Patent US3827433A successfully refreshed from Google Patents.
US3827433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiratory device and procedure
Assignee: Massachusetts Institute of Technology
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Filing: 1972-03-07
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Granted: 1974-08-06
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Expires: 1992-03-07
Abstract
Abstract Applying positive end expiratory pressure breathing assistance to, for example, an infant by enclosing the infant''s face in a gas-tight mask, providing inhalation air into the mask, and restricting the passage for exhaled air from the mask, such as by immersing the end of the passage in a liquid, to maintain a positive pressure above ambient pressure in the passage, and hence within the mask.
Inventors
- 👤 D Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:12
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/06; A61M16/0683; A61M16/0605; A61M16/0633; A61M16/04; A61M16/0463; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3348
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A device for use in applying positive end expiratory pressure to a person comprising a mask with a gas-tight enclosure capable of substantially enclosing a person''s face between forehead and chin, an inhalation tube for supplying air to the enclosure and means to supply air continuously to said enclosure through said inhalation tube, an exhalation tube for directing exhaled air at above ambient pressure out of the enclosure, means for maintaining a positive pressure in said exhalation tube, whereby a positive pressure is maintained in said mask at all times and an additional apperture for gaining access to said enclosure without interrupting the gas-tight seal of said enclosure, said additional apperture having a length of unrestricted flexible tube passing therethrough of a length suitable for insertion into a person''s stomach.
Claim 2
Independent Claim
130 words
A device for use in applying positive end expiratory pressure to a person comprising a mask with a gas-tight enclosure capable of substantially enclosing a person''s face between forehead and chin, an inhalation tube for supplying air to the enclosure and means to supply air continuously to said enclosure through said inhalation tube, an exhalation tube for directing exhaled air at above ambient pressure out of the enclosure, means for maintaining a positive pressure in said exhalation tube, whereby a positive pressure is maintained in said mask at all times and an additional apperture for gaining access to said enclosure without interrupting the gas-tight seal of said enclosure, said additional apperture having a length of unrestricted flexible tube passing therethrough of a length suitable for insertion into a person''s stomach.
Claim 3
Dependent Claim
18 words
A device according to claim 1 wherein said enclosure and said tubes are formed of a translucent plastic.
Claim 4
Dependent Claim
46 words
A device according to claim 2 including a layer of soft resilient sealing material disposed about the inner periphery of the enclosure so as to be located between the enclosure and face, said material being conformable to the contours of a face in a gas-tight seal.
Claim 5
Dependent Claim
16 words
A device according to claim 3 wherein said resilient material is a closed-cell silicone rubber foam.
Claim 6
Dependent Claim
48 words
A device according to claim 3 wherein said plastic enclosure is generally shaped to conform to the contours of an infant''s face, and the sealing material is of a thickness sufficient to prevent contact of the plastic and the face when the mask is secured in gas-tight seal.
Claim 7
Dependent Claim
46 words
A device according to claim 1 including at least one adjustable fastening strap for securing the mask said strap being of sufficient length to surround a head and being detachably mounted at at least one side of said mask and secured to the other side thereof.
Claim 8
Dependent Claim
41 words
A device according to claim 6 including a first flexible sealing strap located to be secured to the mask at opposite sides of the face, and a second strap located to be secured to the mask at the forehead and chin.
Claim 9
Independent Claim
170 words
A method of assisting spontaneous breathing of a person by applying positive end expiratory pressure to the person, said method comprising the steps of: providing a mask comprising an enclosure constructed to enclose a person''s face between forehead and chin and having a peripheral sealing region, an inhalation tube into said enclosure, an exhalation tube out of said enclosure and an additional apperture in said mask, said additional apperture having a flexible unrestricted tube of a length suitable for insertion into the person''s stomach passing through said apperture, securing said mask to the face of said person to form an air-tight seal at said peripheral sealing region sealing the person''s nose and mouth within the enclosure, maintaining a positive pressure in the lungs during the entire breathing cycle by supplying air continuously to said enclosure through the inhalation tube and maintaining a positive pressure above ambient pressure in the exhalation tube, and locating one end of said unrestricted tube in the person''s stomach and exhausting air therefrom through said apperture.
Claim 10
Independent Claim
170 words
A method of assisting spontaneous breathing of a person by applying positive end expiratory pressure to the person, said method comprising the steps of: providing a mask comprising an enclosure constructed to enclose a person''s face between forehead and chin and having a peripheral sealing region, an inhalation tube into said enclosure, an exhalation tube out of said enclosure and an additional apperture in said mask, said additional apperture having a flexible unrestricted tube of a length suitable for insertion into the person''s stomach passing through said apperture, securing said mask to the face of said person to form an air-tight seal at said peripheral sealing region sealing the person''s nose and mouth within the enclosure, maintaining a positive pressure in the lungs during the entire breathing cycle by supplying air continuously to said enclosure through the inhalation tube and maintaining a positive pressure above ambient pressure in the exhalation tube, and locating one end of said unrestricted tube in the person''s stomach and exhausting air therefrom through said apperture.
Claim 11
Independent Claim
130 words
A device for use in applying positive end expiratory pressure to a person comprising a mask with a gas-tight enclosure capable of substantially enclosing a person''s face between the forehead and chin, an inhalation tube for supplying air to the enclosure, an exhalation tube for directing exhaled air at above ambient pressure out of the enclosure, said exhalation tube having a free end immersed in a liquid to maintain a positive pressure in said exhalation tube whereby a positive pressure is maintained in said mask at all times, and an additional apperture for gaining access to said enclosure without interrupting the gas-tight seal of said enclosure, said additional apperture having a flexible unrestricted tube passing therethrough of a length suitable for insertion into a person''s stomach to exhaust air therefrom.
Claim 12
Independent Claim
130 words
A device for use in applying positive end expiratory pressure to a person comprising a mask with a gas-tight enclosure capable of substantially enclosing a person''s face between the forehead and chin, an inhalation tube for supplying air to the enclosure, an exhalation tube for directing exhaled air at above ambient pressure out of the enclosure, said exhalation tube having a free end immersed in a liquid to maintain a positive pressure in said exhalation tube whereby a positive pressure is maintained in said mask at all times, and an additional apperture for gaining access to said enclosure without interrupting the gas-tight seal of said enclosure, said additional apperture having a flexible unrestricted tube passing therethrough of a length suitable for insertion into a person''s stomach to exhaust air therefrom.
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |