Fluid sprinkling – spraying – and diffusing – Motor or spray fluid operated continuously moving discharge... – Spray fluid operated
Patent
1981-07-15
1985-02-12
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Motor or spray fluid operated continuously moving discharge...
Spray fluid operated
239453, B05B 306, B05B 308
Patent
active
044986289
DESCRIPTION:
BRIEF SUMMARY
This invention relates generally to sprinklers of the known type which have a rotating head so arranged that when water is projected axially to the head and is guided by a curved channel to issue from the rotating head, the reaction causes the head to rotate.
In this type of sprinkler the rotating head has an upwardly projecting shaft which fits in a bearing supported by arms projecting upwards from a socket member by means of which the device is connected to a water supply line, the head rotating within a space formed between the arms.
It is known that in butterfly sprinklers of this type certain problems can occur, one being caused through the bearing for the rotating head having grit introduced into it with resultant wear and deteriorating rotation, and it is also known that the rotating head can be removed under some circumstances when not in operation by birds withdrawing the head from its bearing as the head when not raised is in a lowered position with its shaft partly withdrawn from the bearing, the head being raised during operation by the force of the water directed against its underside as it flows along the curved channel of the head.
Various other disadvantages exist with sprinklers of this type and it is an object of the present invention to provide certain improvements which will remove such disabilities.
It is an object of the invention to so arrange the sprinkler assembly that the shaft on which the rotating head operates will be protected against contamination by dirt.
It is a further object of the invention to provide effective supporting means for the rotating head when not lifted by the flow of water to ensure that it cannot be readily removed from the frame in which it operates.
It is a still further object of the invention to give closer control of the rate of rotation of the head and also to provide a flow regulator to ensure best operation in relation to pressures existing at the time.
The objects of the invention are achieved by forming the sprinkler with a rotational head supported from a body having at least one upstanding arm supporting a bearing in axial alignment with an orifice in a jet in the said body, characterised by a shaft upwardly projecting from the said head and arranged to engage in the bearing, the shaft having a larger diameter portion at the rotational head, the bearing having a depending skirt arranged to encircle the larger diameter portion of the shaft to form a protective shroud against ingress of foreign matter to the bearing, further characterised in that the bearing is positionable to allow the rotating head to be positioned over the jet and then held confined with some axial movement between the bearing and the body when the bearing is axially positioned.
The invention also includes means to limit lateral displacement of the lower end of the rotating head to restrict damage to the head by birds or animals or removal of the head by birds which is common with butterfly sprinklers known heretofore.
The assembly may also include pressure control means and a screen to remove solids from the water flowing through the sprinkler.
In order however that the invention may be more fully understood, an embodiment will now be described with reference to the accompanying drawings in which
FIG. 1 is a part sectional side elevation of a preferred form of the sprinkler,
FIG. 2 is a sectional plan of same on line 2--2 of FIG. 1, and
FIG. 3 is a side elevation of a modified form of the invention.
The sprinkler illustrated in FIGS. 1 and 2 comprises a body 1 having a screw thread 2 whereby it can be secured to a stand pipe or the like, and has two arms 3--3 projecting upwardly to a bearing 4 which is located in a bore 5 at the junction of the arms, which arms 3--3 define a space in which the rotating head operates.
The rotating head 6 has an upwardly projecting shaft 7 which engages in the bearing 4, the shaft 7 and socket 8 of the bearing 4 being dimensioned so that when water pressure is exerted on the rotating head 6, the head is lifted into an upper operating position wi
REFERENCES:
patent: 3677472 (1972-07-01), Hart et al.
Kashnikow Andres
Peterson Gordon L.
RIS Irrigation Systems Pty Ltd
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