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Breathing mask and its production process - Patent 4723542 (1063 words) |
 | Breathing mask according to claim 2 wherein the polyvinyl is a food-grade antiallergy polyvinyl. |
| Breathing mask according to claim 10 wherein the recesses are distributed in the shape of a fan. |
| Breathing mask according to claim 12 wherein the part of the mask that rest against the face is a heat-sealed flange of food-grade antiallergy polyvinyl. |
| Breathing apparatus and installation providing protection against hypoxia - Patent 6923183 (2477 words) |
| Breathing apparatus according to claim 3, wherein said connecting means further comprise valve means for preventing initial filling of said buffer plenum from said generator until an oxygen content of the gas delivered by the generator exceeds a predetermined threshold. |
| Breathing apparatus according to claim 3, wherein said generator is a common bank of OBOGS also for delivery of oxygen-enriched air to a manifold supplying passenger masks in the aircraft. |
| Breathing apparatus according to claim 3, wherein an electronic module is arranged to control a solenoid valve so as to put a manifold into communication with a check valve on receiving a signal indicating that the door of the box has been opened. |
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