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US 4,361,278 AGranted
Irrigation sprinkler
OwnerDonald J. Finleyinventor
Life of this patent
Estimating the term…
Abstract
An irrigation sprinkler which produces a high-velocity core stream and a pulsating low-velocity peripheral stream is provided. The irrigation sprinkler includes an aeration chamber having an aeration port through which air enters the aeration chamber and mixes with the outer surface of a stream of water passing through the aeration chamber.
Claims3
An irrigation sprinkler comprising:
- (a) a sprinkler body rotatably mounted on a source of water such that said sprinkler body may rotate on an axis;
- (b) a nozzle attached to said sprinkler body having an interior bore for radially outward and generally upward ejection of a stream of water from said nozzle;
- (c) an aeration chamber attached to said nozzle having a side wall, an outlet port, and an aeration port, said outlet bort being downstream of said nozzle and said outlet port being of a greater diameter than said interior bore of said nozzle, said aeration port being disposed in said side wall such that air enters a cavity within said aeration chamber through said aeration port and mixes with said stream of water ejected from said nozzle to form a core stream and a peripheral low-velocity stream;
- and
- (d) said aeration port being located in said side wall of said aeration chamber at a location such that a quantity of water retained within said cavity of said aeration chamber intermittently blocks said aeration port thereby causing repetitive surging of said peripheral low-velocity stream.
2 more elements
A method of irrigation sprinkling comprising:
- ejecting from a sprinkler body a water stream having a core stream surrounded by a peripheral stream having a lower velocity than that of said core stream;
- forming said peripheral stream by mixing air with an outer surface of said core stream;
- deflecting a portion of said peripheral stream thereby imparting rotational motion to said sprinkler body;
- and
- intermittently interrupting said mixing of air into said core stream outer surface such that said peripheral stream surges repeatedly.
2 more elements
Dependencies are inferred from the claim text.