Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1987-05-28
1988-08-09
Rivell, John
Fluid handling
Destructible or deformable element controlled
Destructible element
137 681, F16K 1740
Patent
active
047621400
ABSTRACT:
Disclosed is a plug valve for installation in a water supply line which will shut off flow through the line when a downstream emitting element, such as a sprinkler head, is destructively removed from the line. A fracture groove on the exterior of the valve body defines a structurally weakest point and is axially located on the body between an upstream valve seat and a downstream limit stop. The limit stop maintains the valve in an open position during normal operation. Should the downstream emitting element be destructively removed, the supply line will break at its weakest point. The limit stop, being located downstream of the weakest point, will also be removed allowing the valve to close in response to inlet water pressure only, preventing loss of water from the supply line.
REFERENCES:
patent: 733372 (1903-07-01), Colwell
patent: 1311774 (1919-07-01), Bitter
patent: 2804317 (1957-08-01), Prater
patent: 3995694 (1976-12-01), Freiburger
patent: 4077422 (1978-03-01), Brinkley
patent: 4562962 (1986-01-01), Hartman
Mon Donald D.
Rivell John
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