Having Specific Dimensional Or Speed Ratio (e.g., Froude Number, Etc.) Patents (Class 114/61.26)
  • Patent number: 10414464
    Abstract: The present invention relates to the design of seagoing vessels and can be used for most hull types from slow-moving ships and barges to high-speed ships and boats that are operated up to planing speed, and also for sailing boats. The invention relates to the design of the vessel's forepart and relates to a device that reduces the vessel's wave resistance within a wide speed range, and also reduces or eliminates spray and wave-breaking resistance. The device comprises a body that is fully or partly submerged in a mass of water and positioned at the bow area, the body working in interaction with the hull behind. The body is designed and positioned such that it displaces oncoming water mass in the vertical plane and then leads the water mass that passes on the top surface of the body away from and/or parallel to the bow area, such the hull itself, behind the body, displaces oncoming water masses to the least possible extent. A reduced resistance to forward movement from the vessel is thus obtained.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: September 17, 2019
    Assignee: Rasmussen Maritime Design AS
    Inventor: Roar Johan Moen
  • Publication number: 20130145978
    Abstract: A wakesurfing boat includes a hull. A bottom of the hull defines a W-shape in cross-section, the W-shape including a central inverted V-shaped portion. A ballast system includes a plurality of sets of ballast tanks. The boat has a plurality of modes: a cruising mode with ballast tanks empty, a first portion of the bottom in contact with the water, a stern-down trim ?1; a ballasted static mode with ballast tanks filled with ballast water, the hull displacing more water, a larger portion of the bottom in contact with the water, a bow-down trim ?2; and a dynamic surfing mode with ballast tanks filled with ballast water, an intermediate portion of the bottom in contact with the water, and an intermediate trim ?3. A wake wave, generated in the dynamic surfing mode is larger than a wake wave generated in the cruising mode.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 13, 2013
    Inventors: Albert VIVIANI, Arye Laniado, Joshua Laniado, Yann Le Jeune, Pietro Lagioia
  • Publication number: 20120312216
    Abstract: A vessel (30) comprising a hull (15) having an apparent centre of pitch (23) located at a position between about 10% and 35% of the length of the vessel (10) measured from the aftermost point (17) of the vessel on the design waterline. The hull (15) may be bare, or alternatively may be fitted with a damping system (31) located forwardly to provide damping forces to reduce the vertical motion at the bow and hence the vertical accelerations. In one arrangement, the vessel (10) may comprise a single hull vessel. In another arrangement, the vessel (10) may comprise a multi-hulled vessel.
    Type: Application
    Filed: February 11, 2011
    Publication date: December 13, 2012
    Applicant: Austal Ships PTY LTD.
    Inventor: Neville Anthony Armstrong
  • Publication number: 20120304908
    Abstract: A vessel (10) comprising a hull (15) having a the Longitudinal Centre of Flotation (LCF) at the design load waterline (25) at rest with a value of less than about 35% of the vessel waterline length measured from the aftermost point (19) of the vessel waterline. The design vessel speed at design load waterline is at or above Froude Number of 0.45. The hull (15) has a length-to-beam ratio on the design waterline of greater than about 8.0. The Longitudinal Centre of Buoyancy (LCB) is between about 30% and 45% of the vessel waterline length measured from the aftermost point (19) of the vessel waterline (25). In one arrangement, the vessel (10) may comprise a single hull vessel. In another arrangement, the vessel (10) may comprise a multi-hulled vessel.
    Type: Application
    Filed: February 11, 2011
    Publication date: December 6, 2012
    Applicant: AUSTAL SHIPS PTY LTD
    Inventor: Neville Anthony Armstrong
  • Publication number: 20110162572
    Abstract: A hull (1) for a marine vessel (10) comprising an elongate body (2) that tapers outwardly from a foremost location, the bow (3), and tapers inwardly toward the aft (4) such that the aft (4) of the body (2) is significantly reduced in profile with respect to a point in the hull at which the inward taper commences.
    Type: Application
    Filed: May 22, 2009
    Publication date: July 7, 2011
    Inventors: Kim Chamberlin, Robin Chamberlin, Ark Chamberlin
  • Patent number: 7748335
    Abstract: The hull design for this invention includes a sharp bow, deep V concave shape (“VC”) monohull with a reverse curvature running from a flat straight keel to the upper rail and also encompassing the entire hull length from the bow to the stern. The pointed bow with a bow rudder and a deep flat keel results in a smooth hull for guiding a water column free of a wave and water turbulence to the stern. A mainsail mast and a mizzen shroud slide transversely within limits to promote sail proximity and to achieve increased speed via an improved draft. The mizzen foresail is tacked by moving the mast windward; detaching the mizzen shroud; moving it forward to perform a tacking maneuver, and then moving it aft to a leeward position in relation to the mainsail; and re-attaching the mizzen mast to the moveable traveler.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: July 6, 2010
    Inventor: Thomas W. Carne
  • Publication number: 20090158989
    Abstract: A ship designed for use at high speed and heavy seas having a single long and slender hull with a narrow beam and a more or less vertical bow, whereby the front half of the hull has more or less vertical sides, minimal flare in the bow sections and towards the bow an increase in draught at its center line combined with a more or less similar increase of freeboard and whereby the aft end of the hull has a flat or slightly V-shaped bottom with one or more propellers and/or waterjets as propulsion means. In accordance with the invention the bow has a fillet radius of at least 1% of the beam.
    Type: Application
    Filed: December 30, 2008
    Publication date: June 25, 2009
    Inventor: Jan Alexander Keuning
  • Patent number: 7168381
    Abstract: In one aspect of the invention, a vessel has a liquid-plane greater than one meter2/(metric ton)2/3 and includes a hull having a total length and a plurality of hull portions each having a length that is less than the total length. Each hull portion buoys the vessel. Each hull portion also protrudes above the liquid-line and includes a wetted area that does not contact the wetted areas of other hull portions when the boat accelerates through Froude numbers between 0.4 and 0.6. In addition, each hull portion includes a cross-sectional area having a perimeter defined by the edge of the wetted area and having an area defined by a plane that intersects the hull portion at the perimeter. The vessel's liquid-plane is the sum of each hull portion's cross-sectional area divided by the cube root of the square of the weight of the boat is at least one.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: January 30, 2007
    Assignee: Lockhead Martin Corporation
    Inventors: Bruce Cobb, Terrence W. Schmidt
  • Patent number: 7055446
    Abstract: A large-waterplane-area ship operable to efficiently operate at a high-Froude velocity. In one embodiment of the invention, a large-waterplane-area ship includes a hull structure having a plurality of exclusive hull portions protruding from a main body of the hull structure. Each hull portion has a length shorter than the length of the main body and each hull portion has a buoyancy wherein the combined buoyancy of each hull portion is sufficient to support the main body above a waterline. As such, each hull portion acts independently and exclusively of other hull portions with respect to the effects of wave drag. Therefore, the ship overcomes wave drag at lower velocities.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: June 6, 2006
    Assignee: Lockheed Martin Corporation
    Inventors: Bruce W. Cobb, Terrence W. Schmidt
  • Patent number: 6964240
    Abstract: The application relates to water craft hulls having improved hydrodynamic stability. A hull (1) is claimed in which the center of gravity (Cg) is substantially vertically aligned with the center of hydrodynamic lift (Cp) of a lifting surface of the hull, both at lift-off speed and at design speed, and preferably also at speeds below lift-off, and at all speeds between lift-off and design speed and above. A hull having a relatively high aspect ratio at design speed, and preferably also at lift-off speed, is also claimed. In the preferred embodiment, the hull is generally delta-shaped in plan view.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: November 15, 2005
    Assignee: Futuretech Technologies Limited
    Inventor: Ian James Duncan
  • Patent number: 6216622
    Abstract: A high performance boat hull structure is provided which combines a V-hull bottom portion 12 with mid hull sponsons 31 and 33 which form longitudinal tunnels with adjacent structures. The mid hull sponsons 31 and 33 have horizontally disposed running surfaces to provide lift at high speeds. Outer sponsons 14 and 16 incorporate running surfaces 24 and 26 and together with mid hull sponsons 31 and 33 form a second air tunnel and engage and deflect side directed spray and wake downwardly providing additional lift and decreasing or eliminating spray and signature wake. Entrance of injected or inducted air into the air tunnel area decreases frictional engagement of the hull with water to improve efficiency and ride.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: April 17, 2001
    Assignee: N.P.M. Holdings, Inc.
    Inventors: Albert K. Lindstrom, John R. Kirkham