US2563109A

US2563109A - Dishwasher tub and spray nozzle construction

Info

Publication number: US2563109A
Application number: US664443A
Authority: US
Inventors: Ray W Franklin
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-04-24
Filing date: 1946-04-24
Publication date: 1951-08-07
Anticipated expiration: 1968-08-07

Description

g- 7, 1951 R. w. FRANKLIN 2,563,109

DISHWASHER TUB AND SPRAY NOZZLE CONSTRUCTION Filed April 24, 1946 3 Sheets-Sheet 1 fal.

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Aug. 7, 1951 R. w. FRANKLIN 2,563,109

DISHWASHER 'ru AND SPRAY NOZZLE CONSTRUCTION Filed A ril 24, 1946 s Sheets-Sheet :5

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Patented Aug. 7, 1951 OFFICE DISHWASHER TUB AND SPRAY NOZZLE CONSTRUCTION Ray W. Franklin, Chicago, 111.

Application April 24, 1946, Serial No. 664,443

This invention relates to dishwashers and particularly to tub constructions therefor.

It is an object of the present invention to provide a dishwasher tub of moderate size and price which can be used to advantage both in homes and in commercial establishments. Another object of the invention is to provide such a tub construction of sheet metal stampings, which, when assembled, presents a unitary appearance and is, in efiect, a unitary article.

A further object is the provision of a unitary construction, as mentioned above, which can be simply mounted in and supported by difierent kinds of stands or cabinets to suit the desires of diii'erent users.

Still another object is the provision of a tub construction made from sheet metal stampings, which presents the least liability to leaking.

The tub is so constructed also that certain parts are easily disassembled for cleaning purposes. The wash water from dishwashers becomes Iull oi sediment, and in passing through certain passages, the tendency is for it to become clogged in these passages. In my construction, however, critical parts can be easily removed for cleaning out this sediment.

Specifically, the construction includes a shallow main bottom and a surrounding side wall secured to and extending upwardly from the peripheral margin thereof. A sub-bottom is secured to the underside of the main bottom, entirely enclosing it, and extending partially up the side of the tub.

The sub-bottom has stamped therein a center impeller well and channels communicating with the impeller well. which lead therefrom outwardly and upwardly. Channel forming strips are secured to the side wall, continuing the channels upwardly where they communicate with the interior oi. the tub adjacent the top thereof.

Additional channels are formed in the subbottom which communicate with the impeller well, and lead outwardly and communicate with the interior of the tub through the bottom thereof. Spray units are here attached for directing wash water onto the dishes from the bottom.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims. and illustrated in the accompanying drawings, in which:

Fig. 1 is a plan view of a washer tub embody ins my invention, with the cover removed;

9 Claims. (Cl. 134-148) Fig. 2 is a vertical sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is a side view of one of the strips secured to the outer surface of the tub for forming vertical wash water flow channels therewith;

Fig. 4 is a sectional view taken on line 4-4' of Fig. 3;

Fig. 5 is a sectional view taken on line 5-5 of Fig. 3;

Fig. 6 shows an insert to be used where the vertical channels enter the interior of the tub;

Fig. 7 is a plan view of the dome covering the impeller well in the bottom of the tub;

Fig. 8 is a bottom view of the dome of Fig. 7;

Fig. 9 is a view taken on line 99 of Fig. 4;

Fig. 10 is a view taken on line ill-10 of Fig. 1;

Fig. 11 is a view taken on line llll of Fig. 10;

Fig. 12 is a view taken on line i2--I2 of Fig. 11; and I Fig. 13 is a reduced perspective view of the finished tub in place in a stand or cabinet.

Referring now in detail to the drawings, the tub as a whole isindicated at 12, and it is shown supported by a stand or cabinet Hi. The tub in this instance is circular, and for supporting it in the stand M, a plurality of U-shaped brackets l6 are welded to the tub and to the stand. The brackets iii are of diiierent sizes for positioning the tub in the stand to provide space in the stand for an operating motor (not shown).

The tub 12 includes a main shell l3 which comprises a main bottom 20 and a surrounding side wall 22. The main bottom 20 is a generally flat surface 2 provided with a large central opening 26 and an upturned peripheral extension 28.

The side wall 22 is formed of a flat piece of sheet metal and rolled to provide a cylindrical shape and fitted in the inner surface of the head it formed at the upper margin of the upturned periphery 28. These parts are then spot welded at intervals therearound, and the seam between the two parts soldered to prevent leakin of the wash water from the tub.

Secured to the under-surface of the main shell I8 is a sub-bottom 32 havin a central generally fiat surface 34 and an upturned peripheral wall 36. The sub-bottom 32 is in general the shape of the main bottom 28, but contains formations varying from its general shape. ,The upturned peripheral wall 36 of the sub-bottom 32 terminates just below the bead 30, and the peripheral wall 36 is spot welded to the peripheral wall 28 at certain points therearound for securing them solidly together. The seam between these parts is then soldered to prevent leaking.

The sub-bottom 32 before applying it to the tub is stamped to provide a center well 38 for the reception and operation of an impeller 48. The sub-bottom 32 is also provided with a plurality of radially extending troughs or open channels 42, communicating with and leading from the center well 38 and continuing outwardly and then upwardly along the upturned peripheral wall 36. These troughs or channels 42 are stamped downwardly in the sub-bottom 32, and have their open sides next to the surface 24 of the main bottom 28 to form closed channels in conjunction therewith.

Channel forming strips 44 which are also stamped and have flanges 46 formed thereon, are secured to the outer surface of the side wall 22 and communicate with the upper extremity of the channels 42 as shown in Figs. 3 and 4 at 48. Likewise, these channel formin strips 44 are spot welded to the side wall 22 at certain points, and the seam soldered. The strips 44 extend upwardly adjacent the top of the side wall 22 where openings 58 are formed in the side wall 22. The openings 58 are stamped and inwardly offset flanges 52 are formed along their marginal edges. The vertical dimension of the openings 58 is greater than that necessary for the passage of suflicient wash water, and to reduce the area of these openings, inserts 54 are employed. The inserts 54 are formed with reduced openings 56, and baflies 58 formed above such openings 56, the baffles being directed inwardly and downwardly.

The dome 68 is secured to the bottom of the tub and covers the opening 26 in the main bottom 28. Openings 62 are punched in the dome 68 for forming shields 64. The openings 62 permit sufficient wash water to pass therethrough, and the shields 64 prevent objects such as silverware from falling through the openings 62. The dome 68 comprises a plate 66 having a central opening 68 and a flange "I extending upwardly from the margin of the plate 66 and flaring outwardly at its upper edge. An inner shell 12 is fitted on the inner surface of the flange I8 forming the complete dome. Centrally of the dome 68 is an upwardly extending sleeve 14 having a central opening for the insertion of the shaft I3 of a basket I for holding the dishes to be washed. This basket forms no part of the present invention and accordingly only a small portion there-- of is shown. The shaft I3 fits loosely in the sleeve 14, so that the basket can be rotated; any desired means may be employed for rotatin the basket.

Secured to the lower edge of the flange I8 is a plurality of ears I6, each having a keyhole slot 18 therein. The cars I6 are secured to the flange 18 by means of welding, and are spaced circumferentially around thedome 68. A plurality of shouldered rivets 88 are secured to the flat surface 24 of the main bottom 28 at points to cooperate with the keyhole slots 18 in the ears 16. The rivets 88 have enlarged heads on their upper ends, and the shoulders, being in engagement with the surface 24, space the enlarged heads of the rivets above the surface 24. To secur the dome 68 in place, it is inserted in the tub with the rivets passing through the enlarged portions of the slots I8, and then turned so that the enlarged heads of the rivets 88 fit over the narrower portions of the slots I8 in a well known manner.

In addition to the channels 42 formed in the sub-bottom 34, a plurality of additional, supplementary channels are formed therein in the spaces between the channels 42. These channels are indicated at 82 and communicate with the center well 38 similarly to the channels 42, and extend radially outwardly wher they terminate a short distance beyond the periphery of the dome 68. Registering with the outer extremity of each channel 82 is an openin 84 in the main bottom 28. Secured in these openings 84 are spray units indicated in their entirety at 86.

'Each spray unit 86 includes an upwardly extending conduit 88 and a header 98 secured to the upper end thereof. A shoulder 92 having two outwardly extending hooks 94 is press-fitted onto the lower end of the vertical conduit. On each side of each opening 84 is a rivet 96 secured in the main bottom 28 and extending upwardly therefrom. The spray units 86 are inserted into the openings 84 and turned so that the hooks 94 engage the rivets 96. The headers 98 secured to the upper ends of the vertical conduits 88 each comprise a horizontal tube 98 welded to the conduit 88, and an outer sleeve I88 fitted over the tube. The tube 98 is provided with a longitudinal slot I02 throughout th greater part of its length on the upper surface thereof, and has one end open as indicated at I84. The sleeve I88 is provided with a series of aligned holes I86 and has one end closed as indicated at I88. The sleeve is placed over the tube 98 so that the holes I 86 register with the slot I 82 for restricting th total opening of the slot, a portion of the slot I82 remainin uncovered. The sleeve, I88 is retained on the tube 98 merely by friction. A pluralit of notches II 8 are formed in the flange I8 for accommodating the conduits 88 when the spray units 86 are in place. The spray units 86 are positioned so that the headers 98 assume various angles with respect to each other and to the margin of the basket in the dishwasher, as shown in dotted lines in Fig. 1.

It will be noted that there are four channels 42, forming four spaces, one between each two adjacent channels; and three channels 82, one in each of three of the spaces between the channels 42. In the fourth space is an additional channel II2 communicating with the center well 38, extending radially outwardly, and terminating near the vertical peripheral wall 36. An opening H4 is formed in the sub-bottom 32 at the extremity of this channel H2 and leads outwardly for draining the tub. A drain cock II 6 is secured to the tub at this point for draining the tub. A suitable gasket is interposed between the drain cock and the tub.

A suitable cover II'I, cooperating with sealing means II 8 secured in the side wall 22, encloses the tub.

The impeller 48 is secured to the upper end of a drive shaft I I9 entering through an opening I28 formed centrally in the center well 38. The drive shaft H9 is supported by suitable bearing and mounting means I22 secured to the sub-bottom and provided with suitable packing means. A conventional driving assembly is also provided, including a suitable drive pulley I24 and a clutch I26 for driving the impeller 48.

The sub-bottom enclosing the entire lower region of the main shell reduces to a minimum the likelihood of leaking, since all passages are formed between the two elements and effectively enclosed,- the channel forming strips 44 acting as extensions of the sub-bottom.

Fig. 13 shows to good advantage the finished tub construction of this invention, the objective being to make a unitary dishwasher so that it can be placed in almost any kind of stand or cabinet. The cabinet ll may be constructed by the user to suit his own kitchen arrangement or space, and the position of the tub within the cabinet may be fixed at one side or another to position it for the clearance of operating elements such as a motor. This is a great advantage in putting out articles in mass production, since it .can be standardized and made to fit numerous conditions. The construction is simple and economical.

Use and operation The tub is filled to a suitable depth with wash water, and the impeller is rotated, forcing the water outwardly and upwardly through the channels 42. It enters the tub again through the openings 50 at th upper extremity of the side wall 22 where it is directed inwardly and downwardly on the dishes in the basket. The bailles 58 may be positioned at various angles around the tub, if desired, so that some of the wash water strikes the dishes at the edge, and other portions of the water strike the dishes in the center. At the same time the dish water is forced through the channels 82 and through the spraying units 86 by which the water is sprayed upwardly on the dishes in the basket from the underside thereof. The lower edge of the basket rests at the upper end of the sleeve 14, and the spray units 86 are accordingly positioned below this point. It will be noted that the spray units 86 may be positioned at varying angles as shown in Fig. 1. It will also be noted that none of the spray units 86 are directed toward the center of the tub, so that the sleeves I00 can be removed without hindrance from the sleeve Hi.

As stated above, there is much sediment in strips secured in liquid tight relation to the outer surface of the side wall for forming channels therewith and continuing the channels in the peripheral wall upwardly along the side wall, there being openings in the side wall at the extremities of said channel strips, and the bottom of the main shell having an opening therein communicating with said channels.

2. A tub construction, comprising, in combination, a main shell having a bottom and surrounding side wall, and a sub-bottom enclosing and se cured in liquid tight relation to the outer surface of the bottom of the main shell, the subbottom having a eripheral wall extending partially upwardly along the side wall of the main shell, there being a center well in the sub-bottom, there also being troughs in the sub-bottom communicating with said center well and extending radially outwardly therefrom to the peripheral margin and upwardly in the peripheral wall, said troughs, together with said main shell, forming closed channels, the bottom of the main shell having a center opening therein registering with and communicating with said center well.

3. Ina tub construction, the combination, comprising, a main shell having a bottom and surrounding side wall, a sub-bottom having a peripheral wall enclosing and secured to the outer surface of the bottom of the main shell, there being channels between the main shell and the sub-bottom and extending from the center thereof radially outwardly and upwardly, there the wash water from the dishes, and this sediment tends to become lodged in restricted passages. In order to easily clean the sediment from all parts of the tub, the inserts 54 may be removed from their positions, the spray units 85 removed bodily, and the dome 60 removed. In addition, the sleeves I00 may be removed from the tubes 98 for ease in cleaning these devices.

The bafile I0 is provided with four notches I It, although there are only three spray units 86 to fit thereinto. In order to make it as convenient as possible for replacing the parts in the tub, these notches H8 are provided so that regardless of what position the dome 60 assumes when replaced, there will be a notch in each of the positions in which the spray units 86 may be inserted,

While I have herein shown and described a preferred embodiment of my invention, manifestly it is capable of modification and rearrangement of parts without departing from the spirit and scope thereof. 1 do not, therefore, wish to be understood as limiting this invention to the precise form herein disclosed, except as I may be so limited by the appended claims.

Iclaim as my invention:

l. A tub construction, comprising, in combination, a main shell having a bottom and a surrounding side wall,a sub-bottom enclosing and so cured in liquid tight relation to the outer surface of the bottom of the main shell, said sub-bottom having a peripheral wall extending partially upwardly along the side wall of the main shell, the sub-bottom having troughs therein extending radially from the center outwardly to the peripheral margin and upwardly in the peripheral wall, said troughs, together with said main shell, forming closed channels, and channel also being supplementary channels between the main shell and the sub-bottom extending from the center thereof radially outwardly and terminating in the bottom surface of the tub, all of said channels communicating with the interior of the tub at the center of the bottom of the main shell, and spray means leading from the extremities of said supplementary channels to the interior of the tub at the lower region thereof.

4. In a tub construction, the combination, comprising, a main shell having a bottom and surrounding side wall, a sub-bottom having a peripheral wall enclosing and secured to the outer surface of the bottom of the main shell, there being channels between the main shell and the sub-bottom and extending from the center thereof radially outwardly and upwardly, there also being supplementary channels between the main shell and the sub-bottom extending from the center thereof radially outwardly and terminating in the bottom surface of the tub, all of said channels communicating with the interior of the tub at the center of the bottom of the main shell, said supplementary channels at their extremities communicating with the interior of the tub, and removable spray units secured to the bottom of the main shell and leading to the interior of the tub at the lower region thereof.

5. A tub construction, comprising, in combina tion, a main shell having a bottom and surrounding side wall, a sub-bottom enclosing and secured to the outer surface of the bottom of the main shell, the sub-bottom having channels therein extending from the center thereof radially outwardly, means for continuing the channels upwardly along the side wall of the main shell, said channels opening into the interior of the tub through the side wall thereof, the bottom of the main shell having an opening therein communicating with said channels, a removable dome secured over the opening in the bottom of the main shell, said dome having openings therein for the passage of water therethrough, and supplementary channels between the main shell and the sub-bottom extending from the center radially outwardly and terminating in the bottom surface of the tub, and spray means leading from the extremities of said supplementary channels to the interior of the tub within the lower region thereof.

6. A tub construction, comprising, a main shell having a bottom and surrounding side wall, means secured to the bottom of the main shell for forming a center well therein for the reception and operation of an impeller, the bottom of the main shell having an opening therein communicating with said center well, said means forming channels leading from the center well outwardly and communicating with the interior of the tub through the bottom of the main shell, and conduits leading from the extremities of said channels and extending upwardly in the tub, said conduits having headers secured thereto, each of said headers being provided with a plurality of holes opening upwardly.

7. A tub construction, comprising a main shell having a bottom and surrounding side wall, means secured to the bottom of the main shell for forming a center wall therein for the reception and operation of an impeller, the bottom of the main shell having an opening therein communicating with said center well, said means forming channels leading from the center well outwardly and communicating with the interior of the tub through the bottom of the main shell, conduits leading from the extremities of said channels and extending upwardly in the tub, said conduits having headers secured thereto, each of said headers having a longitudinal slot formed therein, and a sleeve removably secured over each of said headers, each sleeve having a series of holes formed therein adapted to register with corresponding ones of said slots.

8. In a dishwasher having a basket rotatably mounted therein, the basket adapted to hold dishes for a washing operation, the combination of a tub construction, comprising, a main shell having a bottom and surrounding side wall, means secured to the outer surface of the main shell for forming channels therewith, said channels leading from the center of the bottom radially outwardly and then upwardly along the side wall, said channels communicating with the interior of the tub at the center of the bottom and at their extremities communicating with the interior of the tub through the side Wall thereof, bafiles at the points where said channels at their extremities communicate with the interior of the tub, said baiiles being directed inwardly and downwardly at varying angles, said means forming supplementary channels on the exterior of the bottom of the main shell leading from the center thereof radially outwardly, and communieating with the interior of the tub through the bottom thereof, and conduits leading from the extremities of said supplementary channels in the interior of the tub, said conduits having headers secured thereto, said headers having openings directed upwardly, and said headers being disposed at different positions angularly with respect to the margin of said basket.

9. A tub construction, comprising, in combination, a main bottom having an upturned periphery, a surrounding side wall formed of a flat piece and shaped to conform to the periphery of the main bottom and secured thereto, a sub-bottom enclosing and secured to the main bottom and having a peripheral wall extending partially upwardly along the upturned portion of the main bottom, said sub-bottom having a center well therein, and a main bottom having an opening formed therein registering with said center well, there being channels in the sub-bottom and positioned between the sub-bottom and the main bottom and extending radially outwardly from the center well and then upwardly along the side wall, and channel forming means secured to the outer surface of the side wall and continuing the channels formed by the sub-bottom, the outer extremities of the channels along the side wall communicating with the interior of the tub adjacent the top of said side wall.

RAY W. FRANKLIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 114,457 McCleary May 2, 1871 516,103 McCausland Mar. 6, 1894 693,746 Shaw Feb. 18, 1902 858,522 Low July 2, 1907 1,414,634 Fassio May 2, 1922 1,592,452 Ferris July 13, 1926 1,597,361 Hazard et al Aug. 24, 1926 1,656,139 Breton Jan. 10, 1928 1,664,475 Bonneau Apr. 3, 1928 1,833,374 Renshaw Nov. 24, 1931 2,195,615 Chamberlin Apr. 2, 1940 2,270,750 Bariffi Jan. 20, 1942 2,275,411 Ashe Mar. 10, 1942 2,279,619 Fisher Apr. 14, 1942 FOREIGN PATENTS Number Country Date 7,408 Great Britain Mar. 24, 1914