Class 114/62 - Concave bottom

Subclass of Class 114 - Ships
Definition: Forms of hull presenting a more or less concave surface
No. of patents: 21
Last issue date: 04/15/2008

Number	Title	Issue Date
7357091	Rapid self-repairing and unsinkable watercraft A self-repairing and unsinkable watercraft has the hull of the mid section of the craft covered by two moveable water impermeable sheaths. The sheaths rotate in opposite directions to temporarily seal a breach and to allow for better ease of permanent repair or repl...	04/15/2008
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
7040573	Landplane to flying boat conversion An aerodynamically efficient fiberglass hull consisting of a pointed bow, a step amidships, and aft section coming to a point which will be attached to the hull of land aircraft and convert them to water operations. In addition, one wing float will be securely attac...	05/09/2006
7029340	Regenerative surfing Regenerative surfing is utilizing a controllable regenerative braking system to regulate speed while surfing. A vertical sculling hydrofoil boat, utilizes the regenerative braking system and includes a vertical sculling drive system for both propulsion and regenerat...	04/18/2006
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
6345584	Hull for shipping with a mono-three-catamaran architecture A hull for shipping with a mono-three-catamaran architecture comprises a bow point (11) connected to hull sides (14, 15) that ends at a stern (12); a pair of chines (17, 18) disposed laterally to a center line (X--X), a keel (13) extending along the cente...	02/12/2002
6210242	Pedal-powered watercraft A pedal-powered watercraft comprises a unitary hull having an upper wall extending from a bow portion to a stern portion of the watercraft and a pair of spaced hollow sponsons located on either side of the upper wall. The upper wall together with inner wa...	04/03/2001
5718184	Hydro-lift boat hull A new Hydro-Lift Boat Hull for offering greater stability and higher speeds. The inventive device includes a keel portion having a keel channel provided therein, a pair of opposed chines positioned on opposite sides of the keel portion, a pair of angled p...	02/17/1998
5582123	Multiple concavity surfing ship and transition system The Multiple Concavity Surfing Ship and Transition System is an improvement for a surfing ship that generates a singular water wave and rides on its crest efficiently at high speeds. The improved system now adds provisions to aid in the ship's transition ...	12/10/1996
5497722	Keelless concave hull A boat hull constructed with an inverted U-shaped hull bottom, hull sides which are vertical below the at-rest water line and outwardly curved in a deep arc above the at-rest water line, and a rudderless, arcuate concave tunnel from bow to stern is disclo...	03/12/1996
5427048	Multi-concave hydrodynamically designed hull The present invention relates to a hydrodynamically designed concave hull having longitudinally positioned chined rails at the outermost edges of the concave scoops. Each pair of concave scoops have a central longitudinally positioned median V-shaped groo...	06/27/1995
5402743	Deep chine hull design There is disclosed an inverted bottom structure having generally convex, longitudinal buttock and waterlines lines which creates a venturi structure and a variable pressure/suction situation along the boat hull bottom. The under sides of the boat hull are...	04/04/1995
5398628	Surfing ship transition system A surfing ship that generates a singular water wave and rides on its crest efficiently at high speeds. Two complementary features to assist in the transition from displacement mode to high speed surfing mode comprise a pair of hydrofoils on either side of...	03/21/1995
4936237	Dual boat hull A boat with dual hulls is constructed of outwardly concave cylindrical hull plates that are substantially free of compound curvature. The respective hull portions may be closed at their ends by outwardly concave cylindrical bow and stern plates....	06/26/1990
4922844	Sailing-boat hull A sailing-boat hull includes a bottom (C) provided with a projecting keel (12) of U-shaped cross-section which is connected laterally to the sides (F) by two longitudinal channels (14) of rounded section so as to define, with the sides (F), two longitudin...	05/08/1990
4760810	Hull for small watercraft A hull configuration for a watercraft that improves stability in straight ahead running without significantly increasing the resistance to forward movement. The hull is comprised of a generally flat center section that is surrounded on each longitudinal s...	08/02/1988
4574724	Boat-hull construction A tunnel-type boat-hull construction is operative with substantially reduced frictional resistance in the water and also with improved high-speed stability. An air-withdrawal port is provided in the bow portion of the tunnel, and exit ports which are inte...	03/11/1986
4509927	Bottom exhaust high speed boat A bottom exhaust type high speed boat has a hull including a grooved bottom. The engine exhaust pipe extends into a midportion of the grooved bottom. A duct fixed to the surface of the hull extends between the opening of the exhaust pipe and the front of ...	04/09/1985
4193369	High speed boat hull A boat hull has a bottom formed with a modified V-shaped longitudinal surface forming the keel and has a tunnel surface disposed on each side of the keel. Both tunnel surfaces have substantially vertical and parallel side surfaces connected by a substanti...	03/18/1980
4192248	Scooped boat hull having tri-keel surfaces A boat hull having a bow and stern and requiring relatively small draft, having low frictional drag characteristics for high speed, stable performance, wherein the hull has a scooped configuration and defines a tri-keel design, wherein the side and bottom...	03/11/1980
4003327	Monolithic ship's body of steel concrete or prestressed concrete A monolithic ship's body is formed of a hull containing bulkhead partitions disposed in a hexagonal arrangement to form a grid symmetrical about the longitudinal axis of the hull. The partitions are formed integrally with the hull. The junction between th...	01/18/1977

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Class 114/62 - Concave bottom