US3565217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offshore elevator improvements
Assignee: Alaska Elevator Corp
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Filing: 1968-10-10
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Granted: 1971-02-23
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Expires: 1988-10-10
Abstract
Abstract An offshore elevator structure including an elevator lift guidingly raised and lowered by a drive assembly including a system of cables and capable of floating on the water while maintaining the cables in a substantially taut condition.
Inventors
- 👤 Donald L St Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:36
CPC Classifications
B; B63; B63B; B63B27/00; B63B27/16; B63B35/00; B63B35/44; B63B35/4413
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
An elevator assembly for an offshore marine installation in which a fixed upper platform is mounted above the normal water level of a body of water comprising a lower platform, drive means comprising drum means mounted on said upper platform, motor means and clutch means selectively providing a drive connection between said motor means and said drum means, a system of cables connecting said drum means to said lower platform for raising and lowering said lower platform, cable support means fixed below the water level, each of said cables extending between said drum means, said support means, and said lower platform and having both ends connected to said lower platform, whereby when said clutch is engaged said lower platform may be driven up or down and, when said clutch is disengaged and said drum means is permitted to run freely, said lower platform may float on said water with said cables being maintained in a substantially taut condition.
Claim 2
Dependent Claim
158 words
An elevator assembly for an offshore marine installation in which a fixed upper platform is mounted above the normal water level of a body of water comprising a lower platform, drive means comprising drum means mounted on said upper platform, motor means and clutch means selectively providing a drive connection between said motor means and said drum means, a system of cables connecting said drum means to said lower platform for raising and lowering said lower platform, cable support means fixed below the water level, each of said cables extending between said drum means, said support means, and said lower platform and having both ends connected to said lower platform, whereby when said clutch is engaged said lower platform may be driven up or down and, when said clutch is disengaged and said drum means is permitted to run freely, said lower platform may float on said water with said cables being maintained in a substantially taut condition.
Claim 3
Dependent Claim
41 words
In the elevator assembly defined in claim 1, each of said cables having one end fixed to said lower platform, the other end extending therefrom around said drum means and said support means and also being fixed to said lower platform.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |