Title:
GAS REMOVING APPARATUS
Document Type and Number:
Japanese Patent JPS6014864
Kind Code:
A
Abstract:
A gas scavenger system is disclosed for use particularly with anesthetic administering equipment utilizing a demand valve for providing anesthetic gas to the patient. The gas scavenger system includes a collection manifold that collects the waste gases as they leave the normal exhaust ports of the demand valve. A flexible tubing means then carries those collected gases to a surge chamber prior to eventual discharge into a vacuum system. The surge chamber provides an interface between the vacuum system and the collection manifold and is connected to the vacuum system through a predetermined sized orifice which limits the flow to the vacuum system to a maximum known flow. The surge chamber normally allows continuous flow through the orifice to the vacuum system but is sized to accumulate an excess of flow from the collection manifold under abnormal conditions such as is occasioned when a patient coughs to allow time to remove the gases through the orifice and thus to prevent leakage to atmosphere. The surge chamber itself is directly connected to ambient through a known, fixed resistance of hydrophobic material such that an excess in pressure in the surge chamber above a maximum amount that determined by the known, fixed resistance is bled to atmosphere. Thus, in the event of an occlusion in the vacuum line, the patient is always assured a path for exhalation. Also, in the event the vacuum system draws gas at a faster flow rate than that of waste gases entering the surge chamber from the collection manifold, gas will be drawn from the ambient through the known, fixed resistance.
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Inventors:
RICHIYAADO HENIGU
Application Number:
JP12990684A
Publication Date:
January 25, 1985
Filing Date:
June 22, 1984
Export Citation:
Assignee:
AIRCO INC
International Classes:
A61M16/01; A61M16/00; (IPC1-7): A61M16/00
Domestic Patent References:
| JPS5735983A | 1982-02-26 |
Attorney, Agent or Firm:
Minoru Nakamura
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