US4944238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-submerged ship
Assignee: Individual
•
Filing: 1989-12-06
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Granted: 1990-07-31
•
Expires: 2009-12-06
Abstract
Abstract A semi-submerged ship which has twin, parallel submerged lower hulls spaced apart at least two hull widths, a strut structure extending upwardly from the hulls on each side of the ship, and a cross-structure connected between the upper regions of the strut structure to connect the opposite sides of the ship together. The strut structure on each side consists of at least two spaced lower struts extending upwardly from the hull on that side, and a single, full length upper strut attached to the upper ends of the lower struts, the upper struts lying above the design water line at rest.
Inventors
- 👤 Thomas G. Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:17
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B1/00; B63B1/02; B63B1/10; B63B1/107
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
183 words
A semi-submerged ship, comprising: a pair of parallel submerged hulls whose centers are spaced apart by at least two hull widths; a strut structure extending upwardly from the hulls on each side of the ship; a cross-structure connected across the upper regions of the strut structure to connect the opposite sides of the ship together; the strut structure on each side comprising two lower struts extending upwardly from the hull on that side and a single, full length upper strut attached to the upper ends of the lower struts, each upper strut having a transverse width at its upper end which is no narrower than the width of the remainder of the upper strut, the upper struts lying above the operational design water line at least in the region midway between the lower struts; the lowermost portion of each upper strut in the region midway between the lower struts being no lower than the lowermost portion of the upper strut lying directly above the forward lower strut; and each hull having an enlarged cross-section which extends into the region between the lower struts.
Claim 2
Dependent Claim
183 words
A semi-submerged ship, comprising: a pair of parallel submerged hulls whose centers are spaced apart by at least two hull widths; a strut structure extending upwardly from the hulls on each side of the ship; a cross-structure connected across the upper regions of the strut structure to connect the opposite sides of the ship together; the strut structure on each side comprising two lower struts extending upwardly from the hull on that side and a single, full length upper strut attached to the upper ends of the lower struts, each upper strut having a transverse width at its upper end which is no narrower than the width of the remainder of the upper strut, the upper struts lying above the operational design water line at least in the region midway between the lower struts; the lowermost portion of each upper strut in the region midway between the lower struts being no lower than the lowermost portion of the upper strut lying directly above the forward lower strut; and each hull having an enlarged cross-section which extends into the region between the lower struts.
Claim 3
Dependent Claim
28 words
The ship as claimed in claim 1, wherein the lowermost portion of each upper strut lies in a region directly above at least one of said lower struts.
Claim 4
Dependent Claim
18 words
The ship as claimed in claim 1, wherein engines are mounted in the enlarged cross-sections of the hulls.
Claim 5
Dependent Claim
13 words
The ship as claimed in claim 1, wherein the hulls have bulbous bows.
Claim 6
Dependent Claim
33 words
The ship as claimed in claim 1, wherein the upper and lower struts comprise an integral structure, and cross-beams extend across the cross-structure to connect the upper regions of the strut structure together.
Claim 7
Dependent Claim
17 words
The ship as claimed in claim 5, wherein at least some of the cross-beams comprise box beams.
Claim 8
Dependent Claim
27 words
The ship as claimed in claim 5, wherein the lower strut structure extends through the upper strut and through the cross-structure to form fore and aft cross-beams.
Claim 9
Dependent Claim
32 words
The ship as claimed in claim 1, including resilient joint means having greater resiliency than a standard welded or other rigid joint for resiliently mounting the cross structure to the upper struts.
Claim 10
Dependent Claim
20 words
The ship as claimed in claim 8, wherein the cross-structure is mounted above the upper ends of the upper struts.
Claim 11
Dependent Claim
16 words
The ship as claimed in claim 1, wherein the lower struts are tapered upwardly and outwardly.
Claim 12
Dependent Claim
19 words
The ship as claimed in claim 1, wherein the lower struts are of increasing length in an upward direction.
Claim 13
Dependent Claim
16 words
The ship as claimed in claim 1, wherein the upper struts are tapered upwardly and outwardly.
Claim 14
Dependent Claim
18 words
The ship as claimed in claim 1, wherein the upper struts are canted inwardly in an upwards direction.
Claim 15
Dependent Claim
20 words
The ship as claimed in claim 1, wherein the upper and lower struts are canted inwardly in an upwards direction.
Claim 16
Dependent Claim
28 words
The ship as claimed in claim 1, wherein the upper struts have upper portions which are canted inwardly in an upwards direction and lower portions which extend vertically.
Claim 17
Dependent Claim
38 words
The ship as claimed in claim 1, including internal connecting means at the junction between the upper and lower struts, the connecting means including structural plates extending transversely across the strut structure at the junction between the struts.
Claim 18
Dependent Claim
18 words
The ship as claimed in claim 1, wherein the upper struts have a generally V-shaped vertical transverse cross-section.
Claim 19
Dependent Claim
38 words
The ship as claimed in claim 17, wherein the lower end of said V-shape comprises a second, intersecting V-shape of shallower angle than the remainder of the V-shape in the region between the fore and aft lower struts.
Claim 20
Dependent Claim
23 words
The ship as claimed in claim 17, wherein the lower end of the V-shape is truncated between the fore and aft lower struts.
Claim 21
Dependent Claim
18 words
The ship as claimed in claim 1, wherein the upper struts have a generally rectangular vertical transverse cross-section.
Claim 22
Dependent Claim
27 words
The ship as claimed in claim 1, wherein the upper struts have an upper portion of rectangular vertical cross-section and a lower portion of V-shaped vertical cross-section.
Claim 23
Dependent Claim
18 words
The ship as claimed in claim 21, wherein the lowermost end of the V-shaped lower portion is truncated.
Claim 24
Dependent Claim
20 words
The ship as claimed in claim 1, wherein each upper strut has a concave portion in its vertical transverse cross-section.
Claim 25
Dependent Claim
24 words
The ship as claimed in claim 1, wherein the maximum transverse thickness of the upper struts is greater than that of the lower struts.
Claim 26
Dependent Claim
36 words
The ship as claimed in claim 1, wherein each lower strut comprises an upper portion and a lower portion, the upper portion of each lower strut having a generally greater chord length than the lower portion.
Claim 27
Dependent Claim
23 words
The ship as claimed in claim 25, wherein the upper portions of the lower struts extend down close to the design water level.
Claim 28
Dependent Claim
20 words
The ship as claimed in claim 25, wherein the upper portions extend down to or below the design water level.
Claim 29
Dependent Claim
23 words
The ship as claimed in claim 1, wherein the upper struts are located below the water level under loads above a predetermined value.
Claim 30
Dependent Claim
15 words
The ship as claimed in claim 1, including spray rails attached to the strut structure.
Claim 31
Dependent Claim
28 words
The ship as claimed in claim 29, wherein the spray rails are inclined downward at a transverse angle of between 0 degrees and 20 degrees to the horizontal.
Claim 32
Dependent Claim
21 words
The ship as claimed in claim 1, wherein the cross-structure has a transverse upward step on its undersurface near the bow.
Claim 33
Dependent Claim
30 words
The ship as claimed in claim 1, including ballast tanks and means for taking in and removing water from the ballast tanks to control the water line location at rest.
Claim 34
Dependent Claim
17 words
The ship as claimed in claim 1, wherein the upper and lower struts are of different shapes.
References Cited (Backward Citations)
DE55565C
Cited
GB1260831A
Cited
US3623444A
Cited
US3897744A
Cited
US3866557A
Cited
US3830178A
Cited
US3842772A
Cited
US3896755A
Cited
US3960100A
Cited
GB1468764A
Cited
US4174671A
Cited
US4440103A
Cited
JPS56167582A
Cited
US4552083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |