US1521989A

US1521989A - Dishwashing machine

Info

Publication number: US1521989A
Application number: US568004A
Authority: US
Inventors: Bergstrom Carl Johan Oscar
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-06-13
Filing date: 1922-06-13
Publication date: 1925-01-06
Anticipated expiration: 1942-01-06

Description

' Jan, 6. 1925.

.c. J. o. BERGSTROM msmmsume MACHINE Filed June 1 5, 1922 2 Sheets-Sheet 1 llllllllll IIEUMII M Y. b 0. R

T w R F? M A I v 1 a J n /W m c. J. o. BERGsTROM' DISHWASHING MACHINE Filed June 13, 1922 2 Sheets-Sheet 2 CARL \JOHAN'OSCAR BEnssTnM 45 r rangedin such manner relatively to the Patented Jan. 6, 1925.

uu rsu s'rA'rss PATENT OFFICE.

cant JOHAN oscan zenaes'rnbm, or EBBES :BRUK, NEAR. nusxvanna, swnmm.

msnwa'smne momma.

Application and June 13,1922. Serial m5. 568,004.

To all whom it may concern:

Be it known that I, CARL JOHAN OSCAR Bnnes'rnoM, a subject of the King of Sweden, residing at.Ebbes Bruk, near Huskvarna, Sweden, have invented a new and useful Improvement in Dishwashing Machines (for which I have made apphcation in Sweden, Dec. 22, 1920, No. 5900/1920),-of

which the following is a specification.

with a less consumption of power than those heretofore required in similar machmes, so

that .the machine maybe used with advantage also in small establishments. I The invention is principally characterized by this that the device or spurting water on the dishesconsists of a combined fan and pump, which is arranged in such manner that the pump draws water from the bot- .tom of the tank to the fan, which communicates with an air inlet and thus draws in air by means of which. it throws the water against the dishes. In this manner the resuit is attained that the water may be great velocity and with a considerably smallerv consumption of power than by the use. of an ordinary. ump which only pumps water, and in additionthe air also aids in blowing the dishes clean. When the dishes.

have been washed in this manner the water is drained .off, so that only air is blown against the dishes which in this manner will be dried in the courseof a few minutes. The combined fan and pump may suitably be arcage that the dishes laced in said cage are squirted with water man inclined direction from below upwards. -In this manner also deep bowls, such as cups and the like, which are placed in inverted position in the cage, may be washed clean without said 'bowlstaking up water which would of course noosesitate an increase of the quantity of c1r-- culatingwater.

; n the accompanying drawings two em- The present invention relates to an imthrown against the dishes with the required bodiments of theginvention are illustrated by way of example. Fig. l'shows a'vertical section of a dish-washing machine according to the invention, and Fig. 2 shows a plan now of the same.- Fig. 3 shows a section and Fig. 4 a top view, partly insection, of the combined fan and pump. 'Fi 5 shows a slightly modified construction'o the dish-" washing machine in vertical section.

Inthe embodiments illustrated, '1 denotes the tank of the, machine which is supported by the feet 2. The tank 1 may either be open at the top, as in the construction illustrated in Figs. 1 and 2, or provided with a lid 3, as shown in Fig. 5. In said tank there is provided a cage 4 for receiving the dishes; In the embodiments illustrated said cage consists of two portions, a lower portion for receiving plates and other large articles, and an upper portion .for cups and the. like. .The'cage is rotatably supported on a shaft 5 projecting from the bottom of thetank 1, so 'that said'cage maybe caused to rotate bythe'waterwhich isv thrown upon the dishes. e

I A: casing 6 for the combined fan and pump is secured to one side of the tank 1, the interior of said casing being in open co unication with the tank 1. In the embodi ts illustrated the combinedfan and pump is formed by a single bucket wheel which is secured to an inclined shaft 7. Said shaft 7 is journ'alled in bearings'encircled by an upstanding sleeve 16 on a memher'i'l which'is secured to and forms alid of the Y casing 6. A greasecup 18 is threaded into said sleeve 16 and serves to supply lubricant v to said shaft 7, which is driven'by a small electric motor'8 which is secured toa plate- 19 made integral with orattached to the member 17. The bucket wheel is provided which extending along the shaft 7, are bent forward in the direction of rotation at their encircled a cylindrical sleeve or ring 20 secured to said portions 9 and which acts to. conductithe water raised by said bucket portions, upwards to the fan wheel blades 10..

The lower-portion of the bucket wheel, i. e.

with angular blickets or blades the legs9 of the bucket portions 9 and the encircling sleeve .20, thusforms a pump whichraises the waterto the upper portion of the bucket wheel, namely the blade portions 10 which forma fan combined with said pump. The air inlet to said fan wheel is located at 11, that is to say-at the pointwhere the axial and radial portions of the buckets or blades meet, and consists of a clearance space or opening between the surface of the water in the tank and the lower edge of a partition or web 21 in the casing 6, which web 21, together with a portion of the wall of said casing 6, form a lower wall of a. casing for the fan wheel, the upper wall of such casing I being formed by the member 17.

The tank 1 and the casing 6 are-intended" to be filled with water only to the level shown in Figs. 1 and 5, that is to say to such height that the lower portionof the Bucket wheel, i. e. the' pump wheel, operates in the water, whereas the upper portion of the bucket wheel. i. e. the fan wheel, operates in air. Vhen the motor 8 .is started the pump wheel will raise water to the fan wheel, which draws in. air through the space or opening 11 and compresses such air in the fan wheel casing'formed by the member 17 and the casing 6 and web 21, and by means \of the air compressed throws the water sides of the dishes which will thus be thoragainst the dishes with-such velocity that cage 4 begins to rotate on the shaft 5. .In this manner water .will be thrown on' all oughly cleaned. As shown in Figs. 1 and 5, the pump,the fanand the motor are placed in such inclined position'that the water is thrown in an inclined direction upwards bowls,

against the dishes in the cage 4. The water being thus thrown on the dishes in an inclined direction from below upwards it is possible alsotowash cups and similar deep which are placed in the cage 4 in inverted position, which entails the advantage that no water remains in the cups, but all water will immediately HOW to the bottom of thetank, again to be raised by the pump wheel. In this manner the quantity of water required in the machine is decreased.

In order toprevent the fan wheel from also operating in water, if by oversight the tank 1 is filled to a higher level than that intended, it is suitable to place the airjinlet to t e fan in communication with a separate air inlet tube 12 which extends upwards to the upper portion of the tank 1, and the lower end of which opens just opposite the, air inlet 11 of the fan casing. In this man-' ner it is secured that the fan wheel will always draw in air even if the water level in the tank stands higher than the air inlet 11 to the fan In this manner overloading of the motor 8 is also avoided.

\ The tank 1 is provided in the usual manner with a bottom-drain 13 which may be closed by. means of a valve and which serves the In the construction shown in Fig. 5," the shaft 5 which supports the cage 4, is capable of .moving in vertical direction through a packing box 15 in the bottom of the tank 1, and is connected by means of a lever and link mechanism with the lid 3, so that said lid will be automatically opened when the dishes have been washed and thecage with the dishes are lowered, so that said cage comes to rest .on the bottom of the tank.

I claim:

1.. In a dish-washing machine, the combination of a tank, a cage in said tank for receiving the dishes, and'a combined fan and pump, including a casing provided with an air inlet to said fan, said pump being adapted to raise water from the bottom of said tank to said fan, and said fan being adapted to draw air through said inlet and by means of such air to throw the water against the dishes in said cage, for the purpose of 0b- .taining an eflicient washing of'the dishes 'with the smallest possible quantity of water.

2. A dish-washing machine as claimed in side of the tank and in an inclined position so thatit will throw water in an inclined direction. upwards in the tank.

3. In a. dish-washing machine, the combination of a tank, a cage in said tank for receiving the dishes, and a combined fan and pump, including a casing provided with an air inlet to said fan, said pump being adapted to raise water from the bottom of said tank to said fan, and said fan being adapted to draw'air through said inlet and by-means of such air to throw the water against the dishes in said cage, said combined fan and pump consistingof a single bucket wheel having a shaftand angular buckets secured to said shaft, the legs of said buckets extendin along said shaft having their lower ends bent forward in the direction of rotation so as to be capable of raising water, and the other legs of said buckets extending radially forming-a fan wheel, the air inlet tosaid fan bein located at the point where said axial am? radial legs of the bucketsmee't.

4. A dish-washing machine as claimed in claim 3, in which an air-inlet tube communicates with the airinlet to the fan and extends to the upper portion of the tank, for

the purpose that the fan wheel shall be capable of drawing in air also if the 'ater level in the tank is above the air inlt to the fan. emu. JOHAN oscAR BERGSTRiiH/i.