US Patent No. 9,699,974


Patent No. 9,699,974
Issue Date July 11, 2017
Title Rotor-type Sprinkler With Pressure Regulator In Outer Case
Inventorship Michael L. Clark, San Marcos, CA (US)
Zachary B. Simmons, Escondido, CA (US)
Assignee Hunter Industries, Inc., San Marcos, CA (US)

Claim of US Patent No. 9,699,974

1. An irrigation sprinkler comprising:
an outer case having a case volume, a longitudinal axis, and having a first opening on a first end and a second opening on
a second end;

a riser positioned at least partially within the case volume and configured to extend through the second case opening having:
a riser inlet end having a riser inlet;
a riser outlet end;
an outlet housing connected to the riser outlet end; and
a riser outlet in the outlet housing; and
a pressure regulator having an threaded inlet that can be coupled to a water supply, the threaded inlet comprising an upstream
end, a downstream end, and an inlet wall extending between the upstream and downstream ends, the inlet wall having internal
threads extending over a majority of a length of the wall as measured parallel to the longitudinal axis of the outer case;

the pressure regulator fixedly mounted to the first opening of the outer case and positioned at least partially within the
outer case and configured to regulate fluid pressure within the irrigation sprinkler as water enters the outer case to maintain
a substantially constant pressure inside the outer case and the riser inlet, wherein the pressure regulator comprises a spring
at least partially surrounding at least a portion of the inlet wall and overlapping at least a portion of the internal threads
of the inlet wall in a direction parallel to the longitudinal axis of the outer case.