US 4,790,481 A · Pop-up irrigation sprinkler

Abstract

A pop-up irrigation sprinkler which includes a riser which is forced by water pressure up out of a body through a cover attached to the top of the body. The riser is normally held in a retracted position by a coil spring. A nozzle is removably attached to the upper end of the riser. An adjustable screw is threaded into the nozzle to adjust the flow rate of water through the nozzle to control both the flow rate and the radius of the watering pattern. An elongated filter is removably mounted on the inner end of the nozzle, and the filter extends down into the riser. The filter has a head having an orifice therein and which defines a conical seat for the screw. An adapter is interposed between the nozzle and the riser and serves to trap the head of the filter to enable different types of nozzles from different manufacturers to be used in the sprinkler.

Claims8

Dependent claims

In a pop-up irrigation sprinkler assembly which includes:

a tubular body having an opening in the lower end thereof for connection to a pressurized water source;
a cover attached to the upper end of said body and having a central aperture therein;
a riser mounted in said body and movable therein from a retracted position to a position in which it extends upwardly through the aperture in said cover in response to water pressure in said body;
and resilient means mounted in said body for biasing said riser to its retracted position, the combination of:
a nozzle removably mounted to the upper end of said riser;
and an elongated filter mounted on the lower end of said nozzle to be removable from said riser with said nozzle and attached to said nozzle extending coaxially down into said riser.

3 more elements

Dependencies are inferred from the claim text.

Pop-up irrigation sprinkler

Life of this patent

Pop-up irrigation sprinkler

Life of this patent

Abstract

Claims8