EP0177128A2 - Rasensprüher - Google Patents

Rasensprüher Download PDF

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Publication number
EP0177128A2
EP0177128A2 EP85305206A EP85305206A EP0177128A2 EP 0177128 A2 EP0177128 A2 EP 0177128A2 EP 85305206 A EP85305206 A EP 85305206A EP 85305206 A EP85305206 A EP 85305206A EP 0177128 A2 EP0177128 A2 EP 0177128A2
Authority
EP
European Patent Office
Prior art keywords
chamber
water
rotor
housing
lawn sprinkler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85305206A
Other languages
English (en)
French (fr)
Other versions
EP0177128A3 (de
Inventor
Joseph Felix Caruana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0177128A2 publication Critical patent/EP0177128A2/de
Publication of EP0177128A3 publication Critical patent/EP0177128A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/0486—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet the spray jet being generated by a rotary deflector rotated by liquid discharged onto it in a direction substantially parallel its rotation axis

Definitions

  • the present invention relates to lawn sprinklers, that is, to devices adapted to be connected to the end of a water hose to provide a fine spray bf water droplets over an area of lawn on which the device is positioned.
  • a number of different types of lawn sprinkler device are already known.
  • One such device comprises a rotating nozzle from which a spray of water emerges as the nozzle rotates through 360°.
  • Another such device comprises a horizontal bar containing a row of holes through which water jets emerge, the bar being arranged to be repeatedly pivoted about its longitudinal axis through an angle of at least 90° in order to achieve the required spray spread.
  • Neither of the aforegoing devices is very efficient in that the area covered is relatively narrow. Frequent repositioning of the device is therefore necessary to achieve adequate spray coverage.
  • Another type of known device employs a profiled blade member which is pivotally suspended above a vertically directed water jet, and is shaped so as to be rotated by virtue of the water pressure acting on its one side surface, the rotation of the blade being arranged to cause the water to be flung out generally horizontally over a 360° arc.
  • This latter device has two particular disadvantages. Firstly, it is a relatively complicated device requiring a number of relatively expensive parts which have been made of metal in such devices. Secondly, it is found that the rotating blade member used in such devices is not very efficient in distributing the water in the radial direction so that the resulting area sprayed tends to be in a narrow annular band spaced some feet from the position of the device; a circular area around the device is left substantially unsprayed.
  • Another known device comprises an upwardly divergent, frusto-conical member which is mounted for free rotation about a vertical axis above a fixed housing.
  • An annular jet of water is arranged to be directed upwardly over the frusto-conical surface so as to impinge on a plurality of tangentially directed vanes carried by said surface and thereby cause the frusto-conical member to rotate about said axis.
  • the water In rotating, the water is thrown generally upwardly and outwardly so as to form a spray which covers a 360° area around the device.
  • the latter device has a number of practical disadvantages. Its principal disadvantage is that is requires at least six separate components which thereby raises its cost of production. It is found to operate satisfactorily over only a relative narrow range of water pressures. Furthermore, the construction of the known device is such that a body of water becomes trapped inside the frusto-conical component. This water tends to move around non-uniformly within the frusto-conical component and can cause vibration of the device which reduces its operational efficiency.
  • a lawn sprinkler comprising a generally cylindrical chamber of circular section to which pressurised water is arranged to be supplied in a manner to establish a body of swirling water in the chamber, and a coaxial, freely rotatable rotor which carries a plurality of angularly spaced, generally radially directed vanes, at least part of which project into said chamber so as to be driven by said body of swirling water to thereby rotate the rotor.
  • the vanes of the present sprinkler lie in respective planes containing the axis of rotation of the rotor.
  • the water leaves the chamber via divergent spaces between adjacent vanes and is distributed in an even spray over a full 360° angle.
  • the body of swirling (rotating) water is established by forcing water into the cylindrical chamber through a circular array of holes in a bottom wall of the chamber, the holes lying generally tangentially relative to the imaginary circle on which they lie so as to direct the water generally tangentially towards the cylindrical wall of the chamber so that the water then tries to follow a circular path around the inside surface of the chamber.
  • the cylindrical chamber can be defined by a cylindrical wall which is fixed relative to said base wall or can be defined by a cylindrical wall which rotates relative to said base wall and is fixed relative to the rotor.
  • the illustrated sprinkler device comprises a main plastics housing 10 defining an internal chamber (not shown) to which pressurised water can be supplied via an inlet connection 12, for example from a hose pipe connected to the mains water supply.
  • a secondary plastics housing 14 Screwed into the top of the main housing 10 so as to communicate with said internal chamber is a secondary plastics housing 14 having a hollow tubular portion 16 whose lower outer periphery is screw threaded at 15 for attachment to the main housing 10.
  • the upper end of the tubular portion 16 is substantially closed by a transverse wall 18.
  • Formed immediately above the wall 18 is an open-topped cylindrical chamber which is defined by a tubular wall 22 extending upwardly from the portion 16.
  • the tubular wall 22 can be formed by a separate sleeve slipped over the tubular portion 16 but, preferably, is formed as an integral moulding with the tubular part 16 and the transverse wall 18.
  • a rotor member 26 which comprises a cylindrical shank portion 28 integrally connected to a solid frusto-conical portion 30.
  • the portions 28, 30 have a central bore 32 (Fig. 3) which loosely receives a screw 34 whose free end is engaged in a correspondingly screw-threaded bore 36 disposed centrally of the transverse wall 18.
  • the underside of the wall 18 can have an integral boss portion 38 for increasing the strength and rigidity of the wall where it receives the screw 34.
  • the head 40 of the screw loosely engages the top surface 42 of the frusto-conical portion, preferably by way of a washer 44, such as to enable the rotor to rotate freely about the screw.
  • the frusto-conical surface 30 of the rotor 26 carries a plurality of angularly spaced, downwardly extending ribs or vanes 46 each of which lies in a respective plane containing the axis of rotation of the rotor, i.e. the planes of the various ribs or vanes 46 are essentially radial as compared to the initially described known device where the ribs lie in planes which are tangential in relation to the axis of rotor rotation.
  • the transverse wall 18 is formed with a circular array of through-holes 24 disposed coaxially in relation to said cylindrical chamber 22 with the individual holes 24 all extending generally tangentially of the circle on which they lie and also extending at an angle to the-common longitudinal axis of the tube 16 and the cylindrical chamber 20.
  • the arrangement of the holes 24 is such that when the tubular portion 16 is supplied with pressurised water via the main housing 10, water is forced through the holes 24 and into the cylindrical chamber 22 where it adopts a relatively uniform swirling motion around the peripheral wall of the cylindrical chamber 22 (i.e. following a generally circular path around the axis of the chamber 22) before being ejected from the upper end of the chamber between the rim of the chamber 22 and the frusto-conical rotor 26.
  • the lower ends of the axial ribs or vanes 46 are arranged to project into the upper end of the cylindrical chamber 20 so that they lie within the rotating mass of water in the chamber and are thereby carried around with that water at substantially the same speed as the water.
  • the water is able to leave the chamber 20 via the diverging channels 30 between the adjacent pairs of ribs 46 and is thus thrown out in a fine spray over a full 360° angle as the rotor rotates.
  • the shape of the main housing 10 is unimportant.
  • the part 16 could be integral with the housing part 10 or could be dispensed with altogether, for example, if the transverse wall 18 is actually part of the roof of the main housing. All that is essential in this respect, is the circularly sectioned chamber, the angled holes in the base of this chamber and the rotor having radial ribs which project into the chamber so as to be driven by the swirling water therein.
  • FIG. 4 A further possibility is shown in Fig. 4 where the wall defining the cylindrical chamber is arranged to rotate with the rotor itself.
  • a tubular skirt 52 is attached to or integrally moulded with the rotor so as to be coupled to the ribs about half way along their length.
  • the water emerges as before via the spaces between adjacent ribs, the only difference being that the wall 52 rotates with the rotor relative to the transverse wall 18' and the tubular portion 16' carrying same.
  • FIGs. 5 to 7 illustrate a further embodiment of the invention wherein like parts have been given the same reference numerals as in Figs. 1 to 3.
  • the cylindrical chamber 20 is defined by a generally cup-shaped member 56 whose base 58 defines a transverse wall equivalent to the wall 18 of Fig. 2.
  • the wall 58 contains a circular array of angled through-bores 24 as before.
  • the outer peripheral surface of the cup-shaped member 56 is screw-threaded at 60 and is received within a correspondingly screw-threaded bore 62 in the roof of the housing 10.
  • the base 58 of the cup-shaped member 56 receives the screw-threaded end of the screw 34 on which the frusto-conical rotor 26 is mounted.
  • the upper end of the screw 34 carries a knob 64 to enable the screw to be easily manipulated manually. If the screw is released slightly from the base 58, the rotor is able to move upwardly by a corresponding distance on the screw, thereby increasing the gap between the mouth of the member 56 and the rotor and enabling the spraying characteristic of the device to be altered accordingly.
  • a spring clip 66 can be attached to the shank of the screw below the rotor so that when the screw is released by rotation of the knob 64 the rotor is automatically lifted by the spring clip 66.
  • the circularly sectioned chamber 20 is preferred for the circularly sectioned chamber 20 to be truly cylindrical, it will be appreciated that in principle the longitudinal wall of the chamber 20 could be somewhat divergent or convergent whilst still being capable of establishing the necessary rotating body of water therewithin. It is therefore intended that this possibility be included within the scope of the appended claims.
  • the present device can be made with as little as three components (plus washer if needed) if the main housing and tubular portion having the transverse wall are formed as an integral moulding; the other two components are the rotor and the screw.
  • Devices in accordance with the present invention are characterised by a particularly even dispersion of sprayed water, together with the ability to operate satisfactorily over a wide range of water pressures.

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  • Nozzles (AREA)
  • Catching Or Destruction (AREA)
EP85305206A 1984-07-27 1985-07-23 Rasensprüher Withdrawn EP0177128A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8419286 1984-07-27
GB848419286A GB8419286D0 (en) 1984-07-27 1984-07-27 Lawn sprinkler

Publications (2)

Publication Number Publication Date
EP0177128A2 true EP0177128A2 (de) 1986-04-09
EP0177128A3 EP0177128A3 (de) 1986-04-16

Family

ID=10564597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305206A Withdrawn EP0177128A3 (de) 1984-07-27 1985-07-23 Rasensprüher

Country Status (2)

Country Link
EP (1) EP0177128A3 (de)
GB (1) GB8419286D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011079534A1 (zh) * 2009-12-31 2011-07-07 广东联塑科技实业有限公司 一种升降式埋地喷头的驱动装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1010480A (fr) * 1962-12-19 1952-06-11 Mauser Kg Procédé et dispositif d'atomisation et de pulvérisation
US2949241A (en) * 1957-09-23 1960-08-16 Comet Metal Products Co Inc Lawn and crop sprinkler
FR2181401A5 (de) * 1972-04-19 1973-11-30 Le Roux Jooste Abraham
US4173308A (en) * 1978-04-24 1979-11-06 Loucas Savvides Sprinklers
EP0010925A1 (de) * 1978-10-30 1980-05-14 Irritech, Advanced Irrigation Technologies Spritz- oder Zerstäuberdüse
FR2485953A1 (fr) * 1980-07-02 1982-01-08 Bron Dan Buse de pulverisation a reglage automatique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949241A (en) * 1957-09-23 1960-08-16 Comet Metal Products Co Inc Lawn and crop sprinkler
FR1010480A (fr) * 1962-12-19 1952-06-11 Mauser Kg Procédé et dispositif d'atomisation et de pulvérisation
FR2181401A5 (de) * 1972-04-19 1973-11-30 Le Roux Jooste Abraham
US4173308A (en) * 1978-04-24 1979-11-06 Loucas Savvides Sprinklers
EP0010925A1 (de) * 1978-10-30 1980-05-14 Irritech, Advanced Irrigation Technologies Spritz- oder Zerstäuberdüse
FR2485953A1 (fr) * 1980-07-02 1982-01-08 Bron Dan Buse de pulverisation a reglage automatique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011079534A1 (zh) * 2009-12-31 2011-07-07 广东联塑科技实业有限公司 一种升降式埋地喷头的驱动装置
US8800888B2 (en) 2009-12-31 2014-08-12 Guangdong Liansu Technology Industrial Co., Ltd. Driving device for lifting buried spraying head

Also Published As

Publication number Publication date
EP0177128A3 (de) 1986-04-16
GB8419286D0 (en) 1984-08-30

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