Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1984-02-23
1986-03-18
Recla, Henry J.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820524, 12820516, 12820523, 12820325, 137606, 137896, 138 31, 138 46, A61M 1600
Patent
active
045761590
ABSTRACT:
Gas mixing and flow smoothing apparatus for use in for example an anaesthesia system comprises a mixing chamber (8) which receives the flow of two or more gases via control valves (6,7). The mixing chamber (8) is adapted to absorb fluctuations in the pressure of the gases therein through the provision of for example a spring-loaded piston (not shown) which forms one wall of the chamber, and the pressure at the outlet (30) from the chamber (8) is maintained at a substantially constant pressure by means of a valve (9). If desired, further attenuation of the gas flow may be achieved through the provision of a second series arrangement of surge damper (11) and back pressure valve (10) located downstream from the valve (9).
REFERENCES:
patent: 2904076 (1959-09-01), Engel et al.
patent: 3487855 (1970-01-01), Lantenberger, Jr.
patent: 4026283 (1977-05-01), Banjavich et al.
patent: 4137912 (1979-02-01), O'Neill
Hahn Clive E. W.
Lindsay-Scott David J.
Palayiwa Eileen
Sugg Basil R.
Tyrrell Paul J.
Penlon Limited
Recla Henry J.
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