Sprinkler shut-off valve and indicator

Details Sprinkler shut-off valve and indicator Sprinkler shut-off valve and indicator

1994-10-06

1996-06-11

Merritt, Karen B.

Fluid sprinkling, spraying, and diffusing

With signals, indicators, recorders, meters or changeable...

239200, 239201, 239569, 137556, 116277, 116283, F16K 3700, F17D 300

Patent

active

055248241

ABSTRACT:
A shut-off valve, for use with a sprinkler head affixed to a riser pipe, including a valve seat affixed within the riser pipe upstream from the sprinkler head, the valve seat having an opening and impeding flow through said riser except through the opening. A movable valve element is located within the riser pipe upstream from the valve seat, the valve element being movable between an open position, in which it is spaced apart from the valve seat, and a closed position, in which it engages the valve seat to close the opening and impede fluid from flowing through the riser pipe. A spring biases the valve element toward the valve seat, and a perforated tube extends from the valve element through the opening in the valve seat and contacts the sprinkler head to maintain the valve element in its open position. Whenever the sprinkler head becomes dislodged from the riser pipe, the spring moves the valve element downstream into its closed position, and forces the perforated tube to extend out from an outlet of the riser pipe. Optimally, the perforated tube is brightly colored with a flag connected thereto so as to provide the most effective alerting means.

REFERENCES:
patent: 1432386 (1922-10-01), Curney
patent: 2654338 (1953-10-01), Deal
patent: 2768027 (1956-10-01), Nelson
patent: 4141310 (1979-02-01), Rich, Jr.
patent: 4562962 (1986-01-01), Hartman
patent: 4736889 (1988-04-01), Stephenson
patent: 4825897 (1989-05-01), Shade
patent: 4842198 (1989-06-01), Chang
patent: 4848661 (1989-07-01), Palmer et al.
patent: 5174500 (1992-12-01), Yianilos
patent: 5335857 (1994-08-01), Hagon
patent: 5373989 (1994-12-01), Hattori

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