Breathing mask and regulator for aircraft

摘要

The auxiliary breathing flow channel apparatus for an oxygen mask for pilots and crew of an airplane includes a flow control device with closed and open positions to regulate flow through an auxiliary channel. A pressure sensor such as an aneroid capsule automatically closes the auxiliary channel upon a decrease in cabin pressure. A handle also allows a user to manually move the flow regulating means to a closed position.

主权项

1. An auxiliary breathing flow channel apparatus for an oxygen mask for pilots and crew of an airplane, the oxygen mask having an oronasal face seal defining an oronasal cavity, and an oxygen supply regulator, the auxiliary breathing flow channel apparatus comprising:
an auxiliary ambient air flow channel defined in a flow channel member through a portion of the oxygen mask, said auxiliary ambient air flow channel being connected to ambient air and configured to deliver ambient air through said auxiliary ambient air flow channel to the oxygen mask; a flow regulator for regulating flow through the flow channel member, the flow regulator having a main housing and an aneroid housing assembly including a lower aneroid housing movable within the flow regulator main housing between at least one closed position in which flow through the auxiliary ambient air flow channel is blocked and an open position in which flow through the auxiliary ambient air flow channel is enabled, the flow regulator including an aneroid capsule that changes in length in response to changes in cabin pressure operative to move said lower aneroid housing in said flow regulator main housing between said at least one closed position and said open position; and a push/pull button for manually moving said lower aneroid housing in said flow regulator main housing to said at least one closed position, said push/pull button having a tubular lower portion and an upper plate connected to the tubular lower portion, said tubular lower portion being movably mounted between an upper aneroid housing and said lower aneroid housing.