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US3777691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine elevator
Assignee: Individual
•
Filing: 1972-04-10
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Granted: 1973-12-11
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Expires: 1992-04-10
Abstract
Abstract A marine elevator having a U-shaped, pontoon supported, frame into which a vessel to be lifted is moved and a winch operated cable supported platform mounted for vertical movement within the frame for lifting the vessel clear of the water. Vertical supports carried by the platform support the vessel, when lifted, in an upright position.
Inventors
- 👤 W Beale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:00
CPC Classifications
B; B63; B63C; B63C3/00; B63C3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
A marine elevator apparatus including: a. a U-shaped main frame having spaced side members and a connecting end member, b. pontoons beneath the side and end member of frame for supporting the latter above water, c. a vessel lifting platform disposed between the side members of the main frame for vertical movement, d. vertical posts disposed in fore and aft pairs and secured at lower ends to the platform and extending upwards through and above the side members of the U-shaped frame, e. a winch mounted on the end member of the main frame, f. hoisting cables extending from the winch and connected to the platform operable for lifting and lowering the platform between elevated and lowered positions when the winch is operated, g. supporting means mounted at upper ends of the posts engageable with sides of a vessel to be lifted for supporting the vessel in an upright position when the platform is elevated.
Claim 2
Dependent Claim
155 words
A marine elevator apparatus including: a. a U-shaped main frame having spaced side members and a connecting end member, b. pontoons beneath the side and end member of frame for supporting the latter above water, c. a vessel lifting platform disposed between the side members of the main frame for vertical movement, d. vertical posts disposed in fore and aft pairs and secured at lower ends to the platform and extending upwards through and above the side members of the U-shaped frame, e. a winch mounted on the end member of the main frame, f. hoisting cables extending from the winch and connected to the platform operable for lifting and lowering the platform between elevated and lowered positions when the winch is operated, g. supporting means mounted at upper ends of the posts engageable with sides of a vessel to be lifted for supporting the vessel in an upright position when the platform is elevated.
Claim 3
Dependent Claim
28 words
Marine elevator apparatus as claimed in claim 1 in which the pontoons supporting the end frame member are just awash when the elevator is in an unloaded condition.
Claim 4
Dependent Claim
87 words
Marine elevator apparatus as claimed in claim 1 in which the means for supporting the vessel in an upright position includes: a. a strut extending longitudinally between each pair of fore and aft posts, b. a telescopically extensible and retractable supporting bracket swingably mounted at an upper end of each post, c. a collar mounted on the strut adjacent each post for longitudinal adjustment of the strut, d. angle braces having a hInged connection with each bracket and associated collar to enable angular adjustment of each bracket.
Claim 5
Dependent Claim
64 words
Marine elevator apparatus as claimed in claim 1 including a locking bracket mounted on the platform at each post adapted to extend upwards above the main frame when the platform is raised to a fully elevated position and a rod slidable transversely through each locking bracket for supporting the platform in an elevated condition on the main frame when the cables are slackened off.
Claim 6
Dependent Claim
52 words
Marine elevator apparatus as claimed in claim 1 in which each side member of the main frame is supported by a plurality of longitudinally spaced pontoons, at least one pontoon of each side member being adapted to receive measured amounts of water so as to enable longitudinal trimming of the elevator apparatus.
Claim 7
Dependent Claim
41 words
Marine elevator apparatus as claimed in claim 1 which platform has longitudinally spaced front and rear transverse members at opposite ends of which the posts are secured and a vertical sheave mounted for rotation at each end of said transverse members.
References Cited (Backward Citations)
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |