US3434671A - Pump for dishwasher - Google Patents

Pump for dishwasher Download PDF

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Publication number
US3434671A
US3434671A US520388A US3434671DA US3434671A US 3434671 A US3434671 A US 3434671A US 520388 A US520388 A US 520388A US 3434671D A US3434671D A US 3434671DA US 3434671 A US3434671 A US 3434671A
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US
United States
Prior art keywords
pump
blade
dishwasher
openings
chamber
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
US520388A
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English (en)
Inventor
Donald S Cushing
Thomas E Jenkins
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.)
General Electric Co
Original Assignee
General Electric Co
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3434671A publication Critical patent/US3434671A/en
Anticipated expiration legal-status Critical
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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
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • A47L15/4227—Arrangements or adaption of recirculation or discharge pumps with macerator arrangements for chopping entrained food particles

Definitions

  • a rotary pump for circulating wash fluid through a dishwasher wherein the pump is provided with macerating means which allow the pump to handle food soil and other foreign articles entrained in the wash fluid.
  • the macerating means comprise a single blade pivotally secured on a short transverse projection provided on the pumps rotatable shaft closely upstream of a grid-likearticle grading element located across the pump inlet. Entrained articles larger than the element openings are stopped by the element.
  • This invention relates generally to a pump for moving wash fluid through a dishwasher and, more specifically, to a pump which can adequately handle food soil and other foreign articles entrained in the liquid being pumped.
  • Dishes to be washed in an automatic dishwasher are often placed into the dishwasher with food particles adhering thereto.
  • These food particles may include such things as kernels of corn, peas and watermelon seeds.
  • an automatic dishwasher having a housing defining an inlet.
  • a grading member including a grid-like element is disposed in the inlet and rotatable means extend through the grid-like element.
  • the rotatable means has a short transverse projection thereon upstream of the grid-like element.
  • a blade is pivotally secured to the projection for normal orbital movement about the axis of the rotating means as the means rotate.
  • FIGURE 1 is an elevational view, partly cut away to show details, of a dishwasher employing the present invention
  • FIGURE 2 is a partial sectional view taken along line 2-2 of FIGURE 1;
  • FIGURE 3 is a fragmentary sectional view of the invention shown in FIGURE 2.
  • FIGURE 4 is a view similar to FIGURE 2 but showing an article blocking the macerating blade.
  • an automatic dishwasher 10 having an outer cabinet 11 defining therein a wash chamber 12. Disposed within wash chamber 12 are dish supporting racks 13 and 14 which are adapted to receive and support dishes or other articles to be Washed Within Wash chamber 12.
  • a closure member 15 is provided in one' Wall of cabinet 11, pivotal about a tinge means 16, to provide access to wash chamber 12.
  • rack 13 can be at least partially withdrawn from wash chamber 12 by means of a slide and roller system 17 provided at each side of rack 13 and slidably supporting rack 13 from the inner wall of cabinet 11.
  • rack 14 can be at least partially withdrawn from wash chamber 12 by means of a roller 18 which rides upon a surface 19 provided at each side of cabinet 11.
  • wash chamber 12 The lower extremity of wash chamber 12 is defined by a bottom wall 20 which gradually slopes to :a low point 21 at one side of the dishwasher. Disposed below low point 21 is a sump 22 which may be formed integrally with bottom wall 20 or which may be a separate element secured to bottom wall 20. Projecting upwardly from bottom wall 20 near the center of Wash chamber 12 is a pedestal 23 which rotatably supports a reaction type spray device 24. Spray device 24 has a plurality of orifices 25 through which wash fluid is ejected to effectuate a wash action upon articles supported by racks 13 and 14. At least one of the orifices 25 is directed such that the reaction force created by the wash fluid passing: therethrough causes rotation of spray device 24.
  • Wash fluid is propelled into spray device 24 by a motorpump assembly 26 including an electric motor 27 and a pump 28.
  • a flexible boot or conduit 29 interconnects sump 22 with the inlet of pump 28.
  • Boot 29 is secured to sump 22 by means of a clamp 30 and is secured to pump 28 similarly by means of a clamp 31.
  • Motor-pump assembly 26 is suitably supported from bottom wall 20.
  • An electrically-operated solenoid 32 operates a valve (not shown) within the housing of pump 28 to selectivity direct the fluid pumped by pump 28 either up through spray device 24 or out through an efiluent discharge conduit 33. It is to be understood that a sequence control means (not shown) is provided to energize motor 27 and a solenoid 32 at the appropriate times to effectuate a complete dishwasher cycle which may include several rinses, washes and a drying period during which an electrical resistance heating element 33a is energized.
  • pump 28 has a housing defining an inlet within which is disposed a grading member 34 which includes a gridlike element 35 through which fluid entering pump 28 must pass.
  • Grading member 34 is provided with an exter nal screw thread 36 which cooperates with an internal screw thread 37 on the housing of pump 28.
  • An annular member 38 is adapted to rest upon a shoulder formed on the housing of pump 28 as grading member 34 is screwed into the pumping housing.
  • a sealing member 39 is clamped between member 38 and member 34 to provide a seal between pump impeller 40 and the housing of pump 28.
  • a suitable sealing member is described and claimed in our U.S. application Ser. No. 510,505, filed November 30, 1965, now Patent No. 3,381,620, and assigned to the General Electric Company, assignee of the present invention. As will become evident as this description proceeds, the exact sealing member 39 employed is not critical to, and does not constitute a part of, the present invention.
  • Impeller 40 is supported by a shaft 41 and rotates therewith about an axis that is generally aligned with that of the housing inlet to pump fluid through pump 28.
  • the end of shaft 41 is provided with internal screw threads which are adapted to receive, and cooperate with, K
  • member 42 has a short transverse projection 43 which receives a pin 44.
  • Pin 44 pivotally supports a blade 45 by means of a slot 46 through which pin 44 passes.
  • the leading edge of blade 45 is chamfered, or sloped rearwardly, as best seen in FIGURE 2, to minimize jamming of the blade as it encounters an obstruction as well as to reduce hydraulic losses. In other words, if the blade were not chamfered, it would present a large area to the fluid passing through pump 28 and would therefore create a greater restriction against flow.
  • the grid-like element 35 defines a plurality of hexagonal openings through which the fluid passes.
  • grading member 34 further includes a group of substantially square openings peripherally spaced about the hexagonal openings defined by grid-like element 35. All fluid passing through pump 28 must pass through either the hexagonal openings or the substantially square openings. The size of these openings are related to the size of orifices 25 in spray device 24 so that any particle passing through an opening into pump 28 will be assured of passing through any of the orifices 25 without clogging or blocking the orifices.
  • blade 45 which rotates continuously with pump 28 and motor 27 in close spaced relationship to grading member 34, will macerate the article until it is small enough to pass through an opening whereupon it will pass through pump 28 and up through spray device 24. If the article is not macerable, but partially enters one of the openings and becomes lodged therein, the pivotal relationship between blade 45 and projection 43 will allow shaft 41 and projection 43 to rotate, without damage to either, while blade 45 rides against the obstruction in a reciprocating manner as shown in FIGURE 4.
  • blade 45 will bat the article around within boot 29.
  • means are provided to receive and collect such items as they are struck by blade 45.
  • This means includes a chamber 47 which is associated with boot 29 in alignment with the plane of rotation of the blade 45.
  • Chamber 47 may be formed integrally with boot 25! or it may be a separate piece suitably secured to boot 29.
  • Chamber 47 has an open end which is closed by means of a plug 48.
  • Plug 48 may be provided with screw threads to cooperate with threads provided in chamber 47 or, alternatively, plug 48 may be sized to provide an interference fit with the internal periphery of chamber 47.
  • the leading edge of blade 45 may sharpen the leading edge of blade 45; however, in the preferred embodiment of the present invention, the leading edge is not sharpened but a thin stainless steel material is used having an approximate thickness of .036 inch which presents an edge sufficiently fine to macerate most of the food particles which will find their way into the boot 29.
  • the blade is positioned upstream of pump impeller 40 and, therefore, the blade is located on the low pressure side of the pump. It has been found in practice that by positioning blade 45 on the low pressure side, only two to four watts of power is required to drive the blade but when the blade is positioned on the high pressure side of impeller 41, approximately twenty to forty watts of power is required to drive the blade. Accordingly, by positioning the blade on the lower pressure side of the impeller 40, significant power is conserved.
  • a pump for use with a dishwasher comprising:
  • the invention of claim 1 further comprising a conduit connected to said inlet and extending upstream therefrom, and a chamber supported by said conduit radially outward from said blade to collect unmacera-ble articles batted from said element by said blade.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Washing And Drying Of Tableware (AREA)
US520388A 1966-01-13 1966-01-13 Pump for dishwasher Expired - Lifetime US3434671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52038866A 1966-01-13 1966-01-13

Publications (1)

Publication Number Publication Date
US3434671A true US3434671A (en) 1969-03-25

Family

ID=24072392

Family Applications (1)

Application Number Title Priority Date Filing Date
US520388A Expired - Lifetime US3434671A (en) 1966-01-13 1966-01-13 Pump for dishwasher

Country Status (5)

Country Link
US (1) US3434671A (de)
CH (1) CH451426A (de)
FR (1) FR1508478A (de)
GB (1) GB1102489A (de)
NL (1) NL6700596A (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981456A (en) * 1975-10-31 1976-09-21 General Electric Company Food particle macerating means
JPS52139402U (de) * 1976-04-16 1977-10-22
US4201345A (en) * 1978-08-04 1980-05-06 General Electric Company Food cutter for dishwasher
US4228962A (en) * 1979-06-14 1980-10-21 Whirlpool Corporation Comminuting liquid swirler
US4319598A (en) * 1980-09-22 1982-03-16 Whirlpool Corporation Soil separator drain valve
US4319599A (en) * 1980-09-22 1982-03-16 Whirlpool Corporation Vertical soil separator for dishwasher
US4350306A (en) * 1980-09-22 1982-09-21 Whirlpool Corporation Chopper for dishwasher soil separator
US4392891A (en) * 1980-07-02 1983-07-12 Hobart Corporation Dishwasher soil collecting circuit
US4408724A (en) * 1981-04-17 1983-10-11 Meyer Charles R Pulverizer device for handling liquids containing solid and semi-solid materials
US4795102A (en) * 1987-12-04 1989-01-03 Maytag Corporation Dishwasher pump with particle cutter
US5184635A (en) * 1990-12-28 1993-02-09 Whirlpool Corporation Fluid handling system for a dishwasher
US5628334A (en) * 1995-04-25 1997-05-13 White Consolidated Industries, Inc. Dishwasher with food particle macerator and mincer
EP1057445A3 (de) * 1999-06-04 2002-04-17 Whirlpool Corporation Geschirrspülmaschine mit Vorrichtung zum Zerhakken von Nahrungspartikeln
WO2006003187A1 (de) * 2004-07-02 2006-01-12 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspühler mit zerkleinerungsvorrichtung
US20060174925A1 (en) * 2005-02-09 2006-08-10 Maytag Corp. Dishwasher drain pump assembly
US20120024768A1 (en) * 2010-07-28 2012-02-02 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular a dishwasher
US9451864B2 (en) 2011-04-29 2016-09-27 Electrolux Home Products Corporation N.V. Filter
CN109210020A (zh) * 2018-11-29 2019-01-15 深圳市鸿盈鸿科技有限公司 一种防汛抢险用水泵
CN111648969A (zh) * 2020-06-10 2020-09-11 湖北众堃科技股份有限公司 一种无堵塞固定式潜水排污泵

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1637376A (en) * 1927-08-02 Dishwashing machine
US1751611A (en) * 1926-10-02 1930-03-25 Jeffrey Mfg Co Pulverizing machine
US2105759A (en) * 1933-12-19 1938-01-18 Jeffrey Mfg Co Reducing apparatus
US2421064A (en) * 1944-10-09 1947-05-27 Frank T Hilliker Garbage disposal device
US2729219A (en) * 1952-02-19 1956-01-03 Gen Motors Corp Dishwashing machine
US2753121A (en) * 1953-09-10 1956-07-03 Elfenbein Wilfred Waste macerater
US2819847A (en) * 1956-10-15 1958-01-14 Gen Electric Waste disposal apparatus
US2828085A (en) * 1956-10-15 1958-03-25 Gen Electric Waste disposal apparatus
US2828086A (en) * 1956-10-15 1958-03-25 Gen Electric Pivotal mounting of hammer in waste disposal apparatus
US3051208A (en) * 1959-08-27 1962-08-28 Griffith Laboratories Blade assembly for comminuting machine
US3079094A (en) * 1961-05-05 1963-02-26 Gen Electric Comminuting means for liquid spraying system of dishwashers

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1637376A (en) * 1927-08-02 Dishwashing machine
US1751611A (en) * 1926-10-02 1930-03-25 Jeffrey Mfg Co Pulverizing machine
US2105759A (en) * 1933-12-19 1938-01-18 Jeffrey Mfg Co Reducing apparatus
US2421064A (en) * 1944-10-09 1947-05-27 Frank T Hilliker Garbage disposal device
US2729219A (en) * 1952-02-19 1956-01-03 Gen Motors Corp Dishwashing machine
US2753121A (en) * 1953-09-10 1956-07-03 Elfenbein Wilfred Waste macerater
US2819847A (en) * 1956-10-15 1958-01-14 Gen Electric Waste disposal apparatus
US2828085A (en) * 1956-10-15 1958-03-25 Gen Electric Waste disposal apparatus
US2828086A (en) * 1956-10-15 1958-03-25 Gen Electric Pivotal mounting of hammer in waste disposal apparatus
US3051208A (en) * 1959-08-27 1962-08-28 Griffith Laboratories Blade assembly for comminuting machine
US3079094A (en) * 1961-05-05 1963-02-26 Gen Electric Comminuting means for liquid spraying system of dishwashers

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981456A (en) * 1975-10-31 1976-09-21 General Electric Company Food particle macerating means
JPS52139402U (de) * 1976-04-16 1977-10-22
US4201345A (en) * 1978-08-04 1980-05-06 General Electric Company Food cutter for dishwasher
US4228962A (en) * 1979-06-14 1980-10-21 Whirlpool Corporation Comminuting liquid swirler
US4392891A (en) * 1980-07-02 1983-07-12 Hobart Corporation Dishwasher soil collecting circuit
US4319598A (en) * 1980-09-22 1982-03-16 Whirlpool Corporation Soil separator drain valve
US4319599A (en) * 1980-09-22 1982-03-16 Whirlpool Corporation Vertical soil separator for dishwasher
US4350306A (en) * 1980-09-22 1982-09-21 Whirlpool Corporation Chopper for dishwasher soil separator
US4408724A (en) * 1981-04-17 1983-10-11 Meyer Charles R Pulverizer device for handling liquids containing solid and semi-solid materials
US4795102A (en) * 1987-12-04 1989-01-03 Maytag Corporation Dishwasher pump with particle cutter
US5184635A (en) * 1990-12-28 1993-02-09 Whirlpool Corporation Fluid handling system for a dishwasher
US5628334A (en) * 1995-04-25 1997-05-13 White Consolidated Industries, Inc. Dishwasher with food particle macerator and mincer
EP1057445A3 (de) * 1999-06-04 2002-04-17 Whirlpool Corporation Geschirrspülmaschine mit Vorrichtung zum Zerhakken von Nahrungspartikeln
US6454872B1 (en) 1999-06-04 2002-09-24 Whirlpool Corporation Dishwasher with food particle chopping assembly
WO2006003187A1 (de) * 2004-07-02 2006-01-12 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspühler mit zerkleinerungsvorrichtung
AU2005259229B2 (en) * 2004-07-02 2011-02-10 Bsh Hausgerate Gmbh Dishwasher with comminution device
US20060174925A1 (en) * 2005-02-09 2006-08-10 Maytag Corp. Dishwasher drain pump assembly
US7472714B2 (en) 2005-02-09 2009-01-06 Maytag Corporation Dishwasher drain pump assembly
US20120024768A1 (en) * 2010-07-28 2012-02-02 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular a dishwasher
US8709242B2 (en) * 2010-07-28 2014-04-29 Bsh Bosch Und Siemens Hausgeraete Gmbh Water-conducting household appliance, in particular a dishwasher
US9451864B2 (en) 2011-04-29 2016-09-27 Electrolux Home Products Corporation N.V. Filter
CN109210020A (zh) * 2018-11-29 2019-01-15 深圳市鸿盈鸿科技有限公司 一种防汛抢险用水泵
CN111648969A (zh) * 2020-06-10 2020-09-11 湖北众堃科技股份有限公司 一种无堵塞固定式潜水排污泵
CN111648969B (zh) * 2020-06-10 2021-10-08 湖北众堃科技股份有限公司 一种无堵塞固定式潜水排污泵

Also Published As

Publication number Publication date
CH451426A (de) 1968-05-15
NL6700596A (de) 1967-07-14
DE1628609B2 (de) 1975-10-23
FR1508478A (fr) 1968-01-05
GB1102489A (en) 1968-02-07
DE1628609A1 (de) 1971-04-29

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