Underground sprinkler with pop-up head

Details Underground sprinkler with pop-up head Underground sprinkler with pop-up head

2006-08-29

2006-08-29

Scherbel, David A. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With fixed support for or ground installed supply means

Embedded or buried sprinkler

C239S203000, C239S204000, C239S205000, C239S230000, C239S104000

Reexamination Certificate

active

07097116

ABSTRACT:
An underground sprinkler with a pop-up head and a corresponding underground casing has two differentiated cylindrical parts, closed by a corresponding cover fixed to the pop-up sprinkler head, which, being a part coupled to the piston, pops-up due to the effect of the water pressure pushing the piston in a portion calculated for this purpose and which is so maintained for as long as the pressure lasts, to be recovered by the action of a permanent draw-spring when the pressure stops.

REFERENCES:
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patent: 3625429 (1971-12-01), Turrell
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patent: 4565323 (1986-01-01), Berkan
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patent: 6478237 (2002-11-01), Kearby et al.
patent: 6732950 (2004-05-01), Ingham et al.
patent: 6736332 (2004-05-01), Sesser et al.
patent: 6814304 (2004-11-01), Onofrio
patent: 6840460 (2005-01-01), Clark

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