EP0051073A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catamaran type boat
Assignee: Abeking & Rasmussen Schiffs- und Yachtwerft (gmbh & Co)
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Filing: 1980-10-24
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Granted: —
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Expires: 2000-10-24
Abstract
Abstract A boat has two hulls (12,14) defining a tunnel between them. The tunnel is defined by substantially straight side walls (12.1, 14.1) of the hulls at least below the water line. Below the water line this tunnel is bridged by at least one hydrofoil section.
Inventors
- 👤 Karl Günther Wilhelm Dr. Hoppe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:39
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/10; B63B1/12; B63B1/16; B63B1/24
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
110 words
A catamaran type boat having two hulls, each hull having a side wall facing towards a corresponding side wall of the other hull, the two hulls defining a gap in the form of a tunnel between them, characterized in that at least one hydrofoil section (20) is provided between the two hulls (12, 14) and extends between them across at least part of said tunnel, the tunnel being defined by substantially straight side walls of the hulls at least below the water line, and further characterized in the provision of attachment means for attaching the hydrofoil section to the hulls in a position below the water line of the hulls.
Claim 2
Dependent Claim
110 words
A catamaran type boat having two hulls, each hull having a side wall facing towards a corresponding side wall of the other hull, the two hulls defining a gap in the form of a tunnel between them, characterized in that at least one hydrofoil section (20) is provided between the two hulls (12, 14) and extends between them across at least part of said tunnel, the tunnel being defined by substantially straight side walls of the hulls at least below the water line, and further characterized in the provision of attachment means for attaching the hydrofoil section to the hulls in a position below the water line of the hulls.
Claim 3
Dependent Claim
24 words
A boat as claimed in claim 1, characterized in that said hulls have an asymmetrical form and a common plane of symmetry between them.
Claim 4
Dependent Claim
34 words
A boat as claimed in claim 1 or 2, characterized in that the ceiling of the tunnel is partly or fully submerged when floating at rest and is free of water contact at speed.
Claim 5
Dependent Claim
24 words
A boat with two hulls as claimed in claims 1 - 3, in which the hulls are in the form of complementary demi- hulls.
Claim 6
Dependent Claim
22 words
A boat as claimed in claims 1 - 4/ in which the hydrofoil section is located near the keel of the hulls.
Claim 7
Dependent Claim
25 words
A boat as claimed in claims 1 - 5, in which the hydrofoil section is continous and extends across the full width of the tunnel.
Claim 8
Dependent Claim
17 words
A boat as claimed in claims 1 - 6, in which the hydrofoil section is curved forwardly.
Claim 9
Dependent Claim
17 words
A boat as claimed in claims 1 - 7, in which the hydrofoil section is curved rearwardly.
Claim 10
Dependent Claim
17 words
A boat-as claimed in claims 1 - 8, in which a number of hydrofoil sections are provided.
Claim 11
Dependent Claim
18 words
A boat as claimed in claim 9, in which the hydrofoil sections are substantially parallel to each other.
Claim 12
Dependent Claim
19 words
A boat as claimed in claims 1 - 10, in which the hulls are stepped to reduce skin friction.
Claim 13
Dependent Claim
19 words
A boat as claimed in claims 1 - 11, in which the hydrofoil section is a subcavitating profile section.
Claim 14
Dependent Claim
19 words
A boat as claimed in claims 1 - 11, in which the hydrofoil section is a supercavitating profile section.
Claim 15
Dependent Claim
20 words
A boat as claimed in claim 9 or 10, characterized in that the hydrofoil sections are arranged above each other.
Claim 16
Dependent Claim
23 words
A boat as claimed in claims 9 or 10, characterized in that the hydrofoil sections are stacked along the length of the tunnel.
Claim 17
Dependent Claim
30 words
A boat as claimed in any of claims 1 - 15, characterized by means for adjusting the angle of attack of at least part of at least one hydrofoil section.
Claim 18
Dependent Claim
30 words
A boat as claimed in any of claims 1 - 16, characterized in that the hydrofoil section or sections are provided near the longitudinal center of gravity of the hulls.
Claim 19
Dependent Claim
23 words
A boat as claimed in claim 11, characterized in that said steps are provided on the under side of the hulls extending upwardly.
Claim 20
Dependent Claim
26 words
A boat as claimed in claim 11 or 18, characterized in that the hydrofoil section or sections are provided on the bow side of the steps.
References Cited (Backward Citations)
DE1531592A1
Cited
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