Pop-up sprinkler with pressure regulator
First 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.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
67 Citations
26 Claims
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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. - View Dependent Claims (2, 3, 4)
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5. A pop-up sprinkler comprising:
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a housing; a riser in the housing moveable between an extended position in which the riser extends from the housing and retracted position in which the riser is retracted from the extended position; a pressure regulator in said riser, said pressure regulator including a valve seat mounted within the riser and a valve tube moveable within the riser and cooperable with the valve seat to provide pressure regulation; cooperating shoulders for preventing separation of the valve tube and valve seat; and said valve tube being coupled to the valve seat and forming a structure which can be installed as a unit in the riser. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A pop-up sprinkler comprising:
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a housing; a riser in the housing moveable 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; a pressure regulator in said riser, said pressure regulator including a valve seat mounted within the riser and a valve tube moveable within the riser and cooperable with the valve seat to provide pressure regulation; first and second axially spaced seals carried by said housing and cooperable with the riser, an aperture in the riser located 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 and said second seal allows the passage of air whereby the aperture can serve as the vent for the pressure regulator; and said valve tube being coupled to the valve seat and forming a structure which can be installed as a unit in the riser. - View Dependent Claims (14, 15, 16)
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17. 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, and a pressure regulator within the riser and wherein the pressure regulator includes a valve seat mounted within the riser and a valve tube having an upper end and wherein the valve tube is movable within the riser and cooperable with the valve seat to provide pressure regulation, the improvement comprising;
a wiper seal mounted on the valve tube and having an annular lip engageable with the riser above the upper end of the valve tube. - View Dependent Claims (18, 19, 20, 21)
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22. 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, and a pressure regulator within the riser and wherein the pressure regulator includes a valve seat mounted within the riser and a valve tube having upper and lower ends and wherein the valve tube is movable within the riser and cooperable with the valve seat to provide pressure regulation, the improvement comprising;
a wiper seal disposed between the riser and the valve tube. - View Dependent Claims (23, 24, 25)
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26. A method of making a pop-up sprinkler, comprising:
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assembling a pressure regulator; mounting the pressure regulator in a riser subsequent to said step of assembly; assembling the riser into a housing so as to provide a pop-up sprinkler; and during the assembling step, capturing a spring between a shoulder in the valve tube and the spring support with the spring urging the valve tube and valve seat apart.
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Specification