Patent ID: 8695598
Filing Date: 2014-04-15
Classification: A62B,B64D

Abstract:
1. An oxygen breathing device for cockpit crew member of an aircraft, comprising: a pressurized oxygen source for storing pressurized oxygen, an oxygen mask adapted to fit to a nose and mouth of a person to be supplied with oxygen from the pressurized oxygen source, an oxygen supply line connecting the pressurized oxygen source with the oxygen mask, a pressure regulator/safety valve coupled in the oxygen supply line to selectively open or shut off oxygen flow from the pressurized oxygen source to the oxygen mask and/or to control pressure of said oxygen supplied to the oxygen mask, a pneumatic seal comprising a membrane that pneumatically seals the pressurized oxygen source in a non-use condition, an opening device adapted to open or remove the pneumatic seal by puncturing or removing the membrane in case of an emergency situation requiring oxygen supply to the person, a change over valve adapted to selectively supply oxygen from the pressurized oxygen source or pressurized air from a pressurized air source to the oxygen mask; and a control unit adapted to receive a pre-flight check signal by a user of the oxygen breathing device and to activate the change over valve upon receipt of said pre-flight check signal to switch into a condition wherein pressurized air is provided to the oxygen mask.