Class / Patent application number | Description | Number of patent applications / Date published |
440066000 | Having means to control flow around propeller | 25 |
20090124145 | Marine Drive System with Partially Submerged Propeller - A marine drive system ( | 05-14-2009 |
20100136859 | WATER FLOW LIMITING SYSTEM FOR A BOAT INCLUDING A WATER FLOW LIMITING PLANE POSITIONED RELATIVE TO PROPELLER SHAFT AND PROPELLER OF A BOAT FOR LIMITING WATER FLOW TO THE PROPELLER - A water flow limiting system for a boat with a propeller shaft and a propeller including a water flow limiting plane and a mechanism. The water flow limiting plane is provided for positioning below the propeller shaft and forward of the propeller for limiting water flow to the propeller. The mechanism is provided for steering the water flow limiting plane relative to the boat. If the propeller shaft is steerable relative to the boat, the mechanism may be a mounting mechanism which maintains the flow limiting plane generally aligned with the propeller shaft. The mechanism may be a steering mechanism which steers the flow limiting plane relative to the propeller shaft. A bite ram may be included for controlling vertical displacement of the flow limiting plane relative to the propeller shaft. The mechanism may be a mounting mechanism for mounting the flow limiting plane to a propeller shaft carrier. | 06-03-2010 |
20110053441 | TWIN-SKEG SHIP - Provided is a twin-skeg ship that allows for a further improvement in propulsion performance (propulsion efficiency). A twin-skeg ship ( | 03-03-2011 |
20110070783 | Apparatus For Control of Stator Wakes - The invention as disclosed is an apparatus that controls the wake of stator blades on an underwater vehicle. The apparatus comprises one or more stator blades each with a movable trailing edge that when actuated in a controlled manner produces a periodic flapping motion upstream of a propulsion rotor. The controlled periodic flapping of the trailing edge the fills the stator blade wake enough to overcome the stator blade's own drag and fill its wake deficit. This has the effect of reducing the blade rate tonal noise of the propulsion rotor. | 03-24-2011 |
20130059491 | PRE-NOZZLE FOR A DRIVE SYSTEM OF A WATERCRAFT TO IMPROVE THE ENERGY EFFICIENCY - A drive system for a watercraft has a water inlet opening, a water outlet opening, and a fin system. A propellerless pre-nozzle for the drive system is configured rotationally asymmetrically in order to further improve the drive efficiency. | 03-07-2013 |
20130210295 | Large Outboard Motor for Marine Vessel Application and Related Methods of Making and Operating Same - An outboard motor for a marine vessel application, and related methods of making and operating same, are disclosed herein. In at least one embodiment, the outboard motor includes a horizontal-crankshaft engine in an upper portion of the outboard motor, positioned substantially positioned above a trimming axis of the outboard motor. In at least another embodiment, first, second and third transmission devices are employed to transmit rotational power from the engine to one or more propellers at a lower portion of the outboard motor. In at least a further embodiment, the outboard motor is made to include a rigid interior assembly formed by the engine, multiple transmission devices, and a further structural component. In further embodiments, the outboard motor includes numerous cooling, exhaust, and/or oil system components, as well as other transmission features. | 08-15-2013 |
20140057506 | Marine tunnel thruster - Marine tunnel thruster includes a duct, within which at least a propeller is fitted that is operatively connected to a rotational drive system. The duct is composed of three sections, which include a first central section and two end sections. The first central section has a specific length and a specific diameter, while the two end sections have a specific length and a specific diameter greater than the diameter of the central section. | 02-27-2014 |
20140087608 | PROP SHAFT HOLDER FOR OUTBOARD MOTOR - A prop shaft holder for an outboard motor includes a forward end for engaging a gear casing of the outboard motor and a rearward end axially spaced apart from the forward end. The rearward end includes an inner radial surface for engaging an outer radial surface of a propeller. The prop shaft holder further includes a tapered surface extending from the forward end to the rearward end. The tapered surface includes a surface feature for inducing turbulent flow to water passing thereover. | 03-27-2014 |
20140273673 | ALL-SPEED-RANGE PROPELLER HAVING STERN FINS - An all-speed-range propeller having stern fins comprises an all-speed-range propeller installed on a propelling shaft of a boat, and a plurality of stern fins installed between the all-speed-range propeller and a hull of the boat. When the all-speed-range propeller having stern fins is applied to the oblique boat on which the propelling shaft is disposed obliquely, the stern fins directly guide the water flow toward the all-speed-range propeller, so that the uneven inflow caused by the obliquely-designed propelling shaft can be conquered to promote the operating efficiency of the all-speed-range propeller. | 09-18-2014 |
20190144095 | MARINE PROPULSION UNIT | 05-16-2019 |
440067000 | Nozzle (Kort-Type) | 10 |
20080200081 | Vessel propulsion - The instant invention is a shroud/keel/rudder combination for use on a engine driven marine vessel having a vented tunnel propulsion system. The combination produces acceptable acceleration, minimal loss of speed, resistance to weed entanglement and optimized steering, in both forward and reverse, especially when used with surface piercing propellers. | 08-21-2008 |
20090130927 | Kort nozzle - A Kort nozzle, in particular a Kort nozzle configured rotatable around the rudder axis of a ship, wherein at least one opening is provided in the wall of the Kort nozzle, so that the occurence of recirculations or of swirls is avoided or reduced even with an angular position with respect to a longitudinal axis of the ship and a globally uniform flow pattern is adjusted as far as possible. | 05-21-2009 |
20090176419 | Submersible propulsor unit - A submersible propulsor unit, comprising: a duct defined between a duct hub and a duct wall, the duct having a water inlet and a water outlet, a propeller means rotatably mounted within the duct, and an array of stator vanes extending between the duct hub and the duct wall, wherein the array of stator vanes comprises stator vanes having a first stiffness and stator vanes having a second stiffness. | 07-09-2009 |
20090305584 | SEMI-SUBMERGED PROPELLER PROPULSION SYSTEM OF DISPLACEMENT AND SEMI-DISPLACEMENT CRAFTS - A propulsion system of displacement or semi-displacement ships, includes one or more propellers of semi-submerged type, arranged with a partial immersion of the sole bottom blades and with the top blades emerged, regardless of the state of motion and the trim of the craft. The propulsion system allows, employed power being equal, a higher propulsion efficiency and allows to keep the driveline of the propellers entirely above water level, wherein the semi-submerged propellers are arranged at the transom, the ratio of diameter (D) or sum of diameters (Np×D) of the semi-submerged propellers to craft width (L) at the water line ( | 12-10-2009 |
20100167605 | MULTIPLE VENTURI NOZZLE SYSTEM FOR WATERCRAFT - The present invention is directed to a multiple propeller nozzle Venturi system and assembly consisting of two or more hydrodynamically shaped nozzle rings, axially located around the propeller and connected by the means of a plurality of equally spaced ring connecting fin struts to be used on a wide variety of sizes of watercrafts. By adjusting the conical inclination of one or more of the hydronamically shaped nozzle rings the water passing over is directed into the area of the propeller increasing the thrust pressure, thereby creating a Venturi effect. A skeg shield and a skid plate are incorporated to strengthen, or repair if broken, the lower portion of outboard and inboard-outboard motors. The overall effect of the multiple nozzle Venturi system is to enhance the performance, handling and control of a watercraft so equipped. Multiple nozzle Venturi systems are constructed to be adaptable to all sizes of vessels and all motors found on watercraft. | 07-01-2010 |
20100323566 | KORT NOZZLE - In order to indicate a Kort nozzle configured rotatable around the rudder axis of a ship, for which the occurrence of recirculations or of swirls is avoided or reduced even with an angular position with respect to a longitudinal axis of the ship and a globally uniform flow pattern adjusts as far as possible, at least one opening is provided in each of two central areas of a nozzle ring enveloping a ship's propeller. | 12-23-2010 |
20110111652 | MARINE PRPPELLING SYSTEM - A marine propelling system for a boat includes a guide shell having a guideway for guiding a water flow to pass therethrough; a propelling member having a main body and a propeller; a vortex guide member mounted to an outlet of the main body and extending backward; a horizontally steering ring sleeved onto a peripheral edge of a front section of the vortex guide member, a vertically steering ring sleeved onto a peripheral edge of a rear section of the vortex guide member; and an inverted guide hood mounted to a rear side of the vortex guide member. When the propeller is rotated, a water flow enters through the guideway and is then pressurized by the propeller to become a vortex flow ejected outward for providing the boat with a propulsive force. In this way, marine propelling system can greatly enhance the steering maneuverability and the safety of the boat. | 05-12-2011 |
20110263168 | Gaseous fluid vessel propulsion system - A bow mounted gaseous fluid vessel propulsion system provides for the introduction of gaseous fluids, e.g. ambient air and/or exhaust fluid gas from the vessel's engine, into the enclosure or duct which houses or circumscribes the propeller. Air and other fluid gases are drawn down into the upper section of the enclosure or duct to allow the propeller to operate in a half submerged, or water surface-piercing condition, while the vessel is moving forward through the water. The beneficial effects of water surface-piercing propeller operation is thereby obtained within a self-contained unit which continually maintains the top of the propeller out of the water during normal forward vessel operation. | 10-27-2011 |
20120015568 | Boat Hull Construction - A boat including a propeller tunnel portion formed in a hull of the boat in which a propeller rotates on an output shaft that extends from the propeller tunnel. A protrusion having a curved portion terminates in a tip portion. The protrusion extends from the propeller tunnel portion and the tip portion terminates near the aft plane of the propeller. The placement of the protrusion in the propeller tunnel portion can be shown to improve propulsion efficiency. | 01-19-2012 |
20120196494 | POWERED WATER SPORTS BOARD - The invention provides a powered water sports board ( | 08-02-2012 |
440068000 | Hull channel | 5 |
20130040514 | THRUSTER UNIT AND METHOD FOR INSTALLATION OF A THRUSTER UNIT - In a thruster for a vessel including a hull, the thruster comprises at least one tunnel element and at least one thruster unit. The tunnel element includes at least a part of a through tunnel in the hull when arranged in the hull. The at least one thruster unit and the at least one tunnel element include cooperating fastening devices for detachably fixing the at least one thruster unit in the at least one tunnel element such that the at least one thruster unit is configured to be passed through the tunnel and mounted to the at least one tunnel element, or demounted from the at least one tunnel element and passed out of the tunnel. A method for mounting and demounting a thruster in a tunnel element includes a tunnel element arranged in the vessel of a hull. | 02-14-2013 |
20150064997 | Boat Hull Construction - A boat comprising a propeller tunnel formed in a hull. The tunnel has a forward end and a rearward end. The rearward end defines a shaped upper surface transverse to a longitudinal axis of the propeller tunnel. An output shaft extends from the propeller tunnel. A propeller is provided that rotates on the output shaft and comprises a plurality of blades defining: outer diameter and radius dimensions, a forward plane perpendicular to the output shaft and defined by a forward-most extension of said blades, and an aft plane perpendicular to the output shaft and defined by an aft-most extension of the blades. A protrusion is provided aft of the propeller and inwardly extending from the propeller tunnel. The protrusion defines a curved portion that terminates in a tip portion, wherein a longitudinal distance between the tip portion and the aft plane is less than the outer diameter dimension. | 03-05-2015 |
20150367922 | WATERCRAFT COMPRISING A REDUNDANT ENERGY ACCUMULATOR - A watercraft with a hull has a flow channel, or is associated with a flow channel, a motor-driven water-acceleration arrangement is associated with the flow channel and the motor is connected to an energy accumulator. In order to improve user convenience, two energy accumulators are integrated into the hull. The energy accumulators are arranged on both sides of the center longitudinal plane running in the longitudinal direction of the hull. | 12-24-2015 |
440069000 | With open bottom | 2 |
20080214067 | Surface piercing propeller tunnel - An improved tunnel configuration for tunnel mounted surface piercing propellers. The improved tunnel configuration provides a flooding suction to the tunnel to allow flooded propeller operation at speeds below planning. The tunnel is stepped whereby an upper portion of the tunnel is sized to allow the propeller to draw air at high speeds. The lower portion of the tunnel is sized to allow the propeller to be flooded resulting in smooth acceleration, improved handling in forward and reverse and a reduction of the transition period. | 09-04-2008 |
20090264031 | Shallow Water Boat - A shallow water boat is shown that operates well in both shallow water and deep water. A tunnel is provided along a centerline of a flat bottom, which tunnel starts near amidships increases in depth and terminates at the aft of the shallow water boat. A top of the tunnel has an S curve therein. A front end of the tunnel connects through a series of angled holes into a plenum via a conduit to atmosphere above the maximum water line of the shallow water boat. During shallow water operation, the motor is raised and the conduit is plugged so water flows through the tunnel to the propeller for the motor. During deep water operation, the motor is lowered and the conduit unplugged so that water does not flow through the tunnel. | 10-22-2009 |