US2022637A

US2022637A - Washing apparatus

Info

Publication number: US2022637A
Application number: US657781A
Authority: US
Inventors: Karl K Huppmann
Original assignee: WALKER DISHWASHER CORP
Current assignee: WALKER DISHWASHER Corp
Priority date: 1933-02-21
Filing date: 1933-02-21
Publication date: 1935-11-26
Anticipated expiration: 1952-11-26

Description

NOV. 26, 1935. K K HUPPMANN 2,022,637

WASHING APPARATUS Filed Feb. l21, 1933 S Sheets-Sheet 1 Inventor' Karl K. Huppmann,

MMM

yHis Attorney.

Nov. 26, 1935. K'. K. HUPPMANN WASHING APPARATUS Filed Feb. 2l-

, 1933 3 Sheets-Sheet 2 .n P n.

4. m P r n .m 1 l -v l K H Nov. 26, 1935.

K. K. HUPPMANN WASHING APPARATUS Filed Feb. 21, 1933 5 Sheets-Sheet 5 inventori Karl K Huppmomn,

M114- His Abbo-#heg Patented Nov. 26, 1935 UNITED .STATE-S PATENT OFFICE WASHING APPARATUS Karl K. lluppmann, Chicago, Ill., assignor to Walker Dishwasher l(loi-poration, a corporation of Delaware Application February 2l, 19323, Serial No. 657,781

18 Claims,

My invention relates to washing apparatus, more particularly to apparatus for washing dishes, and has for its object the provision of' improved apparatus of this character.

More specifically, my invention relates to dishcommon use isprovided with fluid inlet and drainage conduits communicating with the vat,v

and with an impeller driven by means of a motor arranged on the exterior of the vat and connected with the impeller by means of. a shaft entering the vat. A

In one of its aspects, my invention contemplates the provision in apparatus of this character of an improved arrangement of iiuld inlet and drainage con'duits, and of the impeller and its of the vat. The impeller is arranged to rotate above the drain port substantially in the vertical axis of the vat, and .its driving shaft enters the vatthrough this port with its axis substantially coaxial with those of the port and vat. Sur- -rounding the shaft is `a valve-controlling the drain port. The" drain port and conduit preferably will be arranged in a suitable vframe' or bushing that is supported by the bottom wall of the vat, and this frame preferably will 'also ,be

arranged to support the impellerl driving motor duit also isl arranged to communicate with the vat substantially in this axis. In the preferred arrangement of this. form, the uid supply and `drain ports are arranged about the impeller shaft substantiallydn concentric relation with 'each other. vIn this ,form,.the uid inlet conduit is arranged inthe frame or bushing that serves to support the' motor and shaft and in' which the drainageconduit is provided.l

For amore complete understanding of myinvention, reference should behad to the accompanying drawings in which Fig. l is a fragmentary view in elevation of dish-washing apparatus embodying my invention, portions being shown in section andvportions being broken away so as 5 to illustrate certainl structural details; Fig. 1a is a fragmentary view in elevation illustrating a portion of the washing apparatus of Fig. 1; Fig. 2 is a plan view of a portion of the apparatus shown in Fig. 11 parts being shown in section 10 '.and parts broken away so as to illustrate cerstructural details; Fig. 3 is a fragmentary sectional view in elevation of dishwashing apparatus embodying a modied form of my invention; Fig. 4 is a fragmentary vertical central'sec- 15 tional view taken through a portion of the mechanismbf Fig. 3; Fig. 5 is a view in plan of a portion of the apparatus of Fig. 3, parts being shown in section and parts broken away so as to illustrate-certain structural details; Fig. 6 is a frag- 2o mentary sectional view in elevation of dishwashing apparatus embodying still another motiiiled form of my invention; and Fig. 'l is a plan view of a portion of the'l apparatus of Fig. 6, portions being shown in section, and parts Ybroken away 25 so as to illustrate certain structural; details.

. In Figs. l and 2 of the drawings, I have shown my invention as applied to dishwashing apparatus comprising' a vat IU having a relatively deep chamber, preferably substantially square 30 in horizontal cross section. The walls defining the vat areformed of some suitable material, such as sheet metal, the surfaces of whichV may -be enameled.. -The vat is'supported in an up- .right position within and by means of a suit- 35 able easing (not shown). It will be understood that the vat is provided with a suitable cover i (not shown).

It will also be understood that the vat will beA provided with suitable dish supporting open- 40 work baskets or racks (not shown) which are removably supported in the lower vand upper y portions of the vat.

The bottom walll l2 of the vat I0 is provided with a plurality (four) of inclined portions I3 45 which slope downwardly toward the center of the vat and terminate in an opening Il arranged centrally of the vat, the of the opening being. substantially coaxial with righe central vertical axis of the vat. 50

In the lowerportion -oi the vat above the opening il is a suitable impeller I5 arranged to rotate on an axis substantially coaxial with the vertical axis of the vat and with theA axis of the opening Il. The impeller i6 is operated by an 55 electric motor I 6 mounted below the bottom wall of the vat. The motor shaft I6a enters the vat and has a driving connection with the impeller.

The motor I6 is supported on the bottom wall of the vat by means of a supporting frame l1. The four bottom walls I3 of the vat terminate in a circular inturned flange 20 surrounding the opening I4. The frame I 1 is secured to this flange by means of a plurality of bolts (not shown) which are passed through a clamping ring member 2l supported on the upper side of the flange 20 and into tapped holes 28a provided for them in the frame l1.

As shown, suitable water-tight sealing means or gaskets 2 Ia will be provided between the flange 2|] and the frame I1 and the ring 2l. The frame I1 is provided with a depending skirt 23 of enlarged diameter. This skirt serves to secure and support the motor I6. As shown, the upper portion of the motor frame is provided with an outwardly projecting flange 24. This ange is received by a member 25 formed of some suitable resilient material, such as rubber. 'I'he resilient member 25, as shown more clearly in Fig. 1a, has a plurality of spaced enlarged sections 25a of substantially U-shape and joined by U-sections 25h of somewhat smaller dimensions, the two legs of both U-sections 25a and 25h being arranged to grip tightly the upper and lower sides of the flange 24. The resilient member 25 is secured within the skirt 23 by means of a clamping or pressure ring 26 which in turn is secured to the skirt by means of a plurality of radially disposed set screws 21 engaging the clamping member, as clearly shown in Fig. 1.

The frame I1, in addition to serving as a support for the impeller driving motor I6, has several additional functions: It serves to convey fresh cleansing water to the vat I0, and further, serves to conduct soiled water from the vat to a suitable drain. The frame I1, as shown, is provided with an inlet or fresh cleansing fluid supply conduit 30. This passageway is defined by an outerv wall 3I of the frame, an inner wall 36 vspaced from the outer wall, a bottom wall 31 joining the inner and outer walls at the bottom, a top wall 38 joining these walls at the top' and end walls 39 (Fig. 2). This passageway or conduit 38, as shown (Fig. 2), extends along the periphery of one side of the frame through an arc that subtends an angle somewhat greater than Communicating with this conduit 38 is a passageway or conduit 40, which, as will be pointed out hereafter in greater detail, communicates with a suitable source of fresh water supply.

The frame I1 is further provided with an internal chamber 4I, one side of which is defined by the inner wall 36 of the conduit 38. Opposite' this wall the chamber is provided with a relatively long opening 42, which communicates with a conduit 43, which in turn communicates with a drain' passageway 44. The top of the chamber opens into the vat through a port 4Ia. The bottom of the chamber is dened by a wall 45, which is provided with a central reentrant portion 46. This reentrant portion, as shown in Fig. 1, projects upwardlyfor some distance into the chamber 4I in a substantially vertical direction and thence slopes inwardly toward the motor shaft I6a, nally terminating in a vertically arranged portion 41 of relatively small diameter. The portion 41, as shown, is provided with an aperture therethrough and supportedin this aperture is a sleeve 48 surrounding'the motor shaft, arranged in a substantially vertical position. The lower end of the tube 48 has a. fluid-tight connection with the portion 41 of the bottom wall of the frame.

Surrounding this sleeve 48 is a valve 58 ar- 5 ranged to control communication between the vat and the drain chamber 4I. This valve 50 is provided with a closure portion 5I that cooperates with ta valve seat 52 supported by the frame I1. 'I'his seat, as shown, rests in a ledge 10 or recess provided for it in the frame. The valve is further provided with a sleeve 53 extending vertically upwardly from the closure portion and arranged in concentric and spaced relation with the sleeve 48.' The space between the members 15 48 and 53 communicate directly with the drain chamber 4I and function as an overflow passageway for the cleansing fluid or other liquid introduced into the vat I8.

The valve 50 moves vertically between its closed 20 and open positions, and is guided in its movement on the sleeve 48 by means of a plurality of spaced guide members 54 that project inwardly from the sleeve portion 53 and slidably engage the outer surface of the tubular member 48. 25

A suitable valve operating member is provided, this member, as shown, comprising a horizontally disposed operating shaft 55 having a portion arranged within the drain chamber 4I. This shaft is provided with crank arms 56 which carry out- 30 Wardly projecting pins 51 that cooperate with arms 58 depending from the valve 50 and provided with apertures for receiving the pins, whereby Vthe valve can be raised and lowered by rotating the shaft 55. 35

The shaft 55 protrudes from the chamber 4I. The protruding portion of the shaft is operably associated with suitable operating mechanism. This operating mechanism forms no part of my invention, but is described and claimed speci- 40 cally in a copending application of Carl M. Snyder and Jesse H. Clark, Serial No. 608,248, filed April 29, 1932 and assigned to the same assigneeas this invention. As there described, the protruding portion of the valve operating shaft 55 is 45 provided with a crank arm 60 which is provided .with a follower 6I that engages a suitable cam 62. The cam 62 is mounted on and moves with a shaft 63, which is geared to an operating shaft 64 through bevel gears 65. The shaft 64 is pro- 50 vided with a suitable manually operable control member (not shown) whereby the motion of the cam shaft 63 and hence of the drain valve 58 is controlled. It is believed to be unnecessary t0 describe in further detail the means for operat- 55 ing the drain valve since, as previously pointed out, this specific operating mechanism forms no part of my invention.

Arranged above the drain port 4Ia and valve 50 is a suitable strainer 66.

The impeller I5, as shown, is provided with blades 61 which may have any suitable shape, the important feature being that the blades be given a shape such that a cleansing fluid placed in the lower portion of the vat will be thrown upwardly 65 and outwardly through the dish supporting racks (not shown) in an efilcient manner by rotary motion of the impeller.

The blades Ii'lfof the impeller are mounted on 70 an apron-like member 68 which, as shown, is provided with an enlarged skirt that is arranged exteriorly of the valve sleeve 53 and spaced from it suilciently to avoid any possible interference by the valve to the rotation of the impeller or 75 by the impeller to the opening andclosing movement of the valve.

The skirt of the apron-like member 68 tapers inwardly at its upper end where it is secured to the motor shaft 16a. I A s shown, the upper end of the skirt is provided with a reentrant portion r69 that surrounds and closely iits a bushing 18 formed as'a single piece, and may be made from any suitable material, such as cast aluminum, or pressed steel.

The washing apparatus is -provided with a suitable sourceof cleansing iiuid supply,such as hot wate which is directed to the washing apparatus through a conduit 14. 'I'hs conduit communicates with the conduit 48 and hence with the iiuid supply conduit 88 through aI suitable control valve 15. 'Ihis valve comprises a closure member 16 that cooperates with a valve seat 11 which controls communication between thel supply conduit 14 and the conduit 48. 'The valve seat divides thel valvehousing into two chambers 18 and 18a, the

vformer communicating with the supply pasageway 14 and the latter `with the conduit 48. The valve is provided with a piston 88 which'is arrangedv to reciprocate in a cylinder 8 I and which functions to operate the valve between its open and closed positions by means of uid pressure which'is admttedto the chamber 18 from the' uid supply conduit 14. ,Operation of .the valve in response to this pressure is controlled by means of a pilot valve 82 arranged axially of the valve and controlling communication between the cylinder 8l on the left of the piston'and the chamber 18a. When the pilot valve is moved towardl the left, as viewed in Fig. Y2, pressure behind the piston is relieved and the .iluid in the chamber 18 forces the inlet valve to the left thereby estab- I. lishing communication between the pconduit 14 Serial N0. 608,248.

and the passageway 48. When the` pilot valve is returnedto its right hand position', fluid leaking by the piston 'from .the chamber` 18 builds up a pressure behind it suilicient to close the vjalve. The pilotI valve is moved toward the left to eiiect the opening of the inlet valve 16 by means of a suitablel lever 63 lwhich in turn is controlled by means of a suitable cam 8'4 whichmperates the lever 83 through the medium of a pin or, follower 85. Thevcam 84 is mounted on the shaft 68 with 'the drain valve ca m 62 and hence is also operated bythe manually operable-*control member (not -,shown) arranged to control the shaft -64. It is believed to be unnecessary. to describe in further detail, the construction of the inlet valve or the mechanism for controlling its operation since these members form no part. of my invention. The inlet valvev and its operating mechanism are described indetailandplaimed in the above-mentioned copending Snydfand-Clarkwapplication,

. The supply chamber 88 communicates with theL vat vI8 through a suitable spray device, which asshown comprises a pair of upright conduits l 81 and88 disposed substantially 180`o apart so as ends toupright coupling members 88 and 8I sup- ;closedand ,the motor is deenergi'zed. Itwill be observed that I have provided proved arrangement ofiluid inlet "and drain pas- 7o? ported by the ring member 2l and which are in communication with the supply chamber 88 through nipples 82 and 83. Conduits 81 and 88 at their upper ends are turned inwardly toward each other at nearly right angles to the vertical, and terminate in a chamber 94 arranged substantialy in the vertical axis of the vat I8. Communicating with the chamber 84 is an upright conduit 85, and mounted for'rotation on the upper end of this conduit and in fluid communication with it is a suitable spinner or spray device 86. This spray device 86, as shown, is provided with a pair of reaction nozzles 81 and 91a.. 'I'hese nozzles are arranged at diilerent angles to the vertical whereby the water issuing from themis directed through different paths which sweep through substantially the entire upper portions vof the vat and through the dish-supporting racks l(not shown) supported in the vat..

'I'he conduit 86 is provided on its exterior with 2 a plurality of radiallydisposed iins 88, which, as shown,slidably receive and guide a basket or tray |88 to a position of rest above the impeller and which function to secure the tray in the vertical position as shown in Fig. 1.

The spray device together with the arrange--` ment of

conduits

81, 88 and 95 conducting iiuid to it are described and claimed in a copending application of Jesse H. Clark, Serial No. 653,243,

flledJanuary 24, 1933, and assigned to the same 30 assignee as this invention.

The impeller driving motor I6 is provided with va suitable source of electrical supply (not shown). controlled by means?of suitableswitching mechansm (not shown). This switching mechanism is controlled by suitable meansA comprising a cam I8'I which also is mounted on the caml shaft63 and .controlled bythe shaft 64. The. control `switching' mechanism for the motor I8 forms n o part of the present invention and it is believed-i0 to be unnecessary, therefore... to describe it in desequence of operation of the apparatus, which will include washing, and rinsing or spraying cleansing steps. In one position of the shaft 84 both the -inlet and the drain valves are opened whereby water from the sulziplyY source 14 is sprayed by the device 86 over the dishes and v A other articles to be. cleansed and is passed dirrectly'to the

drain

4I, 48, 44. In another position of the shaft, the drain valve is closed while the inlet valve is'opened so that water issuing from the spray device is allowed to accumulate in the vat. The water as it accumulates imposesvv a load of vincreasing magnitude on the impeller I5. This increase in load is utilized to automatically v close the inlet valve by mechanism described and claimed in the Snydenand Clark application.

""The shaft` 84 o! course is provided with anoiI 651 Position. this positionf'. the n grain' valve. moved to its open position, the supply valve 16 ,is

sageways v88 and'48,-and.4I-, 48 and 44, which are ,l incorporated in a single frame I1. This frame .v

. also serves tol support the operating motor I6, andv moreover, the valve mechanism controlling the inlet anddrain conduits.y The .drain valve is'ar- 752 ranged centrally of the vat and so also is the motor operating shaft IGa which enters the vat through the drain opening. The arrangement of parts, is therefore, very compact and eflicient in construction.

In Figs. 3, 4 and 5, I have shown a modiiled form of my in vention which is quite similar to the form lshown in Figs. 1 and 2.

The vat I I of the modified form is substantially circular in horizontal cross-section and is provided with an inverted frusto-conical bottom wall I. In the lower portion of the vat and preferably arranged to be embraced by the bottom wall is a suitable impeller ||2 arranged to rotate on an axis substantially coaxial with the vertical axis of the vat. The impeller is driven by an electric motor ||3 supported on the exterior of the vat and mechanically connected with the impeller by means of a shaft ||4, arranged in the vertical axis .of the vat.

The bottom wall I I I of the vat is provided with a centrally arranged circular opening I I5 formed therein. In this opening is mounted a bushing ||6 which serves to support the motor ||3 and which, as will be pointed out in greater detail hereinafter, is provided with a drainage passageway for the vat. The bushing ||6 is provided with a substantially horizontal annular flange ||1 resting upon the inner surface of a suitable substantially fiat supporting ledge ||8 formed from the material of the bottom wall surrounding the opening ||5. The bushing is also provided with a depending cylindrical portion extending downwardly through the opening ||5.

The bushing ||6 carries a suitable frame |2| for supporting the impeller motor I I3, this frame having an outwardly projecting flange or apron portion |22, to which the motor is detachably secured by suitable means, such for example as bolts |23 passed through suitable apertures |24 provided for them in the apron. Arranged above and below the apron are rubber insulating rings |25 and |26, the upper ,portion of the motor frame rests against the lower ring |26 and the heads of the bolts |23 rest on the upper rubber ring |25. The apertures |24 through which the bolts |23 are passed are enlarged somewhat as shown and the annular space about the bolts is lled with rubber insulation |21. The rubber rings |25 and |26 and the rubber |21 in the apertures serveto insulate the motor and 'provide a resilient mounting for it in the frame.

It will be observed that the frame |2| is pro'- vided above the apron with a cylindrical portion |28 which surrounds and fits rather closely the cylindrical depending portion |20 of the b ushing ||6. 'I'his portion |28 of the frame is detachably secured to the bushng by'means of suitable clamping set screws |30 disposed circumfertially about the frame in spaced relation.

The chamber |3| has a bottom wall |35 generally inclined downwardly, as shown in Fig. 3, from one side of the drain port |32 to the drain |33 on the opposite side. vided with a central reentrant portion |36 hav,- ing a circular aperture |31 therethrough surrounding the motor shaft, the axis of the aperture being substantially coaxial with the vertical axis of the vat. Supported within this aperture This bottom wall is proso as to extend in a vertical direction from the bottom wall |36 upwardly into the vat is a tubular member |38 corresponding to the tubular member 48 of the form shown in Figs. 1 and 2.

Surrounding this tubular member is a valve |40 5 having substantially the same form as the valve 53 of Figs. 1 and 2. Thus, the valve |40 is provided with a valve closure portion |4| cooperating with the seat surrounding the drain port |32, and with a tubular portionl |42 extending ver- 410 tically upwardly therefrom and spaced somewhat from the tubular member |38 so as to provide an overflow passageway from the vat to the drain.

The valve |40 is operated between its closed and open positions, shown in full and dotted lines 15 in Fig. 3, by means of a shaft |4| which, as shown, projects into the chamber |3I and on its inner end carries a crank |43. 'I'his crank |43 is mechanically connected with the valve by means of a link 43a which is secured at one end to the 20 crank and at its other end to the valve portion |42, whereby the valve can be moved between its open and closed positions by rotating the shaft |4|. The positions of the crank and link when the valve is closed are shown in dotted lines in 25 Fig. 3, whereas the positions of these members when the valve is open are shown in the dot-dash lines of Fig. 3. It will be understood that the shaft |4| willbe provided with any suitable means (not shown) for operating it. 30

The impeller ||2, as shown, is provided with an apron |44 which surrounds the valve |40 and is so proportioned that the valve has freedom'of movement between its open and closed positions without any interference from the impeller and so that the impeller has freedom of rotation without any interference from the valve. The apron |44 is secured at its upper end to the motor shaft ||4. For this purpose, the apron is provided with a reentrant portion |45. This reentrant portion has a centrally arranged aperture therethrough, preferably of non-circular cross-section, which engages the-upper end of the shaft ||4 having a. corresponding cross-section. The impeller is secured by means of a suitable 45 screw |66 threaded into the upper end of the motor shaft so that its head overlaps the adjacent edges of the impeller. The apron |44 supports the impeller blades |41 which, as shown, are a1'- ranged on opposite sides of the apron.

Water' is introduced to the vat by means similar` to the means for introducing the water of Figs.

1 and 2. In Fig. 3, however, the water is not supplied through a passageway provided in the drain conduit and motor supporting bushing ||6, but is introduced by means of a conduit |50 which communicates with a circular ring-like passageway or conduit |5| supported b'y the bottom wall of the vat substantially in a horizontal position. The circular conduit |5| communicates with a G0 plurality of conduits |52 similar to the conduits 81 and 88 of Figs. 1 and 2. There are four of these conduits |52 spaced substantially 90j apart and at their upperends. they communicate with a chamber |53 arranged in the vertical axis of 65 the vat. 'Ihis chamber communicates with a vertical conduit |54 which in turn communicates with a spinner device |55 provided wit reaction nozzles |56, |56a. The conduits |52 furt er serve to support a. suitable open-work basket |51. 70A

It will be observed that when'the valve |40 is in its closed position the walls of the sleeve 42 of the valve |40 and the inner walls of the apron |44 of the impeller constitute a passageway leading from the interior of the vat to the drain. If

a ow of water be started through this passageway. it is likely that the entire contents of the vat will be emptied by reason of siphon action. To

avoid any possibility of siphon action, the apron |44 is provided with a plurality of apertures |58.

The apron 68 of Figs. 1 and 2 may also be provided with similar apertures, but in this apparatus there is very little likelihood of siphon action because the passageway to the draijn dened by the apron, the valve 53 andthe tubular member 48, is open at its upper end to the exterior of the vat through the interior of the tube 48; to the chamber between the frame |1 and the motor |6 dened by

walls

46, 45, 31 and skirt A23, around the annular ring between the resilient blocks 25a and between the motor and the annular clamping ring 26.

-It will be understoodthat in operation of the apparatus when it is desired to spray or rinse the dishes, fresh water is supplied to the spray device through the conduit |50. Water issuing Afrom the spray device is hurled through the dish supporting racks (not shown) and then iinds' Iits way to the bottom of the vatfrom which it is drained through the port |32 and passageways |3| and |33. The drain valve |40 will be opened, of course, for the spraying operation. When it is desired to wash the dishes, the drainv valve is closed and the proper quantity of water is supplied to the vat where it accumulates in the bottom portion The impeller ||2 picks up theaccumulated'water and hurls it upwardly and' outwardly through the disli supporting rack so as to effect a washing action on 'the dishes and utensils supported in them.

In Figs. 6 and 7, I have shown a still further modied form of my invention wherein water is |66 which is driven by a motor |61 supported by the bushing |63-beneath the bottom wall of the vat in substantially the samefashion as is the motor ||3 of Fig. 3 supported by its bushing H6.F The motor |61 has a driving connection with theimpeller by means of a shaft |68. The bushing |63 is providedwith a drain chamber |10 communicating with the vat through a port |1| and with a drain conduit |12 through a port |12a.

3 to 5. The drain chamber, as shown, is provided with an inclined bottom wall |10a similar to the bottom wall 35 of Fig. 3, the remaining walls of th chamber being formed as are the walls of Fig'. 3. The port |1| is controlled by means of a valve |13 similar to the valve |40 oi the form shown in Figs. 3 to 5'. `'Ihis valve is operated in substantially identically the same fashion'as is the valve |40 ofFigs.-3 to 5 by means of a shaft |14 mechanically connected with the valve through a crank arm |15 and a link |16. The impeller |66, like the impellers I5 and I2 of the previous forms describedis provided with an' apron |11 upon which theimpeller blades |18 are supported. 4The apron 11 is provided with and supported by means of the bushing |63. 10v

Water is supplied tothe annular conduit |19 by means of a supply conduit |83. This conduit communicates with the annular passageway through a conduit |84, provided in the bushing |68. ThisA chamber'or conduit |84 is dened by 15 top and bottom walls and |86 and by'side walls |81 merging in the inclined bottom wall |10a of the drain chamber |10. As a'matter of fact, the top wall |85 oi the inlet passageway is i defined by a portion oi this bottom wall of the 20 drain passageway. The bottom wall |86 of the inlet chamber, Aas shown (Fig 6) inclines upwardly from the conduitl |83 and merges in the bottom wail |10a of the drain chamber substantially at the central vertical axis of the vat.

The bottom wall |10a of the drain chamber is provided with a reentrant portion |90 which is provided, as shown,'with a centrally arranged aperture therethroughl surrounding the shaft |68.

The outer tubular member |8| is supported at its 3Q bottom end in this aperture. The inner tubular member |80 is supported by the bottom wall |86 of the inlet passageway which is provided with la centrally arranged aperture |9| surrounding the shaft |68 and arranged to receive the lower 35 end of this tubular member. It will be observed that by reason of this construction, the inlet chamber |84 communicates directly with the annular passageway |19.

At its upper end the annular passageway |19 40 communicates with a spinner or spray device |93. The reaction nozzles |94 of the spinner are supported by means of a, conduit |95 which at its lower end is supported by the impellerv |68. The apron |11 of the impeller, as shown, is attached 45 at its upper end to the impeller shaft |68 by means of a member |96 which is tted to the impeller shaft and secured thereto by means of -a screw |96a. The member |98 .preferably is formed 'integrally with the apron, but is -spaced 50 somewhat from the apron and connected thereto by means of spaced radial arms |91. This arrangement provides for communication between the spray device and the annular supply conduit |19'. Communication between the annular sup-v 5.5

will be formed of sgme flexible material, such aso rubber, is provided with inner and outer portions |98a and |98b arranged, as shown, to'be contracted aboutthe inner and outer tubes 80 and |8| respectively. vBetween these inner and outer portions |98a and |98b is an annular -passageway 65 o r c o'nduit |99 in direct. communication with the supply passageway |19 and with the conduit |95. yThe inner and outer portions |98a and |98b are united at their upper-ends by spaced radial arms 200. The upper end of this member 70 |98 lies against the inner walls of the apron 11 so as to establish a fluid-tight connection between the annular supply passageway |19 .and the impeller. 1

It will be observed that iiuid which is supplied. 75

Water drained from the vat by opening the valve |13 passes into the chamber |10 and from there flows into the drain |12.

While I have shown particular embodiments of my invention, it will be understood, of course, that I do not wish to be limited thereto since many modifications may be made. and I, therefore, contemplate by the appended claims to cover any such modifications as fall within the Itrue spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. Dishwashing apparatus comprising walls dening a vat, the bottom wall of said vat being provided with a port providing for the passage of liquid between the interior and exterior of said vat, a liquid circulating impeller within said vat above said bottom wall provided with an apron and liquid impelling blades carried by said apron, a driving shaft for said impeller entering said vat through said port, a tubular valve closing said port surrounding said shaft in spaced relation with it and extending upwardly into said apron in spaced relation with said apron, a tubular member surrounding said shaft entering said vat through said port spaced both from said shaft and said tubular valve, the upper end of said tubular member extending upwardly into said apron above the upper end of said tubular valve and opening into the interior of said vat and the lower end opening to the exterior of said vat, and means for operating said valve between closed and open positions.

2. Dishwashing apparatus comprising a vat, provided with a bottom wall having an opening therein, a drain, a frame below the bottom wall of said vat provided with walls defining a chamber closing said opening and having a port at its upper end communicating with said opening and a second port connecting the lower portion of said chamber with said drain, the bottom wall of said chamber provided with a centrally arranged aperture, a uid circulating impeller in said vat above said frame, a driving shaft for said impeller arranged vertically through said aperture and directed into said vat through said chamber and said rst named port, said first-named port having a diameter larger than the diameter of1 said shaft, a motor supported by said frame for operating said shaft, a valve for said rst named port surrounding said shaft, an operating member for said valve supported by said frame, said frame being provided with a iluid inlet passage- Way separate from said drain passageway, uid conduits means between said uid inlet passageway and said vat and a liquid sealing member fitted into said-aperture arranged to prevent the iiow of liquid through said aperture when said valve is open to permit liquid to flow from said vat into said chamber.

3. Dishwashing apparatus comprising a vat provided with a bottom wall having an opening therein, a fluid circulating impeller in said vat above said opening, a frame below said bottom wall provided with bottom and side walls defining a chamber closing said opening and having a port at its upper end communicating with said opening, a driving motor for said impeller supported by said frame on the exterior of said vat,

a driving shaft operated by said motor directed vertically through said port at the upper end of 5 said chamber and said opening in the bottom wall of said vat, means connecting said shaft with said impeller, a valve for said port surrounding said shaft and controlling communication between said chamber and said vat, a tubular 10 member supported by said frame in position to extend vertically through said port and said opening in said bottom wall between said shaft and said valve, a liquid passageway from said chamber controlled by said valve, and a plu- 15 rality of members on said valve engaging said tubular member so as to guide said valve in its movement between its open and closed positions.

4. Dishwashing apparatus comprising a vat 20 provided with a bottom wall having an opening therein, a frame supported below the bottom wall of said vat provided with a drain chamber hava bottom wall and a port at its upper end opposite said bottom wall communicating with said 25 opening in the bottom wall of said vat, the axis of said port being substantially coaxial with the vertical axis of said vat, the bottom wall of said chamber having a reentrant portion extending upwardly through said port and having an open- 30 ing therein arranged with its axis substantially coaxial with the vertical axis of said vat, a tubular member supported by said frame extending upwardly from said opening in said reentrant portion in a vertical position with its axis substan- 35 tially coaxial with the vertical axis of said vat, an impeller in said vat provided with an apron surrounding said tubular member and with fluid circulating blades carried by said apron, a motor for operating said impeller, a driving shaft be- 40 tween said motor and said impeller directed through the opening in said reentrant portion of said bottom wall and through said tubular member, a tubular valve for closing said port surrounding said tubular member in spaced relation with 45 it and having circumferentially spaced members projecting inwardly so as to engage said tubular member to guide said valve between its opened and closed positions, and a drain conduit connected with said drain chamber. 50

5. Dishwashing apparatus comprising a vat provided with a bottom wall having a drain opening therein, a metallic frame, means supporting said frame below said bottom wall so as to close said opening, said frame being provided with a 55 passageway providing for the admission of cleansing fluid to said vat, and a centrally arranged passageway separate from and embraced by said rst passageway providing for the drainage of soiled iluid from said vat, said centrally arranged 60 passageway communicating with said drain opening in the bottom wall of said vat, an impeller in said vat, a motor on the exterior of said vat for operating said impeller supported by said metallic frame, a shaft mechanically connecting said 65 motor with said impeller entering said vat through said centrally arranged drain passageway and a valve for said drain passageway surrounding said shaft arranged when closed to prevent the. flow of liquid from said vat to said drain 70 passageway and when opened to permit liquid to iiow from said vat to said drain passageway.

6. Dishwashing apparatus comprising a vat provided with a bottom wall having a drain opening therein, a metallic frame, means supporting T5 said frame below said bottom wall so as to close said opening, said frame being provided with a centrally arranged drain chamber communicating with said drain opening in said vat-and Aconstituting a drain passageway, and a second chamber arranged about said first mentioned chamber and constituting a fluid supply passageway for said vat, fluid conduit means connecting said fluid supply passageway with said vat, a fluid circulating impeller within said vat.- a motor for driving said impeller supported by said frame,

the shaft of said motor extending throughsaid drain passageway and opening into said vat,

means connecting said shaft with said impeller,

a valve within said vat surrounding said shaft and arranged to control said drain opening and valve means carried by said frame arranged to control'the supply 'of uid to said iluid supply passageway. l

A'1'. Dishwashing apparatus comprising a vat provided with a bottom wall having an opening therein, a fluid circulating impeller in said vat, a frame4 supported below said bottom wall. said frame provided with bottom and side walls deiining a chamber closing said opening and having a port ai; its upper end communicating with said opening and also with an opening in its bottom wall, a driving motor for said impeller supported by said frame o n the exterior of said vat, a drivin'g shaft operated by said motordirected through said ope'ning in the bottom wall of said chamber. said port and said opening in the bottom wall of said vat, means connecting said shaft with said impeller, a tubular member having a diameter larger than that of said shaft rigidly supported by said frame around said shaft with one end mounted in the opening in the bottom wall of said chamber and its other end communicating with the interior of said vat so as to define an open pasageway between the interior and the, exterior of said vat, means providing a liquid-tight seal between said one end of said tubular member4 and said frame, a valve for said port surrounding said tubular member arranged in one position to close said port to prevent the ilow of liquid between said vat and said chamber and in another position to permit liquid to flow between said vat and said chamber and means supported by said frame controlling the operation of said valve.-

8. Dishwashing apparatus comprising 'a vat, a drain, a frame at the bottom wall of said vat provided with bottom and side walls defining a drainchamber having a port at its upper end communicating with said vat and a port connecting the lower portion of said chamber with said drain, the bottom wall of said frame having areentrant portion shapedto direct liquid from said vat to said last named port, said reentrantwall portion having a centrally arranged aperture therein, a liquid circulatingimpeller in said vai'.

' above said frame, a driving shaft for `said im peller arranged vertically within said aperture and directed through said drain chamber and said first named port into said vat, a motor supported by said frame fc." operating said shaft, a valve for said ilrst-named port surrounding saidv shaft and an operating member forsaid valve supported by said frame'.

9. Dishwashing apparatus comprising a vat, a metallic frame supported in the bottom wall of said vat provided with walls defininga centrally arranged drain chamber, said chamber having a bottom wall and a port connecting said chamber with said vat, a conduit in said frame communicating with said drain chamber and adapted to'be connected with a drain, said frame also being provided with walls deilning a liquid `supply'chamber about said centrally arranged drain chamber and with a conduit communicating with said supply 'chamber -adapted to be connected with a liquid supply source, conduit means connecting said liquid supply chamber with said vat to convey liquid to said vat from said supply chamber, the'bottom wall of said drain chamber having acentrally arranged aperl0 ture therein, an impeller in' said vat above said frame provided with an apron and liquid impelling blades carried by said apron, a driving motor for said impeller secured to said frame beneath its bottom wall, the shaft of said motor l5 extending vertically through said aperture, drain chamber and port into said vat where it is connected with said impeller, a tubular valve closing said port to close said drain chamber to said vat it and extending upwardly into said apron,-a tumembera'nd said frame around said aperture.

bular member itted within said aperture and rigidly secured to said frame in an upright position within said tubular valve and in spaced relation with'it, the upper end of said tubular ,rnern-` 25 ber extending'materially above said valve so as to provide a Afree fluid passageway between said vat and the exterior thereof, and means providing a liquid-tight connection between said tubular 30 10. Dishwashing apparatus comprisinga vat, a uld circulating impeller in said vat, a driving. shaft entering the bottom of said vat and having a driving connection with said impeller. ,walls dening a uid inlet passageway for saidvat ar- 35 ranged around said shaft,wal1s dening a uid drain passageway for said vat around said fluid inlet passageway and a valve surrounding said walls dening said inlet passageway arranged to controlsaid drainpassageway'. 40 11. Dishwashing apparatus comprising a -vat provided with a centrally arranged-drain port in its bottom wall, a drain passageway communicatingwith said port, a fluid circulating impeller in said vat, a driving shaft for said impeller enter- 45 ing said vat through said drain port. a uid inlet passageway for said vat entering said vat through said drain port and a valve surrounding said shaft controlling saiddrain port.

fluid. circulating impeller in said vat above said opening, a frame below said opening having a drain passageway opening centrally into said vat,

a motor supported by said frame,4 a shaft con- 55 necting said4 motor with said ,impeller entering said vat centrally of the opening of said drain passagewayinto said vat, said framevalso having a'n inlet passageway terminating in said vat in an annular passageway surrounding said shaft .60 anda valve for saidv drain opening surrounding said shaft and said inlet passageway.

13. Dishwashing apparatus comprising a vat having an opening in its bottom wall to provide for the drainage of liquidfrom said vat, a me- 60 tallic frame below said vat 'provided with walls defining a chamber below said opening having an open upper end and a bottom wall opposite said open upper'end, means securing said frame to said vat so ,as to close said opening in its bottom 73 wall and so that the open upper-end of said chamber communicates with said vat directly through said opening, said bottom wall of said chamber having an aperture therein, a fluid circulating impeller in said vat above said opening in its 7 5 and directed upwardly through said chamber and into said vat through said opening in the bottom wall of said vat, a. motor supported by said frame for operating said shaft, a tubular valve for said opening surrounding said shaft arranged when in one position to close said opening to said chamber to providel for accumulation of liquid in said vat and when in another position to open said opening to connect said vat directly with said chamberto provide for the drainage of liquid from said vat, an operating member for said valve supported by said frame arranged to move said valve between saidpositions, a tubular member mounted within said aperture in the bottom wall of said chamber extending upwardly through said chamber into said vat through said opening in its bottom wall labout said shaft and within said tubular valve, means providing a liquid tight connection between said tubular member and said frame and a drain conduit connected with said chamber.

14 Dishwashing apparatus comprising a vat, a plurality of concentrically arranged fluid passageways communicating with said vat for conducting cleansing fluid to said vat and draining soiled fluid from said vat, a fluid circulating impeller within said vat, a driving shaft for said impeller directed into said vat through the inner of said passageways and a tubular valve within said vat controlling one of said passageways and surrounding said shaft.

15. Dishwashing apparatus comprising a vat, an impeller in said vat, a motor on the exterior of said vat for rotating said impeller, a shaft connecting said motor with said impeller, a fluid passageway surrounding said shaft, a tubular valve j vfor said passageway surrounding said shaft and movable in the axis of said shaft between its open and closed position, and a second fluid passageway embraced by said valve communicating With said vat.

16. Dishwashing apparatus comprising a vat having a drain port in its bottom wall, a tubular valve for said port movable in a vertical direction.

between its opened and closed positions and havapron-like A.portion embracing sai'd upwardly ex- -5' `tending portion of said valve and iiuid impelling blades carried by said apron-like portion, a uid inlet conduit entering said vat through said drain port and extending upwardly into said vat through said drain valve and said apron-like portion of said impeller and means connecting said inlet conduit with said vat at a point above said impeller.

17. Dishwashing apparatus comprising a vat provided with an opening in its bottom wall, a fluid circulating impeller in said vat above said opening, a frame below said opening having a drain passageway opening centrally into said vat,

a motor supported by said frame, a shaft co'nnecting said-motor with said impeller entering said vat centrally of the opening of said drain passageway into said vat, said frame also having an inlet passageway terminating in said vat in an annular passageway surrounding 'said shaft, and a tubular valve for said drain opening surrounding said shaft and said inlet passageway extending vertically within said vat in spaced relation vwith said inlet passageway, the space between said valve and said inlet passageway communieating at the upper end of said valve with said vat and at the lowerend with said drain passageway so as to constitute an overflow.

18. Dishwashing apparatus comprising a, vat provided with an opening in it's bottom wall, a

fluid circulating impeller in said vat above said passageway communicating with said inlet annu' 45 lar passageway and a tubular valve for said drain opening surrounding said tubular members. KARL K. HUPPMANN.

cERTIFIcArE 0R CORRECTION.

Patent N'o. 2,022,637. November 26, 1935.

KARL K. HUPPMANN.

It-ie hereby certified that error appears in the printed specification of the above numbered patent requiring correotion as follows: Page first column, line 64, slain 2, for "conduits" read conduit; page 8, second column, line 44, claim 18, for Ua" read an annular; and line 45-46, claim 18, strike out the word "annu1ar"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of January, A. D. 1936.

Leslie Frazer (Seal) .Acting Commissioner of Patente.