NASA NTRS · 19740000075
Programmed-pressure air supply for positive-pressure breathing system
Abstract
Motor-driven cam varies height of mercury column connected to loading diaphragm of pressure-regulating valve. Air supplied to open-loop, positive pressure breathing system is controlled so repetitive pressure--time profiles can be obtained during every insufflation--exhaust cycle.
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Troutman, S. J., Jr., Annis, J. F.. 1974-06-01. Programmed-pressure air supply for positive-pressure breathing system. https://ntrs.nasa.gov/citations/19740000075
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