Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1995-08-07
1998-11-24
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820426, 12820418, 12820712, A62B 902, A62B 704, F16K 3126
Patent
active
058394362
ABSTRACT:
A demand valve resuscitator having a reduced manual flow control. The resuscitator connects between a source of pressurized gas and a breathing mask. A patient may draw a flow of gas on demand through the resuscitator by inhaling. A pressure-responsive diaphragm within a pressure chamber, actuated on demand or manually, acts on a tilt valve in a gas intake port. Alternatively, an attendant may supply a reduced flow of gas to a patient by depressing a manual control button, which tilts the intake valve. The manual control of the gas flow is overridden by excess pressure within the pressure chamber of the resuscitator and the button must be released to reassert manual control. A baffle plate in the pressure chamber provides a venturi assist to reduce pressure adjacent the diaphragm to enable the patient to obtain maximum gas flow on demand with slight inhale suction. An anti-suffocation valve allows the patient to breath ambient air in the absence of a predetermined gas inlet pressure. The anti-suffocation valve is disposed in an intake assembly having an inlet fitting capable of swiveling without affecting the operation of the tilt valve.
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Fangrow, Jr. Thomas F.
Rulifson Donald G.
Asher Kimberly L.
Life Support Products, Inc.
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