Abstract: A Regulator-Oxygen (ROX) Unit for regulating oxygen flow in an emergency oxygen distribution system in passenger aircraft initially allows unregulated surge of oxygen to purge ambient air from the system. After sufficient pressure is achieved in the system, the ROX unit regulates oxygen flow mechanically with a diaphragm engaging a regulator valve that responds to the pressure of the oxygen under the diaphragm to reduce the flow of oxygen through the ROX unit, which accounts for altitude changes by communicating the inlet pressure to the chamber above the diaphragm. A bleed exit allows the oxygen to escape to the ambient air. One or more aneroid valves serve to adjust the amount of oxygen allowed to exit through the bleed exit, allowing less oxygen to escape with increasing altitude. An increase in pressure above the diaphragm allows more oxygen to flow through the regulator valve.

Abstract: The present invention is a centralized flow control unit (CFCU) for regulating oxygen flow in a multiple user emergency oxygen distribution system in passenger aircraft. Upon activation, the CFCU initially allows unregulated flow of oxygen to surge into the distribution system to thereby purge the ambient air out of the system. After a sufficient pressure is achieved in the distribution system, the CFCU regulates the flow mechanically with a diaphragm engaging a regulator valve. The pressure of the oxygen under the diaphragm causes the regulator valve to reduce the flow of the oxygen through the CFCU. The CFCU accounts for changes in altitude by including a bleed passageway in the diaphragm. A small amount of the oxygen under the diaphragm bleeds to the chamber above the diaphragm then a bleed exit allows the oxygen to escape to the ambient air.

Abstract: The present invention is a Regulator-Oxygen (ROX) Unit for regulating oxygen flow in a multiple user emergency oxygen distribution system in passenger aircraft. Upon activation, the ROX unit initially allows unregulated flow of oxygen to surge into the distribution system to thereby purge the ambient air out of the system. After a sufficient pressure is achieved in the distribution system, the ROX unit regulates the flow mechanically with a diaphragm engaging a regulator valve. The pressure of the oxygen under the diaphragm causes the regulator valve to reduce the flow of the oxygen through the ROX unit. The ROX unit accounts for changes in altitude by communicating the inlet pressure to the chamber above the diaphragm. A bleed exit allows the oxygen to escape to the ambient air. One or more aneroid valves in fluid communication with the bleed exit adjust the amount of oxygen allowed to exit through the bleed exit such that less oxygen is allowed to escape for an increase in altitude.

Abstract: The present invention is a centralized flow control unit (CFCU) for regulating oxygen flow in a multiple user emergency oxygen distribution system in passenger aircraft. Upon activation, the CFCU initially allows unregulated flow of oxygen to surge into the distribution system to thereby purge the ambient air out of the system. After a sufficient pressure is achieved in the distribution system, the CFCU regulates the flow mechanically with a diaphragm engaging a regulator valve. The pressure of the oxygen under the diaphragm causes the regulator valve to reduce the flow of the oxygen through the CFCU. The CFCU accounts for changes in altitude by including a bleed passageway in the diaphragm. A small amount of the oxygen under the diaphragm bleeds to the chamber above the diaphragm then a bleed exit allows the oxygen to escape to the ambient air.