellter Laugenbehälter Withdrawn EP2213778A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09425033A EP2213778A1 (de) 2009-02-02 2009-02-02 Herstellungsverfahren für Ballastlaugenbehälter für Frontlader-Wäschebehandlungsmaschinen und damit hergestellter Laugenbehälter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09425033A EP2213778A1 (de) 2009-02-02 2009-02-02 Herstellungsverfahren für Ballastlaugenbehälter für Frontlader-Wäschebehandlungsmaschinen und damit hergestellter Laugenbehälter

Publications (1)

Publication Number Publication Date
EP2213778A1 true EP2213778A1 (de) 2010-08-04

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EP09425033A Withdrawn EP2213778A1 (de) 2009-02-02 2009-02-02 Herstellungsverfahren für Ballastlaugenbehälter für Frontlader-Wäschebehandlungsmaschinen und damit hergestellter Laugenbehälter

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2949805A1 (de) * 2014-05-28 2015-12-02 Whirlpool Corporation Wäschebehandlungsanwendung und wannenanordnung und verfahren zur herstellung
CN110714293A (zh) * 2019-10-14 2020-01-21 青岛海尔洗衣机有限公司 波轮洗衣机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654443A1 (fr) * 1989-11-15 1991-05-17 Zanussi A Spa Industrie Machine a laver le linge a cuve lestee.
EP0561201A1 (de) * 1992-03-16 1993-09-22 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Verbesserung in der Struktur einer Waschmaschine
EP0601347A1 (de) * 1992-12-07 1994-06-15 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Verbesserung in den aus Kunststoff hergestellten Laugenbehältern für Waschmaschinen
FR2789620A1 (fr) 1999-02-12 2000-08-18 Sartech Procede et dispositif de fabrication de contrepoids d'equilibrage et contrepoids ainsi obtenus
EP1522624A2 (de) 2003-10-08 2005-04-13 Francesco Bonicelli Laugenbehälter mit Ballastgewicht für eine oszillierende Einheit eines elektrischen Haushaltgerätes, und Herstellungsverfahren
WO2007115894A1 (en) * 2006-04-12 2007-10-18 BSH Bosch und Siemens Hausgeräte GmbH Tub for washing machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654443A1 (fr) * 1989-11-15 1991-05-17 Zanussi A Spa Industrie Machine a laver le linge a cuve lestee.
EP0561201A1 (de) * 1992-03-16 1993-09-22 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Verbesserung in der Struktur einer Waschmaschine
EP0601347A1 (de) * 1992-12-07 1994-06-15 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Verbesserung in den aus Kunststoff hergestellten Laugenbehältern für Waschmaschinen
FR2789620A1 (fr) 1999-02-12 2000-08-18 Sartech Procede et dispositif de fabrication de contrepoids d'equilibrage et contrepoids ainsi obtenus
EP1522624A2 (de) 2003-10-08 2005-04-13 Francesco Bonicelli Laugenbehälter mit Ballastgewicht für eine oszillierende Einheit eines elektrischen Haushaltgerätes, und Herstellungsverfahren
WO2007115894A1 (en) * 2006-04-12 2007-10-18 BSH Bosch und Siemens Hausgeräte GmbH Tub for washing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2949805A1 (de) * 2014-05-28 2015-12-02 Whirlpool Corporation Wäschebehandlungsanwendung und wannenanordnung und verfahren zur herstellung
US9828717B2 (en) 2014-05-28 2017-11-28 Whirlpool Corporation Laundry treating appliance and tub assembly and method of forming
CN110714293A (zh) * 2019-10-14 2020-01-21 青岛海尔洗衣机有限公司 波轮洗衣机

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