Patent ID: 8079531

Claim:
A sprinkler, comprising: a housing fitted with an inlet port connectable to a water supply line and extending into an inlet chamber; a hollow stem member with an inlet end thereof being in flow communication with said inlet chamber and an outlet end thereof being in flow communication with an irrigation head; and a diaphragm seal sealingly fixed at peripheral boundaries thereof to the housing and sealingly articulated to the stem member and supporting the stem member in an essentially upright position, said diaphragm being deformable between a first retracted position in which the irrigation head is retracted within the housing and a second operative position in which the irrigation head projects from and outside the housing, the stem member being radially supported to enable only sliding displacement in an axial direction from the inlet chamber towards the irrigation head without any tilt or rotation, wherein the diaphragm is fully contained within the housing in both the first and second positions.