Class 114/57 - Screw propeller type

Subclass of Class 114 - Ships
Definition: Inventions in the exterior form of vessels propelled by
No. of patents: 30
Last issue date: 10/04/2011

Number	Title	Issue Date
8028636	Stern shape of displacement-type marine vessel A stern shape of a displacement-type marine vessel enables reduction of the hull resistance and prevents propeller cavitation. The displacement-type marine vessel which travels in a velocity range in which the Froude number is smaller than the last hump and the ster...	10/04/2011
7383782	Watercraft The invention relates to a watercraft, particularly a river boat, with a hull for receiving useful devices and with propulsion units for generating a driving force and which are located on the hull. The watercraft according to the invention is characterized in that ...	06/10/2008
7338336	Watercraft hull with adjustable keel A watercraft hull having a pair of laterally spaced propulsion tunnels located on opposite sides of its keel, with said tunnels being open downwardly towards the water, includes a movably mounted keel section located between said propulsion tunnels to prevent water ...	03/04/2008
5711239	Propeller configuration for sinusoidal waterline ships A ship of a displacement type with a pointed bow and a transom stern, a longitudinal length of L, and defining a base plane and a design waterline plane, the ship comprising: approximately sinusoidal waterlines; a surface extending from the transom stern ...	01/27/1998
5141456	Water craft with guide fins A hull for a water vessel which includes an elongated displacement vessel having bow and stern extremities, a major longitudinal and normally horizontal axis, a vertical and normally perpendicular axis, a length of about L along the longitudinal axis, a p...	08/25/1992
5127857	Watercraft propulsion system A propulsion system capable of more efficiently accomplishing all that the prior art propulsion systems can accomplish and additionally providing for maneuvers that had hereto been unavailable with purely stern-driven craft through the use of a first and ...	07/07/1992
5108321	Motor boat with auxiliary motor A motor boat with auxiliary and main motors and having a transom with a pocket or recess constructed and arranged to receive and support an auxiliary outboard motor. The auxiliary motor is connected to a steering control in a helm control center which ste...	04/28/1992
4979455	Control surfaces A control surface design for submerged vehicles. The control surfaces are vably mounted or radially extending support members such that the wake created by the deflection of the control surfaces will not be transmitted to the propeller. The support member...	12/25/1990
4959032	Water craft with guide fins A hull for a water vessel which includes an elongated displacement vessel having bow and stern extremities, a major longitudinal and normally horizontal axis, a transverse and normally perpendicular axis, a length of about L along the longitudinal axis, a...	09/25/1990
4887540	Watercraft propulsion system A propulsion system capable of more efficiently accomplishing all that the prior art propulsion systems can accomplish and additionally providing for manuevers that had hereto been unavailable with purely stern-driven craft through the use of a first and ...	12/19/1989
4843989	Ship's hull for small vessels and high speeds Ship's hull, characterized by the fact that the hull below the construction water line (C.W.L.) consists of a bulb-shaped displacement body extending approximately over the entire length of the ship, which is slim in the forebody, then becomes uniformly t...	07/04/1989
4819576	Hydrofoil - submarine vessel system A high speed vessel system comprises a surface-craft, a sub-craft, a pair of main foils, at least a pair of auxiliary foils, a narrow strut connecting the sub-craft with the surface-craft. The main propeller and main rudder are located at the stern end of...	04/11/1989
4785756	Vessel having propeller arranged on vertical hull center plane A vessel equipped with a single screw comprising a propeller shaft positioned on the vertical hull center plane, an upper deck portion which is substantially symmetrical with respect to the vertical hull center plane, and a stern portion having a longitud...	11/22/1988
4784074	Dual walkway - central boat transom An outboard motor boat having an aft configuration with a new and improved transom configuration that includes a stand alone, upwardly projecting, cantilever shaped central transom portion. The transom configuration also includes a transom mid portion con...	11/15/1988
4781141	Personal water craft with improved hull design Improved jet propelled aquatic vessel (1) with a hull (60) profile which increase water entrainment to the jet pump intake orifice (14) and tends to stabilize the vessel. The vessel has a hull (60) with a lowered center section (13) wherein a concave wate...	11/01/1988
4779551	Vessel having laterally offset propeller A vessel equipped with a single screw, comprising a hull which is symmetrical with regard to a vertical center plane containing the center line of the hull, and a propeller shaft which is positioned laterally offset from the vertical center plane of the h...	10/25/1988
4756265	High speed boat lifting structures A thrust collar is disclosed for mounting around the upper portion of the propeller of an inboard/outboard engine. Each thrust collar supports a horizontal hydrofoil wing extending laterally from the collar. A second, similar wing can be provided on an op...	07/12/1988
4732101	Stern apron for ice breakers The stern apron is constructed as a volume body tapering to a sharp end in streamlined manner towards the stern of the ship and which at its lower outer edges is in each case wider than in the overlying region, so that the ship's resistance and the necess...	03/22/1988
4631036	Stern fin for single-prop ship A ship has a stern provided with a propeller that rotates in a plane about a horizontal midline ship axis perpendicular to this plane to displace the ship horizontally forward and a plurality of fins secured to and extending horizontally from the stern ah...	12/23/1986
4592299	Ship's-vessel's rudder with reduced drag effected factors An upstanding panel-like body is provided including top, bottom and front and rear margins and opposite side surfaces extending between those margins. The opposite side surfaces are generally vertically straight and parallel. The front and rear margins ar...	06/03/1986
4550673	Hull construction for seagoing vessels A seagoing vessel comprises a hull having a forwardly projecting bulb at its bow. The bulb includes an upper periphery oriented substantially horizontally and exposed above the water surface when the vessel is stationary and in a fully loaded condition. A...	11/05/1985
4538537	Ship hull for single-screw vessel, twin-screw vessel with two aftbodies and catamaran An asymmetric aftbody for the hull of a ship having a twisted shape operative to achieve higher efficiency at practically all aftbody block coefficients by improving water flow and adapted to provide a shape wherein the tangential components of the wake a...	09/03/1985
4406630	Fishing boat for use with electrically powered fishing motors A fishing boat for use with a pair of electrically powered fishing motors wherein the boat hull has double end bottom running surfaces and a bottom pod extending below the running surfaces between the bow and the stern of the hull along the center line of...	09/27/1983
4363630	Ship's hull with a helical channel ahead of each propeller and method of establishing the shape of the same A clear annular space is provided around the propeller shaft shroud between the aft end of the helical channel proper and the propeller disc. The helical channel is brought far enough around the shaft shroud root so that the aft end of the web formed wher...	12/14/1982
4359010	Means for decreasing wave resistance on marine vessels A marine vessel has a hull which is provided at the stern part thereof with a propeller. In order to decrease the wave resistance at the stern part of the hull, it is provided with a wave generating member which extends aft beyond the aftermost point of t...	11/16/1982
4174672	Ship's propeller shaft sealing assembly A shaft, and especially a ship's propeller shaft, sealing assembly which comprises a solid housing structure having a central bore for receiving the shaft, the housing structure accommodating two seals spaced axially along the bore and a void chamber betw...	11/20/1979
3991697	Twin-screw vessel A ship construction comprises a symmetrical hull having two screw propellers which are symmetrically arranged in respect to the longitudinal central plane of the hull. A rudder is mounted aft of the screw propellers and preferably in the central plane. Th...	11/16/1976
3991696	Hull of a small-sized ship A hull for a small-sized ship has a planing type bottom and a stern having an area curve substantially the same as that of a displacement type hull, whereby during a low speed travelling period the ship is allowed to be travelled under substantially the s...	11/16/1976
3983829	Ships' stern construction The stern construction has an open channel let in to each side of the hull. The channel merges with the hull at its forward end and terminates in front of the upper part of the propeller disc at its rear end. The lower side of the channel is formed by a d...	10/05/1976
3930456	Ship's afterbody, especially for a full-form ship fitted with more than one propeller With ships fitted with more than one propeller, it has been found that a remarkable increase in a ratio speed/power can be obtained especially in full-form ships, if the under-water portion of the ship's afterbody, at a level corresponding to the top clea...	01/06/1976

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Class 114/57 - Screw propeller type