US3889670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-invasive hyperbaric ventilator
Assignee: Individual
•
Filing: 1974-01-02
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Granted: 1975-06-17
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Expires: 1994-01-02
Abstract
Abstract A non-invasive hyperbaric ventilator system for the bronchopulmonary disorders of patients requiring positive pressure ventilation includes a Plexiglas chamber into which the patient''s head is inserted. A collar assembly around the patient''s neck seals the chamber and an adjustable pressure gauge for regulating gas delivery pressures to the chamber and an expiratory resistance valve cooperate to provide intermittent pressurization and depressurization of the ventilator. The chamber is provided with a plurality of studs and ports to accommodate the attachment of adjunctive devices.
Inventors
- 👤 Steven R Loveland
- 👤 Roy L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:40
CPC Classifications
A; A61; A61G; A61G10/00; A61G10/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
176 words
A non-invasive hyperbaric ventilator comprising a rigid chamber having a base structure, rear, front, top and side walls, a hinged hood formed from portions of said front, side and top walls, means for sealing said hood in the chamber closed position, a collar assembly having an opening for receiving the neck of a patient, said collar assembly having one portion in the portion of the front wall of said hood and a cooperating portion in the other portion of said front wall, sealing means closing said opening in said collar assembly and engaging the neck of a patient and said chamber to seal the patient''s head within said chamber to effect an air-tight chamber, means, including a gas inlet port, for regulating the therapeutic pressure within the chamber to a predetermined level and intermittently controlling the supply of gas to said chamber and facilitating expansion of the patient''s lungs during inspiration, and adjustable expiratory pressure relief means communicating with said chamber for permitting displacement of a volume of gas from said chamber when the patient exhales.
Claim 2
Dependent Claim
176 words
A non-invasive hyperbaric ventilator comprising a rigid chamber having a base structure, rear, front, top and side walls, a hinged hood formed from portions of said front, side and top walls, means for sealing said hood in the chamber closed position, a collar assembly having an opening for receiving the neck of a patient, said collar assembly having one portion in the portion of the front wall of said hood and a cooperating portion in the other portion of said front wall, sealing means closing said opening in said collar assembly and engaging the neck of a patient and said chamber to seal the patient''s head within said chamber to effect an air-tight chamber, means, including a gas inlet port, for regulating the therapeutic pressure within the chamber to a predetermined level and intermittently controlling the supply of gas to said chamber and facilitating expansion of the patient''s lungs during inspiration, and adjustable expiratory pressure relief means communicating with said chamber for permitting displacement of a volume of gas from said chamber when the patient exhales.
Claim 3
Dependent Claim
63 words
A non-invasive hyperbaric ventilator as recited in claim 1 wherein said expiratory pressure relief means comprises a normally closed valve including a weight member displaceable by increased pressure in said chamber due to the volume of gas that the patient''s lungs displace when the patient exhales thus permitting depressurization of said chamber to a selected level to control residual pressure within said chamber.
Claim 4
Dependent Claim
46 words
A non-invasive hyperbaric ventilator as recited in claim 1, wherein said expiratory pressure relief means comprises a container filled with a preselected amount of water and a conduit extending from said chamber and having an end portion selectively positioned below the water level in said container.
Claim 5
Dependent Claim
44 words
A non-invasive hyperbaric ventilator as recited in claim 1, wherein said sealing means comprises a collar assembly secured within said chamber opening and an inflatable member extending around the patient''s neck and supported within said collar assembly for safe sealing of the patient''s neck.
Claim 6
Dependent Claim
44 words
A non-invasive hyperbaric ventilator as recited in claim 4, wherein said chamber is provided with means releasably securing a collar assembly thereto, and said chamber opening is sufficiently large to accommodate collar assemblies of various sizes and neck sizes without modification to said chamber.
Claim 7
Dependent Claim
27 words
A non-invasive hyperbaric ventilator as recited in claim 1, and further including means for supplying a predetermined amount of moisture to the gas supplied to said chamber.
Claim 8
Dependent Claim
45 words
A non-invasive hyperbaric ventIlator as recited in claim 1, wherein said chamber is formed substantially entirely of transparent material and includes a base structure, a hood assembly pivotally secured thereto, and means for sealing and releasably securing said base structure and said hood assembly together.
Claim 9
Dependent Claim
53 words
A non-invasive hyperbaric ventilator as recited in claim 1, said chamber defining a port in an upper wall thereof for providing access to the patient and a removable sealable door for normally closing said port, said chamber further including a plurality of ports for accommodating the attachment of adjunctive devices to said chamber.
Claim 10
Dependent Claim
30 words
A non-invasive hyperbaric ventilator as recited in claim 1, and further including means for providing a patient access to ambient air in the event of unexpected depressurization of said chamber.
Claim 11
Dependent Claim
23 words
A non-invasive hyperbaric ventilator as recited in claim 1, and further including means for monitoring the pressure, humidity, and temperature within said chamber.
References Cited (Backward Citations)
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Cited
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US2543426A
Cited
US2700384A
Cited
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |