US3859994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diving equipment
Assignee: Linde Sverige AB
•
Filing: 1972-06-29
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Granted: 1975-01-14
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Expires: 1992-06-29
Abstract
Abstract A diving equipment for deep diving and comprising a station including a source of gas for the diver or divers. The station may be disposed either above the water surface or submerged therebelow, and is provided with one or more supply conduits for the helmet-carrying divers who may move both above and beneath the level of the station. From the diver or divers, the exhalation gas is returned to the station through return conduits. The portion of the supply conduit within the station is provided with a pressure regulator for the respective diver. In the return conduit, a predetermined subatmospheric pressure is established.
Inventors
- 👤 Hans Olof Almqvist
- 👤 Gosta H Fahlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
241 words
A diving apparatus for supplying a diver with breathing air to great depths comprising: a main station, a diver''s helmet, a gas source means at said station, means including a supply conduit for supplying gas to the diver''s helmet, a vacuum pump at the said station, means including a return conduit for connecting the vacuum pump to the said diver''s helmet for evacuating exhalation gases from the helmet, control means in the supply conduit and located at the station downstream from the pressure regulator and operatively connected with the pressure regulator for sensing an increase in pressure as the diver moves downstream with respect to the station and a decrease in pressure in the supply conduit as the diver moves upward with respect to the station resulting in an adjustment at the pressure regulator so as to supply a higher or lower gas pressure, respective of the diver''s movement with respect to the station, into the supply conduit, thereby maintaining constant the absolute rate of gas flow of breathing gas through the supply conduit for maintaining constant the absolute rate of gas flow of breathing gas through the supply conduit and a vacuum-pressure regulator means in the return conduit near the helmet for regulating the sub-atmospheric pressure in the return conduit to keep the resistance of the diver to exhalation independent of the sub-atmospheric pressure generated by the said vacuum pump at different depths of the diver relative to the station.
Claim 2
Dependent Claim
241 words
A diving apparatus for supplying a diver with breathing air to great depths comprising: a main station, a diver''s helmet, a gas source means at said station, means including a supply conduit for supplying gas to the diver''s helmet, a vacuum pump at the said station, means including a return conduit for connecting the vacuum pump to the said diver''s helmet for evacuating exhalation gases from the helmet, control means in the supply conduit and located at the station downstream from the pressure regulator and operatively connected with the pressure regulator for sensing an increase in pressure as the diver moves downstream with respect to the station and a decrease in pressure in the supply conduit as the diver moves upward with respect to the station resulting in an adjustment at the pressure regulator so as to supply a higher or lower gas pressure, respective of the diver''s movement with respect to the station, into the supply conduit, thereby maintaining constant the absolute rate of gas flow of breathing gas through the supply conduit for maintaining constant the absolute rate of gas flow of breathing gas through the supply conduit and a vacuum-pressure regulator means in the return conduit near the helmet for regulating the sub-atmospheric pressure in the return conduit to keep the resistance of the diver to exhalation independent of the sub-atmospheric pressure generated by the said vacuum pump at different depths of the diver relative to the station.
Claim 3
Dependent Claim
34 words
A diving apparatus according to claim 1, said control means comprising a restriction in the supply conduit and fluid lines from both sides of the restriction to said pressure regulator to control tHe latter.
Claim 4
Dependent Claim
34 words
A diving apparatus according to claim 2, wherein said apparatus is adapted to supply gas from the station to more than one diver, and including a separate supply and return conduit for each diver.
Claim 5
Dependent Claim
92 words
A diving apparatus according to claim 1, including surge tanks located at the station and connected, one to the supply conduit and one to the return conduit, each of said surge tanks comprising a relief valve on the side thereof away from their respective conduits, the relief valve of the surge tank in the supply conduit being openable at a predetermined over pressure, and the relief valve for the surge tank of the return conduit limiting the sub-atmospheric pressure in this return conduit and its associated surge tank to a predetermined value.
Claim 6
Dependent Claim
41 words
A diving apparatus according to claim 1, including an emergency gas source including an auxiliary gas container carried by the diver and connected to the supply conduit between the helmet and a non-return valve in the supply conduit near the diver.
References Cited (Backward Citations)
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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) | 1978-01-13 | 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 |