US3827385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cargo vessel
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
•
Filing: 1972-11-02
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Granted: 1974-08-06
•
Expires: 1992-11-02
Abstract
Abstract A cargo vessel in which the tweendecks are displacable vertically, being lifted to clear the hold for bulk cargo. Ramps are provided which are operable when the tweendecks are lowered to permit passage vehicles through an opening in the upper deck down the ramp to the next lower deck. The ramp is hingedly supported at one end at the upper deck at one end of the opening. The other end of the ramp is slidably supported on the lower deck so that when the lower deck is raised, it raises that end of the ramp into the opening. That end of the ramp is provided with a subramp which has limited pivotal movement relative to the main ramp and a foldable extension at the free end which may be folded back over the subramp.
Inventors
- 👤 H Soma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:44
CPC Classifications
B; B63; B63B; B63B25/00; B63B25/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
Cargo vessel having a series of detachable tweendecks for carrying automobiles characterized in that the each detachable tweendeck is displaceable vertically by lifting and lowering, and including at least one ramp extending from an opening in an upper tweendeck to the next lower tweendeck, the ramp being hinged to the upper tweendeck at one end of the opening, and being slidably supported at the other end of the ramp on the next lower tweendeck whereby said other end of the ramp is automatically displaced into said opening when said lower tweendeck is lifted and is automatically displaced downwardly from said opening when said lower tweendeck is lowered, said ramp having a sub-ramp hinged to said ramp adjacent said other end for limited pivotal movement, the free end of said sub-ramp having rollers slidably supporting the ramp on said lower tweendeck, and an extension pivoted to the free end of the sub-ramp which may be folded out after lowering and folded in prior to lifting said lower tweendeck.
Claim 2
Dependent Claim
167 words
Cargo vessel having a series of detachable tweendecks for carrying automobiles characterized in that the each detachable tweendeck is displaceable vertically by lifting and lowering, and including at least one ramp extending from an opening in an upper tweendeck to the next lower tweendeck, the ramp being hinged to the upper tweendeck at one end of the opening, and being slidably supported at the other end of the ramp on the next lower tweendeck whereby said other end of the ramp is automatically displaced into said opening when said lower tweendeck is lifted and is automatically displaced downwardly from said opening when said lower tweendeck is lowered, said ramp having a sub-ramp hinged to said ramp adjacent said other end for limited pivotal movement, the free end of said sub-ramp having rollers slidably supporting the ramp on said lower tweendeck, and an extension pivoted to the free end of the sub-ramp which may be folded out after lowering and folded in prior to lifting said lower tweendeck.
References Cited (Backward Citations)
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Cited
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US2637453A
Cited
US2979007A
Cited
US3059606A
Cited
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Cited
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |