Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1999-04-16
2000-11-07
Joyce, Harold
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820226, A62B 708
Patent
active
061421510
ABSTRACT:
A dual-bed ventilation air regeneration system is adapted for use in conjunction with a ventilation or respiration air loop of an astronaut space suit wherein the ventilation loop includes inlet and outlet manifolds. A pair of chemical beds, having inlet and outlet manifolds, are provided for alternatively adsorbing carbon dioxide and water vapor deposits from the ventilation or respiration air, and for desorbing such deposits to the hard vacuum of space through spool valve housing vacuum ports. A single spool valve controls the fluidic connections between the ventilation air inlet and outlet manifolds, the chemical bed inlet and outlet manifolds, and the exhaust or vacuum ports. The spool valve also permits equalization of the chemical bed pressures and volumes during transition between chemical bed changeovers between the adsorbing and desorbing phases so as to save one-half the volume of air as compared to that which would otherwise be lost to space if such pressure equalization was not achieved. In addition, air which is utilzied to actuate the spool valve in its reciprocating movements is used to replenish air, within the ventilation loop, which was lost to vacuum during the previous desorbing cycle.
REFERENCES:
patent: 4065272 (1977-12-01), Armond
patent: 4239039 (1980-12-01), Thompson
patent: 5042471 (1991-08-01), Drews et al.
Joyce Harold
United Technologies Corporation
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