Patent US3900127A successfully refreshed from Google Patents.
US3900127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing assembly in tank
Assignee: Voestalpine AG
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Filing: 1973-11-30
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Granted: 1975-08-19
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Expires: 1993-11-30
Abstract
Abstract The sealing assembly serves to seal an annular gap between a tank wall and a floating top of a tank. A flexible sealing skirt is sealed to the periphery of the floating top and bridges the annular gap. A resilient cover slopes down toward and is tightly secured to the top rim of the floating top. A plurality of peripherally spaced leaf springs are secured to the periphery of the floating top. Each of said leaf springs has diverging upper and lower resilient legs, which extend upwardly and downwardly, respectively, from said floating top toward said tank wall. Said upper legs have free ends, to which said resilient cover and an upper resilient profiled sealing member are secured and by which said upper profiled sealing member is forced into sealing engagement with said tank wall along a peripheral line thereof. Said lower legs have free ends, to which said sealing skirt and a lower resilient profiled sealing member are secured and by which said lower profiled sealing member is forced into sealing engagement with said tank wall along a peripheral line thereof.
Inventors
- 👤 Karl Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/46
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
In a large tank having a tankwall and a floating top which has a top rim and defines an annular gap with said tank wall, the provision of an assembly for sealing said annular gap, which assembly comprises a flexible sealing skirt, which is sealed to the periphery of said floating top and bridges said annular gap, a flexible cover, which slopes down toward and is tightly secured to the top rim of said floating top, upper and lower resilient profiled sealing members, and a plurality of peripherally spaced apart leaf springs, which are secured to the periphery of said floating top, each of said leaf springs having diverging, upper and lower resilient legs, which extend upwardly and downwardly, respectively, from said floating top toward said tank wall, said upper legs having free ends, to which said cover and said upper profiled sealing member are secured and by which said upper profiled sealing member is forced into sealing engagement with said tank wall along a peripheral line thereof, said lower legs having free ends, to which said sealing skirt and said lower profiled sealing member are secured and by which said lower profiled sealing member is forced into sealing engagement with said tank wall along a peripheral line thereof.
Claim 2
Dependent Claim
209 words
In a large tank having a tankwall and a floating top which has a top rim and defines an annular gap with said tank wall, the provision of an assembly for sealing said annular gap, which assembly comprises a flexible sealing skirt, which is sealed to the periphery of said floating top and bridges said annular gap, a flexible cover, which slopes down toward and is tightly secured to the top rim of said floating top, upper and lower resilient profiled sealing members, and a plurality of peripherally spaced apart leaf springs, which are secured to the periphery of said floating top, each of said leaf springs having diverging, upper and lower resilient legs, which extend upwardly and downwardly, respectively, from said floating top toward said tank wall, said upper legs having free ends, to which said cover and said upper profiled sealing member are secured and by which said upper profiled sealing member is forced into sealing engagement with said tank wall along a peripheral line thereof, said lower legs having free ends, to which said sealing skirt and said lower profiled sealing member are secured and by which said lower profiled sealing member is forced into sealing engagement with said tank wall along a peripheral line thereof.
Claim 3
Dependent Claim
63 words
An assembly as set forth in claim 1, in which each of said leaf springs has a web which connects said two legs and bears on a surface portion of said floating top, said web has a web portion spaced from said surface portion, and an adjustable fixing screw extends through said spaced web portion and is adjustably fixed to said surface portion.
Claim 4
Dependent Claim
87 words
An assembly as set forth in claim 1, in which each of said profiled sealing members is strip-shaped and has jawlike portions, said jawlike portions of said upper profiled sealing member embrace said free ends of said upper resilient legs and the outer edge of said cover, said jawlike portions of said lower profiled sealing mEmber embrace said free ends of said lower resilient legs and the outer edge of said sealing skirt, and said profiled sealing members are provided on their outside with protruding longitudinal ribs.
Claim 5
Dependent Claim
92 words
An assembly as set forth in claim 1, in which said resilient legs are pivotally movable up to a predetermined angle, and at least part of said resilient legs carry slidable fingers, which are disposed on that side of the associated profiled sealing member which faces the tank wall and have a portion which is angled from said tank wall at an angle which is at least as large as said predetermined angle and extends around and tightly contacts the associated profiled sealing member where it is nearest to the tank wall.
Claim 6
Dependent Claim
43 words
An assembly as set forth in claim 4, in which said portion of each of said slidable fingers has a straight sub-portion extending from the profiled sealing member and an end portion which is angled from said sub-portion toward said profiled sealing member.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |