Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1976-02-11
1977-04-12
Miles, Tim R.
Gas and liquid contact apparatus
Fluid distribution
Valved
128187, 128211, 261DIG65, 261 39R, A61M 1500
Patent
active
040175669
ABSTRACT:
A vaporizer for anaesthetics or narcotics comprises a housing having an interior liquid anaesthetic reservoir and an evaporation chamber above the reservoir. An inlet into the housing divides so that there is a vaporizing flow passage over and through a coiled vaporizing tube wick in an annular passage down to the liquid anaesthetic, then upwardly in a central passage and past a regulatable annular passage to a discharge passage. The inlet also includes a bypass flow through a passage which joins an annular space above the vaporizing chamber portion above the anaesthetic liquid and back to the discharge passage. A control device is located in the second or bypass passage and comprises an annular trough-shape body having a closed bottom wall which is of a material of a high coefficient of thermal expansion. A hollow cylinder is positioned in the trough-shape annular body and forms a close fit therewith and has a low coefficient of thermal expansion relative to the trough-shape body. The hollow cylinder includes a top flange portion which is spaced below an annular ring member which is suspended from the housing by sealing means which includes an anchor. The ring member is made of a material of low coefficient of thermal expansion relative to the housing and the hollow cylinder and the trough-shape annular body. The annular ring member is spaced above the flange portion of the hollow cylinder and defines an annular gap therebetween.
REFERENCES:
patent: 3438372 (1969-04-01), Sugg et al.
patent: 3534732 (1970-10-01), Bickford
patent: 3651805 (1972-03-01), Breiling
patent: 3671024 (1972-06-01), Breiling
patent: 3841560 (1973-07-01), Sielaff
Clements Gregory N.
Dragerwerk Aktiengesellschaft
Miles Tim R.
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