Fluid sprinkling – spraying – and diffusing – Flow deflecting or rotation controlling means – Unitary deflector with multiple fingers or serrated edges
Patent
1988-01-05
1989-12-26
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Flow deflecting or rotation controlling means
Unitary deflector with multiple fingers or serrated edges
239499, 239504, 239523, B05B 134
Patent
active
048892874
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a jet spray sprinkler more particularly to a jet spray sprinkler of the type commonly of small dimensions.
DESCRIPTION OF PRIOR ART
One particular type of sprinkler is disclosed in U.S. Pat. No. 3,815,831 and Australian Patent No. 459,874. Such a sprinkler comprises a body, a passage through the body having an inlet and outlet end, means associated with the inlet end for connecting it to a supply source of water, and a distribution cap located over the outlet end. The cap has a skirt extending away from the body, a closed end remote from the body and a series of outlet perforations through the wall of the cap, the series extending at least part way around the periphery of the cap. The cap where the water impinges on the end thereof has an at least part conical surface with the apex of the conical surface directed towards the outlet end of the passage, and the longitudinal axis of the conical surface being in line with the longitudinal axis of the outlet end. The perforations are formed by an external step decrease in diameter of the cap combined with a riffling or serrating of the inner surface of the closed end of the cap so that the troughs of the serrations or riffles and the said external step decrease defines the perforations, with the peaks of the serrations or riffles connecting the said end of the skirt.
Australian Patent No. 475,112 shows a similar sprinkler but the cap is freely rotatable, and the perforations are shaped such that the water flow through the perforations causes rotation of the cap.
Other types of sprinklers are known but these are of the open type, i.e. they do not utilise a cap to enclose the jet or nozzle. In these instances the jet or nozzle is exposed, with the jet impinging on an anvil supported above the jet or nozzle.
It is an object of the invention to provide a jet spray sprinkler which has an improved performance and also ease of manufacture.
BRIEF STATEMENT OF THE INVENTION
Thus there is provided according to the invention, a sprinkler having a body having an inlet end and an outlet end with a passage therethrough, means for connecting the inlet end to a source of water supply, and a distribution cap on the sprinkler extending over the outlet end of the passage, the cap having a skirt to engage the body and extend away from the body, the cap at its upper end having on its outer surface a conical shape tapering toward the closed end of the cap, the interior of the closed end of the cap having a surface of revolution defined by rotating a curve around the axis of the cap, perforations which extend at least part way around the cap being defined by the conical shape of the external wall combined with serrating the inner surface of the surface of revolution adjacent the external wall.
BRIEF DESCRIPTION OF THE DRAWINGS
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,
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 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.
The body 1 preferably has a hexagonal portion 5 to facilitate the insertion into the tube of plastics material by a suitable tool, the body adjacent the hexagonal portion on the side opposite to the extension 3, having a peripheral groove 6 into which the cap 2 is adapted to be snap-fitted, the cap 2 having an internal bead 7 to engage in the peripheral groove.
The body of the sprinkler has a longitudinal passage 8 therethrough, the passage 8 terminating in a small aperture 9 forming the jet of water to
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Hemsley Stephen T.
Roszowski Bogdan
James Hardie Building Products Pty. Limited
Kashnikow Andres
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