Patent US3688720A successfully refreshed from Google Patents.
US3688720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bathyal unit
Assignee: NEREID
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Filing: 1970-07-01
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Granted: 1972-09-05
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Expires: 1990-07-01
Abstract
Abstract A deep-sea unit having a float and ballast chamber distinct from the crew accommodation, the float and ballast chamber being adapted to be pressurized so as to subject the wall thereof to an internal pressure slightly in excess of the external pressure from the ambient water at the operating depth. This construction permits the use of relatively light material.
Inventors
- 👤 Harmannus Henderikus Lok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:07
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/34; B63C11/36; B63C11/42; B63G; B63G8/00; B63G8/14; B63G8/22; B63G8/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
An apparatus for deep-sea operations comprising a working compartment, and at least oNe separate float chamber secured to said working compartment, said float chamber being sealed against the normal ingress of water and having gas therein under a high pressure that is greater than the external pressure at the selected operating depths and wherein tensile stress occurs in the entire wall of the float chamber under all operating conditions, and means for forcing ballast water into the float chamber directly with said gas and means for letting ballast water out of the float chamber under controlled conditions while maintaining the gas content thereof.
Claim 2
Independent Claim
103 words
An apparatus for deep-sea operations comprising a working compartment, and at least oNe separate float chamber secured to said working compartment, said float chamber being sealed against the normal ingress of water and having gas therein under a high pressure that is greater than the external pressure at the selected operating depths and wherein tensile stress occurs in the entire wall of the float chamber under all operating conditions, and means for forcing ballast water into the float chamber directly with said gas and means for letting ballast water out of the float chamber under controlled conditions while maintaining the gas content thereof.
Claim 3
Dependent Claim
54 words
An apparatus according to claim 1, characterized in that the means for letting out ballast water from the float chamber comprise a valve operable from said working compartment with the gas pressure of a value considerably higher than that of the external pressure at the operating depth functioning as means for expelling ballast water.
Claim 4
Dependent Claim
30 words
An apparatus according to claim 1, characterized in that the means for forcing in ballast water includes means for receiving ballast water being supplied under pressure from an external source.
Claim 5
Dependent Claim
26 words
Apparatus according to claim 1, characterized in that the means for forcing ballast water into the float chamber comprise a pump operable from the working compartment.
Claim 6
Dependent Claim
22 words
The apparatus of claim 1 wherein the pressure within said float chamber is entirely independent of the pressure within said working compartment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |