Dishwashing machine and plural liquid spray means therefor

Nov. 20, 1951 f. τ. hilliker 2,575,493

DISHWASHING MACHINE AND PLURAL LIQUID SPRAY MEANS THEREFOR

Filed May 28, 1949

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FIG. 1. FIG. 2.

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FIG. 3. FIG. 4.

INVENTOR

Frank T Hilliker

BY

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ATTORNEY

Patented Nov. 20, 1951

2,575,493

UNITED STATES PATENT

OFFICE

2,575,493

DISHWASHING MACHINE AND PLURAL LIQUID SPRAY MEANS THEREFOR

Frank T. Hilliker.St.Louis.Mo.

Application May 28,1949, Serial No. 96,076

4CIaims.

(01..134-,96)

This invention relates in (general To certain new and -.useful (improvements Tn dishwashing machines.

The primary object of the present invention, is •to -provide ?a dishwashing.machineWhich is (compact in size and economical .in cost of construction.

Itis: another obj ect of: the present invention to provide a dishwashing machine which is unusually economical in operationand.is capable of:using rinse water containing atfish^sterilizing agent so that the excessive and wasteful use of large quantities of extremely hot water, as hitherto: required, may now be obviated. _ ... _________________

It :is also an objecteof -the present (invention to d5 cally disposedriserl4. Provided :at· the lower, end provide a dishwashing machineiadapted.for (performing successive (washing ;and rinsing operations in the same -chamber without intermixture of the washing-, and .rinsing solutions and par ticularly without contamination &gt; of The rinse .water by wash water.

It: is a further, obj ect, of·the present -invention to provide a dishwashing machine s embodying valve means actuatedby pressure imparted to the •washing and rinsing solutions for «circulating The solutions Through The?machine returning sameTo their respective tanks of origin.

It is an additional Object of the present invention To -provide dishwashing machines ^having either end with conventional service Tables 5 through doors 6,-6',’mounted.in the opposite side walls .of the· chamber- 3 -for vertical sliding-movement -whereby conventional_: dishwashing’ racks 7

Λ containing-soiledTableware I' may be easilyrin· sertedtherein and’removed therefrom.

Provided within the, chamber .-3 ; adjacent the top-and&lt;bottom.is a plurality of spray or distrib10 utingpipes-8,-9, respectively, disposed for-ejecting fluid onto The dishes from above and below through orifices 10, 11, respectively. The ’ pipes 8, 9, are: connected at their forward ends to transversely extending heads or manifolds 12, 13, -.respectively, -which are? in Turn-connected tora vertiof the-chamber .3 and extending inwardly from the side=walls thereof is a,flange -·| 5 -to the underface of -which is «suitably ’secured,, as by welding, -the upper, mar gins of.a drain or catch plate -(=6, 20 which extends ..across the chamber 3 -and forms the bottom thereof. Said -plate 16 inclines or slopes downwardly toward: its -center, as at 16'. .Opening upwardly into The rearward centrahportion of the drain plate 16 is a -V-shaped drain valve 25 π having .its, sides open in the formation of-discharge ports 17',.17, .and ?is .provided -with,a deflector- or-flapper .member 4 8 mounted upon ,a rock shaft 19 journaled inland-extending through The end -walls of .the valve! 7,.said-deflector, member ! 8 means for effecting washing and rinsing opera- is thereby adapted, upon rotation of-the-shaft 49, to .rest optionally .closure-wise .across one -or,the other of the .ports 17', 47, for. directing drainage -through theopen,por.t,1.7',.or47.,as the case.may tions in timed;sequence.

’With the above -and other objects in view, my •invention -resides in the novel features of form, construction, arrangement, and combination of •parts-presently -described &lt;and pointed out in The blaims.

In the-accompanying-drawing—

Figure 1 -is-a front-sectional view of a dishwaShing -machine-constructed in-accor dance -with and embodying the present invention;

Figure 2 is a sectional view taken along lines 2—2 of Figure 1; and

Figures 3 and 4 are fragmentary-sectional views taken along lines 3—3 and 4—:4, respectively, of Figure 2.

Referring-now in more-detail and by reference characters to the-drawing·which illustrates apreferred embodiment of The -present invention, A designates a dishwashing machine comprising a be,,and into one or other,of two supply .tanks SO, _3g 21, into which the drain valve .17 opens Through The .ports 47', 47,respectively, .said tanks.20, 31, being [Provided.inThe.battom.portion· of the cabinet I by the -division thereof by a centrally disposed transversely.extending wall. 22.

Adjacent the .rearward end of the drain valve 17, the riser 14 is connected to a double check valve .23., in horizontal alignment with the drain valve 17 and-provided with a deflector or flapper member 24 (mounted on the forward end of the rock shaft ( 9 Which extends through the valve 23 and is journaled in the- walls thereof. It will thus be seen that the deflectors 18, 24, will, upon rotation of The rock shaft 19, swing in unison in the same direction.

of the valve 23 are pipes or -risers 25, 26, which -extend downwardly into the supply tanks 20, 21, respectively. Each of said pipes 25, 26, is connected atits-lower ?end to =pumps 27,28, preferably of the centrifugal type, which are supported upon •45

Communicating with each side cabinet -I, preferably -rectangularly -shaped, and supported at its lower corners by ’legs 2. The

-upper .portion of the cabinet ! is-adapted to «provide an -enclosed 'Chamber «3 having a pair of

Transversely-extending-parallel Tracks 4,-4', ’fabricated of angle iron and 'communicating -at 65 the bottom wall of-the cabinet I and are each re·

2,575,493 spectively connected by belts 29, 39 to unidirectional drive-clutches 3i, 32, directly on the shaft of an electric reversible motor 33. The clutches 31, 32, are arranged oppositely to each other so that when the motor 33 is running in one direc- ; tion the clutch 3f will transmit movement and the clutch 32 will not and conversely when the motor 33 is running in the other direction the clutch 32 will transmit motion and the clutch 3' will not. Preferably, the electric motor 33 should I be disposed within a water-tight compartment 34 . provided beneath the tank 21 in the base of the cabinet I.

Disposed within the tank 29 for maintenance of the level of fluid therein is an upstanding over- I flow pipe 25 connected at its lower end to a drain 36 in the base of the cabinet I. : , rt rt

A conventional timing switch 37 is. provided for cyclically reversing direction of the motor 33 for alternate engagement of the pumps 27, 23 in ί timed sequence.

In operation, the tanks 20, 2 ί, are respectively supplied with a quantity of washing solution of requisite detergent strength and chemically treat- . ed rinse water. The tray 7 of soiled tableware i 7' is then moved, as by pushing, along the table 5 through the door 6 and into the chamber 3 whereupon the doors 6, 6', are closed, the motor 33 started by setting the switch 37 at its central position. The motor 33 will rotate in such di- &lt; rection as will cause motion to be transmitted through the clutch 3i for actuation of the pump 27 whereby washing solution is forced upwardly through the pipe 25 and into the valve 23. If the deflector plate 24 is disposed blockingly across ‘ the side of the valve 23 communicating with the upper end of the pipe 25, the force with which the washing solution is being impelled upwardly will cause the deflector plate 24 to be swung away from the pipe 25 and into closure-wise disposition ^!across the upper end of the pipe 26. Thereby opening the valve 23 for the washing solution and simultaneously preventing any of the washing solution from entering the tank 2S through the pipe 26. Upon such swinging movement of ' the deflector 24, the deflector (8 of'the drain valve 17 will be correspondingly swung into position across the port 17 thereof, thus directing drain fluid back into the tank 20 and preventing any flow into the tank 21. The washing solution will ¹continue its course upwardly through the riser 14, along the manifolds 12, 13, thence along the pipes 8, 9, and outwardly onto the tableware through the orifices 10, II. The washing solution will drain downwardly, onto the drain pipe ¹16, thence into the valve 17 and will flow through the port 17” for return to its tank of origin 29. Thus, it will be seen that throughout the entire operation none of the washing solution entered . the tank 21 for dilution and contamination of * the rinse water.

The washing cycle continues for the selected .. interval to which the timing mechanism cf the switch 37 is set and upon the completion of such ₍interval the switch 37 will automatically reverse . the motor 33, thereby causing the clutch 31 and its associated pump 27 to stop. At the same time the clutch 32 and its associated pump 23 starts rotating, forcing rinse water upwardly, through ' the pipe 26, causing the deflector 24 to swing in

-the opposite direction for effectively blocking the , opening to the upper end of the pipe 25. Simultaneously, the deflector 18 is swung closure-wise across the port 17', whereby, the rinse, water,.

upon drainage, will be directed back into its tank of origin 21.

The rinsing cycle will continue, in turn, for the selected interval to which the switch 37 is set, ί and at the completion of such interval the motor 33 will be shut off entirely. The tray 7 may then be pushed outwardly through the opposite door 6' and the dishes allowed to drain. The chamber 3 is, of course, now ready to receive another tray0 ful of dirty dishes for a subsequent Wishing and rinsing operation.

If desired, the motor 33 may be operated manually for alternate engagement of the pumps 27, 28.

Thus it will be seen that throughout continued usage of the machine A the solutions will be kept totally-distinct without any danger of impairment of their respective strength by admixture with the other.

It should be understood that changes and modifications in the form, construction, arrangement, and combination of the several parts of the dishwashing machine may be made and substituted for those herein shown and described 5 without departing from the nature and principle cf my invention.