US3811583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for moving and lifting a ship section
Assignee: Individual
•
Filing: 1972-08-07
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Granted: 1974-05-21
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Expires: 1992-08-07
Abstract
Abstract The movement of a section of a ship during assembly or repair is facilitated by cushions of pressurised fluid positioned beneath the section, lateral escape of the fluid being prevented by flexible skirts. When in position the section is raised to a desired height by fluid inflatable lift bags. The fluid may be water, and when working in a dry dock is advantageously sea water.
Inventors
- 👤 A Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:40
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/26; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; B60; B60V; B60V3/00; B60V3/02; B60V3/025; B63; B63C; B63C3/00; B63C3/12; B41M5/1455
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A method of moving a section of a ship into position for assembly and/or repair of a ship in a dry dock comprising the steps of: a. locating a plurality of rails under the ship and laterally of the dock; b. assembling or placing the section on the rails; c. positioning a plurality of flexible skirt pads beneath section and between alternate rails; d. positioning a plurality of lift bags under the ship and between alternate rails not in line with the skirt pads; e. supplying pressurized fluid to the skirt pads by way of flexible supply pipes until the section is wholly supported on pressurized fluid cushions; f. applying propulsive effort to the section to move it across the dock until it is under the ship and over the lift bags; and g. supplying pressurized fluid to lift bags to raise section into position for assembly or repair.
Claim 2
Independent Claim
149 words
A method of moving a section of a ship into position for assembly and/or repair of a ship in a dry dock comprising the steps of: a. locating a plurality of rails under the ship and laterally of the dock; b. assembling or placing the section on the rails; c. positioning a plurality of flexible skirt pads beneath section and between alternate rails; d. positioning a plurality of lift bags under the ship and between alternate rails not in line with the skirt pads; e. supplying pressurized fluid to the skirt pads by way of flexible supply pipes until the section is wholly supported on pressurized fluid cushions; f. applying propulsive effort to the section to move it across the dock until it is under the ship and over the lift bags; and g. supplying pressurized fluid to lift bags to raise section into position for assembly or repair.
Claim 3
Dependent Claim
30 words
A method of moving a section of a ship into position as claimed in claim 1, wherein the propulsive effort is applied to the section by cable and winch means.
Claim 4
Dependent Claim
45 words
A method of moving a section of a ship as claimed in claim 1, wherein each flexible skirt pad comprises a sheet of flexible material which lies adjacent an underside surface of thE section and has a flexible skirt part depending downwardly from its periphery.
Claim 5
Dependent Claim
20 words
A method of moving a section of a ship as claimed in claim 1, wherein the pressurized fluid is air.
Claim 6
Dependent Claim
20 words
A method of moving a section of a ship as claimed in claim 1, wherein the pressurized fluid is water.
Claim 7
Dependent Claim
30 words
A method of moving a section of a ship as claimed in claim 5, wherein the pressurized fluid is sea water using the dynamic head available in a dry dock.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |