Oxygen breathing controls
AssigneeAmerican Safety Flight Systems, Inc.
InventorJoseph S. Danon
Life of this patent
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Abstract
The oxygen breathing control of the present invention for supplying oxygen to a user employs a first stage regulation module, a valving module which couples with the first stage regulation module, a servo regulator module and an aneroid module. The servo regulator module with oxygen conservation function during exhalation controls oxygen flow between zero to approximately 34,000 feet, and the aneroid module takes over the control of breathing pressure schedule between 34,000 to 45,000 feet. A flow restrictor screw module is employed in the passage between a control chamber and an inlet chamber of the valving module for regulating the flow between the two chambers.
Claims10
An oxygen breathing control for supplying an oxygen containing fluid comprising:
- a ) a first inlet regulator having:
- an inlet housing having an inlet opening;
- an inlet valve disposed inside the inlet housing near the inlet opening;
- a piston disposed inside the inlet housing downstream of the inlet valve and having a piston chamber;
- and
- means for opening the inlet valve during inhalation of a user to allow the fluid through to the piston chamber;
- and
- b) a second inlet regulator coupled with the first inlet regulator and disposed downstream thereof, having:
- an inlet chamber;
- a control chamber disposed downstream of the inlet chamber;
- a valve liner separating the inlet chamber and the control chamber, the valve liner being flexible;
- and
- means for creating a pressure differential across the inlet chamber and the control chamber and for flexing the valve liner to permit fluid flow upon inhalation.
An oxygen breathing control for supplying oxygen having:
- a) an inlet regulator means for regulating the flow of the oxygen having a piston means for accelerating a rate of the oxygen supply and an inlet diaphragm disposed downstream from the piston, the inlet diaphragm responsive to a pressure differential across the diaphragm;
- b) an outlet chamber;
- and
- c) a servo regulator module including means for further regulating the pressure of the flow of the oxygen to the outlet chamber having:
- an atmospheric chamber;
- a regulator adjustment screw partially disposed in the atmospheric chamber;
- and
- a regulator diaphragm coupled to the regulator adjustment screw and disposed in the atmospheric chamber, the regulator diaphragm having a pilot regulator valve, wherein the pilot regulator valve opens when the regulator adjustment screw is unscrewed, and the pilot valve closes when the regulator adjustment screw is tightened.
Dependencies are inferred from the claim text.