US 3144034 A
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Description (OCR text may contain errors)
A119411; 1954 .1. B. LYMAN E'rAl.
LIQUID SPRAY APPARATUS Filed sept. 19, 1961 3,144,034 LEQUHD SPRAY APPARATUS John E. Lyman, Minneapolis, and Wallace E. Lind, Anoka, Minn., assignors to Whirlpool Corporation, a corporation of Delaware Filed Sept. 19, 1961, Ser. No. 139,114 7 Claims. (Cl. 134-176) This invention relates to spray devices and in particular to moving-path spray devices.
In apparatus such as dishwashers, lawn sprinklers, container cleaners and the like it is desirable to provide aV spray issuing in a moving path so as to deliver the liquid to substantially all portions of a preselected space or area. The present invention is concerned with a new and improved moving-path spray device providing improved functioning in such apparatus.
Thus, a principal feature of the present invention is the provision of a new and improved spray device.
Another feature of the invention is the provision of such a spray device having a simple, economical construction while yet providing an improved moving-spray operation.
A further feature of the invention is the provision of such a spray device wherein a rotatable deflector lis waterbuoyed, providing improved trouble free operation.
Still another feature of the invention is the provision of such a spray device adapted for use in apparatus such as dishwashers for providing improved washing liquid distribution to the upper portion of the Washing space.
Other features and advantages of the invention will be apparent from the following description taken in connec- FIGURE is a perspective view of the deflector of the spray device.
In the exemplary embodiment of the invention as disclosed in the drawings, a dishwasher generally designated 10 is shown to comprise an outer enclosure 11 within which is mounted a tub 12 having a bottom 13 spaced above the bottom Wall 14 of the enclosure 11. A lower y basket 15 is disposed within the tub 12 adjacent bottom 13 and an upper basket 16 is disposed within the tub adjacent the upper end 17 thereof. Washing liquid passing downwardly through a screen 18 to a sump 19 is pumped, by means of a pump 20 driven by an electric motor 21, upwardly through a hose 22 to a spray arm 23 rotatably mounted on a hub 24 ixedly secured to a drawn portion 25 of the tub bottom 13. The spray arm is provided with a plurality of upwardly opening ports 26 from which the washing liquid issues in the form of a forceful jet-like stream so that as the spray arm revolves, the washing liquid is forceably delivered to substantially all portigns of the space within the tub 12. Illustratively, the pump 20 may be arranged to deliver approximately 31 gallons per minute at a head of 25 feet through the spray arm 23.
To provide an improved delivery of the washing liquid to the upper portion of the space within tub 12, a second spray device generally designated 27 is mounted on the upper end 28 of a tubular duct 29 xedly secured to stationary hub 24. A portion of the washing liquid delivered from pump 20 is diverted to pass upwardly through duct 29 by means of a diverter 30 extending to within the lower end 31 of the duct 29. As best seen in FIGURE l, the spray portion of the space within tub 12 adjacent upper end 17 to deliver the washing liquid directly to this portion of` the space.
Referring now more specically to FIGURES 2 through 5, the spray device 27 may be seen to comprise a hub generally designated 32 having a tubular lower end portion 33 fixedly fitted to the upper end 28 of the duct 29,
-a tubular lower mid-portion 34 having a slightly reduced inner diameter and defining at its lower end an annular radial shoulder 35a abutting the upper end of the duct,
an inturned upper mid-portion 35, `and -a tubular inwardly yspaced upper end portion 36 having a closed upper end wall 37. Upper mid-portion 35 defines an upwardly facing, annular radial surface 38, and the lower end of portion 36 defines a plurality of flow passages 39 opening at their upper ends vertically through surface 3S and communicating at their lower ends with the space 40 within` the hub 32. The upper part of upper end portion 36 is provided with a plurality of flow passages 41 opening radially outwardly into the annular space 42 circumjacent` the end portion 36 and communicating inwardly with the internal space 40 of the hub 32.
An annular deector 43 is mounted for free rotation on the upper end portion 36 of the hub in overlying relationship with surface 38. As best seen in FIGURE 5,
deector 43 defines a plurality of vanes 44 each curving from a base portion 45 extending substantially in a transaxial plane perpendicular to the axis of the dellector to a tip portion 46 extending at a substantial angle thereto, A
herein over 45 relative to the transaxial plane.
Spray device 27 further includes a cup-shaped cap 47 provided with a transverse end portion 48 facially secured to the end wall 37 of the hub by suitable means such as screw 49. The downturned side wall 50 of the cap 47 defines the radially outer boundary of annular space j 42 and extends downwardly to slightly above the midportion 45 of the deilector 43.
As indicated briey above, a portion of the washing liquid delivered from pump 20 is directed by diverter 30 upwardly through duct 29. A portion of this washing liquid is directed through ow passages 39 to strike the underside of deflector portion 45 thereby lifting the deflector to space it upwardly of the hub portion 35 thereby eiectively eliminating frictional engagement of the de-V lector with the hub portion 35. A second portion of the washing liquid delivered from duct 29 passes outwardly through flow passages 41 into annular space 42 wherein it is redirected by the cap 47 to flow substantially Vertically downwardly and strike the upper surface of the deflector mid-portion 45. This portion of the washing liquid then ows radially outwardly to pass between the deflector and the lower end of the cap portion 5i) and in doing so impinges on the Vanes 44 thereby causing the deilector to rotate about the axis of the spray device.
As shown in FIG. 2, the washing liquid passing over the portion of each Vane extending generally transaxially (the leftward illustrated vane portion) issues from the spray device generally in the transaxial plane. The portion of the washing liquid impinging on the most curved portion of each vane (the rightward vane portion in FIG. 2) is deflected thereby at a substantial angle to the transaxial plane, and in the illustrated embodiment at an angle of over 45 thereto. Thus, the path of the washJ ing liquid issuing from the spray device taken in any selected axial plane (e.g., the plane of the paper) varies from a path generally parallel to the transaxial plane (i.e., a plane perpendicular to the plane of the paper and the axis of the deflector) to a large angle to the transaxial plane as the deflector spins around on the hub.
Patented Aug. 11, 1964 device 27 is disposed at the bottom of the upper portion of the'tub 12 effectively assures full, thorough washing of the elements th'erein.
The spray device 27 may be utilized in other apparatus;
such as containercleaningapparatus or sprinklers. The
improved uniform distribution of the liquid provided bythe spray device assures uniform delivery to -the circumjacent space and the limitationoffthe vmovement ofthe individual droplets substantially-to axial planes-assures effectively maximum utilization of theliquid pressure in the outward force of the spray, The'buoyin'g-of the deflector by the liquid passing upwardly through the passages 39 against the underside thereof effectively assures long, trouble-free operation asfriction is effectively minimized. Further, the utilization of the outwardly issuing water -1t self to effect therotation of the deflector eliminates theV need for driving-mechanism, ygreatly simplifying the associated structure Vand thereby effectively minimizing the cost of the apparatus. K
Having described your invention as related to thev embodiment shown in the accompanyings, it is our intention that the invention benot limited byV any of therdetails of;
description, unless otherwise specified, but ratherbe construed broadly within'itsv spirit and lscope as set out in the accompanying claims.
The embodiment of the invention in which an exclusive property or' privilegeis claimed as defined as follows: 1. In a washer apparatus havingA means defininga washing space including a lower and anupper portion, andJ means in the lower portion-'forv forcibly distributing washing liquid through said space` to wash elements such as dishes and the like therein, means for forcibly distributing washing liquid through said upper portion comprising: a
fixed duct having an outlet end at the`bottom of the upperv space portion for delivering washing liquid under pres-v sure upwardly thereto; defiecting means movablycarried` by said duct end; andrmeans for directing washing liquid delivered through said duct'against both the top and the bottomlofthekdeflecting means to supportthe defiecting means on the liquid being delivered, said deflecting directing the ywashing liquiddelivered throughsaid 'duct end onto the top thereof into a path vertically reciprocating through said upper space portion.
2. A sprayfdevice comprising: a hub having afirst portion defining an upper transverse surface, and a second portion extending upwardly therefrom, said surface extending circumjacent the inner end of said second portion, said first portion defining a first .tiow passage opening through said surface for directing liquid upwardly therefrom, said second portion defining a second fiow passage for directing liquid to the space the deflector rotatively about the axis of'saidsecond issue laterally away from saidv portion of the hub and to space in a spray path, the rotation of said defiector vane causing reciprocation of said spray path in a plane of said axis.
3. The spray deflector ofclaim 2 wherein said liquid directing means comprises a cup-shaped member co- IIICBHS Y adjacent said-j second portion; a deflector extending-rotatably aroundV 'said space axially secured to the outer end of said second portion and opening downwardly toward said surface.`
4. A spray device comprising: a hub having a lirst vertical cylindrical portion detining an upper, planar, transverse surface, and a second cylindrical, diametrically reduced portion extending lcoaxially upwardly therefrom, said firstl portion defining aplurality of first fiow passages each Yopening through saidsurface parallel to the axis of the hub for directing liquid upwardly therefrom, said second portion defining a'plurality of second flow passages for directi'ngliquidradially outwardly therefrom to the circurnjacent space; a deliector extending rotatably around lsaid 'hub secondportion and transaxially across said space adjacent said surface tol be supported spaced from saidr surface byliquid passing outwardly through said rst flow passage, of circumferentially related Vanes; and means directing liquid from said second flow passages to impinge downwardly on said lvanes andy propel` the deiector rotatively about the axis of said hub second portion and to issue laterally away from said space in a spray path, the rotation of said' deflector'causing said vanes to reciprocate said spray path parallel to the axis of said hub;
5. The spray device of claim 4 wherein said liquid directing means comprises a cap having a transverse end portionfsecured to the outer end of said hub second portion, and a tubular portion extending concentrically of'said hub'second portion and downwardly from said end portion to adjacent said deflector.
6. The spray deflector of claim 4 wherein said vanes are curved from a plane substantially perpendicular to` said axis to over 45 away from said plane to reciprocate said spray path through a corresponding angle.
'7.' For use in a washing-apparatus having means defining a washing space including a lower and an upper portion, and means inthe lower portion for forcibly distributing washing liquid through said space to wash elements such as dishes and the like therein, means for forcibly distributing washing-liquid through said upper portion comprising:A a fixed duct extending vertically in the washing space including an'outlet hub at the bottom of the upper spaced portion,'said hub having a first portion dening an upper transverse surface, and a second portion extending upwardly therefrom, said surface extending Circumjacent the inner end of said second portion, said first portion defining a first lflow passage opening through said surfacefor directing liquid upwardly therefrom, said second portion defining a second flow passage for directing liquid to the space adjacent said second portion; a defiector extending Yrotatably around said second portion and transversely across said space adjacent said surface to be supported spaced -above said surface by liquid passing upwardly through said first flow passage, said defiector defining a vane; and means directing liquid from said second fiow passage downwardly toward said surface to irnpinge on'said vane and propel the deector rotatively about theV axis of saidsecondportionof the hub and to issue laterally away from said space in a spray path, the rotation of said deflector Vane causing reciprocation of saidspray path in a plane of said axis.
References' Citedin the file of this patent UNITED STATES PATENTS said detiector defining a plurality