Abstract: The compression molded aircraft personal service unit and integrated oxygen dispensing system module housings are formed by compression molding of a sheet molding material. The integrated oxygen dispensing system module can be mounted separately in the aircraft, or can be contained in the personal service unit, and includes an oxygen dispensing system module container housing having a multiple release main door, an oxygen generator removably disposed in the oxygen dispensing system module container housing, and one or more oxygen masks. In one embodiment, an external test lever is mounted on the main door, and in an alternative embodiment an internal test mechanism is provided that is operated by a test tool insertable through an aperture in the main door. An improved latch testing system and related capability is also provided.

Abstract: The compression molded aircraft personal service unit and integrated oxygen module housings are formed by compression molding of a sheet or bulk molding material. The integrated oxygen module can be mounted separately in the aircraft, or can be contained in the personal service unit, and includes a container housing having a multiple release main door, an oxygen generation cartridge removably disposed in the container housing, and an inner mask packing door between the main door and the oxygen masks for aiding in the packing of the oxygen masks in the container. In one embodiment, an external test lever is mounted on the main door, and in an alternative embodiment an auxiliary test deployment tool is insertable through an aperture in the main door for retaining the main door in a partially opened test position.

Abstract: A respirator especially constructed for flight crews has a harness strap which can be inflated to a somewhat rigid, self-sustaining orientation to permit one-handed placement of the respirator over the wearer's head. Once the respirator is in place, release of a lever for inflating the strap deflates the latter to a orientation sufficient to cause the resilient strap to tightly press a peripheral seal of the respirator mask against nose and mouth areas of the user's face. A comfort adjustment to relieve strap tension permits selective reinflation of the strap to a somewhat smaller value than necessary for initial donning of the harness, and the limited reinflation pressure is sufficient for causing the mask to seal against the face during pressure demand breathing. In instances where pressurized breathing is needed, however, pressure within the strap is automatically released so that the strap presents sufficient bias to hold the mask against the face without oxygen leakage therepast.

Abstract: A respirator especially constructed for flight crews has a harness strap which can be inflated to a somewhat rigid, self-sustaining orientation to permit one-handed placement of the respirator over the wearer's head. Once the respirator is in place, release of a lever for inflating the strap deflates the latter to an orientation sufficient to cause the resilient strap to tightly press a peripheral seal of the respirator mask against nose and mouth areas of the user's face. A comfort adjustment to relieve strap tension permits selective reinflation of the strap to a somewhat smaller value than necessary for initial donning of the harness, and the limited reinflation pressure is sufficient for causing the mask to seal against the face during pressure demand breathing. In instances where pressurized breathing is needed, however, pressure within the strap is automatically released so that the strap presents sufficient bias to hold the mask against the face without oxygen leakage therepast.