US3625415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating roof seal
Assignee: Pittsburgh Des Moines Steel Co
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Filing: 1970-03-27
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Granted: 1971-12-07
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Expires: 1990-03-27
Abstract
Abstract A floating roof seal includes an annular flexible band, the upper portion of which is connected to the roof and has a gastight seal with respect thereto. The lower portion of the band is connected to an annular ring means. The lower part of the band has hole means formed therethrough for admitting liquid between the ring means and the band from the tank. A plurality of spaced support members are loosely connected at the upper ends thereof to the roof and are loosely connected at the lower ends thereof to the ring means to permit movement of the ring means relative to the roof during use. An annular seal means may be supported by the ring means and engages the inner surface of the band. This annular seal means has hole means formed in the upper and lower parts thereof. The ring means may also be of variable size including a plurality of spring loaded relatively movable portions.
Inventors
- 👤 Ardell H Nelson
- 👤 Harold A Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:22
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/46
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
210 words
A liquid storage tank having a sidewall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced inwardly from the inner surface of said wall to provide an annular space between the roof and the tank, and a seal for said roof in association with said annular space comprising an annular flexible band, an annular ring means, said band having an upper portion connected to said roof and a lower portion spaced downwardly and outwardly from the upper portion and connected to said ring means in spaced relationship to said roof, said band defining a space therebeneath in communication with the liquid stored in the tank so that gas pressure between the roof and flexible band urges the band outwardly into sealing engagement with the wall, and support means connected at one end to said roof adjacent said upper portion of said band and connected at the other end to said ring means fOr supporting said ring means from the roof for movement relative to the roof during use, said support means disposed in the space beneath said band, said seal sealing said roof to said tank.
Claim 2
Dependent Claim
210 words
A liquid storage tank having a sidewall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced inwardly from the inner surface of said wall to provide an annular space between the roof and the tank, and a seal for said roof in association with said annular space comprising an annular flexible band, an annular ring means, said band having an upper portion connected to said roof and a lower portion spaced downwardly and outwardly from the upper portion and connected to said ring means in spaced relationship to said roof, said band defining a space therebeneath in communication with the liquid stored in the tank so that gas pressure between the roof and flexible band urges the band outwardly into sealing engagement with the wall, and support means connected at one end to said roof adjacent said upper portion of said band and connected at the other end to said ring means fOr supporting said ring means from the roof for movement relative to the roof during use, said support means disposed in the space beneath said band, said seal sealing said roof to said tank.
Claim 3
Dependent Claim
24 words
Apparatus as defined in claim 1, including an annular seal means supported by said ring means and engaging the inner surface of said band.
Claim 4
Dependent Claim
46 words
Apparatus as defined in claim 2, wherein said annular seal means has hole means in the lower part thereof, said band also having hole means in the lower part thereof whereby liquid in the tank is admitted between said ring means and said annular seal means.
Claim 5
Dependent Claim
21 words
Apparatus as defined in claim 3, wherein the upper part of said annular seal means also has hole means formed therethrough.
Claim 6
Dependent Claim
42 words
Apparatus as defined in claim 1, wherein said support means comprises a plurality of spaced support members each of which is connected at the upper end thereof to said roof and is connected at the lower end thereof to said ring means.
Claim 7
Dependent Claim
40 words
Apparatus as defined in claim 5, wherein the connections at the upper and lower ends of each of said support members allows relative movement of each of the support members with respect to the roof and the ring means respectively.
Claim 8
Dependent Claim
21 words
Apparatus as defined in claim 6, wherein the connections at the ends of each of said support members are loose connections.
Claim 9
Dependent Claim
41 words
Apparatus as defined in claim 6, wherein the connections at the upper end of each of said support members is readily releasable so as to facilitate removal of the seal from the top of the roof with the tank in service.
Claim 10
Dependent Claim
109 words
Apparatus as defined in claim 1, wherein the upper portion of said band has a gastight seal with said roof the lower part of said band having hole means formed therethrough for admitting liquid between said ring means and said band from the tank, said support means including a plurality of spaced support members each of which is connected at the upper end thereof to said roof and at the lower end thereof to said ring means, the connections at the upper and lower ends of each of said support members allowing relative movement between the ends of the support members and the roof and the ring means respectively.
Claim 11
Dependent Claim
80 words
Apparatus as defined in claim 9, including annular seal means supported by said ring means and engaging the inner surface of said band, said annular seal means having hole means formed in the lower part thereof for admitting liquid between said ring means and said annular seal means from the tank, said annular seal means also having hole means formed in the upper part thereof and being in communication with the gastight space defined between the roof and the band.
Claim 12
Dependent Claim
177 words
A liquid storage tank having a sidewall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced inwardly from the inner surface of said wall to provide an annular space between the roof and the tank, and a seal for sealing said annular spaces comprising an annular flexible band connected at an upper portion thereof to said roof, an annular ring means in said space, the lower portion of said band being connected to said ring means, and support means for supporting said ring means from the roof for movement relative to the roof during use, the upper portion of said annular flexible band having a gastight seal with said roof whereby gas pressure between the roof and the band maintains the band in contact with said inner surface, and the lower part of said band having hole means formed therethrough for admitting liquid between said ring means and said band from the tank.
Claim 13
Dependent Claim
177 words
A liquid storage tank having a sidewall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced inwardly from the inner surface of said wall to provide an annular space between the roof and the tank, and a seal for sealing said annular spaces comprising an annular flexible band connected at an upper portion thereof to said roof, an annular ring means in said space, the lower portion of said band being connected to said ring means, and support means for supporting said ring means from the roof for movement relative to the roof during use, the upper portion of said annular flexible band having a gastight seal with said roof whereby gas pressure between the roof and the band maintains the band in contact with said inner surface, and the lower part of said band having hole means formed therethrough for admitting liquid between said ring means and said band from the tank.
Claim 14
Dependent Claim
153 words
A liquid storage tank having a sidewall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced inwardly from the inner surface of said wall to provide an annular space between the roof and the tank, and a seal for said roof comprising an annular flexible band in said Annular space, an annular ring means in said annular space, the upper portion of said band being connected to said roof adjacent an upper portion thereof, the lower portion of said band being spaced downwardly and outwardly from said upper portion and connected to said ring means, and support means for supporting said ring means from the roof for movement relative to the roof during use, said ring means being of variable size and including a plurality of relatively movable portions.
Claim 15
Dependent Claim
153 words
A liquid storage tank having a sidewall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced inwardly from the inner surface of said wall to provide an annular space between the roof and the tank, and a seal for said roof comprising an annular flexible band in said Annular space, an annular ring means in said annular space, the upper portion of said band being connected to said roof adjacent an upper portion thereof, the lower portion of said band being spaced downwardly and outwardly from said upper portion and connected to said ring means, and support means for supporting said ring means from the roof for movement relative to the roof during use, said ring means being of variable size and including a plurality of relatively movable portions.
Claim 16
Dependent Claim
23 words
Apparatus as defined in claim 12, wherein said movable portions are interengaged with one another and are slidable with respect to one another.
Claim 17
Dependent Claim
36 words
Apparatus as defined in claim 13, including spring means connected between adjacent ones of said movable portions of the ring means for normally spring loading said movable portions in one direction with respect to one another.
Claim 18
Dependent Claim
197 words
A liquid storage tank having a side wall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced from the wall of the tank to define an annular space therebetween, a seal for said roof in association with said annular space comprising an annular flexible band connected and sealed at an upper portion thereof to said roof and spaced from said roof at the lower portion thereof, an annular ring means carried by said roof and supported in spaced relationship to said roof, the lower portion of said flexible band connected to said annular ring means, said annular flexible band sealing said roof and defining a space therebeneath in open communication with the stored liquid so that gas pressure between the roof and the band urges the band outwardly; and support means connected at one end to said roof adjacent said upper portion of said band and connected at the other end to said ring means for supporting the ring means from the roof, said support means disposed in the space beneath said band.
Claim 19
Dependent Claim
197 words
A liquid storage tank having a side wall and a bottom, a floating roof in the tank for support on liquid stored in the tank and adapted to rise and fall with the liquid level in the tank, said roof spaced from the wall of the tank to define an annular space therebetween, a seal for said roof in association with said annular space comprising an annular flexible band connected and sealed at an upper portion thereof to said roof and spaced from said roof at the lower portion thereof, an annular ring means carried by said roof and supported in spaced relationship to said roof, the lower portion of said flexible band connected to said annular ring means, said annular flexible band sealing said roof and defining a space therebeneath in open communication with the stored liquid so that gas pressure between the roof and the band urges the band outwardly; and support means connected at one end to said roof adjacent said upper portion of said band and connected at the other end to said ring means for supporting the ring means from the roof, said support means disposed in the space beneath said band.
References Cited (Backward Citations)
US3204809A
Cited
US3325041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |