Fluid sprinkling – spraying – and diffusing – With fixed support for or ground installed supply means – Embedded or buried sprinkler
Patent
1982-08-06
1984-10-30
Love, John J.
Fluid sprinkling, spraying, and diffusing
With fixed support for or ground installed supply means
Embedded or buried sprinkler
B05B 300
Patent
active
044796110
ABSTRACT:
A pop-up sprinkler is provided with a control valve for sealing a sprinkler housing against water inflow to prevent leakage or drainage therethrough unless the pressure in a water supply line reaches or exceeds a predetermined level sufficient to move a spring-biased pop-up stem rapidly to an elevated spraying position. The control valve comprises a relatively small valve plug at the bottom of the pop-up stem and encircled by a seal ring for sealing engagement with a valve seat when water pressure is low to close a water inlet at the bottom of the sprinkler housing. In a preferred form wherein the housing is formed by a molding or casting process, the valve seat is defined by the inner diameter surface of an annular flange upstanding from a bottom wall of the housing and having a substantially uniform thickness for solidification with little or no valve seat heat deformation or distortion. When the water pressure increases to the predetermined level, the pressure displaces the valve plug from the valve seat and thereupon acts against the comparatively larger cross-sectional area of the pop-up stem resulting in a comparatively larger force for moving the stem rapidly to the elevated spraying position.
REFERENCES:
patent: 3033467 (1959-01-01), Hofer
patent: 3088677 (1961-07-01), Coffey
patent: 3637134 (1972-01-01), Felix
patent: 3713584 (1973-01-01), Hunter
patent: 4064906 (1974-08-01), Berg
patent: 4078726 (1978-03-01), Walto
patent: 4351477 (1982-09-01), Choi
Love John J.
Rain Bird Consumer Products Mfg. Corp.
Weldon Kevin Patrick
LandOfFree
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