US3977140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earthquake resistant structure for spherical tanks
Assignee: IHI Corp
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Filing: 1974-05-20
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Granted: 1976-08-31
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Expires: 1994-05-20
Abstract
Abstract A plurality of dampers are arranged and interposed between a spherical tank and its foundation in such a way that when the foundation shakes in case of an earthquake so that the spherical tank vibrates or swings relative to the foundation, the amplitude of the relative vibrations of the spherical tank may be controlled by the dampers.
Inventors
- 👤 Tadashi Matsudaira
- 👤 Masaharu Kunieda
- 👤 Takanori Kimura
- 👤 Shinya Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/12; E; E04; E04H; E04H9/00; E04H9/02; E04H9/021; E04H9/0235
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
An earthquake resistant support for spherical tanks having a plurality of supporting elements interposed between a foundation and the bottom of the tank, a primary support means composed a plurality of legs fixed to the foundation and adapted to support the tank in spaced relation thereto, a secondary support means comprising an inner, cylindrical supporting member attached to the bottom of the tank, an outer cylindrical supporting member spaced from said inner member and fixed to the foundation, brackets attached to the outer surface of the inner supporting member, brackets attached to the inner surface of the outer supporting member, dampening units disposed between the brackets, the ends thereof being attached to the respective brackets and pivotally connected thereto, the brackets including resilient means to cushion shocks caused by displacement of the joint between the dampers and the brackets.
Claim 2
Dependent Claim
139 words
An earthquake resistant support for spherical tanks having a plurality of supporting elements interposed between a foundation and the bottom of the tank, a primary support means composed a plurality of legs fixed to the foundation and adapted to support the tank in spaced relation thereto, a secondary support means comprising an inner, cylindrical supporting member attached to the bottom of the tank, an outer cylindrical supporting member spaced from said inner member and fixed to the foundation, brackets attached to the outer surface of the inner supporting member, brackets attached to the inner surface of the outer supporting member, dampening units disposed between the brackets, the ends thereof being attached to the respective brackets and pivotally connected thereto, the brackets including resilient means to cushion shocks caused by displacement of the joint between the dampers and the brackets.
Claim 3
Dependent Claim
16 words
An earthquake resistant support as defined in claim 1 wherein the dampening units are horizontally disposed.
References Cited (Backward Citations)
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US2417053A
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US3129836A
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US3347002A
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US3767150A
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US3762114A
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US3794277A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |