US2448490A - Dishwasher having deflecting recesses in the wall thereof - Google Patents

Dishwasher having deflecting recesses in the wall thereof Download PDF

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Publication number
US2448490A
US2448490A US511665A US51166543A US2448490A US 2448490 A US2448490 A US 2448490A US 511665 A US511665 A US 511665A US 51166543 A US51166543 A US 51166543A US 2448490 A US2448490 A US 2448490A
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United States
Prior art keywords
recesses
recess
wall
jets
receptacle
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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
US511665A
Inventor
Karlstrom Fredrik Johan Robert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux AB
Original Assignee
Electrolux AB
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
Priority to US329092A priority Critical patent/US2351342A/en
Priority claimed from US329092A external-priority patent/US2351342A/en
Priority to DEA1899D priority patent/DE910719C/en
Priority claimed from GB1369341A external-priority patent/GB552580A/en
Priority to DEA1900D priority patent/DE926931C/en
Priority to FR879707D priority patent/FR879707A/en
Priority to GB4699/42A priority patent/GB554580A/en
Application filed by Electrolux AB filed Critical Electrolux AB
Priority to US511665A priority patent/US2448490A/en
Publication of US2448490A publication Critical patent/US2448490A/en
Application granted granted Critical
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
    • A47L15/14—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
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J9/00—Milk receptacles
    • A01J9/04—Milk receptacles with cooling arrangements
    • 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
    • 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
    • A47L15/4246—Details of the tub

Definitions

  • My invention relates to a dish washer of the type having means for discharging jets of cleaning liquid against the dishes placed in a container. Depending on how the dishes are placed in the container, certain of the jets will not strike the dishes, but will impinge onI a wall of the container, and it is an object oi' my invention to redirect such jets so that they will impinge on the dishes.
  • the walls are formed with concave recesses, the bowlshaped surfaces of which may be spherical, o-r may be elongated in the direction of the jets with the end of each recess which faces the jet decreasing in depth and width while the opposite end is spherical.
  • Fig. 1 shows in section a dish washing machine constructed according to the invention.
  • Fig. 2 shows part of a wall provided with bowlshaped recesses according.to the invention and intended to be fixed to' the inside of the cover of the washing-up container, and
  • Fig. 3 is a section along the line III- III of Fig. 2.
  • Fig. 1 80 designates the container of th dish washing machine for the reception of washing liquid, and of the dishes or the like to be washed.
  • a screen 90 At ⁇ the lower part of the container is provided a screen 90 on which the dishes are placed, for example in a suitable basket or the like.
  • Below the screen there is a rotatable spraying member 9
  • the recesses 84 are composed of a spherical or approximately spherical part 85, said part being the upper one in the embodiment shown, and of a more elongated part 86 which passes into the surface of the plate 82 and the bottom portion of which may, if desired, be plane.
  • the extension and longitudinal section of the bowls are clearly seen from Fig. 1. The left-hand part of Fig.
  • FIG. 1 also shows how those jets which donot strike the dishes strike instead the bowls 84 and are deflected by them, with the result that the dishes are struck by jets not only from below but'also from the side and obliquely from above.
  • the part 86 of the recesses 84 tapering in section downwardly has for its object to allow the surface of the bowl to gradually change the direction of the jets and also makes it possible for the maximum number of jets to strike the bowl-shaped surfaces. As shown in Fig.
  • each recess 84 in the side walls is such that the intersection of the surface of the recess with a plane normal to the wall and parallel to the stream which strikes it is a straight line along the lower portion of the recess, that is the portion adjacent the spraying member, and is an arc along the remainder of the recess, with the line being tangent to the arc. It is important that the edge of the portion of each recess where the re-directed jet leaves the recess, that is the upper part (Fig. 1) of the bounding edge of each recess, should be sharp, for the purpose of preventing the jets from being split up by adhesion, in which case they would lose their coherence and thereby their washing power.
  • ⁇ 2 and 3 have wholly spherical or approximately spherical surfaces, because they lack the extension 86, to be found in the recesses 84 according to Fig. 1.
  • the bowl-shaped recesses 81 are, in fact, intended to change the direction of the jets passing between the dishes, coming from below and striking the cover almost at right angles, said jets being forthis purpose deflected in an almost opposite direction, that is, so that they pass downwardly.
  • the recesses 84 and 81 may be pressed directly into the side walls of the container 8D or the underside of the cover 8
  • a receptacle a sprayer member within said receptacle, and means for supplying water under pressure to said member to thereby produce a plurality of high velocity streams
  • a sprayer member within said receptacle, and means for supplying water under pressure to said member to thereby produce a plurality of high velocity streams
  • an interior wall of said receptacle being formed with a multitude of closely spaced concave bowl-shaped recesses, the surface of each recess intersecting the surface of the wall along a single line closed on itself, said recesses being small enough so that each recess will be implnged by not more than one of said streams which will be redirected towards the interior of the receptacle by the bowl-shaped concave surface of the recess with a minimum of lateral spreading of the stream, each of 4saidv recesses being elongated in the direction of the stream which impinges it.
  • a dishwashing apparatus a receptacle, a sprayer member within said receptacle, and means for supplying water under pressure to said member to thereby produce a plurality of high velocity streams
  • an interior wall of said receptacle being formed with a multitude of closely which impinges it and having a shape such that ⁇ spaced concave bowl-shaped recesses, "the surface of each recess intersecting the surface of the wall along a single line closed on itself, said recesses being small enough so that each recess will be impinged by not more than one of said streams which will be redirected towards the interior of the receptacle by thebowl-shaped concave surface of the recess with aminimum of lateral spreading of the stream, each of said recesses being elongated in the direction of the stream the intersection of the surface of the recess with a plane normal to the wall and parallel to the stream is a straight line along the portion of the recess adjacent the spraying member and is an

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  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Dairy Products (AREA)

Description

G O www TEl Mcm omal.
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Patented Aug. 31, 1948 l DISHWASHER HAVING DEFLECTING RE- CESSES IN THE WALL THEREOF Fredrik Johan Robert Karistrm, Stockholm, Sweden, assignor to Aktiebolaget Elecktroiux, Stockholm, Sweden, a corporation of Sweden original application April 11, 1940, serial No.
329,092. Divided and this application November 25, 1943, Serial No. 511,665.
April 12 1939 My inventionrelates to a dish washer of the type having means for discharging jets of cleaning liquid against the dishes placed in a container. Depending on how the dishes are placed in the container, certain of the jets will not strike the dishes, but will impinge onI a wall of the container, and it is an object oi' my invention to redirect such jets so that they will impinge on the dishes.
This is accomplished .by providing the inner walls oi the container with surfaces so formed as to deflect the jets with a minimum loss of energy. In accordance with my invention, the walls are formed with concave recesses, the bowlshaped surfaces of which may be spherical, o-r may be elongated in the direction of the jets with the end of each recess which faces the jet decreasing in depth and width while the opposite end is spherical.
This application is a division of application Serial Number 329.092, led April 11, 1940, now issued as Patent Number 2,351,342, dated June 13, 1944.
The accompanying drawing shows two embodiments of the invention.
Fig. 1 shows in section a dish washing machine constructed according to the invention.
Fig. 2 shows part of a wall provided with bowlshaped recesses according.to the invention and intended to be fixed to' the inside of the cover of the washing-up container, and
Fig. 3 is a section along the line III- III of Fig. 2.
In Fig. 1, 80 designates the container of th dish washing machine for the reception of washing liquid, and of the dishes or the like to be washed.A At` the lower part of the container is provided a screen 90 on which the dishes are placed, for example in a suitable basket or the like. Below the screen there is a rotatable spraying member 9| having openings 92 through which the washing liquid. as indicated in the drawing,
' is forced in the form of -jets upwardly through l the screen 90 and against the dishes supported thereon. Washing fluid under pressure is supplied to spraying member 9| through a conduit l from a suitable pump l2. The cover of theeontainer is designated by 8i. On the'sides of the container there are arranged plates 82 which may consist of some mouldable material, such as rubber, synthetic resin, metal or the like. Corresponding plates 83 (Figs. 2 and 3) may be arranged on the underside of the cover 8|. In
the plates 82 and 83 there are a. number of bowl- In Sweden 3 Claims. 4(ol. 134-182) A 2 the container.l These bowl-shaped recesses possess unbroken surfaces. The recesses 84 are composed of a spherical or approximately spherical part 85, said part being the upper one in the embodiment shown, and of a more elongated part 86 which passes into the surface of the plate 82 and the bottom portion of which may, if desired, be plane. The extension and longitudinal section of the bowls are clearly seen from Fig. 1. The left-hand part of Fig. 1 also shows how those jets which donot strike the dishes strike instead the bowls 84 and are deflected by them, with the result that the dishes are struck by jets not only from below but'also from the side and obliquely from above. The part 86 of the recesses 84 tapering in section downwardly has for its object to allow the surface of the bowl to gradually change the direction of the jets and also makes it possible for the maximum number of jets to strike the bowl-shaped surfaces. As shown in Fig. 1, the shape of each recess 84 in the side walls is such that the intersection of the surface of the recess with a plane normal to the wall and parallel to the stream which strikes it is a straight line along the lower portion of the recess, that is the portion adjacent the spraying member, and is an arc along the remainder of the recess, with the line being tangent to the arc. It is important that the edge of the portion of each recess where the re-directed jet leaves the recess, that is the upper part (Fig. 1) of the bounding edge of each recess, should be sharp, for the purpose of preventing the jets from being split up by adhesion, in which case they would lose their coherence and thereby their washing power.
The bowl-shaped recesses 8,1 according to Figs.
`2 and 3 have wholly spherical or approximately spherical surfaces, because they lack the extension 86, to be found in the recesses 84 according to Fig. 1. The bowl-shaped recesses 81 are, in fact, intended to change the direction of the jets passing between the dishes, coming from below and striking the cover almost at right angles, said jets being forthis purpose deflected in an almost opposite direction, that is, so that they pass downwardly.
If desired, the recesses 84 and 81 may be pressed directly into the side walls of the container 8D or the underside of the cover 8|, even though said parts should consist of for example, sheet metal. It is not necessary that the bounding walls of the container should themselves be constructed with recesses according to the invention, since said recesses may also be arranged in, other parts located nearest to the dishes,
'Whatl claim is:
1. In av dishwashing apparatus, a receptacle, a sprayer member within said receptacle, and means for supplying water under pressure to said member to thereby produce a plurality of high velocity streams, an interior wall of said receptacle- 'being formed with a multitude of closely spaced concave bowl-shaped recesses, the surface of each recess intersecting the surface of the wall along a single line closed on itself, said recesses being small enough so that each recess will be im-pinged by notmore than one of said streams which will be redirected towards the interior of the receptacle by the bowl-shaped concave surface of the recess with a minimum of lateral spreading of the stream.
2. In a dishwashing apparatus, a receptacle,
a sprayer member within said receptacle, and means for supplying water under pressure to said member to thereby produce a plurality of high velocity streams, an interior wall of said receptacle being formed with a multitude of closely spaced concave bowl-shaped recesses, the surface of each recess intersecting the surface of the wall along a single line closed on itself, said recesses being small enough so that each recess will be implnged by not more than one of said streams which will be redirected towards the interior of the receptacle by the bowl-shaped concave surface of the recess with a minimum of lateral spreading of the stream, each of 4saidv recesses being elongated in the direction of the stream which impinges it.
3. In a dishwashing apparatus, a receptacle, a sprayer member within said receptacle, and means for supplying water under pressure to said member to thereby produce a plurality of high velocity streams, an interior wall of said receptacle being formed with a multitude of closely which impinges it and having a shape such that `spaced concave bowl-shaped recesses, "the surface of each recess intersecting the surface of the wall along a single line closed on itself, said recesses being small enough so that each recess will be impinged by not more than one of said streams which will be redirected towards the interior of the receptacle by thebowl-shaped concave surface of the recess with aminimum of lateral spreading of the stream, each of said recesses being elongated in the direction of the stream the intersection of the surface of the recess with a plane normal to the wall and parallel to the stream is a straight line along the portion of the recess adjacent the spraying member and is an arc along the remainder of the recess, said line being tangent to said arc.
FREDRIK JOHAN ROBERT KARLSTRM.
REFERENCES CITED 4The following references are of record in the le of this patent:
UNITED STATES PATENTS Certificate of Correction Patent No. 2,448,490. August 31, 1948 FREDERICK JOHAN ROBERT KARLSTRM It is hereby certified that name of the assignee in the above numbered patent was erroneously described and specified as Aktiebolaget Elecktrolux Whereas said name should have been described and specified as Aktz'ebolaget Elektrolux, as shown by the record of assignments in this Office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofice.
Signed and sealed this 29th day of March, A. D. 1949.
THOMAS F. MURPHY,
Assistant 'ommssz'oner of Patents.
US511665A 1939-04-12 1943-11-25 Dishwasher having deflecting recesses in the wall thereof Expired - Lifetime US2448490A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US329092A US2351342A (en) 1939-04-12 1940-04-11 Dishwasher
DEA1899D DE910719C (en) 1939-04-12 1941-10-23 Washing machine
DEA1900D DE926931C (en) 1939-04-12 1941-10-28 Dishwasher
FR879707D FR879707A (en) 1939-04-12 1942-02-25 Machine for washing plates or dishes, and other similar applications
GB4699/42A GB554580A (en) 1939-04-12 1942-04-10 Improvements in stands for milk coolers
US511665A US2448490A (en) 1939-04-12 1943-11-25 Dishwasher having deflecting recesses in the wall thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE2351342X 1939-04-12
US329092A US2351342A (en) 1939-04-12 1940-04-11 Dishwasher
GB1369341A GB552580A (en) 1941-10-24 1941-10-24 Improvements in or relating to dish washing machines
US511665A US2448490A (en) 1939-04-12 1943-11-25 Dishwasher having deflecting recesses in the wall thereof

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FR (1) FR879707A (en)
GB (1) GB554580A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756168A (en) * 1948-02-14 1956-07-24 Bell Telephone Labor Inc Cleaning of small articles
US3937236A (en) * 1974-10-07 1976-02-10 Mdt Chemical Company Ultrasonic cleaning device
US5503172A (en) * 1995-02-06 1996-04-02 General Electric Company Dishwasher machine tub with localized noise attenuation
US20070246077A1 (en) * 2006-04-20 2007-10-25 Maytag Corp. Dispenser rinse system for a drawer-type dishwasher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5449011A (en) * 1993-10-08 1995-09-12 General Electric Company Dish washing machine with improved wash mechanism

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1223261A (en) * 1916-07-19 1917-04-17 Benjamin P Critchlow Dish-washer.
US1335853A (en) * 1917-06-18 1920-04-06 George H Myrick Dish-washing machine
US1345519A (en) * 1919-07-07 1920-07-06 Vaudreuil John Casing for dish-washing machines
US1354022A (en) * 1915-11-20 1920-09-28 C K Co Dish-washing machine
US1511661A (en) * 1921-01-12 1924-10-14 George A Gumphert Dishwasher
GB443146A (en) * 1934-06-20 1936-02-20 John Little An improvement in washing machines
US2075034A (en) * 1933-04-07 1937-03-30 Lansing Dishwashing machine
GB473198A (en) * 1935-04-08 1937-10-07 Bolinders Fabriks Ab Dish-washing machine
US2236791A (en) * 1937-03-02 1941-04-01 Laval Separator Co De Dishwashing machine
US2301601A (en) * 1938-07-19 1942-11-10 W B Chemical Company Inc Dish washing apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1354022A (en) * 1915-11-20 1920-09-28 C K Co Dish-washing machine
US1223261A (en) * 1916-07-19 1917-04-17 Benjamin P Critchlow Dish-washer.
US1335853A (en) * 1917-06-18 1920-04-06 George H Myrick Dish-washing machine
US1345519A (en) * 1919-07-07 1920-07-06 Vaudreuil John Casing for dish-washing machines
US1511661A (en) * 1921-01-12 1924-10-14 George A Gumphert Dishwasher
US2075034A (en) * 1933-04-07 1937-03-30 Lansing Dishwashing machine
GB443146A (en) * 1934-06-20 1936-02-20 John Little An improvement in washing machines
GB473198A (en) * 1935-04-08 1937-10-07 Bolinders Fabriks Ab Dish-washing machine
US2236791A (en) * 1937-03-02 1941-04-01 Laval Separator Co De Dishwashing machine
US2301601A (en) * 1938-07-19 1942-11-10 W B Chemical Company Inc Dish washing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756168A (en) * 1948-02-14 1956-07-24 Bell Telephone Labor Inc Cleaning of small articles
US3937236A (en) * 1974-10-07 1976-02-10 Mdt Chemical Company Ultrasonic cleaning device
US5503172A (en) * 1995-02-06 1996-04-02 General Electric Company Dishwasher machine tub with localized noise attenuation
US20070246077A1 (en) * 2006-04-20 2007-10-25 Maytag Corp. Dispenser rinse system for a drawer-type dishwasher
US7749335B2 (en) 2006-04-20 2010-07-06 Maytag Corporation Dispenser rinse system for a drawer-type dishwasher

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FR879707A (en) 1943-03-03
GB554580A (en) 1943-07-09

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