Patent FR2647681A1 successfully refreshed from Google Patents.
US3581742A
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US
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Intermittent positive pressure breathing device
Assignee: MEDICAL SERVICES Inc
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Filing: 1968-06-11
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Granted: 1971-06-01
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Expires: 1988-06-11
Abstract
Abstract An intermittent positive pressure breathing (IPPB) device permits variable adjustment of maximum flow rates, terminal flow rates, and nebulization for patients having various lung disorders.
Inventors
- 👤 Joseph G Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:38
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/021; A61M16/10; A61M16/12; A61M16/122; A61M16/125; A61M16/127; A61M16/0057; A61M16/0063
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
Apparatus for lung ventilation comprising, a breathing manifold assembly a venturi chamber body connected to said assembly having: an Injector nozzle, a venturi throat, a venturi chamber behind said throat and around said nozzle, the position of said nozzle outlet relative to said throat to permit high initial flow rate, within the range of 25-90 liters/min. to said assembly, an intake check valve located in communication with said chamber to permit flow unidirectionally into said chamber, a variable size exhaust port to provide communication from the chamber to the exterior, means to supply fluid pressure to said nozzle inlet, and a flow control bypass valve connected to said inlet which, when closed, forces said fluid into said nozzle.
Claim 2
Dependent Claim
118 words
Apparatus for lung ventilation comprising, a breathing manifold assembly a venturi chamber body connected to said assembly having: an Injector nozzle, a venturi throat, a venturi chamber behind said throat and around said nozzle, the position of said nozzle outlet relative to said throat to permit high initial flow rate, within the range of 25-90 liters/min. to said assembly, an intake check valve located in communication with said chamber to permit flow unidirectionally into said chamber, a variable size exhaust port to provide communication from the chamber to the exterior, means to supply fluid pressure to said nozzle inlet, and a flow control bypass valve connected to said inlet which, when closed, forces said fluid into said nozzle.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1 including a relief valve downstream of said venturi chamber body adapted to open upon a given pressure created within said lungs.
Claim 4
Dependent Claim
13 words
Apparatus of claim 2 wherein said valve provides an audible signal on opening.
Claim 5
Dependent Claim
49 words
Apparatus of claim 3 wherein said valve includes a valve seat, a valve, having a magnet therein, seatable upon said seat, a magnet adjustably situated opposite said valve magnet and oriented to attract said valve magnet until a given pressure overcomes said magnetic force to open said valve seat.
Claim 6
Dependent Claim
21 words
Apparatus of claim 1 wherein said intake check valve includes adjustment means to vary the intake flow rate into said chamber.
Claim 7
Dependent Claim
26 words
Apparatus of claim 1 wherein said breathing manifold assembly includes a mouthpiece, a nebulizer separately supplied with a portion of fluid pressure from said nozzle inlet.
Claim 8
Dependent Claim
21 words
Apparatus of claim 1 wherein said apparatus includes a separate motor driven compressor to supply fluid pressure to said nozzle inlet.
Claim 9
Dependent Claim
94 words
A patient''s inhalation therapy method comprising the steps of: providing flow of lung acceptable fluid to an inhalation means, and phasing said flow to provide, at the output of said means, an initial inhalation phase in which said flow rate is rapidly reducing followed by a terminal inhalation phase in which said flow rate is gradually reducing, said initial phase flow rates and said terminal phase flow rates being adjustable to preselected values independently of each other and independent of the desired ultimate pressure, within said patient''s lungs, at the end of said inhalation.
Claim 10
Dependent Claim
94 words
A patient''s inhalation therapy method comprising the steps of: providing flow of lung acceptable fluid to an inhalation means, and phasing said flow to provide, at the output of said means, an initial inhalation phase in which said flow rate is rapidly reducing followed by a terminal inhalation phase in which said flow rate is gradually reducing, said initial phase flow rates and said terminal phase flow rates being adjustable to preselected values independently of each other and independent of the desired ultimate pressure, within said patient''s lungs, at the end of said inhalation.
Claim 11
Dependent Claim
44 words
Method of claim 8 wherein the flow rate of said initial phase is within the range of about 20 to about 100 liters per minute reducing to said lower value at a given pressure within the range of 5 to 15 centimeters of water.
Claim 12
Dependent Claim
42 words
Method of claim 8 wherein flow rate (Fi) for said initial inhalation phase follows the approximate formula: Fi 80.7-3.05p-0.259p2; and said flow rate (Ft) for said terminal inhalation phase follows the approximate formula: Ft 46.3-2.621p+0.0417p2 where p pressure in cm of water.
References Cited (Backward Citations)
US1848232A
Cited
US2376348A
Cited
US3267935A
Cited
US3251359A
Cited
US3301255A
Cited
US3319627A
Cited
US3360007A
Cited
US3465752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |