Patent US2792861A successfully refreshed from Google Patents.
US3603308A
Expired / Lapsed
US
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Intermittent positive pressure breathing device
Assignee: Airco Inc
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Filing: 1968-07-15
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Granted: 1971-09-07
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Expires: 1988-07-15
Abstract
Abstract A hand-held respirator comprising a gas pressure source, exhaust port means and a plurality of tubular elements in a substantially tee shape with the leg of the tee having a pressure relief valve for patient exhalation to atmosphere, an air intake valve for controlling ambient air inflow, and inhalation and exhalation passages; with the head of the tee having a nebulizer at one end receiving gas from said pressure source therethrough for flow directly to the patient and a mouthpiece at the other end for passing gas from said source with air to the patient, the gas flow through the nebulizer and mouthpiece when the exhaust port means is closed being maintained distinct until reaching the patient.
Inventors
- 👤 Joseph W Spradling
- 👤 John P Kayser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:44
CPC Classifications
A; A61; A61M; A61M11/00; A61M11/06; A61M16/00; A61M16/10; A61M16/12; A61M16/122; A61M16/125
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
A breathing device having a gas pressure source, conduit means being connected to said source and adapted to convey gas from said source to a patient, said conduit means comprising first and second inhalation flow passages, said first inhalation passage having valve means for permitting a desired inflow of ambient air and communicating between said source and the patient and atmosphere and the patient, said second inhalation flow passage communicating between said source and the patient and having nebulizer means including an extension tube at the outlet of said nebulizer means adapted to conduct the entire flow output of said nebulizer means to said patient distinct from the flow output of any other inhalation flow passage, said conduit means further comprising at least one exhalation flow passage communicating between the patient and atmosphere and having pressure relief means whereby the ambient air concentration or inhalation may be controlled and the patient may exhale through said pressure relief means, and said conduit further comprises a third passage communicating with atmosphere whereby the closing of said third passage permits inhalation and the opening of said third passage permits exhalation through the device.
Claim 2
Dependent Claim
190 words
A breathing device having a gas pressure source, conduit means being connected to said source and adapted to convey gas from said source to a patient, said conduit means comprising first and second inhalation flow passages, said first inhalation passage having valve means for permitting a desired inflow of ambient air and communicating between said source and the patient and atmosphere and the patient, said second inhalation flow passage communicating between said source and the patient and having nebulizer means including an extension tube at the outlet of said nebulizer means adapted to conduct the entire flow output of said nebulizer means to said patient distinct from the flow output of any other inhalation flow passage, said conduit means further comprising at least one exhalation flow passage communicating between the patient and atmosphere and having pressure relief means whereby the ambient air concentration or inhalation may be controlled and the patient may exhale through said pressure relief means, and said conduit further comprises a third passage communicating with atmosphere whereby the closing of said third passage permits inhalation and the opening of said third passage permits exhalation through the device.
Claim 3
Dependent Claim
43 words
A breathing device as defined in claim 1 wherein said valve means in said first inhalation passage includes aperture means in said conduit means and a movable closure element adapted to overlie said aperture means and adjustably regulate the inflow of ambient air.
Claim 4
Dependent Claim
42 words
A breathing device as defined in claim 2 wherein said aperture means comprises a plurality of apertures of dissimilar size and said closure element is adapted to allow the inflow of ambient air through at least one of said plurality of apertures.
Claim 5
Dependent Claim
29 words
A breathing device as defined in claim 2 wherein said pressure relief means comprises a check valve adapted to vent the exhaled breath of a patient to the atmosphere.
References Cited (Backward Citations)
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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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |