Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1983-04-27
1985-03-12
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
137494, 137DIG9, A62B 704
Patent
active
045038520
ABSTRACT:
This scuba regulator second stage includes the following improvements:
(a) a diaphragm assembly using a pair of generally conical flexible diaphragms facing each other and clamped together about a portion of their periphery, the unclamped peripheral sections flexibly spreading apart to function as an exhaust valve;
(b) a "detune button" which prevents inadvertent turn-on of the breathable gas supply valve during unattended use of the regulator, and which is automatically disengaged when the user begins to breathe through the regulator;
(c) a case configuration in which the breathable gas inlet tube is situated very close to the regulator mouthpiece so as to minimize the torque loading on the teeth of the user as the user's head is turned;
(d) a unitary valve configuration in which the entire breathable gas flow valve assembly is removable from the regulator case as an integral unit, without the use of tools;
(e) a valve poppet configuration which prevents tilting of the poppet when the breathable gas flow control valve is opened;
(f) resilient flap and seal members for preventing the entry of contaminants into the valve and diaphragm linkage housings; and
(g) in a pneumatic amplification flow control valve, an improved pilot control pin and bleed orifice assembly having a balanced pressure control chamber.
REFERENCES:
patent: 3149631 (1964-09-01), Svenson
patent: 4334532 (1982-06-01), Jackson
patent: 4361145 (1982-11-01), Ekstrom et al.
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