US3795339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal ring for a floating tank roof
Assignee: Joint Francais SNC
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Filing: 1972-02-28
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Granted: 1974-03-05
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Expires: 1992-02-28
Abstract
Abstract A seal ring for a floating tank roof where the roof has lateral side walls adjacent the tank walls. The seal includes a pair of rubber strips that can enclose a resilient material. One of the rubber strips forms a loop at its lower portion to receive a pulley cable or tube for positioning the seal.
Inventors
- 👤 C Barbier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:28
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
205 words
In a fluid hydrocarbon storage tank or the like including a vertical cylindrical tank wall and horizontal floating roof transversely spanning the tank interior, said floating roof including an annular lateral wall facing said tank wall, and a sealing ring fixed to said lateral roof wall and contacting said tank wall for sealing said floating roof and said cylindrical tank wall, the improvement wherein: said sealing ring comprises a cover formed by first and second annular strips fixed at their upper edges commonly to said lateral roof wall, said first strip lying flush with said lateral roof wall and terminating in a closed loop at its lower edge, a circular reinforcing element within said loop and extending the full circumference of said lateral roof wall and means fixed to said lateral roof wall at circumferentially spaced locations and engaging said circular reinforcing element to maintain said first strip in contact with said lateral wall, said second strip being welded at its lower edge to said first trip intermediate of the top and bottom edges of said first strip, and a compressible material ring sealably enclosed within a cavity defined by said strip and maintaining said second strip in sealing contact with said vertical tank wall.
Claim 2
Dependent Claim
205 words
In a fluid hydrocarbon storage tank or the like including a vertical cylindrical tank wall and horizontal floating roof transversely spanning the tank interior, said floating roof including an annular lateral wall facing said tank wall, and a sealing ring fixed to said lateral roof wall and contacting said tank wall for sealing said floating roof and said cylindrical tank wall, the improvement wherein: said sealing ring comprises a cover formed by first and second annular strips fixed at their upper edges commonly to said lateral roof wall, said first strip lying flush with said lateral roof wall and terminating in a closed loop at its lower edge, a circular reinforcing element within said loop and extending the full circumference of said lateral roof wall and means fixed to said lateral roof wall at circumferentially spaced locations and engaging said circular reinforcing element to maintain said first strip in contact with said lateral wall, said second strip being welded at its lower edge to said first trip intermediate of the top and bottom edges of said first strip, and a compressible material ring sealably enclosed within a cavity defined by said strip and maintaining said second strip in sealing contact with said vertical tank wall.
Claim 3
Dependent Claim
33 words
A storage tank according to claim 1, wherein the loop is formed by folding the lower end of the first strip and welding that edge on the corresponding portion of the first strip.
Claim 4
Dependent Claim
14 words
A storage tank according to claim 2, wherein the element consists of a tube.
Claim 5
Dependent Claim
14 words
A storage tank according to claim 2, wherein the element consists of a cable.
Claim 6
Dependent Claim
43 words
A storage tank according to claim 2, wherein the first strip has, at its lower part, spaced notches interrupting the closed loop, and said means fixed to said lateral roof wall at circumferentially spaced locations engage the circular reinforcing element at said notches.
Claim 7
Dependent Claim
76 words
A storage tank according to claim 5, wherein said engaging means comprise angle irons, such that the lower part of the first strip is pressed against the lateral wall of the floating roof by means of the angle irons fixed on the lower part of the lateral wall of the roof and spaced at substantially the same interval as the notches from one another and ovelying said circular reinforcing element at positions exposed by said notches.
Claim 8
Dependent Claim
55 words
A storage tank according to claim 4, further including a pulley, the lower part of the first strip is pressed against the lateral wall of the floating roof by means of the pulley whose axis is fixed on the lower part of the lateral wall of the roof thereby providing the tightening of the cable.
Claim 9
Dependent Claim
59 words
A storage tank according to claim 7, further including a spring, one of the ends of the cable being fixed by means of the spring on the pulley, and the other end of the cable being engaged on the pulley and rising along the lateral edge of the roof and being fixed on the upper part of the roof.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |