US3859995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing assist apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1973-07-02
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Granted: 1975-01-14
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Expires: 1993-07-02
Abstract
Abstract A breathing assist device for deep sea divers and the like including a reversible jet pump powered from a breathing gas supply and controlled by a diaphragm actuated two position poppet valve which operates in response to the pressure differential occurring across the jet pump during a ventilation cycle.
Inventors
- 👤 John R Colston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:39
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
307 words
Breathing assist apparatus in a system having a breathing input/output device coupling the respiratory system to a source of breathing gas, comprising in combination: a reversible jet pump, having a pair of opposed aspirators each including a supply nozzle, said supply nozzles being directed toward one another and respectively located at either end of a converging-diverging throat section including a common relatively narrow intermediate portion, and flared end portions; means coupling one end portion of said jet pump to said input/output device; input means coupling said source of breathing gas to the other end portion of said jet pump; output means also coupled to said other end portion of said jet pump for removing exhaled gases therefrom; a gas power source; valve means having bi-stable operating states being operable to alternately couple each of said supply nozzles To said gas power source whereby in a first operating state the supply nozzle located at said other end of said jet pump operates to pump breathing gas toward said input/output device through said thraot section and in a second operating state said supply nozzle located at said one end of said jet pump operates to pump exhaled gas to said output means through said throat section; means responsive to the pressure differential between each end portion of said jet pump in the region of said supply nozzles for actuating said valve means and comprising a pressure chamber including a diaphragm, in parallel relationship to said reversible jet pump, dividing said pressure chamber into two parts and additionally including a first channel coupling the region at said one end of said jet pump to one part of said chamber and a second channel coupling the region of the other end of said jet pump to said second part of said chamber; and means coupling said diaphragm to said valve means.
Claim 2
Dependent Claim
307 words
Breathing assist apparatus in a system having a breathing input/output device coupling the respiratory system to a source of breathing gas, comprising in combination: a reversible jet pump, having a pair of opposed aspirators each including a supply nozzle, said supply nozzles being directed toward one another and respectively located at either end of a converging-diverging throat section including a common relatively narrow intermediate portion, and flared end portions; means coupling one end portion of said jet pump to said input/output device; input means coupling said source of breathing gas to the other end portion of said jet pump; output means also coupled to said other end portion of said jet pump for removing exhaled gases therefrom; a gas power source; valve means having bi-stable operating states being operable to alternately couple each of said supply nozzles To said gas power source whereby in a first operating state the supply nozzle located at said other end of said jet pump operates to pump breathing gas toward said input/output device through said thraot section and in a second operating state said supply nozzle located at said one end of said jet pump operates to pump exhaled gas to said output means through said throat section; means responsive to the pressure differential between each end portion of said jet pump in the region of said supply nozzles for actuating said valve means and comprising a pressure chamber including a diaphragm, in parallel relationship to said reversible jet pump, dividing said pressure chamber into two parts and additionally including a first channel coupling the region at said one end of said jet pump to one part of said chamber and a second channel coupling the region of the other end of said jet pump to said second part of said chamber; and means coupling said diaphragm to said valve means.
Claim 3
Dependent Claim
22 words
The apparatus as defined by claim 1 and additionally including another jet pump coupling said gas power source to said valve means.
Claim 4
Dependent Claim
50 words
The apparatus as defined by claim 2 wherein said another jet pump comprises a uni-directional device including a nozzle and a throat section, and additionally including a gas conduit coupling said one end portion of said reversible jet pump to the region of said another jet pump including the nozzle.
Claim 5
Dependent Claim
41 words
The apparatus as defined by claim 3 and additionally including an adjustable variable flow conduit between the last recited conduit and the output of the throat section of said another jet pump for controlling the output pressure from said supply nozzles.
Claim 6
Dependent Claim
42 words
The apparatus as defined by claim 1 wherein said source of breathing gas and said gas power source comprise a single breathable gas supply including first and second coupling means respectively coupling said supply to said input means and said valve means.
Claim 7
Dependent Claim
23 words
The invention as defined by claim 5 and additionally including a jet pump coupled between said second coupling means and said valve means.
Claim 8
Dependent Claim
67 words
The apparatus as defined by claim 1 wherein said system additionally includes a first breathing bag coupled to said output means for receiving exhaled gases, exhaled gas reconditioning means coupled to said first breathing bag, and a second breathing bag coupled between said gas reconditioning means and said input means, and wherein said gas power source comprises a replenish breathing gas supply coupled to said valve means.
Claim 9
Dependent Claim
24 words
The apparatus as defined by claim 7 and additionally including a uni-directional jet pump coupled between said replenish gas supply and said valve means.
Claim 10
Dependent Claim
46 words
The apparatus as defined by claim 7 and additionally including pressure relief valve means coupled to said first breathing bag, and wherein said gas power source is comprised of a remote supply and additionally including an umbilical line coupling said remote supply to said valve means.
Claim 11
Dependent Claim
24 words
The apparatus as defined by claim 9 wherein said remote gas supply is adapted to supply a helium-oxygen mixture to said breathing assist apparatus.
Claim 12
Dependent Claim
23 words
The apparatus as defined by claim 10 and additionally including a second jet pump coupled between said umbilical line and said valve means.
Claim 13
Dependent Claim
66 words
The apparatus as defined by claim 1 wherein said source of breathing gas and said gas power source comprise a common breathing gas supply situated at a remote location and additionally including a first umbilical line means coupling said common supply to said input means and said valve means, and a second umbilical line coupling said output means to said remote location for returning exhaled gases.
Claim 14
Dependent Claim
14 words
The apparatus as defined by claim 12 wherein said remote location comprises a habitat.
References Cited (Backward Citations)
US2547458A
Cited
US2483698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |