Patent US3669303A successfully refreshed from Google Patents.
US3669303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for the cover of a vessel with a circular opening
Assignee: Individual
•
Filing: 1971-01-13
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Granted: 1972-06-13
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Expires: 1991-01-13
Abstract
Abstract A seal for location between a vessel and a closure, which seal is of omega cross-section, one base being fast with the closure and one base bearing through resilient material on the vessel.
Inventors
- 👤 Pierre Launay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:44
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; F; F16; F16J; F16J13/00; F16J13/02; G21C13/028; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A seal for the cover of a vessel with a circular opening, characterized in that it comprises an annular metal element whose cross-section is in the form of an omega, of which one base is fixed to the cover and the other base is extended by a flange capable of bearing, by way of resilient material, on a bearing surface formed on the vessel.
Claim 2
Dependent Claim
64 words
A seal for the cover of a vessel with a circular opening, characterized in that it comprises an annular metal element whose cross-section is in the form of an omega, of which one base is fixed to the cover and the other base is extended by a flange capable of bearing, by way of resilient material, on a bearing surface formed on the vessel.
Claim 3
Dependent Claim
22 words
A seal as claimed in claim 1, characterized in that it comprises a flange-applying spring compressed between the flange and the cover.
Claim 4
Dependent Claim
41 words
A seal as claimed in claim 1, characterized in that the bearing surface of the flange contains at least one circular groove engaged by a resilient O-ring seal capable of being slightly flattened when the cover is put on the vessel.
Claim 5
Dependent Claim
32 words
A seal as claimed in claim 1, characterized in that the vessel has a circular tenon which projects from the bearing surface and can engage in a corresponding groove in the flange.
Claim 6
Dependent Claim
32 words
A seal as claimed in claim 1, characterized in that the vessel has a plurality of studs projecting from the bearing surface and capable of engaging in corresponding bores in the flange.
Claim 7
Dependent Claim
40 words
A seal as claimed in claim 1, characterized in that the chamber defined by thE annular omega-shaped element and the cover is traversed by coolant flowing along a supply and discharge circuit provided in the cover and in the vessel.
Claim 8
Dependent Claim
48 words
A seal as claimed in claim 1, characterized in that the side wall of the vessel and that portion of the cover covering the opening are covered with respective thicknesses of thermal insulation, which come into contact with one another when the cover is put on the vessel.
Claim 9
Dependent Claim
43 words
A seal as claimed in claim 7, characterized in that the thermal insulation on the cover is concealed by a protective covering which reveals that end of the insulation coming into contact with the thermal insulation covering the inside wall of the vessel.
References Cited (Backward Citations)
US3127050A
Cited
US2352038A
Cited
DE847093C
Cited
US2797017A
Cited
US3332573A
Cited
US3362567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |