Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3718149 A
Publication typeGrant
Publication dateFeb 27, 1973
Filing dateJan 22, 1971
Priority dateFeb 4, 1970
Also published asDE2039441A1
Publication numberUS 3718149 A, US 3718149A, US-A-3718149, US3718149 A, US3718149A
InventorsMazza L
Original AssigneeZanussi A Spa Industrie
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dish-washer
US 3718149 A
Abstract
In a dish-washing machine of the type having two separate washing zones in which delicate tableware and cooking utensils are respectively charged, there being two detergent dispensers, the second of which is capable of supplying detergent only to the cooking utensil washing zone and is operated as a result of the rise of the washing temperature in the zone for the cooking utensils.
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

Ute States atet 1191 Mazza 13,71,149 5] Feb. 27, 1973 .........134/93 ......134/93 UX ...134/115 R X DISH-WASHER 1,897,821 2/1933 P011 1447,304 3 1923 H k.. [75] Inventor: Lamberto Mazza,Pordenone,ltaly 217,721 1965 zg I [73] Assignee: lndustrie A. Zanussi S. p. A., F r. 3,253,784 5/1966 Long et Italy FOREIGN PATENTS 0R APPLICATIONS Jan. 22, 1971 21 Appl. No.: 108,898

811,501 4/1969 Canada............................ 1,380,262 10/1964 France 1,500,537 9/1967 France [22] Filed:

[30] Foreign Application Priority Data Primary Examiner-Robert L. Bleutge Feb 4 1970 Attorney-Holman & Stern [57] ABSTRACT In a dish-washing machine of the type having two [52] U.S. Cl....................134/57 D,134/93,134/101,

{51] Int. Separate Washing Zones in which delicate tableware and cooking utensils are re .B08b 3/02 134/93,100,101,115 R, 176,

spectively charged, there [58] Field of Search....

being two detergent dispensers, the second of which is capable of supplying detergent only to the cooking utensil washing zone and is operated as a result of the rise of the washing temperature in the zone for the cooking utensils.

[56] References Cited UNITED STATES PATENTS 3,586,011 6/1971 Mazza D 2 Claims, 2 Drawing Figures PATENTEU m2? 1973 lll llll llll DISH-WASHER BACKGROUND OF THE INVENTION The present invention relates to a dish-washing machine and constitutes an improvement of the dishwashing machine described and claimed in the U.S. Pat. application No. 847,166, now U.S. Pat. No. 3,586,011 issued June 22, 1971, which provides for two separate washing zones in which delicate tableware and cooking utensils are loaded respectively and each of the zones is provided with at least one jet spray, while there are cutoff means capable of cutting off the washing solution supply to the zone containing the delicate tableware. The advantages of this method were fully described in the above mentioned U.S. Pat., to which reference should be made on the subject.

It has now been found and it constitutes the object of this invention that the washing efficiency is considerably increased if the treatment process for cooking utensils such as provides for the use of a more concentrated solution of detergent (with a more intense chemical action) or the use of a very aggressive detergent such as is generally inadvisable for crockery and glassware.

SUMMARY OF THE INVENTION For this purpose, the dish-washing machine according to the present invention, and which is of the type described and illustrated in the U.S. Pat. No. 3,5 86,01 1 is provided with a second detergent dispenser capable of supplying the cooking utensil washing chamber only.

Preferably, such second dispenser is of the thermostatically controlled type, i.e. it is operated as a result of the rise in washing temperature in the zone designed for cooking utensils. In another preferred form of construction, the control operating the second dispenser is effected electrically by the timer-programmer of the dish-washing machine.

In this case, it is advisable and preferable that the control operating the second dispenser, which control is effected by the programmer, should be the same as the one excluding the washing solution from the zone containing the delicate tableware. As indicated above, in the second dispenser, it is possible to load an addition of detergent which is subsequently used to augment the concentration of detergent in the washing solution and, in combination with the higher temperature, it increases the efficacy of the washing action on the cooking utensils.

In another likewise preferred version of the present invention, the second dispenser is designed to feed a chemically more aggressive detergent to the zone containing the cooking utensils.

It is clear that selection of one or the other alternative depends on other factors, mainly the washing temperature in both zones and the increase in temperature in the stage of the cycle in which cooking utensils only are treated.

In this way, although there is only one hydraulic circuit and possibly only one detergent liquid, the same washing programme can perform two different washes, in which not only are the washing temperatures for the delicate tableware and for the cooking utensils, but a difference in the degree of chemical aggressiveness of the washing solution is also engendered.

LII

For the purpose of further illustrating the present invention, a preferred method of implementation thereof will now be described with reference to the attached drawings, it being understood that it has no limiting effect on the sphere of the invention.

BRIEF DESCRIPTION OF THE DRAWING In the attached drawings:

FIG. 1 is a perspective diagrammatic view of the dish-washing machine according to the invention; and

FIG. 2 is a diagrammatic side sectional view of the machine in FIG. 1.

DETAILED DESCRIPTION OF THE DRAWINGS With reference to the drawings and bearing in mind that the dish-washing machine described is of the type illustrated in the U.S. Pat. No. 3,586,011 it comprises a cabinet 600 in the tank being housed a tank 610, the inside of which is divided by means of a or baffle 613 into two zones 611 and 612, respectively designed for washing cooking utensils such as saucepans and delicate tableware such as dishes and glassware. The means of division are of the type illustrated in the U.S. Pat. No. 3,586,011.

On the bottom of the tank 610 is a washing solution collection trap 614, and the drainage thereof through suitable valves, (not illustrated), takes place via a pipe 615 to a circulation and washing pump intake 616, or a pipe 650 to a pump 651 discharging to the outside.

Each zone 611 and 612 is provided with at least one swivelling sprayer, respectively 617 and 618, with each having spray nozzles capable of directing washing solution against the delicate tableware or the utensils loaded in appropriate baskets 652 and 653 housed on slides in the two zones 611 and 612 respectively. The sprayers 617 and 618 are fed through a pipe 619, in which there are means by which at an appropriate moment in the cycle, to cut off the supply of washing solution to the sprayer 618 and hence to the zone 612, in which washing of the delicate tableware takes place.

As shown in FIGS. 1 and 2, for access to the washing tank 610, there is a door 65 1 in which a timer-programmer 655 is mounted, as well as a normal detergent dispensing device 656 and a supplementary detergent dispenser 657 controlled by the timer 655, through an electrical connection 658, and possibly under the control of a thermostat 659.

It is clear in any case that any system of controlling the supplementary detergent dispenser 656 can be used while remaining with the framework of the present invention.

What is claimed is:

1. In a dish-washing machine of the type having a wash chamber subdivided by a bafile into two zones for the loading of delicate tableware and cooking utensils respectively, a first detergent dispensing device, at least one sprayer for each zone, a single wash pump feeding wash solution to each sprayer, and an interception member controlled by means which senses the temperature of the wash solution to exclude the flow of solution heated above a pre-determined temperature to the delicate tableware in the corresponding zone, the improvement comprising a second detergent dispensing device, a means operably connected to the second dispensing device controlling said second gressiveness, destined specifically for washing cooking utensils.

2. The dish-washing machine in accordance with claim 1, in which said controlling means is defined by a timer-programmer and/or by a thermostat.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1447304 *Sep 22, 1920Mar 6, 1923Standard Utilities CorpDishwashing machine
US1897821 *Aug 22, 1931Feb 14, 1933Poli GlaucoDishwashing device
US3217721 *Nov 22, 1963Nov 16, 1965Siemens Elektrogeraete GmbhAutomatic dishwashing machine with a plurality of wash chambers
US3253784 *Apr 22, 1964May 31, 1966Westinghouse Electric CorpDishwasher
US3586011 *Aug 4, 1969Jun 22, 1971Zanussi A Spa IndustrieDish washer
CA811501A *Apr 29, 1969Ontario Store Fixture Co LtdWashing machine for glassware
FR1380262A * Title not available
FR1500537A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4070204 *Jan 22, 1976Jan 24, 1978General Electric CompanyLow-energy dishwasher
US4179307 *May 15, 1978Dec 18, 1979Montedison S.P.A.Dish-washer consisting of an assembly of functional units made of thermoplastic material
US4296768 *Oct 1, 1979Oct 27, 1981Saucedo Rudy EPortable dishwasher
US5331986 *Mar 1, 1993Jul 26, 1994Daewoo Eelctronics Company, Ltd.Dishwashing machine
US6260565 *Sep 21, 1998Jul 17, 2001Maytag CorporationDouble dishwasher
US6460555Aug 22, 2000Oct 8, 2002Maytag CorporationDual dishwasher construction
US6491049Aug 22, 2000Dec 10, 2002Maytag CorporationLid construction for drawer dishwasher
US7069181Jun 21, 2004Jun 27, 2006BSH Bosch und Siemens HausgeräteMethod of determining the energy and water consumption of dishwashers, and dishwashers
US7331356Aug 8, 2006Feb 19, 2008Whirlpool CorporationMultiple wash zone dishwater
US7445013Jun 17, 2003Nov 4, 2008Whirlpool CorporationMultiple wash zone dishwasher
US7475696Dec 30, 2004Jan 13, 2009Whirlpool CorporationDishwasher having valved third-level sprayer
US7523758Dec 30, 2004Apr 28, 2009Whirlpool CorporationDishwasher having rotating zone wash sprayer
US7594513Apr 11, 2008Sep 29, 2009Whirlpool CorporationMultiple wash zone dishwasher
US8454762Jan 30, 2012Jun 4, 2013Whirlpool CorporationDishwasher
US8454763Jan 30, 2012Jun 4, 2013Whirlpool CorporationDishwasher
US8753454Mar 15, 2013Jun 17, 2014Whirlpool CorporationDishwasher
US8764908Mar 15, 2013Jul 1, 2014Whirlpool CorporationMethod of controlling the operation of a dishwasher
US20100275954 *Jan 23, 2008Nov 4, 2010Gs Development AbDishwasher with basket detecting device
EP1122351A1 *Jan 26, 2001Aug 8, 2001Esswein S.A.Mechanical product dispenser for household apparatus
EP1854392A1 *May 11, 2006Nov 14, 2007Electrolux Home Products Corporation N.V.Method for washing glass articles in a household dishwashing machine
EP2117409A1Jan 23, 2008Nov 18, 2009Gs Development AbDishwasher with basket detecting device
EP2177147A2 *Sep 11, 2009Apr 21, 2010Vestel Beyaz Esya Sanayi Ve Ticaret A.S.Method for opening a detergent chamber
EP2329756A1 *May 11, 2006Jun 8, 2011Electrolux Home Products Corporation N.V.Method for washing glass articles in a household dishwashing machine
WO2003053209A1 *Nov 25, 2002Jul 3, 2003Bsh Bosch Siemens HausgeraeteMethod for the detection of the energy and water consumption of dishwashers, and dishwashers
WO2011158270A2Jun 15, 2011Dec 22, 2011Sergio ZaglioDishwashing machine
Classifications
U.S. Classification134/57.00D, 134/99.2, 134/93, 134/103.1, 134/115.00R
International ClassificationA47L15/44, A47L15/42
Cooperative ClassificationA47L15/42, A47L15/4409
European ClassificationA47L15/44A, A47L15/42