US3756577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaporizer ventilating line
Assignee: Individual
•
Filing: 1972-04-17
•
Granted: 1973-09-04
•
Expires: 1992-04-17
Abstract
Abstract In an anesthesia vaporizer, the ventilating line has its outlet orifice positioned lower than the vaporizer control valve and the branch point between the air inlet into the vaporizer and the bypass line to the mixing chamber. This prevents unduly enriched gas from reaching a patient during the beginning use of the vaporizer. Preferably the inlet to the ventilating line is within the container and below the control valve.
Inventors
- 👤 H Breiling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:14
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/14; A61M16/18; Y; Y10; Y10S; Y10S261/00; Y10S261/65
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
A vaporizer for liquid anesthesia comprising a container having a top portion with a mixing chamber and a bottom portion in communication with said top portion adapted to contain the liquid anesthesia up to a predetermined level and leaving a space thereabove in said bottom portion for vaporization of said liquid anesthesia, an inlet connected into said mixing chamber, a discharge for the mixing chamber spaced from said inlet, a bypass for said inlet connected from said inlet into said bottom portion for flow over the liquid anesthesia, a valve seat defined at the connection of said top and bottom portions, a valve in said mixing chamber movable toward and away from said valve seat for opening and closing the connection between said top and bottom portion, and a ventilating duct having one end connecting with atmosphere and an opposite end terminating in a vent opening which is closely spaced below said valve and which vents said bottom portion substantially to the level of said valve.
Claim 2
Dependent Claim
166 words
A vaporizer for liquid anesthesia comprising a container having a top portion with a mixing chamber and a bottom portion in communication with said top portion adapted to contain the liquid anesthesia up to a predetermined level and leaving a space thereabove in said bottom portion for vaporization of said liquid anesthesia, an inlet connected into said mixing chamber, a discharge for the mixing chamber spaced from said inlet, a bypass for said inlet connected from said inlet into said bottom portion for flow over the liquid anesthesia, a valve seat defined at the connection of said top and bottom portions, a valve in said mixing chamber movable toward and away from said valve seat for opening and closing the connection between said top and bottom portion, and a ventilating duct having one end connecting with atmosphere and an opposite end terminating in a vent opening which is closely spaced below said valve and which vents said bottom portion substantially to the level of said valve.
Claim 3
Dependent Claim
43 words
A vaporizer, according to claim 1, wherein said bypass includes means defining an annular flow passage above the liquid anesthesia level, and a wick disposed in the open bottom portion extending below the liquid anesthesia level and upwardly through said annular flow path.
Claim 4
Dependent Claim
55 words
A vaporizer according to claim 1, including a temperature regulating water vessel located within said bottom portion above the liquid level and having an inner wall defining a central upward flow passage directly below said valve, said ventilating duct extending through said flow passage and terminating in an upwardly extending portion immediately below said valve.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |