Dry sprinkler system

Details Dry sprinkler system Dry sprinkler system

1988-07-05

1992-03-31

Focarino, Margaret A.

Fire extinguishers

Fluid systems

Distributing systems

169 20, A62C 3564, A62C 3568

Patent

active

050999257

ABSTRACT:
A dry sprinkler system includes a compressed gas pilot operated water valve between a water supply main and a dry sprinkler pipe, the valve being normally open and held closed upon activation of the pilot by water pressure.

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patent: 2558176 (1951-06-01), Gieseler
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patent: 3100017 (1963-08-01), Johnson
patent: 3208716 (1965-09-01), Rolfe
patent: 3883314 (1975-06-01), Landsberg
patent: 3887524 (1975-04-01), Glenn, Jr.
patent: 3913884 (1975-10-01), Rolfe
patent: 3958643 (1976-05-01), Landsberg
patent: 4172585 (1979-10-01), Rolfe
patent: 4286668 (1981-09-01), McCormick

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