Patent ID: 11883694
Assignee: B/E AEROSPACE SYSTEMS GMBH
Field: Other consumer goods (Other fields)
Classification: CPC A  B | IPC A

Claim 0:
1. A breathing system, comprising:
at least one pressurized oxygen source;
a breathing mask worn by a user and configured to cover a nose and a mouth of the user, the breathing mask coupled to the pressurized oxygen source by at least one supply line;
a dilution valve coupled to the supply line, the dilution valve configured to provide a supply of ambient air to the breathing mask when open;
a demand valve coupled to the at least one oxygen source via the supply line;
and
a breathing regulator coupled to the at least one supply line and to the at least one oxygen source, the breathing regulator associated with a control volume (CV) pressure within the breathing regulator, and comprising at least one main valve, the breathing regulator configured to:
1) receive at least one pressure signal from the breathing mask, the pressure signal corresponding to a) a start of an inhalation cycle, b) an initial demand phase of the inhalation cycle, and c) an opening of the demand valve;
2) provide a pure oxygen supply from the at least one oxygen source to the breathing mask via the open demand valve throughout the initial demand phase;
3) when the CV pressure deceeds a lower pressure threshold, cutting off the pure oxygen supply by closing the main valve;
4) when the main valve closes, provide the ambient air supply to the breathing mask via the dilution valve, when the inhalation cycle has ended, restoring the CV pressure within the breathing regulator;
and
5) when the CV pressure exceeds an upper pressure threshold, preparing for a subsequent inhalation by reopening the main valve.