Protected liquid-sensitive actuator for displacement responsive

Details Protected liquid-sensitive actuator for displacement responsive Protected liquid-sensitive actuator for displacement responsive

1984-07-13

1986-04-15

Blix, Trygve M.

Buoys, rafts, and aquatic devices

Water rescue or life protecting apparatus

Personal flotation device

441 92, 441 97, 441100, H01H 2900

Patent

active

045824940

ABSTRACT:
A liquid-sensitive actuator for actuating a displacement responsive device, such as an inflator for a flotation device. The actuator comprises a sensing member within a housing which expands upon contact with a liquid entering the housing through an inlet. Expansion of the sensing member imparts displacement to the device and thereby causes its actuation. In the case of a flotation device, actuation may involve displacement of a trigger member to cause discharge of gas from a cartridge to deploy an inflatable cell. The sensing member may comprise a dried, compressed natural sponge member which expands rapidly and forcefully when immersed in water to actuate the device. A cover is provided for the housing which is movable between a latched, closed position substantially sealing the liquid inlet and an open position to permit entry of liquid into the housing. When the cover is in the closed position, the sensing member is physically immobilized to prevent premature activation of the actuator. The cover is maintained on the housing regardless of the position of the cover.

REFERENCES:
patent: 2369215 (1945-02-01), Crise
patent: 2627998 (1953-02-01), Musser
patent: 3127624 (1964-04-01), Kubit
patent: 3602661 (1971-08-01), Liedberg
patent: 3808385 (1974-04-01), Klinefelter

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