US3695261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-closed rebreathing apparatus
Assignee: CENTRAL FLORIDA IND PARK
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Filing: 1970-10-12
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Granted: 1972-10-03
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Expires: 1990-10-12
Abstract
Abstract A rebreathing apparatus adapted for connection to an open circuit demand type scuba device in which a rebreather system is used with compressed air supply tanks and demand regulators The rebreathing system has a lung bag for breathing into and out of connected in series with a CO2 scrubber for removing CO2 and an oxygen sensor for sensing the level of oxygen in the air of the rebreather. When the oxygen reaches a predetermined level, a solenoid actuates one or more exhaust valves for exhausting gas in the rebreather system allowing the demand regulator to draw additional air from the air supply tank. A manual over-rise is provided as is special solid state electronics for use in actuating the solenoid and warning lights or meters may be used.
Inventors
- 👤 Donald R Emmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/24; A; A62; A62B; A62B7/00; A62B7/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A semi-closed rebreather apparatus comprising in combination: A. gas supply means; B. demand regulator means connected to said gas supply means for supplying gas on demand from said gas supply means; C. mouthpiece connected to said demand regulator means for breathing into; and D. rebreather system coupled to said mouthpiece through said demand regulator means for rebreathing gas from said gas supply means having: a. a breathing bag coupled to said mouthpiece for inhaling gas from and exhausting gas thereinto b. carbondioxide scrubber means connected between said mouthpiece and said breathing bag for removing carbondioxide from said gas passing therethrough; c. control means, including an oxygen sensor means located in said rebreather system for sensing the level of oxygen in said rebreather system; and d. exhaust valve means connected to said rebreather system, and actuated by said control means upon the oxygen content in said rebreathing system reaching a predetermined level to exhaust gas from said rebreather system into the surrounding environment.
Claim 2
Dependent Claim
162 words
A semi-closed rebreather apparatus comprising in combination: A. gas supply means; B. demand regulator means connected to said gas supply means for supplying gas on demand from said gas supply means; C. mouthpiece connected to said demand regulator means for breathing into; and D. rebreather system coupled to said mouthpiece through said demand regulator means for rebreathing gas from said gas supply means having: a. a breathing bag coupled to said mouthpiece for inhaling gas from and exhausting gas thereinto b. carbondioxide scrubber means connected between said mouthpiece and said breathing bag for removing carbondioxide from said gas passing therethrough; c. control means, including an oxygen sensor means located in said rebreather system for sensing the level of oxygen in said rebreather system; and d. exhaust valve means connected to said rebreather system, and actuated by said control means upon the oxygen content in said rebreathing system reaching a predetermined level to exhaust gas from said rebreather system into the surrounding environment.
Claim 3
Dependent Claim
21 words
The apparatus according to claim 1 in which said gas supply means is a compressed air tank for holding compressed air.
Claim 4
Dependent Claim
35 words
The apparatus according to claim 1 in which said oxygen sensor includes threshold detection means for detecting when a voltage from said oxygen sensor reaches an adjustable predetermined level for activating said exhaust valve means.
Claim 5
Dependent Claim
25 words
The apparatus according to claim 3 in which said oxygen sensor means includes a meter for reading the level of oxygen in said rebreather system.
Claim 6
Dependent Claim
32 words
The apparatus according to claim 1 in which said exhaust valve means includes a directional valve allowing gas to escape into the surrounding water while preventing water from entering the rebreather system.
Claim 7
Dependent Claim
36 words
The apparatus according to claim 5 in which said exhaust valve means includes a solenoid actuated valve for directing air to said breathing bag in one position and through said directional valve in a second position.
Claim 8
Dependent Claim
19 words
The apparatus according to claim 6 in which said solenoid actuated valve has a manual over-ride for manual operation.
Claim 9
Dependent Claim
19 words
The apparatus according to claim 4 in which said oxygen sensor includes an amplifier for amplifying signal produced thereby.
Claim 10
Dependent Claim
25 words
The apparatus according to claim 8 in which said oxygen sensor includes a negative temperature coefficient thErmistor for controlling variations in temperature in said sensor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |