Patent US5694878A successfully refreshed from Google Patents.
US5694878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-submerged catamaran
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
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Filing: 1995-02-17
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Granted: 1997-12-09
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Expires: 2015-02-17
Abstract
Abstract In a semi-submerged catamaran comprising at least two submerged bodies, struts mounted in a standing position on respective submerged bodies and a hull part supported by the struts above the water surface, motion preventing fins are fixed in a submerged part on the bow side and/or in a submerged part on the stern side of the catamaran.
Inventors
- 👤 Kazuo Masuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B1/00; B63B1/02; B63B1/10; B63B1/107; B63B2039/065; B63B2039/067
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
136 words
A semi-submerged catamaran comprising at least two submerged bodies, at least two struts, each strut being mounted in a standing position on one of said submerged bodies, a hull part supported by the struts above the water surface, stabilizing fins on a lateral inner part of each of said at least two submerged bodies at abow side and at a stern side of said at least two submerged bodies, and motion preventing fins fixed on at least a bow portion of said submerged bodies of the catamaran, each of said motion preventing fins fixed on the bow portion being a flat plate provided on the body in a horizontal position at which the body has a maximum horizontal width at the bow side, said flat plate extending forwardly of the bow side of the submerged body.
Claim 2
Dependent Claim
136 words
A semi-submerged catamaran comprising at least two submerged bodies, at least two struts, each strut being mounted in a standing position on one of said submerged bodies, a hull part supported by the struts above the water surface, stabilizing fins on a lateral inner part of each of said at least two submerged bodies at abow side and at a stern side of said at least two submerged bodies, and motion preventing fins fixed on at least a bow portion of said submerged bodies of the catamaran, each of said motion preventing fins fixed on the bow portion being a flat plate provided on the body in a horizontal position at which the body has a maximum horizontal width at the bow side, said flat plate extending forwardly of the bow side of the submerged body.
Claim 3
Dependent Claim
27 words
A semi-submerged catamaran as claimed in claim 1, wherein a length of the motion preventing fins is 5 to 20% of a length L of the catamaran.
Claim 4
Dependent Claim
23 words
A semi-submerged catamaran as claimed in claim 1, wherein the motion preventing fins have a width w which is 10 to 1000 mm.
Claim 5
Dependent Claim
27 words
A semi-submerged catamaran as claimed in claim 2, wherein said length of the motion preventing fins is 7 to 15% of a length L of the catamaran.
Claim 6
Dependent Claim
17 words
A semi-submerged catamaran as claimed in claim 3, wherein said width w is 100 to 500 mm.
Claim 7
Dependent Claim
56 words
A semi-submerged catamaran as claimed in claim 1, further comprising additional motion preventing fins fixed on a stern portion of the struts, each of said additional motion preventing fins being a flat plate fixed horizontally to an underside of a stern portion of the strut located above a screw propeller and a rudder of the catamaran.
Claim 8
Dependent Claim
128 words
A semi-submerged catamaran comprising at least two submerged bodies, at least two struts, each strut being mounted in a standing position on one of said submerged bodies, a hull part supported by the struts above the water surface, stabilizing fins on a lateral inner part of each of said at least two submerged bodies at a bow side and at a stern side of said at least two submerged bodies, and motion preventing fins fixed on at least a stern portion of said submerged bodies of the catamaran, each of said motion preventing fins fixed on said stern portion of the submerged bodies being a flat plate provided on the body in a horizontal position at which the body has a maximum horizontal width at the stern side.
Claim 9
Dependent Claim
128 words
A semi-submerged catamaran comprising at least two submerged bodies, at least two struts, each strut being mounted in a standing position on one of said submerged bodies, a hull part supported by the struts above the water surface, stabilizing fins on a lateral inner part of each of said at least two submerged bodies at a bow side and at a stern side of said at least two submerged bodies, and motion preventing fins fixed on at least a stern portion of said submerged bodies of the catamaran, each of said motion preventing fins fixed on said stern portion of the submerged bodies being a flat plate provided on the body in a horizontal position at which the body has a maximum horizontal width at the stern side.
Claim 10
Dependent Claim
27 words
A semi-submerged catamaran as claimed in claim 7, wherein a length of the motion preventing fins is 5 to 20% of a length L of the catamaran.
Claim 11
Dependent Claim
27 words
A semi-submerged catamaran as claimed in claim 8, wherein said length of the motion preventing fins is 7 to 15% of a length L of the catamaran.
Claim 12
Dependent Claim
23 words
A semi-submerged catamaran as claimed in claim 7, wherein the motion preventing fins have a width w which is 10 to 1000 mm.
Claim 13
Dependent Claim
17 words
A semi-submerged catamaran as claimed in claim 10, wherein said width w is 100 to 500 mm.
Claim 14
Dependent Claim
150 words
A semi-submerged catamaran comprising at least two submerged bodies, at least two struts, each strut being mounted in a standing position on one of said submerged bodies, a hull part supported by the struts above the water surface, stabilizing fins on a lateral inner part of each of said at least two submerged bodies at a bow side and at a stern side of said at least two submerged bodies, and motion preventing fins fixed on a submerged part on the bow side and a submerged part on the stern side of the catamaran, each of said motion preventing fins that are fixed on the bow side of the submerged part being a flat plate provided on the body in a horizontal position at which the submerged body has a maximum horizontal width at the bow side, said flat plate extending forwardly of the bow side of the submerged body.
Claim 15
Dependent Claim
150 words
A semi-submerged catamaran comprising at least two submerged bodies, at least two struts, each strut being mounted in a standing position on one of said submerged bodies, a hull part supported by the struts above the water surface, stabilizing fins on a lateral inner part of each of said at least two submerged bodies at a bow side and at a stern side of said at least two submerged bodies, and motion preventing fins fixed on a submerged part on the bow side and a submerged part on the stern side of the catamaran, each of said motion preventing fins that are fixed on the bow side of the submerged part being a flat plate provided on the body in a horizontal position at which the submerged body has a maximum horizontal width at the bow side, said flat plate extending forwardly of the bow side of the submerged body.
Claim 16
Dependent Claim
49 words
A semi-submerged catamaran as claimed in claim 12, wherein each of said motion preventing fins that are fixed on the stern side of the submerged part is a flat plate provided in a horizontal position at which the submerged body has a maximum horizontal width at the stern side.
Claim 17
Dependent Claim
27 words
A semi-submerged catamaran as claimed in claim 12 wherein a length of the motion preventing fins is 5 to 20% of a length L of the catamaran.
Claim 18
Dependent Claim
23 words
A semi-submerged catamaran as claimed in claim 12 wherein the motion preventing fins have a width w which is 10 to 1000 mm.
Claim 19
Dependent Claim
27 words
A semi-submerged catamaran as claimed in claim 14, wherein said length of the motion preventing fins is 7 to 15% of a length L of the catamaran.
Claim 20
Dependent Claim
17 words
A semi-submerged catamaran as claimed in claim 15, wherein said width w is 100 to 500 mm.
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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) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |