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A pop-up sprinkler which includes a housing, a riser in the housing movable between an extended position in which the riser extends from the housing and a retracted position in which the riser is retracted from the extended position and a pressure regulator in the riser. The pressure regulator can b

A pop-up sprinkler which includes a housing, a riser in the housing movable between an extended position in which the riser extends from the housing and a retracted position in which the riser is retracted from the extended position and a pressure regulator in the riser. The pressure regulator can be constructed as a cartridge or separate unit and installed in the riser. The riser has an aperture adjacent the pressure regulator and the aperture is between first and second axially spaced seals in the extended position so as to reduce the likelihood of clogging of the aperture. A dirt tolerant wiper seal is mounted on a movable valve tube of the pressure regulator and a pressure activated seal is provided between a valve seat of the pressure regulator and the valve tube.

대표청구항 ▼

[ We claim:] [1.] In a pop-up sprinkler which includes a housing, a riser in the housing movable between an extended position in which the riser extends from the housing and a retracted position in which the riser is retracted from the extended position, first and second axially spaced seals carried

[ We claim:] [1.] In a pop-up sprinkler which includes a housing, a riser in the housing movable between an extended position in which the riser extends from the housing and a retracted position in which the riser is retracted from the extended position, first and second axially spaced seals carried by said housing and cooperable with the riser, said second seal allowing the passage of air, a pressure regulator within said riser and an aperture in the riser adjacent the pressure regulator for providing a vent for the pressure regulator, the improvement comprising:said aperture being located on said riser so as to be between the first and second seals in said extended position whereby the first and second seals reduce the likelihood of clogging of the aperture.