First and second stage regulator system for breathing gas
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United States of America Patent
Stats
-
Feb 12, 1985
Grant Date -
N/A
app pub date -
Sep 28, 1982
filing date -
Sep 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A first and second stage breathing gas regulator having a first stage redundant piston assembly with a first piston encompassing a second piston. In the eventuality the first piston fails, the second piston provides regulated gas. A safety alarm is provided when a pre-established pressure drop occurs, signalling a decrease in breathing gas by opening to provide gas to drive an audio alarm. The second stage regulator has a balanced second stage that operates with a valve lever in operative relationship to a diaphragm. A hand wheel and cammed valve permit the bypass of breathing gas around the valve of the second stage regulator when required. The outlet of the second stage regulator is provided with a trap door cover to avoid dirt and debris being introduced to the second stage regulator when a hose is not connected thereto.
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Family
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