US Patent No. 9,578,817

VALVE-IN-HEAD IRRIGATION SPRINKLER WITH SERVICE VALVE


Patent No. 9,578,817
Issue Date February 28, 2017
Title Valve-in-head Irrigation Sprinkler With Service Valve
Inventorship Richard M. Dunn, Carlsbad, CA (US)
Santo Uccello, San Marcos, CA (US)
Assignee Hunter Industries, Inc., San Marcos, CA (US)

Claim of US Patent No. 9,578,817

2. An irrigation sprinkler comprising:
an inlet configured to connect to a pressurized water supply;
a main valve mounted downstream of the inlet;
a pilot valve having an inlet and an outlet, wherein operation of the pilot valve is configured to cause the main valve to
open or close; and

a service valve comprising:
a first port configured to hydraulically communicate with the main valve;
a second port configured to hydraulically communicate with the inlet of the pilot valve;
a third port that communicates to a vent; and
a moveable valve component configured to create an open hydraulic communication path between the pilot valve inlet and the
main valve in a first position, to create an open hydraulic communication path between the main valve and the vent in a second
position, and to block hydraulic communication between the main valve and the vent in a third position.