US20130255734A1 - Spray arm for a dishwasher with two spray arm parts - Google Patents

Spray arm for a dishwasher with two spray arm parts Download PDF

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Publication number
US20130255734A1
US20130255734A1 US13/854,277 US201313854277A US2013255734A1 US 20130255734 A1 US20130255734 A1 US 20130255734A1 US 201313854277 A US201313854277 A US 201313854277A US 2013255734 A1 US2013255734 A1 US 2013255734A1
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US
United States
Prior art keywords
spray arm
groove
wall
arm part
designed
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
US13/854,277
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English (en)
Inventor
Heinz Hermann
Marc Vogt
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.)
Etimex Technical Components GmbH
Original Assignee
Etimex Technical Components GmbH
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 Etimex Technical Components GmbH filed Critical Etimex Technical Components GmbH
Priority to US13/854,277 priority Critical patent/US20130255734A1/en
Assigned to ETIMEX TECHNICAL COMPONENTS GMBH reassignment ETIMEX TECHNICAL COMPONENTS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HERMANN, HEINZ
Assigned to ETIMEX TECHNICAL COMPONENTS GMBH reassignment ETIMEX TECHNICAL COMPONENTS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HERMANN, HEINZ, VOGT, MARC
Publication of US20130255734A1 publication Critical patent/US20130255734A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • A47L15/4278—Nozzles

Definitions

  • the invention relates to a spray arm for a dishwasher, comprising a first spray arm part and a second spray arm part, of which the first spray arm part comprises a groove which extends substantially along the circumference of the first spray arm part.
  • rotating spray arms are provided for supplying and distributing washing water in an associated washing compartment.
  • the spray arms are usually assembled using two spray arm parts which enclose a cavity.
  • the washing water is introduced into the cavity and is thereafter sprayed into the washing compartment of the dishwasher by means of nozzles, the nozzles being located on at least one of the spray arm parts.
  • the object underlying the invention is to provide a dishwasher with a spray arm, of which the spray arm parts may be manufactured and assembled in a particularly cost-effective way, but at the same time meet the requirements in respect of leaktightness over the service life.
  • a spray arm for a dishwasher comprising a first spray arm part and a second spray arm part, of which the first spray arm part comprises a groove which extends substantially along the circumference of the first spray arm part, said groove being formed by a first, inner groove wall and a second, outer groove wall, and of which the second spray arm part comprises a web wall which extends substantially along the circumference of the second spray arm part and engages with the groove, the web wall comprising a first latching element which, in order to establish a latching connection between the first and the second spray arm part, is designed to interact with a second latching element which is located on one of the groove walls.
  • the solution according to the invention provides a cavity which can be manufactured cost-effectively and is sealed toward the outside and conducts fluid.
  • the cavity herein is already sealed without any additional measures upon connection of the two spray arm parts to one another. No separate production step is required in order to seal the components joined with one another.
  • the sealing is ensured only by the groove and the web wall inserted into it, with the components at the same time being permanently coupled to one another by means of the latching connection provided.
  • the inner groove wall serves as an additional support for the web wall and in this way increases the strength of the connection.
  • the structure of the groove provided by the invention creates double side walls in the spray device. This is advantageous with a view to torsional stiffness and the stability of the assembled spray arm.
  • the double design of the wall is implemented at the points exhibiting the greatest stress, shearing forces and pressure impulses and at the same time the lowest bending strength.
  • the solution according to the invention does not necessitate any separate process steps for sealing or joining, as in, for instance, paddle welding, vibration welding or overmolding of conventional spray arm parts. Additionally, the risk of leaks or distortion as indeed occurs in conventional manufacturing methods for spray arms is avoided. As a result, according to the invention, the requirements in terms of technical equipment for the manufacture and assembly, and the associated investment costs, are reduced. Moreover, the solution according to the invention can be very well integrated into any automated manufacturing process with short cycle times, in particular with a view to a short-cycle injection molding process for the manufacture of the respective spray arm parts.
  • a spray arm may be manufactured which also satisfies high esthetic requirements, as exist today for a spray arm, this being a visible part of a dishwasher.
  • the first latching element is embodied on the outside of the web wall and the second latching element is embodied on the second, outer groove wall.
  • the latching connection of this kind is located, hidden from the viewer from the outside, between the outer groove wall and the web wall. Indeed, in this solution no latch cams, as may be conventionally known from other applications, are identifiable. Because such latch cams should not be visible, such latch cams have hitherto been used only on, for instance, spray arms of the so-called third spray level, where the spray arm is located very close to the ceiling of the washing compartment. There, not only is the visibility of the spray arm is limited, but there is also no requirement for a high level of leaktightness.
  • the second, outer groove wall is designed to be higher than the first, inner groove wall.
  • the outer groove wall extends particularly far beyond the web wall, with sufficient space for the location of a latching connection thus being available below.
  • the groove walls of different height permit the web wall to be inserted into the groove in a stepped manner, said web wall being first aligned along the outer groove wall and only then being inserted into the rear or deeper section of the groove for the purpose of sealing by means of the inner groove wall.
  • This stepped insertion into the groove is particularly advantageous with a view to an automated assembly and the leaktightness of the functional group thus achievable.
  • the first, inner groove wall is preferably also designed with an insertion chamfer on its rim facing the web wall for insertion of the web wall into the groove
  • the second, outer groove wall is preferably also designed with an insertion chamfer on its rim facing the web wall for insertion of the web wall into the groove
  • the web wall is preferably also designed with an insertion chamfer on at least one of its rims facing the groove walls for insertion of the web wall into the groove.
  • the first latching element is preferably designed as a detent lug and the second latching element as a detent recess.
  • a latching geometry of this kind a high strength of the latching connection may be achieved with a comparatively narrow latching width.
  • the first latching element and the second latching element are furthermore preferably designed to extend substantially along the entire circumference of the first and the second spray arm part.
  • the surrounding latching may herein be advantageously combined on at least one of the spray arm parts with a surrounding sealing lip, which in the latching process with its counterpart is compressed and deformed along the entire circumference. Such a sealing lip is, however, not mandatory.
  • the surrounding latching according to the invention especially additionally forms a labyrinth which significantly contributes to the mutual sealing of the two spray arm parts.
  • the solution according to the invention thus achieves an optimum balance between joining force and deformation and leaktightness.
  • the particular embodiment of the latching geometry according to the invention additionally contributes toward leaktightness being ensured along the entire circumference of the two spray arm parts.
  • first latching element and the second latching element are designed with an interruption by a short gap at predetermined spacings along the circumference of the first and the second spray arm part.
  • Such interruptions of the latching elements advantageously extend over a gap of 0.5 cm to 1.5 cm, particularly preferably approx. 1.0 cm, and are of advantage in particular with a view to the shaping of the injection molds used for the spray arm parts.
  • the solution according to the invention is also outstandingly suited to providing at least one channel leading from the outside into the groove for accommodating a mass connecting the first spray arm part with the second spray arm part.
  • the mass introduced into the channel may ensure an additional means of sealing and a cohesive connection of the two spray arm parts, if so desired.
  • FIG. 1 shows a first perspective view of a first spray arm according to the invention with its two spray arm parts prior to assembly.
  • FIG. 2 shows a second perspective view of the spray arm parts shown in FIG. 1 .
  • FIG. 3 shows a perspective view of the spray arm parts shown in FIG. 1 after assembly to form the complete spray arm.
  • FIG. 4 shows the cross section IV-IV in FIG. 1 .
  • FIG. 5 shows the cross section V-V in FIG. 3 .
  • FIG. 6 shows the detail VI in FIG. 5 .
  • FIG. 7 shows the view shown in FIG. 5 for a variant of a spray arm according to the invention.
  • FIG. 8 shows a perspective view of a second spray arm according to the invention with its two spray arm parts prior to assembly.
  • FIG. 9 shows a perspective view of the spray arm parts shown in FIG. 8 after assembly to form the complete spray arm.
  • FIG. 10 shows a perspective view of a third spray arm according to the invention with its two spray arms prior to assembly.
  • the figures show a spray arm 10 of a domestic dishwasher which is not illustrated, comprising a vertical hollow-cylindrical hub section 12 , with two arm sections 14 and 16 extending horizontally therefrom in opposite directions.
  • the spray arm 10 is supplied through the hub section 12 with water under pressure, which water then sprays out through the nozzles 18 which are arranged distributed on the spray arm 10 .
  • the nozzles 18 are distributed on the upper side 19 of an upper, shell-shaped spray arm part 20 and, if appropriate, also on the lower side 22 of a lower, also shell-shaped spray arm part 24 .
  • the spray arm parts 20 and 24 herein are made of plastic by means of injection molding or alternatively of metal, in particular of stainless steel, by means of deep-drawing, and are each placed against one another by way of their shell shape such that a cavity 26 is created.
  • a groove 28 which extends substantially along its circumference is embodied on the upper spray arm part 20 , said groove being formed by a first, inner groove wall 30 and a second, outer groove wall 32 .
  • a web wall 34 which also extends substantially along its entire circumference and engages with the groove 28 is embodied on the lower spray arm part 24 .
  • the web wall 34 is, at its top, designed to be so high that it is sealed against the upper spray arm part 20 right up to the base of the groove 28 and there in a first, upper seal region 36 (refer to FIG. 6 ) by pressing in a force-fitting manner.
  • the groove 28 is designed to be so narrow that the web wall 34 , when inserted into the groove 28 , is laterally forced against the inner groove wall 30 , where it is also sealed in a second lateral seal region 38 (refer again to FIG. 6 ) against the upper spray arm part 20 .
  • the web wall 34 is designed to be so high and/or wide that it lies against the walls of the groove 28 without any major contact pressure. In this instance, sealing between the upper spray arm part 20 and the lower spray arm part 24 is essentially achieved solely as a result of the labyrinth-type geometry of groove 28 and web wall 34 .
  • a latching connection 40 is further achieved between the upper spray arm part 20 and the lower spray arm part 24 , by means of which connection the two parts are coupled to one another in a form-fitting manner.
  • the form-fitting coupling is made without a separate production step when joining the spray arm part 20 and the spray arm part 24 during assembly of the spray arm 10 .
  • the web wall 34 on the lower spray arm part 24 comprises a first latching element 41 on its outside which interacts with a second latching element on the inside of the outer groove wall 32 .
  • the latching connection 40 of this kind is not visible to anyone viewing the spray arm 10 from the outside.
  • the first latching element 41 is designed as a detent lug and the second latching element 42 as a detent recess, both extending substantially along the entire circumference of the first and the second spray arm part 20 or 24 , respectively, and only being interrupted by a short gap 44 at predetermined spacings along the circumference.
  • the second, outer groove wall 32 is designed to be higher than the first, inner groove wall 30 and extends far beyond the web wall 34 when the lower spray arm part 24 is brought together with the upper spray arm part 20 .
  • the first, inner groove wall 30 is designed with an insertion chamfer 46 on its rim facing the web wall 34 for insertion of the web wall 34 into the groove 28
  • the second, outer groove wall 32 is designed with an insertion chamfer 48 on its rim facing the web wall 34 also for insertion of the web wall 34 into the groove 28
  • the web wall 34 itself is designed with an insertion chamfer 50 and 52 on each of its two rims facing the groove walls 30 and 32 .
  • FIG. 7 shows a variant of a spray arm 10 in which a plurality of channels 54 for accommodating a mass connecting the first spray arm part 20 with the second spray arm part 24 are distributed along the circumference on the upper rim region of the upper spray arm part 20 .
  • the mass may be introduced into the channels 54 during the assembly process, in particular in order to be distributed within the groove 28 above the web wall 34 , for additional sealing and for cohesive connection of the two spray arm parts 20 and 24 .
  • FIGS. 8 and 9 show a spray arm 10 , of which the spray arm part 20 is also designed with a groove 28 , an inner groove wall 30 and an outer groove wall 32 .
  • a substantially vertical slot 56 is formed in the outer groove wall 32 approximately in the center of each arm section 14 and 16 .
  • the slot 56 extends substantially along the entire height of the groove wall 32 and is open toward the outside and/or accessible from outside.
  • a fin 58 is inserted in the slot 56 of this kind in a form-fitting manner when the two spray arm parts 20 and 24 are joined, said fin 58 being embodied at a corresponding position on the exterior of the web wall 34 of the lower spray arm part 24 .
  • the fins 58 of this kind serve as stiffening elements and in particular prevent any distortion of the spray arm 10 when water passes through it in the operational state and thus sets it in rotational motion.
  • FIG. 10 shows a spray arm 10 in which, in a functionally similar manner, vertical slots 56 are embodied on the inner groove wall 30 and fins 58 are embodied on the inner side of the web wall 34 .
  • This arrangement of the slots 56 and the form-fitting ribs 58 results in a stiffening effect which is not visible from outside.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
US13/854,277 2012-03-30 2013-04-01 Spray arm for a dishwasher with two spray arm parts Abandoned US20130255734A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/854,277 US20130255734A1 (en) 2012-03-30 2013-04-01 Spray arm for a dishwasher with two spray arm parts

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012006379A DE102012006379A1 (de) 2012-03-30 2012-03-30 Sprüharm für einen Geschirrspüler mit zwei Sprüharmteilen
DE102012006379.2 2012-03-30
US201261739306P 2012-12-19 2012-12-19
US13/854,277 US20130255734A1 (en) 2012-03-30 2013-04-01 Spray arm for a dishwasher with two spray arm parts

Publications (1)

Publication Number Publication Date
US20130255734A1 true US20130255734A1 (en) 2013-10-03

Family

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US13/854,277 Abandoned US20130255734A1 (en) 2012-03-30 2013-04-01 Spray arm for a dishwasher with two spray arm parts

Country Status (7)

Country Link
US (1) US20130255734A1 (de)
EP (1) EP2830475B1 (de)
CN (1) CN104302222B (de)
DE (1) DE102012006379A1 (de)
ES (1) ES2688870T3 (de)
PL (1) PL2830475T3 (de)
WO (1) WO2013143516A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170354310A1 (en) * 2016-06-08 2017-12-14 Samsung Electronics Co., Ltd. Dishwasher
GB2552397A (en) * 2016-12-15 2018-01-24 Matthew Russell Iain Dishwasher spray arms
CN110013205A (zh) * 2019-02-22 2019-07-16 宁波欧琳厨具有限公司 一种拼接式喷淋臂及洗碗机
WO2020136256A1 (en) * 2018-12-27 2020-07-02 Arcelik Anonim Sirketi A dishwasher
USD900417S1 (en) * 2013-10-29 2020-10-27 Whirlpool Corporation Sprayer for dish washing machine
WO2020171788A3 (en) * 2019-02-21 2021-05-27 Serdar Plasti̇k Sanayi Ve Ti̇caret Anoni̇m Şi̇rketi̇ Rotating injection propeller with 2k-seal.
USD967571S1 (en) * 2020-12-17 2022-10-18 Midea Group Co., Ltd. Spray arm for dishwasher

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103908205A (zh) * 2014-04-17 2014-07-09 芜湖美的洗涤电器制造有限公司 一种洗碗机喷臂
DE102014225379A1 (de) * 2014-12-10 2016-06-16 Robert Bosch Gmbh Elektrische Maschine, insbesondere Startermotor
KR102641369B1 (ko) * 2018-12-12 2024-02-28 삼성전자주식회사 식기세척기
CN112963535B (zh) * 2021-02-02 2021-12-14 北京红岸水滴科技发展有限公司 一种带有转动密封结构的洗臂
CN114668358A (zh) * 2022-05-05 2022-06-28 珠海格力电器股份有限公司 喷臂及洗碗机

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US3444870A (en) * 1966-12-12 1969-05-20 Whirlpool Co Article washing apparatus
US5706983A (en) * 1995-08-18 1998-01-13 Calmar Inc. Trigger sprayer having a nozzle cover
US20070289615A1 (en) * 2006-06-19 2007-12-20 Lg Electronics Inc. Washing arm and dishwasher having the same
US20080196749A1 (en) * 2004-09-01 2008-08-21 Kyung Lae Kim Dishwasher and Manufacturing Method of the Same
US20080271759A1 (en) * 2007-05-04 2008-11-06 Electrolux Home Products, Inc. Spray arm for a dishwasher, and associated method
US20130206179A1 (en) * 2012-02-14 2013-08-15 Hollingsworth & Vose Company Warewash machine with removal rotating arm and related method

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US4172463A (en) * 1978-10-13 1979-10-30 White Consolidated Industries, Inc. Dishwasher upper spray and deflector disc
DE4428434A1 (de) * 1994-08-11 1996-02-15 Boehringer Ingelheim Kg Verschlußkappe und Verfahren zur gasblasenfreien Füllung von Behältern
JP2000157478A (ja) * 1998-11-30 2000-06-13 Hoshizaki Electric Co Ltd 食器洗浄機のノズル構造
CN201234966Y (zh) * 2008-07-15 2009-05-13 美的集团有限公司 一种洗碗机的喷水组件
CN102362804A (zh) * 2008-12-12 2012-02-29 陆丰科 一种横卧台式洗碗机
CN101919680A (zh) * 2009-06-16 2010-12-22 周俊 一种改良的洗碗机用分配器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444870A (en) * 1966-12-12 1969-05-20 Whirlpool Co Article washing apparatus
US5706983A (en) * 1995-08-18 1998-01-13 Calmar Inc. Trigger sprayer having a nozzle cover
US5706983B1 (en) * 1995-08-18 1999-08-24 Calmar Inc Trigger sprayer having a nozzle cover
US20080196749A1 (en) * 2004-09-01 2008-08-21 Kyung Lae Kim Dishwasher and Manufacturing Method of the Same
US20070289615A1 (en) * 2006-06-19 2007-12-20 Lg Electronics Inc. Washing arm and dishwasher having the same
US20080271759A1 (en) * 2007-05-04 2008-11-06 Electrolux Home Products, Inc. Spray arm for a dishwasher, and associated method
US20130206179A1 (en) * 2012-02-14 2013-08-15 Hollingsworth & Vose Company Warewash machine with removal rotating arm and related method

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD927101S1 (en) 2013-10-29 2021-08-03 Whirlpool Corporation Sprayer for dish washing machine
USD955671S1 (en) 2013-10-29 2022-06-21 Whirlpool Corporation Sprayer for dish washing machine
USD900417S1 (en) * 2013-10-29 2020-10-27 Whirlpool Corporation Sprayer for dish washing machine
US10939797B2 (en) * 2016-06-08 2021-03-09 Samsung Electronics Co., Ltd. Dishwasher
KR102640867B1 (ko) * 2016-06-08 2024-02-27 삼성전자주식회사 식기세척기
KR20170138791A (ko) * 2016-06-08 2017-12-18 삼성전자주식회사 식기세척기
US20170354310A1 (en) * 2016-06-08 2017-12-14 Samsung Electronics Co., Ltd. Dishwasher
GB2552397A (en) * 2016-12-15 2018-01-24 Matthew Russell Iain Dishwasher spray arms
GB2552397B (en) * 2016-12-15 2018-10-10 Matthew Russell Iain Dishwasher spray arms
WO2020136256A1 (en) * 2018-12-27 2020-07-02 Arcelik Anonim Sirketi A dishwasher
US20220133123A1 (en) * 2019-02-21 2022-05-05 Serdar Plastik Sanayi Ve Ticaret Anonim Sirketi Rotating injection propeller with 2k-seal.
WO2020171788A3 (en) * 2019-02-21 2021-05-27 Serdar Plasti̇k Sanayi Ve Ti̇caret Anoni̇m Şi̇rketi̇ Rotating injection propeller with 2k-seal.
EP3927221A4 (de) * 2019-02-21 2022-11-30 Serdar Plastik Sanayi Ve Ticaret Anonim Sirketi Rotierender einspritzpropeller mit 2k-dichtung
CN110013205A (zh) * 2019-02-22 2019-07-16 宁波欧琳厨具有限公司 一种拼接式喷淋臂及洗碗机
USD967571S1 (en) * 2020-12-17 2022-10-18 Midea Group Co., Ltd. Spray arm for dishwasher

Also Published As

Publication number Publication date
PL2830475T3 (pl) 2019-03-29
WO2013143516A1 (de) 2013-10-03
CN104302222B (zh) 2017-07-28
EP2830475A1 (de) 2015-02-04
CN104302222A (zh) 2015-01-21
ES2688870T3 (es) 2018-11-07
EP2830475B1 (de) 2018-07-04
DE102012006379A1 (de) 2013-10-02

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Owner name: ETIMEX TECHNICAL COMPONENTS GMBH, GERMANY

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Effective date: 20130328

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Owner name: ETIMEX TECHNICAL COMPONENTS GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HERMANN, HEINZ;VOGT, MARC;REEL/FRAME:030226/0263

Effective date: 20130328

STCB Information on status: application discontinuation

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