Fluid handling – With indicator – register – recorder – alarm or inspection means – Plural
Patent
1978-01-12
1980-12-09
Schwadron, Martin P.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Plural
12820325, 137607, 1376361, 137637, 251205, A61M 1700, F16K 1900
Patent
active
042379253
ABSTRACT:
An anesthesia apparatus which comprises at least two flow meters, an oxygen gas supply means for supplying oxygen gas to one of said flow meters, a nitrous oxide gas supply means for supplying nitrous oxide gas to another one of said flow meters, at least two flow rate adjustment valves disposed between the one of said flow meters and said oxygen gas supply means and between said another one of said flow meters and said nitrous oxide gas supply means, respectively, each of said flow rate adjustment valve including a valve element having a predetermined shape to vary the rate of flow of each of said gases substantially in proportion to the amount of movement of said valve element, a flow control means connected to said flow rate adjustment valves for actuating said valves, and a flow rate adjustment means operatively connected to said flow control means and operative to set a selected angular position of said flow control means with respect to said flow rate adjustment valves for thereby determining the relative proportions of said gases, said flow control means being operative to move said flow rate adjustment valves while maintaining said selected angular position for thereby varying the total rate of flow of said gases substantially without varying the relative proportions thereof.
REFERENCES:
patent: 1793608 (1931-02-01), Gramberg
patent: 2040663 (1936-05-01), Mallet et al.
patent: 2171992 (1939-09-01), Rantine
patent: 3139262 (1964-06-01), Morris et al.
patent: 3739799 (1973-06-01), Bickford et al.
patent: 3875968 (1975-04-01), Olofsson et al.
patent: 3905363 (1975-09-01), Dudley
Citizen Watch Co. Ltd.
Gerard Richard
Schwadron Martin P.
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