NASA NTRS · 19650000366
Respiratory transfer value has fail-safe feature
Abstract
Quick-acting, remote controlled valve connects either one of two oxygen or air supplies to a breathing tube. The valve, which is fall-safe, incorporates a cammed piston arrangement that is driven by a remote controlled reversible rotary solenoid or reversible electric motor.
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Puccinelli, A. A., Smith, J. R., Jr.. 1965-12-01. Respiratory transfer value has fail-safe feature. https://ntrs.nasa.gov/citations/19650000366
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