Class 114/291 - Stepped hull

Subclass of Class 114 - Ships
Definition: Device wherein the hull is made from a plurality of vertically
No. of patents: 92
Last issue date: 12/07/2010

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Number	Title	Issue Date
7845302	Ventilated flow interrupter stepped hull A boat hull has at least one generally transverse ventilation step formed in at least a part of its bottom planing surface open to the water. The step has a forward edge portion and a water flow interrupter is positioned to project downwardly from the hull forward o...	12/07/2010
7597061	Boat hull with channel forming member and method of manufacture A molded boat hull is provided having a channel forming member extending between a motor mounting transom and an aft riser that forms a step in the bottom portion of the boat hull. The channel forming member has at least one open side and at least an opening in anot...	10/06/2009
7549385	Stepped boat hull with flat pad portions The boat hull includes a bow, a stern and a bottom surface which extends from the bow to the stern. The hull includes a bottom surface with a deep-V shaped portion extending from the bow to a hull point which is aft of the mid-point of the bottom surface, approximat...	06/23/2009
7328668	Hybrid vee-hull / wing-in-ground effect vessel An improved planing hull which incorporates a vee-bow (1) with outboard chines (2) designed to trap air and water between said chines. As the chines (2) extend aft they become wider and deeper (3) in the water. The vee-bow (1) ensu...	02/12/2008
7299764	Boat hull The boat hull includes a hull body having an upper surface and a lower surface. The lower surface of the hull body is divided into a fore portion, a central portion and an aft portion, with a central recess being formed in the central portion and an aft recess being...	11/27/2007
7225752	Power boat with improved hull A power boat having an improved hull including concave aft sections, and which hull is capable of operations at a wide range of speeds with low relative horsepower for vessel weight and improved fuel economy is disclosed. In one exemplary embodiment, the boat is a 3...	06/05/2007
7201111	Boat hulls with planing sections Boat hulls or assemblies have sequences of groups of downward-facing sections such as planing sections. A sequence includes a lowermost group and supplemental groups above it. Each group could, for example, be a pair, and the pairs could be port-starboard symmetrica...	04/10/2007
7185599	Jet drive propulsion system for a pontoon boat A pontoon boat is provided with a jet drive propulsion system in which an impeller is driven by an engine. The jet drive propulsion device is dirigible as a result of the fact that a nozzle of the device is rotatable about a generally vertical steering axis. The jet...	03/06/2007
7093553	Super high speed multi-hull watercraft A watercraft with at least one onboard propulsion engine includes at least two hulls and a wing-like deck structure spanning the two hulls (a floating wing). Port and starboard skirts combine with the deck structure to form port and starboard planing channels. The d...	08/22/2006
7055446	High-Froude hull ship 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 s...	06/06/2006
7040941	Vessel propulsion system The present invention relates to a vessel propulsion system and, more specifically, to a vessel propulsion system with improved efficiency and which leads to reduced wave formation, which comprises a propulsion device immersed at least partially in water and which r...	05/09/2006
7018251	Trim operating wire structure for personal watercraft A trim operating wire is disclosed wherein the length of the pull wire connecting between the push-pull converter and the trim operating lever can be made short, and the push wire can be made long. As a result, even where the pull wire, which is thin and highly flex...	03/28/2006
6994049	Power boat with improved hull A power boat having an improved hull including concave aft sections, and which hull is capable of operations at a wide range of speeds with low relative horsepower for vessel weight and improved fuel economy is disclosed. In one exemplary embodiment, the boat is a 3...	02/07/2006
6983713	Powered watercraft A watercraft with a propulsion engine includes at least one hull having an underside. A dual exhaust system includes a first exhaust conduit defining a first exhaust flow path leading to the underside (e.g., a step in a planing surface on the underside) and a second...	01/10/2006
6966271	Waveless hull A vessel hull that does not create bow, stern, or transverse waves when moving through the water having an exterior surface that has a substantially constant cross-section along the length of the hull, and an interior surface that substantially encloses a flow chann...	11/22/2005
6964240	Hull for high speed water craft 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 sur...	11/15/2005
6925953	Levitation and stabilizing hull system A hull system for boats that includes pairs of longitudinally extending strakes with a cross-section that includes a downwardly extending fin member with an adjacent flat horizontal section to provide running and idle stability. Steps with a projected V-shape pint f...	08/09/2005
6923137	Water sports performance boat hull A water sports performance boat includes a hull having a sharpened angle keel for cutting into the water. Reverse chines are carried on port and starboard sides and extending from a forward portion of the hull to an aft portion for inducing a lifting of the bow at g...	08/02/2005
6868798	Powered watercraft A watercraft includes at least one hull having at least one planing surface, at least one vertical step in the planing surface, and an onboard propulsion engine. An exhaust-venting system is provided for venting exhaust from the onboard propulsion engine at the vert...	03/22/2005
6837176	Vessel transition hull A vessel is provided with a transition hull that hydroplanes the vessel on a water surface at a high speed and displaces the water surface at a low speed. ...	01/04/2005
6782839	Hydrofoil boat A hydrofoil (1) comprises a bottom (23) formed with two front and rear steps (3 and 4), and a strut (31) supporting a submerged hydrofoil (21) arranged between the two steps (3 and 4). The strut (31) can...	08/31/2004
6708642	Tri-sponson boat hull and method of making boat hulls A boat hull having an upper hull section, a pair of spaced apart substantially parallel elongated outer sponsons extending from a forward portion to a stern portion of a bottom of the upper hull section, the outer sponsons and upper hull section defining a tunnel th...	03/23/2004
6675736	Boat having channels formed in its hull A hull of a boat, which is particularly intended for use with a jet pump propulsion system, is provided with two channels formed in the port and starboard surfaces of the hull and displaced from a keel line. Each channel comprises a forward edge that inte...	01/13/2004
6666160	High aspect dynamic lift boat hull An unventilated, stepped hydroplaning boat hull has at least one midship step. Two separated wetted planing surfaces are thereby established--a forward surface just forward of the step and an aft surface just forward of an aft edge of the hull. The angles...	12/23/2003
6634309	Device for reducing the resistance to the advancement of a motorboat on water A device for reducing the resistance to the advancement on water of a motorboat (1), including a keel (2), on the underside of which at least one step (3) is provided; projecting element (6) for increasing the points of separation of the motorboat (1) fro...	10/21/2003
6609472	Stable efficient air lubricated ship Presented is an air lubricated ship that offers improved efficiency and stability over the prior art. Features of the preferred embodiment of the invention include: 1) a submerged bow that is generally proximal in depth to the stem, 2) a hydrofoil at the ...	08/26/2003
6604478	Hull configuration utilizing multiple effects for enhanced speed, range and efficiency A hull configuration for a vessel that utilizes multiple effects to reduce friction between the vessel and the water's surface is provided by the present invention. In various embodiments, a surface effect is employed such that a supporting cushion of air...	08/12/2003
6575106	Air induction system for marine vessel A marine vessel air induction system introduces air into an under-hull cavity bounded by an underside, first and second sides, and fore and aft planing surfaces. An air inlet receives ambient air. A plenum receives air from the inlet. A fore planing surfa...	06/10/2003
6425341	Boat hull A boat hull represented in a high speed attitude relative to a water surface-has a generally monohull section. A forward keel portion is flattened to form a plank-like planing surface having a replaceable shoe including stability extensions. Main bodies o...	07/30/2002
6422168	Sporting water vehicle A watercraft incorporates a vertically elongated displacement hull section to elevate the riders of the watercraft well above the water level when the watercraft is up on plane. During normal low-speed displacement hull-type operation, the elongated displ...	07/23/2002
6415731	Method of controlling the attitude of a boat at high speed through boat hull design and a boat hull A method of controlling the attitude of a boat at high speed through boat hull design involves a first step of forming a pair of high speed steps in the hull of the boat. The pair of high speed steps provide enough surface area to control ride attitude, w...	07/09/2002
6363877	Power boat The power boat includes a bow and a stern, a hull with a longitudinal dimension extending from the bow to the stern, and a platform extending across the stern for enabling boarding of the boat, the platform being located at or slightly above the water sur...	04/02/2002
6332422	Hull modification to minimize porpoising of a boat A hull is described having bow, stern, port and starboard sides. At least one chine extends longitudinally from a first point near the bow to a second point near the stern of the hull. At least one wedge section is disposed along the at least one chine an...	12/25/2001
6260503	Channeled air planing apparatus A channeled air planing apparatus improves low speed performance of boats without adversely affecting high speed performance. The apparatus includes structural elements for channeling air to a transverse step adjacent a running surface. Air channeled to t...	07/17/2001
6250246	Boat hull system A boat hull system for reducing the friction between boats and water. The boat hull system includes a boat with a front and a rear. Towards the front there is a hull with a forward portion that includes a width tapering smaller toward the front and toward...	06/26/2001
6213824	Method for reducing vessel draft An improved method for raising a propeller up into the hull of a marine water craft for the purpose of reducing the likelihood of underwater impact and improving shallow water operation without encountering the high efficiency losses normally associated w...	04/10/2001
6176196	Boat bottom hull design A hull design with a maximally narrowed lower hull comprised of a stepped inboard chine and a concave centerline section resulting in the center of buoyancy and center of gravity preferably being in the same longitudinal position. The narrow lower hull op...	01/23/2001
6138602	Catamaran--V boat hull A boat hull of exceptional performance and stability combines a deep V entry configuration transitioning to a catamaran-like after section to produce the soft water entry that is characteristic of a deep V design together with the lateral stability that i...	10/31/2000
6058873	Hull construction for small watercraft A personal watercraft includes an improved hull design which reduces drag on the watercraft and inhibits porpoising of the watercraft at high speeds, while providing adequate buoyancy when the watercraft is at rest. The watercraft hull includes a pair of ...	05/09/2000
6000357	Boat planing tabs Transitional time through the transplaning speed realm of a high speed sport/utility boat is reduced by narrow, concave planing tabs secured along the inside bottom surface of after-sponsons in alignment with the hull lifting strakes. Such planing tabs or...	12/14/1999

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Class 114/291 - Stepped hull