Water activated inflation mechanism

Details Water activated inflation mechanism Water activated inflation mechanism

1982-09-30

1984-11-13

Skaggs, H. Grant

Dispensing

Gas or vapor dispensing

With cutter or punch

222 54, 441 98, B67B 724

Patent

active

044820810

ABSTRACT:
An inflation mechanism is provided for automatically inflating a life preserver or the like upon immersion in water. The mechanism includes a housing, a first piston slidably mounted within the housing, a second piston slidably mounted within the first piston, and a water-activated chemical positioned in a chamber between the two pistons. Upon immersion in water, the chemical reacts therewith creating a gaseous end product. The pistons are forced apart by the gas. One of them includes a piercing pin for puncturing the membrane of a CO.sub.2 cartridge. If the mechanism is not totally immersed in water, the piston including the piercing pin is restricted from moving through the membrane.

REFERENCES:
patent: 2349480 (1944-05-01), Walk
patent: 2513347 (1950-07-01), Myers
patent: 3246801 (1966-04-01), De Boer
patent: 3934292 (1976-01-01), Mulderrig

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