ROSZKOWSKI BOGDAN (AU)
| US3815831A | 1974-06-11 | |||
| US1805782A | 1931-05-19 | |||
| US4391410A | 1983-07-05 | |||
| US1727111A | 1929-09-03 | |||
| US4401273A | 1983-08-30 | |||
| US4199105A | 1980-04-22 | |||
| GB817998A | 1959-08-12 |
| 1. | A sprinkler having a body, an inlet end at one end of the body and an outlet end at the opposite end of the body, a passage through the body, means for connecting the Inlet end to a source of water supply, a nozzle at the outlet end, a distribution cap having an open end and a closed end fitted 5 over the outlet end by a skirt engaging the body, the outer surface of the cap having a conical shape tapering towards the closed end of the cap, the Interior of the closed end of the cap being formed of a surface of revolution defined by rotating a curve around the longitudinal axis of the cap, and perforations which extend at least part way around the cap being defined by o. the conical shape of the external wall combined with serrating the surface of revolution adjacent the external wall. |
| 2. | A sprinkler as defined in claim 1 , wherein the end outer surface of the closed end of the cap Is planar, and the conical surface terminates at the planar end. |
| 3. | A sprinkler as defined in claim 2, wherein the surface of revolution defines a cusp axial ly of the cap, said cusp extending toward said outlet; and the surface of revolution smoothly curving toward said apertures. |
| 4. | A sprinkler as defined in claim 2,j wherein the apertures are separated by ribs, the ribs being formed by the ei ls of the ridges of the serrations. |
| 5. | A sprinkler as defined in claim 4, wherein said apertures are triangular. |
| 6. | A sprinkler as defined In claim 4, wherein said apertures are rectangular. |
| 7. | A sprinkler substantially as described with reference to the accompanying drawings. |
This inventionrelates toajetspraysprinklermoreparticularlyto ajetspraysprinklerof thetypecommonlycalledamicro-sprinkler.
DESCRIPTIONOF PRIOR ART
5. Micro-sprinklersareknownandoneparticulartype isdisclosedin U.S. PatentNo.3,815,831 andAustralian Patent No.459,874. Sucha sprinklercomprisesabody,apassagethroughthebodyhavinganinlet andoutletend, meansassociatedwiththe inletendforconnecting ittoa supplysourceofwater,andadistributioncap locatedovertheoutlet lo. end. Thecaphasaskirtextendingawayfrom thebody, aclosedend remotefrom thebody andaseriesofoutletperforationsthrough the wall ofthecap, theseriesextendingat least partwayaroundthe peripheryofthecap. Thecapwherethewaterimpingesontheend thereofhasanat leastpartconical surfacewiththeapexoftheconical is. * surfacedirectedtowardstheoutletendofthepassage, andthe longitudinal axisof theconical surfacebeing in linewiththe longitudinal axisoftheoutletend. Theperforationsareformedbyan external stepdecreaseIndiameterofthecapcombinedwitharifflingor serratingofthe innersurfaceoftheclosedendofthecapsothatthe
20. troughsoftheserrationsorrifflesandthesaidexternal stepdecrease definestheperforations, withthepeaksoftheserrationsorriffles connectingthesaidendoftheskirt.
Australian PatentNo.475,112showsasimilarsprinklerbut thecap isfreelyrotatable, andtheperforationsareshapedsuchthatthewater 25. flow throughtheperforationscausesrotationofthecap.
Othertypesofsprinklersareknownbuttheseareoftheopentype, I.e. theydonotutiliseacaptoenclose thejetornozzle. Inthese Instancesthejetornozzle isexposed, withthe jet impingingonananvil supportedabovethejetornozzle.
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30. It isanobjectofthe invention toprovideajetspray sprinkler whichhasanimprovedperformanceandalsoeaseofmanufacture.
BRIEFSTATEMENTOFTHE INVENTION
Thusthere isprovidedaccording to the invention, asprinklerhavinga bodyhavingan inletendandanoutletendwithapassagetherethrough, meansforconnectingtheinletend toasourceofwatersupply, anda 5. distributioncapon thesprinklerextendingovertheoutletendofthe passage, thecaphavingaskirttoengagethebodyandextendaway from the body,thecapat Itsupperendhavingon itsoutersurfaceaconical shape taperingtowardtheclosedendofthecap, the interioroftheclosedendof thecaphavingasurfaceofrevolutiondefinedbyrotatingacurvearoun dthe 10. axisofthecap,perforationswhichextendat leastpartwayaround thecap beingdefinedbytheconical shapeoftheexternal wall combinedwith serratingthe innersurfaceofthesurfaceofrevolution adjacentthe external wall.
BRIEF DESCRIPTION OF THE DRAWINGS
is. in order to more fully describe the invention, reference will now be made to the accompanying drawings in which:
FIG. 1 is a side elevation of a sprinkler showing the body with the cap fitted thereto,
FIG. 2 is a cross-sectional view of the body and the cap, 20. FIG. 3 is a sectional view along the lines 3-3 of FIG. 2,
FIG. 4 shows a side elevation of a further form of the invention, and FIG. 5 is a cross-sectional view of the embodiment of FIG. 4.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring firstly to FIGS. 1 to 3, the sprinkler comprises a body 1 and a 25. cap 2, the body 1 having an extension 3 which is threaded and has an inclined end 4 to facilitate insertion into an aperture formed in a supply pipe of plastics material.
Thebody 1 preferablyhasahexagonal portion5tofacilitatethe Insertion Intothe tubeofplasticsmaterial byasuitabletool, thebody adjacent thehexagonal portiononthesideoppositetothe extension3, havingaperipheral groove6 Intowhich thecap2 is adaptedtobesnap- 5 . fitted, thecap2havinganInternal bead7toengagein theperipheral groove.
Thebodyofthesprinklerhasa longitudinal passage8therethrough, thepassage8terminatinginasmall aperture9formingthejetofwaterto impingeontheclosedend 10ofthecap.
o. Thecap2hasaperipheral skirt 11 andtowards itsupperendhasan external conical surface 12extendingtoward thetopsurface 1 ofthecap. Aseriesofperforations 14areformed intheconical surface 12,the perforationsextendingat leastpartwayaroundtheperipheryoftheconical surface,theextensionoftheperforationsdependingupontheangular area is. tobewateredbythesprinkler.
The internal surfaceofthetop 10ofthecapisdefinedasacurved surface 15formedbyrotatingacurvearoundtheaxisofthesprinkler,the axisbeingdirectedtowardthejet9 Inthebody.
Theperforationsareformedthroughtheconical surfaceofthecap, the 20. perforationsthroughthiswall beingformedbetweenribs 16whichsupport thetopofthecapfrom theskirt 11. TheportionIndicated 17 Isshownasa sectionthroughoneoftheribs 16. The Innersurfaceoftheribs 16extend from theedgeportionofthecurvedsurface 15tothe internal sidewall of theskirtbelow theperforations 14.
25. Thus theperforationsareformedthroughthewall ofthecapandare definedbytheconical shapeoftheexternal wall combinedwiththe serrationsofthe innersurfaceadjacenttheexternal wall surface.
Bythe internal surfaceoftheclosedendofthecap havingasurfaceof revolutiondefinedbyrotatingacurve itwill beseenthatanimproved 30. performance Isobtainedduetothewatersmoothlyflowingoverthiscurved
surfacethusreducingwaterpressure loss insidethecap, thus increasing thewateringradius.
Byformingthecapwithaconical shapeandformingtheperforations oraperturesintheconical wall, thisallowsforeasyandexactcontrol over 5 . theshapeoftheperforations.
TheseperforationsareshowninFIG.1 asbeingrectangularbut it isto berealizedthattheycanbeofothershapessuchastriangularor trapezoidal dependinguponananglebetweentheexternal wall andthe internal serrations.
o. Turningnow toFIG.4,afurtherembodiment isshown,againhaving curvedinnersurface 15butwiththeserrationsbeing formedastriangular, itbeingnotedthatthe internal edge 19oftheribs20isofgreaterangle thanthatshownInFIG.2.
Thusthere isprovidedaccordingtothe invention, an improved is. sprinklerwhichallowsforeaseandexactcontrol overtheshapeofthe perforationsandhas improvedperformanceduetoreducedpressure loss withinthecapitself.
Althoughvariousformsoftheinventionhavebeendescribed insome detail it istoberealizedthattheinventionisnottobe limitedtheretobut 20 . can includevariousmodificationsfallingwithinthespiritandscopeoft he invention.
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