Fire extinguishers – Automatic valves
Patent
1983-01-05
1985-11-19
Kashnikow, Andres
Fire extinguishers
Automatic valves
169 90, A62C 3720
Patent
active
045536023
ABSTRACT:
An automatic on-off sprinkler head is disclosed for discharge of water for extinguishing a fire in the vicinity in which the delivery of water to and through the head is controlled by alternative temperature responsive elements, namely a snap-disc and a fusible alloy, which normally remains in an inactive position, the temperature responsive element actuating a seal plunger to retain water in a priming or control chamber, the priming or control chamber having therein a flexible tubular valve capable of being compressed to and retained in a closed position by the pressure in the priming or control chamber, the flexible tubular valve providing a boundary of the priming or control chamber, the flexible tubular valve providing a passageway connecting the inlet of the sprinkler head with the discharge orifice nozzle for straight through flow when the flexible tubular valve is in uncompressed or open condition, the priming or control chamber being in communication with the inlet for pressure variation accommodation, the flexible tubular valve being clamped at its upper and lower ends for retention in the head, the seal plunger venting the priming or control chamber upon actuation of the temperature responsive element, the seal plunger normally retaining the flexible tubular valve in closed position to prevent flow of water and retaining deposit buildup at the upper end of the flexible tubular valve, but opening for discharge of water and flushing of deposit buildup, the venting being discontinued and the valve being closed upon lowering of the ambient temperature, the sprinkler head acting to conserve water and to reduce water damage by avoiding unnecessary discharge of water.
REFERENCES:
patent: 2026916 (1936-01-01), Smith
patent: 2414127 (1947-01-01), Shaw
patent: 2786642 (1957-03-01), Comb
patent: 3757866 (1973-09-01), Mears et al.
patent: 3812914 (1974-05-01), Mears
patent: 3848676 (1974-11-01), Doherty, Jr.
patent: 3924687 (1975-12-01), Groos
patent: 4128128 (1978-12-01), Mears
patent: 4139062 (1979-02-01), Rago
patent: 4368782 (1983-01-01), Bray
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