Patent ID: 8863743

Claim:
In an emergency oxygen system for aircraft, the improvement comprising: a hermetically sealed oxygen cylinder of stainless steel with a welded metal diaphragm of a predetermined rupturable characteristic for maintaining the storage of oxygen at a pressure in excess of 1800 PSI; a hollow capillary tube sealed hermetically at one end to the oxygen cylinder, to provide a passageway for charging oxygen at a pressure in excess of 1800 PSI, into the oxygen cylinder and having a distal length of capillary tube of sufficient size and internal diameter to enable one or more multiple crimps of the capillary tube to provide a hermetic seal while extending outwardly from an exterior of the oxygen cylinder by a distance sufficient to safely have an opposite end of the capillary tube sealed hermetically by an application of heat to close the opposite end with a brazed or welded material, wherein the oxygen cylinder provides an exterior annular groove adjacent the one end of the capillary tube sealed to the oxygen cylinder, of a size to store the capillary tube within the annular grove; and a protective sleeve is mounted on the oxygen cylinder to surround and enclose the annular groove to protect the sealed capillary tube when the oxygen cylinder is storing oxygen.