US3020917A

US3020917A - Dishwashing machine wash and rinse fluid discharge apparatus

Info

Publication number: US3020917A
Application number: US774771A
Authority: US
Inventors: Homer F Lyman
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-11-18
Filing date: 1958-11-18
Publication date: 1962-02-13
Anticipated expiration: 1979-02-13

Description

Feb. 13, 1962 H. F. LYMAN 3,020,917

DISHWASHING MACHINE WASH AND RINSE FLUID DISCHARGE APPARATUS Filed Nov. 18, 1958 2 Sheets-Sheet 1 INVENTOR HEIMER' F. I YMANy Feb. 13, 1962 H. FA I YMAN 3,020,917

DISHWASHING MACHINE WASH AND RINSE FLUID DISCHARGE APPARATUS Filed Nov. 18, 1958 2 Sheets-Sheet 2 E 4 I "/4 INVENTOR HDMER F. LYMAN United States Patent fltce 3,020,917 yPatented Feb. 13, 1962 3,020,911 DISHWASHING MACHINE WASH AND RINSE FLUID DISCHARGE APPARATUS Homer F. Lyman, 44 Windsor Place, Nutley, NJ. Filed Nov. 18, 1958, Ser. No. 774,771 Claims. (Cl. 134-58) This invention relates to cleaning apparatus wherein an article to be cleaned is subjected to a cleaning fluid in at least two successive spraying cycles, and more particularly to dishwashing apparatus which operates in a wash cycle and in a rinse cycle.

The present invention broadly contemplates novel cleaning apparatus wherein a cleaning fluid employed in one spraying cycle is collected for recirculation in a subsequent spraying cycle, and a cleaning uid employed in a spraying cycle following the said one cycle is prevented from coming into admixture with the collected fluid, and is discharged to waste.

In the application of the present invention to dishwashing apparatus which operate in a wash cycle and in a rinse cycle, the wash liquid is sprayed onto the dishes during the wash cycle and is collected for recirculation in a subsequent wash cycle. The rinse liquid used in the succeeding rinse cycle is prevented from mixing with the collected wash liquid and is conducted to waste.

The dishwashing apparatus of the present invention comprises a casing having a cleaning chamber and rack means therein for accommodating the dishes to be cleaned. Wash spray pipes and rinse spray pipes are disposed in the cleaning chamber and serve to spray the dishes with wash liquid and rinse liquid during the wash cycle and rinse cycle, respectively. The wash` liquid collects in a wash liquid compartment, disposed below the cleaning chamber, and means are provided for recirculating the collected wash liquid to the wash spray pipes in a subsequent wash cycle. In order to prevent admixture of the rinse liquid with the wash liquid to be recirculated, and dilution of the latter, a rinse drain compartment connected to waste is provided. Novel deflection means are disposed above the wash liquid compartment for intercepting the rinse liquid during the rinse cycle so as to deflect the rinse liquid away from the wash liquid compartment and to' the rinse drain compartment, where the rinse liquid is conducted to waste.

The invention will -be understood from the following description when considered in connection with the accompanying drawings forming a part thereof and in which: Y

FIG. l is an elevational View, in perspective, of a dishwashing apparatus embodying the present invention;

FIG. 2 is a part sectional view ofthe dishwashing apparatus shown in FIG. l and is taken along the line 2 2 of FIG. 3;

FIG. 3 is a sectional view taken along the line 3-3 of FIG. 2; and

FIG. 4 is an enlarged diagrammatic view, in perspective of the pivotal tray member shown in FIGS. 2 andl 3V together with the actuating` means therefor.

Referring to FIG. l of the drawings, the reference numeral lll designates a casing Whichis substantially rectangular in cross-section. .The casingll comprises

opposite side walls

12 and 13, frontwall 14 and rear wall 15 (shown in FlG..3), a top or hood 16 and a bottom 17. The upper portions of

side walls

12 and 13, and front wall 14 are provided with

doors

18, 19 and. 20,. respectively and handles 21, the `doors being slidable' upwardly to obtain access to the yinterior of the upper portion of casing 11. L-shaped corner members .22 are provided at the corners of the upper portion of Vcasing 11 and serve as slide guides for the

doors

18, 19 and20.` The movement of the doors downwardly is limited by L- shaped angle bars 23 (FIG. 2) and the lower edges of the doors are restrained from movement inwardlyA of the casing by restraining plates 24 (FIG. 2) secured to angle bars 23 by threaded members 25.

f Casing 11 is provided with a cleaning chamber or washing and rinsing chamber 27 in the upper part thereof and with a wash liquid compartment 29 immediately below the cleaning chamber and in the lower portion of the casing. A dish rack supporting table 30 disposed intermediate the top and bottom of cleaning chamber 27 and mounted for reciprocal movement in a horizontal plane is provided. Table 30 comprises a pair of parallel and inverted angle bars 31 and 32 (FIG. 2) which extend in directions parallel to

side walls

12 and 13, and a pair of parallel angle bars 33 extending in directions parallel to front and rear walls 14 and 15, the angle bar 33 nearer the front wall not being shown in the drawings. Angle bars 33 have a horizontal portion 34 which is bent downwardly at either end and a vertical portion 35 at right angles to portion 34. Vertical portions 35 serve to restrain lateral movement of a dish rack 36 which rests on the horizontal portions of

angle bars

31, 32 and 33.

Angle bars

31, 32 and 33 are secured to each other in any suitable manner, as by welding, and form a rigid table for the dish rack 36. Angle bars 31 and 32 extend slightly beyond the angle bars 33, to form an extending portion at each corner of table 30 and such extending portions have secured thereto U-shaped threaded eye members 38, by nut members 39. The eye members 38 -accommodate end curved portions of vertical supporting rods 40 which havecurved portions at their other ends engaging U-shaped threaded eye members 41 secured to a top frame member 42 by nut members 43.

Actuating means for imparting reciprocable movement to table 30 in a horizontal plane within cleaning chamber 27 is provided. The actuating means to be described hereinafter does not form part of the present invention but is disclosed herein to provide a complete understanding of the washing operation of the subject dishwashing apparatus. The actuating means is fully disclosed and claimed in applicants U.S. Patent No. 2,655,163 issued October 13, 1953, and for that reason only that portion necessary to an understanding of the present invention has been illustrated in FIG. 2 of the drawings and is to be described hereinafter. As shown in FIG. 2, the actuating means comprises a gravity water wheel 44V revolubly mounted on an axis v45 which is secured to rear wall 15 of casing 11 substantially equi-distant between

side walls

12 and 13. Water wheel 44 has a central disc or hub 46 secured to axle 45 for rotation therewith. Disc 46 has a crank pin 47 eccentrially mounted thereon which cooperates with an elongated slot 48 in a vertically extending actuating arm 49. Actuating arm 49 is secured in an upright position to angle bar 33, nearer rear wall 15, substantially mid-way between the opposite ends thereof. Crank pin 47 is of such diameter that the peripheral surface thereof slidably engages the opposite' sides of slot 4S.

As shown in FIG. 2 water wheel 44- has a plurality of buckets 50 of substantially square shape, all facing in the same direction, and carried by radial arms 51 secured to disc 46. Water wheel 44 is actuated bywash liquid from wash liquid compartment 2.9, which flows through a connecting pipe (not shown) to a` conduit 52. (partly shown) having outlet nozzle 53 `and' 54 disposed immediately above buckets Si). Nozzles 53 and 54 are arranged to discharge jets of liquid downwardly into buckets 50'y so as to rotate water wheel 44 in a clockwise direction` `as seen ,in FIG. 2'. Movement ofwheel 44 rotates crank pin 47 in a clockwise direction ycausing the pin to move against Athe right side (FlG.,2) of ,slot 43 in arm. 49. This moves arm 49 yand table 30 to which it is attached to the right of FIG. 2. As the crank pin 47 passes its lower-most position in slot 48 it bears against the left side of each slot and causes the arm 49 and table 30 to reverse its movement and move to the left of FIG. 2. When the pin 47 passes its uppermost position in slot 48 it again bears against the right side of the slot. In this manner, reciprocal movement is imparted to table 30 and dish rack 36 as wheel 44 rotates.

Wash liquid compartment 29 has a bottom plate 56 which is secured to the casing 11 in a tluid type manner and at the top of said compartment is a shelf-like support member 57 (FIGS. 2 and 3) which is secured to casing 11 along front and rear walls 14 and 15 and along side wall 12. Support member 57 is notched at the ends adjacent side Wall 13 (FIG. 3) to accommodate an elongated box-like compartment 58 extending along side wall 13, and which compartment serves as a rinse liquid drain compartment as will be more fully explained hereinafter. Drain compartment 58 comprises a top 59 and a bottom 60 (FIG. 2) which extend in planes parallel to the plane of support member 57 and includes vertical front `and rear walls 68a and 68h (FIG. 4) which extend transversely of vertical side walls 61 and 62 (FIG. 2). Bottom 60 has connected thereto a conduit 63 which, in turn, is connected to waste (not shown). Side wall 61 has a horizontal flange-like support member 64 which is coplaner with support member 57 and together such members support a perforated strainer pan 65.

The washing uid or liquid in wash liquid compartment 29 generally comprises a solution of soap and water, and an overow pipe 66 is provided so that the fluid in the compartment will not exceed a predetermined level. A strainer block 67 in compartment 29, on bottom plate 56 is connected to a pipe 68 which, in turn, connects with the suction side of a motor-driven pump 69 (partly shown) in a motor-pump compartment 7i) of casing 11. A switch 70a (FIG. l) is connected in circuit with the electrical motor (not shown) driving pump 69 and serves to connect and disconnect the motor from its power supply. The Wash liquid discharged from pump 69 ilows into a discharge pipe 71 and a branch pipe 72. Pipe 71 is connected to a manifold 73 in cleaning chamber 27, below table 30, which supplies a feed distributor pipe 74 with the wash liquid from compartment 29. Distributor pipe 74 extends parallel to front and rear walls 14 and 15 and has connected thereto a plurality of laterally spaced wash liquid spray pipes 75 which extend normal to the pipe 74 and have spraying orifices therein. A revolving rinse liquid arm 77 is rotatably carried on manifold 73 and is supplied with rinse liquid through conduit means (not shown) connected to a source of rinse liquid (not shown). Arm 77 is balanced to rotate under a predetermined ilow pressure of rinse liquid and provides a revolving liquid spray. Branch discharge pipe 72 is connected to supply an upper wash spray pipe arrangement above table 30 identical with that disclosed below the table. A manifold 78 communicates with pipe 72 and is connected to a feed distributor pipe 78A which, in turn, is connected to laterally spaced spray pipes 79. A second revolving rinse liquid arm 80 is rotatably carried by manifold 78.

The subject dishwashing apparatus is operable in a wash cycle and a rinse cycle whereby the dishes are sprayed by wash liquid or water to wash the same during a predetermined period of time, and after a short interval of time the dishes are sprayed with rinse liquid or water for another predetermined period of time. In dishwashing apparatus of the kind disclosed herein the cleaning power of the Wash liquid is not completely depleted in one washing cycle and therefore it is recirculated for use in a subsequent wash cycle. However, in conventional dishwashing apparatus, a disadvantage exists that the liquid used is collected in admixture with the wash liquid to be recirculated and consequently, the wash liquid is diluted. The present invention overcomes this and other disadvantages of prior dishwashing apparatus in providing novel means to maintain the wash liquid and the rinse liquid, after being sprayed onto the dishes to be cleaned, separate whereby wash liquid substantially undiluted by rinse water may be recirculated in subsequent washing cycles. To this end, a trip tray 82 (FIG. 2) is provided in cleaning chamber 27 immediately above wash liquid compartment 29. Tray 82 is substantially square and is provided -along opposite edges, extending parallel with front and rear walls 14 and 15, with upstanding wall portions 83 and 84. Tray 82 has an edge 85 which together with part of wall portions 83 and 84 extend into a space between the upper edge of side wall 61 (FIG. 2) of rinse drain compartment 58 and the top 59. The edge of tray 82, opposite edge 85, is designated by the numeral 86 and is in proximity to side wall 12 of casing 11; edges 8S and 86 serve as fluid flow discharge ends, as will be brought out presently. Top 59 of rinse drain compartment 58 is provided with a pair of slots 87 to accommodate the wall portions 83 and 84 extending into the compartment 58. A rod 88 is secured to the bottom of tray 82, mid-way of edges and 86, in any suitable manner, as by welding, and the ends of the rod are accommodated within slots 89 formed in holding brackets 90 mounted on shelf-like supporting member 57 to pivotally mount the tray.

Actuating means is provided to tilt or pivot tray 82 in opposite directions about rod 88 as a pivot. The actuating means comprises a vertically extending rod 91 which is secured at its lower end to wall portion 84 of tray 82 (FIG. 4) adjacent edge 86, by a locking member 92. The upper portion of rod 91 extends through top frame member 42 and into the space within hood 16 where it is bent substantially at a right angle for insertion into a slot 93 formed in an actuating lever 94, adjacent one end thereof. Actuating lever 94 is provided at its mid-point with a pivot pin 95 mounted in a support 96 secured to frame member 42. The other end of actuating lever 94 has secured thereto, by a pin 97, an armature 98 of a conventional armature spring-biased solenoid 99. As is well understood to those skilled in the art, the solenoid here under consideration includes an armature which is urged out of the solenoid core by a spring when the solenoid is deenergized, and upon energization of the solenoid the armature is drawn into the core against the action of the spring. Movement of armature 98 in a direction into the core is limited in its travel by a stop on the armature. Considering now the operation of the tray actuating mechanism, when solenoid 99 is energized armature 98 moves downwardly (FIG. 4) into the core and thereby rotates lever 94 in a clockwise direction about pivot pin 95. As a result, rod 91 is moved upwardly to pivot tray -82 in a clockwise direction about rod 88 as a pivot, and movement of the tray in that direction is limited by engagement thereof with the upper edge of side wall 61 of rinse drain compartment 58 and by stop 100 on armature 98, the arrested position of the tray being shown in broken lines in FIG. 2. When solenoid 99 is deenergized, lever 94 and tray 82 are moved in counterclockwise directions by armature 98 and rod 91, respectively. The movement of tray 82 is arrested by engagement of edge 85 with top 59 of rinse drain compartment 58 so that the tray assumes the full line position shown in FIG. 2.

In operation, door 18 is moved upwardly and dish rack 36 having dishes therein is positioned on table 30; thereafter door 18 is moved downwardly. If it is desired to operate the dishwashing apparatus in a wash cycle solenoid 99 is maintained in a deenergized condition, whereby the tray actuating mechanism and the tray 82 assume the positions shown in FIG. 4 and the tray (in FIG. 2) the full line position. Switch 70a is then actuated to energize the motor (not shown) driving pump 69, whereby wash liquid from wash liquid compartment 29 is delivered by pump 69 through discharge pipes 71 and 72 to upper and lower wash spray pipes 79 and 75. The washing liquid is projected upwardly through the spray orifices in pipes 75 in a plurality of streams passing upwardly through the dish rack 36 and over dishes therein while the wash liquid from spray pipes 79 is directed downwardly over the dishes in rack 36. The streams of wash liquid are under sufficient pressure to cause the foreign substances on the dishes to be washed therefrom. During the washing operation described, wash liquid from wash liquid compartment iiows through conduit 52 and nozzles 53 and 54 to rotate water-wheel 44 to impart reciprocable movement of table and rack 3 6 transversely of the washing streams of liquid.

The Wash liquid from the wash spray pipes 75 and 79 and from water wheel 44 flows downwardly toward the wash liquid compartment 29 for collection therein. As may be seen in FIG. 2, tray 82 is in the path of flow of the downwardly flowing wash liquid and in the position shown serves to intercept same and deflect the liquid toward wall 12 of casing 11. The edge 86 of tray I32 is spaced from support member 57 whereby the deflected wash liquid flows over edge 86 and through said space and over strainer pan 65, where the liquid passes therethrough for collection in wash liquid compartment l29. lt will be seen that the possibility of wash liquid entering rinse drain compartment 58 is slight inasmuch as the tray is tilted away from compartment 58 and the tray edge 85 is in engagement with top 59 of the rinse drain compartment.

When it is desired to operate the subject d ishwashing apparatus in a rinse cycle, after or before the wash cycle, solenoid 99 is energized through circuitry (not shown) whereby armature 98 is drawn into the core of the solenod to effect pivotal movement of the tray member 82 to the broken line position shown in FIG. 2. Rinse liquid is then caused to flow through conduit means (not shown) to revolving rinse arms 77 and 80 whereby whirling sprays of rinse liquid are projected onto the dishes in rack 36, both from above and below the rack. The rinse liquid after passing over the dishes flows downardly and is intercepted by tray 8 2 and deflected or directed toward wall 13 of casing 11 and rinse drain compartment 58. The rinse liquid flows over edge 85 of tray 82 and through the space between top 59 ,and the upper edge of vertical wall 61. The rinse liquid entering compartment 5 8 is then conducted to waste through drain conduit 63. After the washing and rinsing cycles the door 19 is lifted and the rack 36 along with the clean dishes is removed.

It will now be apparent that the present invention provides novel cleaning or `dishwashing apparatus whereby means are provided for preventing admixture of the wash liquid to be reused or recirculated and the rinse liquid which is to ,be .discharged Ato waste. By employing the tiow deliection means .of the present invention to intercept the wash liquid and rinse liquid after they have been sprayed onto the dishes, Atogether with the structure cooperating therewith, .an Veffective Vdishwashing apparatus is provided which effects an important advantage of preventing dilution of the wash liquid to be recirculated for reuse.

In the foregoing description and in the claims to follow the term cleaning fluid is employed to define either wash liquids or rinse liquids so as to broadly cover liuids usable in the cleaning apparatus of the subject invention.

Although one embodiment of the invention has been illustrated and described in detail it is to be expressly understood that the invention is not limited thereto. Various changes can be made in the design and arrangement of the parts without departing from the spirit and scope of the invention as the same will now be understood by those skilled in the art.

What is claimed is:

l. ln article cleaning apparatus of the class described which operates in a wash cycle and a rinse cycle, a vertically disposed casing having a cleaning chamber, rack 6 means hsrilontally dispssed in ,Said defining Chamber .fsf accommodating an article to be cleaned, wash spray means for spraying awash liquid onto the article to be cleaned during the wash cycle, rinse spray means for spraying a rinseliquid onto the article to be cleaned during the rinse cycle, a wash liquid compartment in said casing and disposed below the cleaning chamber, said wash liquid compartment having a substantially horizontal top with a portion thereof perforated and in communication with the cleaning chamber to permit liow of wash liquid into said wash liquid compartment for collection therein, a substantially fiat tray member horizontally arranged in said cleaning compartment above the perforated wall portion of said wash liquid compartment for intercepting ilow of liquid after the liquid is sprayed onto the article to be cleaned, pivot means for said tray member to permit the latter tov pivot in two directions about a horizontal pivot axis extending transversely of the cleaning charnber, said tray member having upstanding walls along the parallel edges extending transversely of the pivot axis of said tray member to constrain flow of liquid off the tray member at oppositely disposed edges thereof extending parallel to the pivot axis -of thetray member, an elongated box-like compartment dening a rinse drain compartment arranged along one of the oppositely disposed edges of the tray member, said rinse drain compartment having vertical side walls disposed parallel to the pivot axis of the tray member and vertical end walls extending transversely of the pivotal axis, one of the vertical side walls of said rinse drain compartment being spaced from the top lthereof to define an inlet in communication with the cleaning chamber and accommodating said one oppositely disposed edge of the tray member and portions of the upstanding walls of the said parallel edges extending transversely of the pivot axis, the top` of the rinse drain compartment adjacent said one vertical side wall of the latter having a pair of slots therein to accommodate movement of the said upstanding walls of the tray member within 4the rinse drain compartment, the top of said rinse drain compartment serving -to limit movement of said tray in one direction and the upper spaced edge of said one vertical side wall of the drain compartment serving to limit movement of the tray in the other direction, actuating means connected to the tray member vfo-r pivoting the latter in the two ldirections, said actuating means being adapted to pivot the tray member in said one direction during the wash cycle whereby wash liquid iiows olf of the vtray member at lthe other of said oppositely disposed edges and passes through the perforated portion of the top of the wash Aliquid ompartment, and being adapted to pivot the tray member in said other direction during the rinse cycle whereby the rinse liquid liows off the tray member at said one oppositely disposed edge of the tray member into the drain compartment, and means in communication with the Wash'liquid compartment and the wash spray for recirculating the wash liquid' to the wash spray means.

2. The article cleaning apparatus of claim 1 wherein the actuating means comprises a solenoid actuated rod connected at the end remote from the solenoid to the tray member adjacent said other oppositely disposed edge of the tray member.

3. The larticle cleaning apparatus `of claim l wherein the top of said wash liquid compartment -consists of a shelf-like member arranged on and extending from the wall of the casing containing the cleaning chamber and on the said one vertical side wall of the box-like rinse drain compartment; and the perforated portion of the top of said wash liquid compartment having an adjustable strainer pan supported on said shelf-like member.

4. In article cleaning apparatus of the class described which operates in a wash cycle and a rinse cycle, a casing having a cleaning chamber, means in said cleaning chamber for accommodating an article to be cleaned, wash spray means for spraying a wash liquid onto the article to be cleaned during the Wash cycle, rinse spray means for spraying a rinse liquid onto the article to be cleaned during the rinse cycle, a wash liquid compartment in the casing arranged below the cleaning chamber for receiving the wash liquid from said chamber, a rinse drain compartment disposed below the cleaning chamber and adjacent the wash liquid compartment, said rinse drain compartment having an inlet above the wash liquid compartment and in the cleaning chamber and an outlet connected to waste, the wash liquid and the rinse liquid in said cleaning chamber ilowing downwardly toward the wash liquid compartment and rinse drain compartment after being sprayed onto the article to be cleaned, a substantially at tray member horizontally arranged in the cleaning compartment and so `as to intercept ow of liquid after the liquid is sprayed onto the article to be cleaned, pivot means for said tray member to permit the latter to pivot in two directions about a horizontal pivot axis extending transversely of the cleaning chamber, said tray member having upstanding sides along the parallel edges extending transversely of the pivot axis of said tray member to constrain ow of liquid off the tray member at oppositely disposed edges thereof extending parallel to the pivot axis of the tray member, an elongated box-like compartment defining a rinse drain compartment arranged along one of the oppositely disposed edges of the tray member, said rinse drain compartment having opposite side walls, opposite end Walls, a top and a bottom, one of the side walls of the rinse drain compartment being spaced from the top thereof to define an inlet in communication with the cleaning chamber and arranged to movably accommodate said one oppositely disposed edge of the tray member and portions of the upstanding sides of the parallel tray member edges extending thereinto and transversely of the pivot axis, the top of the rinse drain compartment serving to limit movement of said tray in one direction and the upper spaced edge of said one side wall ofthe rinse drain compartment serving to limit movement of the tray in the other direction, and actuating means connected to the tray member for pivoting the latter in the two directions, said actuating means being adapted to pivot the tray member in said one direction during the wash cycle whereby Wash liquid ows E of the tray member at the other of said oppositely disposed edges and passes into the wash liquid compartment and being adapted to pivot the tray member in said other direction during the rinse cycle whereby the rinse liquid ilows off the tray member at said one oppositely disposed edge of the tray member into the drain compartment.

5. In article cleaning apparatus of the Class described which operates in a wash cycle and a rinse cycle, a casing having a cleaning chamber, means in said cleaning chamber for accommodating an `article to be cleaned, wash spray means for spraying a wash liquid onto the article to be cleaned during the wash cycle, rinse spray means for spraying a rinse liquid onto the article to be cleaned during the rinse cycle, a wash liquid compartment in the casing arranged below the cleaning chamber for receiving the wash liquid from said chamber, a rinse drain compartment disposed below the cleaning chamber and adjacent the wash liquid compartment, said rinse drain compartment having an inlet above the wash liquid compartment and in the cleaning chamber and an outlet connected to waste, the wash liquid and the rinse liquid in said cleaning chamber iiowing downwardly toward the wash liquid compartment and rinse drain compartment after being sprayed onto the article to be cleaned, a substantially at tray member horizontally arranged in the cleaning compartment and so as to intercept flow of liquid after the liquid is sprayed onto the article to be cleaned, pivot means for said tray member to permit the latter to pivot in two directions about a horizontal pivot axis extending transversely of the cleaning chamber, said tray member having upstanding sides along the parallel edges extending transversely of the pivot axis of said tray member to constrain flow of liquid oi the tray member at oppositely disposed edges thereof extending parallel to the pivot axis of the tray member, an elongated box-like compartment defining a rinse drain compartment arranged along one of the oppositely disposed edges of the tray member, said rinse drain compartment having vertical side walls disposed parallel to the pivot axis ofthe tray member and vertical end walls extending transversely of the povtal axis, one of the vertical side walls of said rinse drain compartment being spaced from the top thereof to define an inlet in communication with the cleaning chamber and accommodating said one oppositely disposed edge of the tray member and portions of the upstanding sides of the said parallel edges extending transversely of the pivot axis, the top of the rinse drain compartment adjacent said one vertical side wall of the latter having a pair of slots therein to accommodate movement of the said upstanding sides of the tray member within the rinse drain compartment, the top of said rinse drain compartment serving to limit movement of said tray in one direction and the upper spaced edge of said one Vertical side wall of the drain compartment serving to limit movement of the tray in the other direction, and actuating means connected to the tray member for pivoting the latter in the two directions, said actuating means being adapted to pivot the tray member in said one direction during the wash cycle whereby wash liquid ows oli of the tray member at the other of said oppositely disposed edges and passes through the perforated portion of the top of the wash liquid compartment and being adapted to pivot the tray member in said other direction during the rinse cycle whereby the rinse liquid flows oi the tray member at said one oppositely disposed edge of the tray member into the drain compartment.

References Cited in the file of this patent UNITED STATES PATENTS 512,683 Cochrane Jan. 16, 1894 1,690,449 Jourdan Nov. 6, 1928 2,025,592 Kelly Dec. 24, 1935 2,508,999 Hirsch May 23, 1950 2,729,219 Smith Jan. 3, 1956 FOREIGN PATENTS 77,898 Netherlands Apr. 15, 1955