Selector valve for an aircraft on board oxygen generation...

Details Selector valve for an aircraft on board oxygen generation... Selector valve for an aircraft on board oxygen generation...

A - Human Necessities

61

M

137/1.54

A61M 15/00 (2006.01) A62B 7/14 (2006.01) A62B 9/02 (2006.01)

Patent

CA 1216491

ABSTRACT OF THE DISCLOSURE A selector valve for an aircraft breathing system wherein oxygen enriched gas is provided by two sources, the primary source being fractionalized air and the secondary, backup, source being bottled oxygen is comprised of a control valve with three operating modes and a shuttle valve. In the first operating mode gas is provided from the primary source, in the second operating mode gas is provided from the primary source within certain operating parameters and outside these parameters gas from the secondary source is provided. In the third operating mode, gas from the secondary source is provided. The shuttle valve responds to the secondary source gas pressure and directs gas from either source to the pilot based on preset conditions

450107

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