EP0505685B1 - Improved extractable filter for dishwashing machines - Google Patents

Improved extractable filter for dishwashing machines Download PDF

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Publication number
EP0505685B1
EP0505685B1 EP92101307A EP92101307A EP0505685B1 EP 0505685 B1 EP0505685 B1 EP 0505685B1 EP 92101307 A EP92101307 A EP 92101307A EP 92101307 A EP92101307 A EP 92101307A EP 0505685 B1 EP0505685 B1 EP 0505685B1
Authority
EP
European Patent Office
Prior art keywords
filter
extractable
dishwashing machines
residues
improved
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
EP92101307A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0505685A1 (en
Inventor
Gaetano Olivieri
Marcello Premoli
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.)
Whirlpool EMEA SpA
Original Assignee
Merloni Elettrodomestici 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
Family has litigation
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Application filed by Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0505685A1 publication Critical patent/EP0505685A1/en
Application granted granted Critical
Publication of EP0505685B1 publication Critical patent/EP0505685B1/en
Anticipated expiration legal-status Critical
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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
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters

Definitions

  • the present invention relates to an extractable filter for dishwashing machines, as defined in the preamble of the appended claim 1.
  • Dishwashing machines are known that are provided with filters for avoiding that the residues removed from the dishes be placed in circulation with the washing liquid and deposited again on the dishes.
  • filters are normally composed of two filtering elements; one being made of a fine mesh for withholding the small particles of residues, while a second filtering element of a larger mesh being extractable for cleaning purposes, has the task of withholding the larger particles, i.e. pieces of meat, tooth picks or the like, so as to inhibit that such particles go on to block the drainage pump.
  • This kind of second filter made up of a large mesh for avoiding the hinderance and blockage of the drainage of the washing liquid, is substantially of cylindrical shape and made of plastic material for ease and construction economy.
  • the inferior section can be made closed so as to avoid large residues such as tooth picks or the like, passing through the outlets and being drawn by the drainage pump with the risk of blockage, the consequence of which being drainage hinderence, overheating of the pump's motor, which could also cause it to burn out.
  • the filter becomes more complex, expensive and more difficult to clean, as when extracted it is possible that the various components become dismantled, thus causing difficulties for the user that may have problems in its reassembly.
  • an extractable filter of the above type is disclosed, provided with apertures in the lower part and with a downwardly open chamber in the upper part, with the aim of preventing, during the draining phases of the washing liquid, the backflow of small residues, which could therefore deposit of the fine mesh filter and be recirculated by the washing liquid during a successive washing phase.
  • the embodiments described in FR-A-2 378 493 which are of complex and expensive realization, do not however avoid the possible passage of toothpicks or small bones through the filter, which could cause the blockage of the drain pump, or the falling of the retained residues, during the removal of the filter.
  • DE-B-1 158 942 is also known a dishwashing machine which is provided with a filtering device arranged in the lower portion of the washing chamber of the machine; said filtering device is formed by a plurality of linked concentric rings which define a series of drain opening, the dimensions of which can be varied upon a command, for two different operating conditions. Also the filtering device disclosed in DE-B-1 158 942 drastically presents the risk of passage of residues being thin but sufficiently long to hinder the correct operation of the drain pump, which can be horizontally conveyed by the washing liquid through said rings; this is due to the fact that the sump of the dishwashing machine does not have a sufficiently restricted section, which would avoid this residues to assume said horizontal position.
  • the aim of the present invention is to indicate a filter for dishwashing machines that does not present the inconveniences of the type known.
  • the present invention has as its object an extractable filter for dishwashing machines, as defined by the characterising features of the independent claim 1.
  • Other improvements and embodiments of the invention are indicated in the dependent claims
  • reference number 1 indicates the filter, realised in stamped plastic material, where outlets 2 are obtained in the cylindrical section due to a plurality of uprights, which allow for the lateral drainage of the washing water; reference number 3 represents protruding wings that allow for the extraction of the filter for cleaning purposes and its placing in a working position; reference number 4 indicates two known means for holding the filter in place during washing; with the reference number 5 the filter bottom in the form of an upturned cone is indicated, made up of a series of concentric flat rings positioned at various levels an held in place with a plurality of uprights, as in the cylindrical section, thus creating a number of outlets 7 that allow for the drainage of the washing water at the lower section.
  • Said concentric rings are realised in such a way the outer circumference of one ring is the same as the internal circumference of the successive ring.
  • FIG. 4 Another variant of the filter for dishwashing machines could be that represented in figure 4 in which the level of the concentric rings of the bottom are inclined towards the bottom, so as to facilitate the passage of the particles of residues and in preventing them from depositing, thoroughly, on the concentric rings.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Filtering Materials (AREA)
EP92101307A 1991-01-31 1992-01-28 Improved extractable filter for dishwashing machines Expired - Lifetime EP0505685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO910063A IT1245021B (it) 1991-01-31 1991-01-31 Perfezionamenti ad un filtro estraibile per lavastoviglie
ITTO910063 1991-01-31

Publications (2)

Publication Number Publication Date
EP0505685A1 EP0505685A1 (en) 1992-09-30
EP0505685B1 true EP0505685B1 (en) 1997-05-14

Family

ID=11408854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101307A Expired - Lifetime EP0505685B1 (en) 1991-01-31 1992-01-28 Improved extractable filter for dishwashing machines

Country Status (4)

Country Link
EP (1) EP0505685B1 (es)
DE (1) DE69219656T2 (es)
ES (1) ES2102416T3 (es)
IT (1) IT1245021B (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344245C2 (de) * 1993-12-23 1997-03-06 Bosch Siemens Hausgeraete Einrichtung an Geschirrspülmaschinen zum Filtern des Spülwassers
DE19811436A1 (de) * 1998-03-17 1999-09-23 Whirlpool Co Geschirrspülmaschine
FR2786086B1 (fr) * 1998-11-20 2001-02-02 Esswein Sa Dispositif de filtrage gros dechets pour appareil de lavage electromenager
DE10208992B4 (de) * 2002-02-28 2007-06-28 Whirlpool Corp., Benton Harbor Filtersieb für ein flüssigkeitsführendes Haushaltsgerät, insbesondere eine Geschirrspülmaschine
IT1399412B1 (it) * 2010-04-08 2013-04-16 Bitron Spa Accessorio bifunzionale per macchina lavastoviglie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158942B (de) * 1961-07-20 1963-12-12 Nothelfer & Soehne Werkzeug Un Filterspaltsieb fuer Fluessigkeiten, insbesondere fuer Geschirrspuelmaschinen
FR1418707A (fr) * 1964-12-24 1965-11-19 Machine à laver la vaisselle
DE2703434C3 (de) * 1977-01-28 1981-03-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einrichtung an Geschirrspülmaschinen zum Filtern des Spülwassers
DE3426661C1 (de) * 1984-07-19 1985-10-17 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Einrichtung an Geschirrspuelmaschinen zum Filtern des Spuelwassers

Also Published As

Publication number Publication date
IT1245021B (it) 1994-09-13
DE69219656D1 (de) 1997-06-19
DE69219656T2 (de) 1997-10-02
EP0505685A1 (en) 1992-09-30
ITTO910063A0 (it) 1991-01-31
ITTO910063A1 (it) 1992-07-31
ES2102416T3 (es) 1997-08-01

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