Patent US3721235A successfully refreshed from Google Patents.
US3721235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bubble transfer device for open system scuba diving applications
Assignee: Individual
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Filing: 1971-07-19
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Granted: 1973-03-20
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Expires: 1991-07-19
Abstract
Abstract A device readily attached to a conventional scuba regulator mouthpiece ensures a controlled venting of exhaust gases at a remote location thusly removing bubbles from the diver''s immediate vicinity. Exhaust gases are fed into a hollow body member and outwardly displace a flexible diaphragm member. Outward displacement of the diaphragm member removes it from its position normally sealing the inlet orifice of an exhaust tube leading to the remote location. Immediately after the exhalation portion of the breathing cycle, the diaphragm member is returned to its normally sealing position on the exhaust tube to prevent free flow of the scuba regulator during the remainder of the breathing cycle.
Inventors
- 👤 S Ball
- 👤 G Keck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:46
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A device for ensuring the controlled venting of exhaust gases from demand type scuba to an area of lower ambient pressure comprising: a body member provided with a cavity and a first and second fitting communicating therewith, the first fitting being coupled to receive said exhaust gases from said scuba; an exhaust tube extending through said second fitting and having its inner end disposed in said cavity; a flotation element carried on a remotely extending portion of said exhaust tube ensuring said area of lower ambient pressure and a diaphragm member reaching across said cavity to form a chamber and lying across said inner end in a position normally sealing said area of lower ambient pressure from said scuba, said diaphragm member having a flexibility to permit its being orthogonally displaced from its normally sealing position when said exhaust gases are vented through said first opening to said chamber allowing their passage through said exhaust tube and to said area of lower ambient pressure only while exhaling from said scuba.
Claim 2
Independent Claim
170 words
A device for ensuring the controlled venting of exhaust gases from demand type scuba to an area of lower ambient pressure comprising: a body member provided with a cavity and a first and second fitting communicating therewith, the first fitting being coupled to receive said exhaust gases from said scuba; an exhaust tube extending through said second fitting and having its inner end disposed in said cavity; a flotation element carried on a remotely extending portion of said exhaust tube ensuring said area of lower ambient pressure and a diaphragm member reaching across said cavity to form a chamber and lying across said inner end in a position normally sealing said area of lower ambient pressure from said scuba, said diaphragm member having a flexibility to permit its being orthogonally displaced from its normally sealing position when said exhaust gases are vented through said first opening to said chamber allowing their passage through said exhaust tube and to said area of lower ambient pressure only while exhaling from said scuba.
Claim 3
Dependent Claim
35 words
A device according to claim 1 further including: a diaphragm stiffener center section mounted on the outer surface of said diaphragm member to ensure said normally sealing during the inhale portion of said breathing cycle.
Claim 4
Dependent Claim
28 words
A device according to claim 2 further including: a purge valve unit extending through a wall of said body member to permit purging of water from said chamber.
Claim 5
Dependent Claim
53 words
A device according to claim 3 further including: a U-shaped section of said exhaust tube in fluid communication with said remotely extending portion and wrapped around said flotation element to place the venting port of said exhaust tube in a downwardly facing orientation to prevent flooding of said exhaust tube and said chamber.
Claim 6
Dependent Claim
21 words
A device according to claim 4 in which the device is fabricated from anti-corrosive and corrosion resistant materials ensuring prolonged reliability.
Claim 7
Dependent Claim
23 words
A device according to claim 5 in which said exhaust tube has a sufficient length to ensure the remote venting of exhaust gases.
References Cited (Backward Citations)
CA621398A
Cited
US2939457A
Cited
US3292618A
Cited
US3375839A
Cited
US3480011A
Cited
US3474782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |