EP0401767B1 - A dishwasher having a removable, vertically adjustable basket - Google Patents

A dishwasher having a removable, vertically adjustable basket Download PDF

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Publication number
EP0401767B1
EP0401767B1 EP90110645A EP90110645A EP0401767B1 EP 0401767 B1 EP0401767 B1 EP 0401767B1 EP 90110645 A EP90110645 A EP 90110645A EP 90110645 A EP90110645 A EP 90110645A EP 0401767 B1 EP0401767 B1 EP 0401767B1
Authority
EP
European Patent Office
Prior art keywords
collector
connecting pipe
dishwasher
basket
tank
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
EP90110645A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0401767A1 (en
Inventor
Alladino Borghese
Claudio Milocco
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.)
Industrie Zanussi SpA
Original Assignee
Industrie 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 Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT90110645T priority Critical patent/ATE99521T1/de
Publication of EP0401767A1 publication Critical patent/EP0401767A1/en
Application granted granted Critical
Publication of EP0401767B1 publication Critical patent/EP0401767B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/50—Racks ; Baskets
    • A47L15/508—Hydraulic connections for racks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the present invention relates to a domestic dishwasher equipped with removable baskets for supporting the dishes to be washed, at least one of said baskets being selectively adjustable in height.
  • WO 83/01892 discloses a dishwasher of this type comprising a washing tank housing a lower and an upper basket each having rotating spray arms disposed therebelow. Both baskets are removable and the upper one is selectively adjustable in height, that is, it can be disposed on a first or a second level depending on the dimensions of the dishes disposed in the baskets.
  • the arm associated with the basket is supported by the basket and may be removed together with it.
  • the upper arm is equipped with a connecting pipe extending horizontally, between the arm and the basket, toward the back wall of the washing tank and adapted to join up in detachable fashion with a water supply pipe extending vertically in correspondence with the back wall of the tank.
  • the connecting pipe is designed at one end with a box collector extending upward and equipped with two vertically spaced holes adapted to be selectively coupled with a discharge opening of the supply pipe when the basket is disposed in each adjustable position.
  • flexible bellows extend from each hole of the box collector toward the supply pipe.
  • one of the bellows connects the outlet of the supply pipe with the connecting pipe of the upper arm, while the other tightly closes the other hole of the collector, resting against the back wall of the tank.
  • a dishwasher of this type is quieter and easier to dimension than the solutions in which, as described for example in British patent no. 1 514 652, the upper arm is supplied from above via an interruption in the air that causes undesirable noise and necessitates a hydraulic circuit with critical dimensioning for restoring the water pressure.
  • a dishwasher of the above-mentioned type has the disadvantage that when the upper basket is in the lower adjustable position - which is the one normally employed by the user - the supply water to the upper arm follows a devious path, which results in undesirable hydraulic noise and substantial head losses that limit the performance of the machine.
  • the path of the water includes three successive 90° bends in the passage from the supply pipe to the upper hole of the collector, downward within the collector and then toward the connecting pipe of the upper arm.
  • Each discharge hole of the supply pipe is equipped with a valve comprising a disk obstructor equipped with a compression spring adapted to maintain it normally in a position closing the hole.
  • Each obstructor is adapted to slide axially along a guide retainer, overcoming the force of the spring, when the end of the connecting pipe is inserted into the respective hole, which is therefore open.
  • the main object of the present invention is to provide a dishwasher having a removable, vertically adjustable basket wherein the arm has the maximum length permitted by the geometrical features of the washing tank.
  • Another object of the invention is to provide a dishwasher of the aforesaid type wherein the hydraulic circuit for supplying the arm has low hydraulic noise and reduced head losses, requires a minimal number of components and is reliable in operation.
  • the inventive dishwasher basically comprises a washing tank 6 having a parallelepiped shape with a square or rectangular plan, and housing a lower basket 7 and an upper basket 8 adapted to be pulled out to be loaded with the dishes.
  • An associated rotating spray arm 9, 10 is disposed below each basket.
  • upper basket 8 is selectively adjustable in height, in a way known as such and not shown, between at least a first position (shown in Fig. 1) and one second upper position.
  • the distance between the first and second positions is preferably in the range of a few centimeters.
  • Arm 10 associated with upper basket 8 is supported rotatingly by the basket in a way that is known and not shown.
  • arm 10 rotates about a substantially vertical axis and has the maximum length permitted by the geometrical features of tank 6 in such a way as to occupy the maximum possible area during its rotation, thereby producing an optimal washing effect.
  • arm 10 is adapted to be supplied with washing water via a connecting pipe 11 disposed substantially horizontally between the arm and corresponding basket 8 and extending toward back wall 12 of tank 6, where it is adapted to join up in detachable fashion with a box collector 13 that will be described in the following and is disposed in correspondence with back wall 12 of the tank.
  • a water supply pipe extends within tank 6 from the bottom thereof, having a first inclined or substantially vertical portion 14 adjacent one corner 15 of the tank, and a second substantially horizontal portion 16 adjacent back wall 12 of tank 6 that joins up laterally with collector 13.
  • the shape and position of the supply pipe are such that it does not impede the rotation of arm 10, although the latter is fairly long, when basket 8 is in any of the vertically adjustable positions mentioned above.
  • collector 13 has a substantially C-shaped longitudinal section and comprises a flat central portion 17 having valve portions 18 and 19 branching off from its lower and upper ends.
  • Central portion 17 is preferably housed in a corresponding recess formed on back wall 12 of the washing tank, while valve portions 18 and 19 extend within tank 6 on a downward slant and end in respective cylindrical portions 20, 21 of reduced section that constitute valve seats.
  • one of cylindrical portions 20, 21 is adapted to connect tightly in detachable fashion with the free end of connecting pipe 11.
  • this free end is provided with an elastic, preferably flared sleeve 22 adapted to permit the aforesaid detachable connection when basket 8 is inserted in its operating position within tank 6.
  • connecting pipe 11 is equipped with a rigid tapered pressure element 23 protruding outside sleeve 22.
  • This pressure element has, for example, a cruciform transverse section in such a way that it does not substantially obstruct the section of passage of pipe 11.
  • Valve portions 18, 19 house freely sliding ball obstructors 24, 25 which by gravity are normally adapted to be placed in correspondence with cylindrical portions 20, 21, which are therefore blocked when they are disconnected from connecting pipe 11.
  • obstructor 25 is situated due to gravity in the closed position of respective valve portion 19 while valve portion 18 is coupled with connecting pipe 11, so that obstructor 24 is moved by pres sure element 23 into the open position.
  • box collector 13 is shaped in correspondence with each valve portion 18, 19 as illustrated in Fig. 4.
  • Fig. 4 shows valve portion 18 shaped in its back and upper part with a lateral recess 26 adapted to contain ball obstructor 24 when the latter is moved into the open position by pressure element 23.
  • the positioning of ball 24 in the lateral recess is ensured by an inside projection 27 preferably shaped on an inclined plane and formed integrally on the back wall of valve seat 18.
  • projection 27 induces the ball to move laterally as well, being placed in lateral recess 26.
  • Upper valve portion 19 is identical to lower valve portion 18 illustrated in Fig. 4, the sole difference being that valve portion 18 is also provided laterally, as already mentioned, with a feed hole 28 coupled tightly with horizontal portion 16 of the water supply pipe and disposed upstream of obstructor 24 when the latter is in the aforesaid closed position.
  • connecting pipe 11 When upper basket 8 is disposed in the lower position of Fig. 1, connecting pipe 11 is coupled with valve portion 18 of box collector 13, whose obstructor 24 is moved by pressure element 23 into the open position shown in Figs. 2 and 4.
  • upper arm 10 can be supplied with water via supply pipe 14, 16, open valve portion 18 of box collector 13 and connecting pipe 11.
  • Valve portion 19 is closed by gravity by corresponding obstructor 25 and maintained in this position by the pressure of the water within collector 13 when the dishwasher is in operation.
  • arm 10 rotates on a plane passing below box collector 13, which thus does not interfere with arm 10 although the latter has the maximum length permitted by the dimensions of tank 6.
  • the hydraulic circuit supplying arm 10 advantageously has low head losses and low noise, since the path of the water conducted from portion 16 of the supply pipe axially to connecting pipe 11 undergoes only one deviation of approximately 90° in correspondence with box collector 13.
  • baskets 7, 8 and/or corresponding arms 9, 10 may be inclined instead of horizontal.
  • upper basket 8 may be adjustable in more than two different vertical positions; in this case collector 13 may be provided with a corresponding number of valve portions analogous to those 18 and 19 already described.
  • the hydraulic circuit of the inventive dishwasher may be further simplified in accordance with the variant shown in Figs. 5 and 6.
  • upper portion 19 of collector 13 does not house any obstructor 25 and may also extend horizontally as in Fig. 5.
  • lower valve portion 18 of collector 13 comprises in its interior a valve seat 29 against which ball obstructor 24 is adapted to hit, as it hits against cylindrical portion 20 in the opposite position, correspondingly closing valve portion 18.
  • Valve seat 29 is expediently disposed at the back in valve portion 18 adjacent central portion 17, while feed hole 28 of collector 13 is formed in the same valve portion 18 between cylindrical portion 20 and valve seat 29, that is, in a zone situated between the two operating positions of ball 24. Departing from the solution illustrated in Figs. 2, 3 and 4, valve seat 29 is preferably cylindrical.
  • ball obstructor 24 is normally disposed by gravity in a position (shown by the broken lines in Figs. 5 and 6) closing cylindrical portion 20 of collector 13.
  • pressure element 23 (of expedient dimensions) moves ball 24 toward valve seat 29, against which it is pressed by hydraulic pressure when the machine is in operation; this position of obstructor 24 is shown by continuous lines in Figs. 5 and 6.
  • associated arm 10 may rotate on a plane passing between protruding valve portions 18 and 19 which, in this case as well, do not interfere with arm 10 although the latter has the maximum length permitted by the dimensions of tank 6.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP90110645A 1989-06-06 1990-06-05 A dishwasher having a removable, vertically adjustable basket Expired - Lifetime EP0401767B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90110645T ATE99521T1 (de) 1989-06-06 1990-06-05 Geschirrspueler mit herausnehmbarem und vertikal versetzbarem geschirrkorb.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4573989 1989-06-06
IT8945739A IT1234696B (it) 1989-06-06 1989-06-06 Lavastoviglie con cesto estraibile regolabile in altezza.

Publications (2)

Publication Number Publication Date
EP0401767A1 EP0401767A1 (en) 1990-12-12
EP0401767B1 true EP0401767B1 (en) 1994-01-05

Family

ID=11257952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110645A Expired - Lifetime EP0401767B1 (en) 1989-06-06 1990-06-05 A dishwasher having a removable, vertically adjustable basket

Country Status (5)

Country Link
EP (1) EP0401767B1 (it)
AT (1) ATE99521T1 (it)
DE (1) DE69005705T2 (it)
ES (1) ES2048896T3 (it)
IT (1) IT1234696B (it)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137227C2 (de) * 1991-11-13 1999-12-16 Aeg Hausgeraete Gmbh Haushalt-Geschirrspülmaschine mit höhenverstellbarem Oberkorb
IT1282096B1 (it) * 1996-01-29 1998-03-12 Smeg Spa Dispositivo di collegamento idraulico per cestello di lavastoviglie posizionabile a due altezze diverse
DE19611054A1 (de) * 1996-03-20 1997-09-25 Bosch Siemens Hausgeraete Geschirrspülmaschine
ES2231876T3 (es) * 1996-07-17 2005-05-16 Arcelik A.S. Acoplamiento hidraulico amovible o valvula distribuidora de caudal para usar en un lavavajillas domestico.
IT1284791B1 (it) * 1996-09-11 1998-05-21 Merloni Elettrodomestici Spa Macchina lavastoviglie a circuito idraulico migliorato.
DE19705548B4 (de) * 1997-02-14 2005-04-14 Miele & Cie. Kg Geschirrspülmaschine mit einem höhenverstellbaren Geschirrkorb mit eigenem Sprüharm und einer Spülwasser-Zuleitung
IT1289970B1 (it) * 1997-02-25 1998-10-19 Smeg Spa Dispositivo di collegamento idraulico per cestello di lavastoviglie posizionabile a due altezze diverse
IT1290112B1 (it) * 1997-03-18 1998-10-19 Smeg Spa Dispositivo di cellegamento idraulico per cestello di lavastoviglie posizionabile a due altezze diverse
IT1305652B1 (it) * 1998-01-13 2001-05-15 Electrolux Zanussi Elettrodome Lavastoviglie con dispositivi di spruzzatura azionabiliselettivamente
US6431188B1 (en) 2000-04-03 2002-08-13 Whirlpool Corporation Dishwasher spray arm feed system
ATE472290T1 (de) † 2000-05-15 2010-07-15 Arcelik As Geschirrkorb mit höhenverstellbaren haltern
DE10155903A1 (de) * 2001-11-14 2003-05-15 Aeg Hausgeraete Gmbh Geschirrspülmaschine
US7055537B2 (en) 2002-06-27 2006-06-06 Maytag Corporation Bullet ended wash tube for dishwasher
KR101213800B1 (ko) 2005-07-29 2012-12-18 엘지전자 주식회사 식기 세척기
SE531346C2 (sv) * 2007-07-09 2009-03-03 Asko Cylinda Ab Diskmaskin försedd med en kopplingsanordning för koppling mellan ett spolvätskerör och en spolarm i ett spolsystem
US8166983B2 (en) 2007-12-21 2012-05-01 Wolf Appliance, Inc. Fluid supply system for appliance
CN101917893B (zh) * 2007-12-31 2013-08-14 阿塞里克股份有限公司 洗碗机
US9480389B2 (en) 2013-06-24 2016-11-01 Wolf Appliance, Inc. Connector for a dishwasher middle spray arm
EP3040012B1 (en) 2014-12-31 2018-12-12 Whirlpool EMEA S.p.A Dishwashing machine
EP3040010B1 (en) 2014-12-31 2017-08-02 Whirlpool EMEA S.p.A Household dish-washing machine
EP3040011B1 (en) 2014-12-31 2019-07-24 Whirlpool EMEA S.p.A Household dish-washing machine
US10631708B2 (en) * 2018-09-14 2020-04-28 Midea Group Co., Ltd. Dishwasher with docking arrangement for elevation-adjustable rack
WO2020202230A1 (en) * 2019-04-02 2020-10-08 Aristarco Andrea Dishwasher

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1050958B (it) * 1975-09-24 1981-03-20 Zanussi A Spa Industrie Perfezionamenti nelle macchine lava stoviglie
DE2732540C2 (de) * 1977-07-19 1983-01-05 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart In zwei verschiedenen Höhenlagen in den Spülbehälter einer Geschirrspülmaschine einsetzbarer Geschirrkorb mit einem Sprüharm
DE2732665C2 (de) * 1977-07-20 1983-01-05 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart In verschiedenen Höhenlagen in den Spülbehälter einer Geschirrspülmaschine einsetzbarer Geschirrkorb mit einem Sprüharm
SE444884B (sv) * 1980-03-11 1986-05-20 Electrolux Ab Hushallsdiskmaskin
SE442703B (sv) * 1981-11-24 1986-01-27 Electrolux Ab Kopplingsanordning for ett i en diskmaskin anordnat spolsystem
DE3732453A1 (de) * 1987-09-25 1989-04-20 Bosch Siemens Hausgeraete Sprueharmlagerung und wasserzufuehrung bei geschirrspuelmaschinen

Also Published As

Publication number Publication date
EP0401767A1 (en) 1990-12-12
DE69005705D1 (de) 1994-02-17
ATE99521T1 (de) 1994-01-15
IT1234696B (it) 1992-05-26
DE69005705T2 (de) 1994-04-28
ES2048896T3 (es) 1994-04-01
IT8945739A0 (it) 1989-06-06

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