Water line safety valve

Details Water line safety valve Water line safety valve

2005-07-14

2008-01-15

Ganey, Steven J. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Line fluid operated

C239S570000, C239S203000, C239S204000, C239S533150, C137S068140, C137S071000, C137S517000

Reexamination Certificate

active

07318556

ABSTRACT:
A safety valve for a lawn sprinkler system having at least one subterranean flow line and at least one head for spraying irrigation water. The valve includes a tubular member connected between the flow line and the head. The tubular member has an axial passage therethrough for the flow of water from the flow line to the head. A seat is located within the passage. A ball is located in the passage upstream of the seat. The ball is axially movable from an open position upstream of the seat to a closed position in engagement with the seat if the water flowing through passage reaches a selected flow rate. A coiled spring in the passage is in engagement with the ball for urging the ball toward the open position.

REFERENCES:
patent: 4716937 (1988-01-01), Hendrickson
patent: 4762140 (1988-08-01), Davis
patent: 4848661 (1989-07-01), Palmer et al.
patent: 4867603 (1989-09-01), Chang
patent: 5335857 (1994-08-01), Hagon
patent: 5465752 (1995-11-01), Higgins
patent: 5758682 (1998-06-01), Cain
patent: 5857487 (1999-01-01), Carson et al.
patent: 6178982 (2001-01-01), Longstreth
patent: 6263911 (2001-07-01), Brown et al.
patent: 6367501 (2002-04-01), Svehaug

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