Pressurized extinguishant release device with rolling diaphragm

Details Pressurized extinguishant release device with rolling diaphragm Pressurized extinguishant release device with rolling diaphragm

1993-09-09

1995-10-17

Pike, Andrew C.

Fire extinguishers

Special applications

Condition responsive control

169 20, 169 60, 169 62, A62C 3746

Patent

active

054582024

ABSTRACT:
A pressurized extinguishant release device with a rolling diaphragm includes a closed elongated sensor tube filled for example with 50% water and 50% ethylene glycol which terminates in an enclosure sealed by a circular head portion of the rolling diaphragm. On the other side of the head portion is a piston connected to a penetrator retained against the diaphragm by a shear pin. The penetrator is positioned above a brittle membrane which encloses a pressurized extinguishant. Heating of the liquid filled sensor tube to a certain temperature will cause a vapor pressure to push against the diaphragm head to cause the shear pin to fail propelling the penetrator into the membrane and thus allow the extinguishant to flow.

REFERENCES:
patent: 1831193 (1931-11-01), Quitschalle
patent: 3464497 (1969-09-01), Globerman et al.
patent: 4282931 (1981-08-01), Golben

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