US 3,940,066 A · Pop-up sprinkler head having flow adjustment means

Abstract

A pressure control mechanism for an irrigation sprinkler having a rotatable riser with an orifice of predetermined shape with the riser sealed at the water inlet end thereof. In one embodiment, a stationary valve ring is snug-fit around the riser and circumferentially stationary with respect to the riser. The valve ring is spring biased against a shoulder on the riser at the inlet end and adapted to rise with the riser. The valve ring has an orifice which is congruent to the orifice of the riser whereby rotation of the riser with respect to the stationary valve ring regulates the flow of water through the valve orifice and the riser orifice to thereby regulate the flow of water through the sprinkler. In an alternative embodiment, a valve disc is secured to the inlet end of the riser and is circumferentially stationary with respect to the riser. The riser has a plug fixedly mounted at the inlet end and is keyed for limited rotation. Both the valve disc and the riser have orifices which are congruent whereby rotation of the riser with respect to the stationary valve disc regulates the flow of water through the valve orifice and the riser to thereby regulate the flow of water through the sprinkler.

Claims13

Dependent claims

In an improved versatility sprinkler for varying the flow rate of fluid through a sprinkler head having a housing for receiving water under pressure and riser means mounted therein, said riser means having an inlet end within said housing and a discharge end, exteriorly of said housing, the improvement comprising:

first means formed at the discharge end of said riser means for adjusting the area of coverage of the fluid discharged from said riser means;
and
second means associated with the inlet end of said riser means within said housing for adjusting the rate of flow of fluid from said housing into said riser in response to rotational movement of said riser means relative to said housing independently of the adjustment of said first means whereby the area of coverage of the fluid discharged from the riser means may be independently adjustable through manipulation of said first means and the flow rate of fluid discharged into the selected area of coverage is independently adjustable exteriorly of said housing through manipulation of the discharge end of said riser means.

In a sprinkler head construction having a housing adapted to be connected to a source of water under pressure, a riser means mounted to said housing with an inlet end within the housing and an outlet end exteriorly of the housing and means formed at the discharge end of said riser means for adjusting, exteriorly of the housing, the area of coverage of the water discharged, the improvement comprising the provision of:

valve means associated with the inlet end of said riser means within said housing for adjusting the rate of flow of water from said housing into said riser means in response to rotational adjustment, from the exterior of said housing, of said riser means independently of the adjustment of said means formed at the discharge end of said riser means.

A sprinkler head including a housing having a water inlet and an outlet comprising:

riser means associated with said housing and including an upper discharge end protruding through said housing outlet and a lower water inlet end having a riser inlet orifice for receiving water from within said housing and directing it out through said discharge end exteriorly of said housing, said riser means being mounted to said housing for relative rotation thereto;
and
valve means within said housing and inlcuding a valve orifice adjustably registerable with said riser inlet orifice upon relative rotation between said riser means and valve means for controlling the flow of water from said housing into said riser, said valve means being non-rotatably mounted to said housing whereby the flow rate of water emitted through said riser means may be adjusted exteriorly of said housing by manual rotational adjustment of said protruding riser discharge end relative to said housing and valve means.

Dependencies are inferred from the claim text.

Pop-up sprinkler head having flow adjustment means

Life of this patent

Pop-up sprinkler head having flow adjustment means

Life of this patent

Abstract

Claims13