Patent US4573462A successfully refreshed from Google Patents.
US4573462A
Expired / Lapsed
US
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Respiratory system
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1984-04-04
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Granted: 1986-03-04
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Expires: 2004-04-04
Abstract
Abstract A respiratory system comprises a breathing gas source which is connected to a feed part such as a tracheal tube connection to a closed circuit respiratory gas ventilation circuit. The gas ventilation circuit has a pressure relief connection therein. The gas feed part is connected to the breathing gas source and to the breathing gas supply through a control which controls the feed of a pulse of gas through at least one gas nozzle which is mounted to extend into the feed part at a location to form a suction area in the feed part which induces the flow of the ventilating gas through the feed part and the closed circuit respiratory gas ventilation circuit.
Inventors
- 👤 Marcel Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0096; A61M16/0003; A61M16/0009; A61M16/0012; A61M16/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
213 words
A respiratory gas system, comprising a ventilating gas source, a closed circuit respiratory gas ventilating circuit connected to said ventilating gas source and having pressure relief means therein and a gas feed part connected into said gas ventilating circuit, said feed part having one end with an inlet portion and an outlet portion connected into said closed circuit respiratory gas ventilating circuit such that gas flows through said inlet portion and outlet portion, said gas feed part having a tubular intermediate portion communicating with said inlet and outlet portion, a breathing gas source first and second jet nozzles connected to said breathing gas source and extending into said tubular opposite end portion at spaced locations therein dischargeable in respective opposite axial directions to supply breathing gas into said tubular opposite end portion through said first and second jet nozzles, a patient connection means connected to said feed part at the opposite end thereof, and control means between said breathing gas source and said jet nozzles for alternately directing said breathing gas source to said jet nozzles so as to form suction areas in said feed part thereby inducing alternating, oppositely directed flows of the ventilation gas through said feed part between said closed circuit respiratory gas ventilation circuit and said patient connection means.
Claim 2
Dependent Claim
213 words
A respiratory gas system, comprising a ventilating gas source, a closed circuit respiratory gas ventilating circuit connected to said ventilating gas source and having pressure relief means therein and a gas feed part connected into said gas ventilating circuit, said feed part having one end with an inlet portion and an outlet portion connected into said closed circuit respiratory gas ventilating circuit such that gas flows through said inlet portion and outlet portion, said gas feed part having a tubular intermediate portion communicating with said inlet and outlet portion, a breathing gas source first and second jet nozzles connected to said breathing gas source and extending into said tubular opposite end portion at spaced locations therein dischargeable in respective opposite axial directions to supply breathing gas into said tubular opposite end portion through said first and second jet nozzles, a patient connection means connected to said feed part at the opposite end thereof, and control means between said breathing gas source and said jet nozzles for alternately directing said breathing gas source to said jet nozzles so as to form suction areas in said feed part thereby inducing alternating, oppositely directed flows of the ventilation gas through said feed part between said closed circuit respiratory gas ventilation circuit and said patient connection means.
Claim 3
Dependent Claim
58 words
A respiratory gas system according to claim 1 wherein said jet nozzles are directed towards each other and further including a flow guide mounted in said intermediate portion between said first and second jet nozzles and having a passage therethrough converging in the flow direction of the respective nozzles and located in the vicinity of the respective nozzles.
Claim 4
Dependent Claim
35 words
A respiratory system according to claim 2, wherein said flow guide comprises a tubular member having a passage therethrough having a portion converging inwardly from each end facing a respective one of said jet nozzles.
Claim 5
Dependent Claim
19 words
A respiratory system according to claim 1, including flow producing means in said closed circuit respiratory gas ventilation circuit.
Claim 6
Dependent Claim
22 words
A respiratory system according to claim 1, wherein said flow producing means comprises an ejector nozzle connected to said ventilating gas source.
Claim 7
Dependent Claim
20 words
A respiratory system according to claim 1, including a CO 2 absorber in said closed circuit respiratory gas ventilation circuit.
Claim 8
Dependent Claim
21 words
A respiratory gas system according to claim 1 wherein said pressure relief means includes a relief valve for relieving excess pressure.
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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) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |