US3680557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled atmosphere incubator system with oxygen probe
Assignee: Becton Dickinson and Co
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Filing: 1970-05-06
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Granted: 1972-08-01
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Expires: 1990-05-06
Abstract
Abstract An oxygen stream is supplied to an incubation hood for diffusion therein at a rate such that a concentrated oxygen layer forms in the hood lower interior at a zone about a patient''s head; displacement gas such as air is admitted into the hood upper interior to diffuse into the concentrated oxygen layer for reducing the oxygen concentration at the zone about the patient''s head, and to effect exhausting from the hood of downwardly displaced gas containing breath expelled carbon dioxide; and the oxygen supply is controlled in response to sensing of the oxygen concentration in the hood to maintain within a predetermined range the oxygen concentration at that zone.
Inventors
- 👤 Thaddeus M Doniguian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:06
CPC Classifications
A; A61; A61G; A61G11/00; A61G10/00; A61G10/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
220 words
In incubation apparatus, the combination comprising a. a hood having upright generally curvilinear wall means with aperture means to allow a patient''s head to extend into a hood lower interior zone, b. means including an oxygen inlet port to disperse oxygen in a gaseous stream into the hood and generally tangentially of said wall means for diffusion therein and characterized in that a concentrated oxygen layer forms in the hood lower interior and at said zone, the hood having upper and lower through opening means the upper opening means located near the hood top to pass atmospheric air entering the hood upper interior to diffuse into said layer at the top thereof, for reducing the oxygen concentration at said zone, and also for downwardly displacing gas in said layer containing breath expelled carbon dioxide for discharge to the hood exterior, the lower opening means located near the bottom of the hood wall to pass to the exterior gas including oxygen displaced in said layer, and c. control means to sense the oxygen concentration of gas in said layer and to control said oxygen supply thereby to maintain the oxygen concentration at said zone within a predetermined range, said control means including an oxygen sensor effectively located between the levels of the oxygen inlet port and the top of the hood.
Claim 2
Dependent Claim
220 words
In incubation apparatus, the combination comprising a. a hood having upright generally curvilinear wall means with aperture means to allow a patient''s head to extend into a hood lower interior zone, b. means including an oxygen inlet port to disperse oxygen in a gaseous stream into the hood and generally tangentially of said wall means for diffusion therein and characterized in that a concentrated oxygen layer forms in the hood lower interior and at said zone, the hood having upper and lower through opening means the upper opening means located near the hood top to pass atmospheric air entering the hood upper interior to diffuse into said layer at the top thereof, for reducing the oxygen concentration at said zone, and also for downwardly displacing gas in said layer containing breath expelled carbon dioxide for discharge to the hood exterior, the lower opening means located near the bottom of the hood wall to pass to the exterior gas including oxygen displaced in said layer, and c. control means to sense the oxygen concentration of gas in said layer and to control said oxygen supply thereby to maintain the oxygen concentration at said zone within a predetermined range, said control means including an oxygen sensor effectively located between the levels of the oxygen inlet port and the top of the hood.
Claim 3
Dependent Claim
58 words
The combination of claim 1 wherein said control means also includes a valve operable to control said oxygen supplying gaseous stream, and an operator responsive to the output of said sensor to control valve operation to increase and decrease the flow of said stream in response to decrease and increase respectively in the oxygen concentration at said zone.
Claim 4
Dependent Claim
51 words
The combination of claim 2 wherein said means to supply oxygen in said stream includes a flow diffuser at said hood and having porting located to direct the stream flow in paths circulating generally transversely under laminar flow conditions in the lower interior of the hood, thereby to produce said layer.
Claim 5
Dependent Claim
13 words
The combination of claim 1 wherein said hood comprises transparent plastic sheet material.
Claim 6
Dependent Claim
16 words
The combination of claim 4 wherein said sheet is flexible and has joined opposite end portions.
Claim 7
Dependent Claim
23 words
The combination of claim 1 including a radiant heater disposed to radiate heat downwardly through the opening proximate the top of the hood.
Claim 8
Dependent Claim
214 words
In incubation apparatus, the combination comprising a. a hood having upright generally curvilinear wall means with aperture means to allow a patient''s head to extend into a hood lower interior zone, b. means including an oxygen inlet port to disperse oxygen in a gaseous stream into the hood and generally tangentially of said wall means for diffusion therein and characterized in that a concentrated oxygen layer forms in the hood lower interior and at said zone, the hood upper and lower interiors each having such communication with the exterior via upper and lower through opening means respectively that displacement gas may enter the hood upper interior to diffuse into said layer at the top thereof, for reducing the oxygen concentration at said zone, and also for downwardly displacing gas in said layer containing breath expelled carbon dioxide for discharge to the hood exterior, c. control means to sense the oxygen concentration of gas in said layer and to control said oxygen supply thereby to maintain the oxygen concentration at said zone within a predetermined range, said control means including an oXygen sensor effectively located between the levels of the oxygen inlet port and the top of the hood, and d. a radiant heater overlying the hood to radiate heat downwardly into the hood interior.
Claim 9
Dependent Claim
214 words
In incubation apparatus, the combination comprising a. a hood having upright generally curvilinear wall means with aperture means to allow a patient''s head to extend into a hood lower interior zone, b. means including an oxygen inlet port to disperse oxygen in a gaseous stream into the hood and generally tangentially of said wall means for diffusion therein and characterized in that a concentrated oxygen layer forms in the hood lower interior and at said zone, the hood upper and lower interiors each having such communication with the exterior via upper and lower through opening means respectively that displacement gas may enter the hood upper interior to diffuse into said layer at the top thereof, for reducing the oxygen concentration at said zone, and also for downwardly displacing gas in said layer containing breath expelled carbon dioxide for discharge to the hood exterior, c. control means to sense the oxygen concentration of gas in said layer and to control said oxygen supply thereby to maintain the oxygen concentration at said zone within a predetermined range, said control means including an oXygen sensor effectively located between the levels of the oxygen inlet port and the top of the hood, and d. a radiant heater overlying the hood to radiate heat downwardly into the hood interior.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |