Class / Patent application number | Description | Number of patent applications / Date published |
114067000 | Antifriction surfaces | 30 |
20080210151 | Aquatic Friction Reducer And Antifouling Paint Enhancer - The present invention pertains to a novel hydrophilic or “water-loving” bottom finish for boats and watercraft composed and based on a non-ablative long-chain polymer, which is semi-permeable, but non-soluble in water. | 09-04-2008 |
20080236473 | METHOD AND APPARATUS FOR CONTROLLING FRICTION BETWEEN A FLUID AND A BODY - A method and apparatus is disclosed wherein nanostructures or microstructures are disposed on a surface of a body (such as a submersible vehicle) that is adapted to move through a fluid, such as water. The nanostructures or microstructures are disposed on the surface in a way such that the contact between the surface and the fluid is reduced and, correspondingly, the friction between the surface and the fluid is reduced. In an illustrative embodiment, the surface is a surface on a submarine or other submersible vehicle (such as a torpedo). Illustratively, electrowetting principles are used to cause the fluid to at least partially penetrate the nanostructures or microstructures on the surface of the body in order to selectively create greater friction in a desired location of the surface. Such penetration may be used, for example, to create drag that alters the direction or speed of travel of the body. | 10-02-2008 |
20110239928 | BOAT THE PLANING BOTTOM OF WHICH IS FITTED WITH SETS OF ROLLERS FOR CONVERSION OF FRICTION INTO DYNAMIC THRUST - Two sets of idle rollers are fixed to the planing bottom of a boat, one set on each side, or to its appendices, for transforming the continuous movement of water against the V-shaped hull, responsible for hindering its forward progress, into a propulsive thrust. This results in faster forward drive, propulsive power being equal. Each set of rollers is housed in a rectangular container placed in a purposely made recess in the stern with the rollers lying perpendicular to the forward direction of the boat. The sets of rollers can be placed separately preferably close to the stern board and to the keel. These rollers are cylindrical or frusto-conical in shape, of any diameter, length and number compatible with the size of the planing bottom of the boat, their surfaces being smooth or suitably grooved to improve thrust, stability and drainage. | 10-06-2011 |
20120255480 | AMPHIPHILIC FOULING RELEASE COATINGS - The present invention provides an amphiphilic polymeric material well-suited as a coating for marine applications, such as use as a fouling-release coating on the external surfaces of ships, particularly ship hulls. Also provided are methods of making the polymeric material and methods for using the polymeric material, as well as articles and surfaces that are coated with the polymeric material. | 10-11-2012 |
20140318433 | WATERBORNE ANTIFOULING COATING COMPOSITION - The invention provides a waterborne antifouling coating composition comprising (i) a binder polymer, (ii) a pigment and (iii) no biocide or a biocide selected from (a) a copper biocide or a copper biocide in combination with at least one or more co-biocide(s), or (b) a copper-free biocide or a copper-free biocidein combination with at least one or more co-biocide(s), with the proviso that the biocide is not a copper biocide in combination with zinc pyrithione, and wherein the pigment volume concentration of the waterborne antifouling coating composition is greater than 80% and less than 95%. | 10-30-2014 |
20080236472 | WIND-POWERED, AIR CUSHIONED ROTATABLE PLATFORM - A wind-powered, fluid cushioned platform adapted to float on a body of liquid. The platform includes a deck having upper and lower surfaces and a lower peripheral member extending around the outer perimeter of the deck. A pump having a pump outlet is supported by the deck. A fill pipe has a first end connected to the pump outlet and a second end in communication with the lower surface of the deck. The pump is adapted to pump a fluid through the fill pipe to a blow tank formed beneath the deck between the surface of the liquid and the deck within the area circumscribed by the lower peripheral member. A plurality of vanes and/or sails are preferably coupled to the deck to catch the wind and use the power of the wind to rotate the floating platform. In one embodiment, apparatus is provided for the purpose of generating electricity as the platform rotates. | 10-02-2008 |
20090260561 | Frictional Resistance Reduction Ship - [Problem Solved] | 10-22-2009 |
20090266288 | Method of reducing frictional resistance between ship body and water by releasing gases in water - A method of reducing frictional resistance between a ship body and water by releasing gases in water includes the steps of: (a) providing a plurality of gas outlets disposed at predetermined positions under a water level of a fore part of a hull of the ship body for releasing the gases; (b) using the effect of gases released vertically upward in the water and along an aslant wall of the hull to partially separate the hull from a water contact surface, so as to lower the average density of water at the contact surface with the hull; (c) selecting the position of releasing the gases according to parameters including the shape of the hull, the velocity, the draft depth and the water temperature, such that the released gases are attached onto the surface of the hull and floated to predetermined positions of the water surface through predetermined flow lines; and (d) using the compressibility of the gases and the gases released in a high pressure zone and a low pressure zone as a buffer layer to reduce the pressure of water to the hull in the high pressure zone and reduce the suction to the hull in the low pressure zone, for simultaneously reducing the pressure and the suction produced during the traveling of the ship body, and the released gases having the same characteristics as described in Step (b). | 10-29-2009 |
20100018452 | Frictional Resistance Reduction Ship And Operation Method - The below waterline region (L.W.L.) is divided into an upper region (R | 01-28-2010 |
20100064959 | SHIP HULL STRUCTURE AND A METHOD OF OPERATING THE SHIP - A ship hull structure includes a main hull and a movable rearbody having an engine and a propeller. The movable rearbody is located at a lower side of a stern of the main hull, connected with an aft of the main hull to form an integral unit by a hinge linking device allowing the rearbody to pivot up and down. By a block, a crane or a winch and through a chain or a hanging wire, a pivoting angle of the movable rearbody with respect to the main hull can be adjusted and controlled. A bottom of the hull can be provided with at least one, usually plural, air cushion recess, which is filled with pressurized air to reduce a viscous force between a bottom of the ship and water. When a ship of this kind of structure is sailing, the rearbody can be lifted up by the block or the winch, allowing part of the propeller to be separated from a water surface to reduce resistance in the water that the engine can achieve a required rotational speed (RPM) in a short time. Next, the rearbody is laid down slowly, allowing the propeller to be put into the water, thereby increasing propulsion and quickly achieving a cruising speed. When the ship is sailing and encounters with wind wave, the stern will ascend by longitudinal pitching; at this time, the rearbody can descend by its own weight, with a hinge axis as a center, preventing the propeller to leave the water surface to rotate idly. On the other hand, when a bow ascends (that is, the stern descends), the rearbody will maintain a normal draught height by buoyancy of the water and the force between the water and running propeller Therefore, for the entire ship, a wetted surface area of the propeller can be adjusted automatically to keep at a best sailing condition, which can further save fuel consumption significantly. In another embodiment that the bottom of the ship is formed with the air cushion recesses, a friction force of the water can be reduced to increase a ship speed by the air cushion effect formed at the bottom of the ship. | 03-18-2010 |
20110000418 | SHIP WITH REDUCED FRICTIONAL RESISTANCE AND ITS OPERATION METHOD - [Object] The present invention provides for a frictional resistance reduction ship able to decrease friction resistance and improve fuel efficiency. | 01-06-2011 |
20110094435 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - A ship-body frictional resistance reducing device for reducing frictional resistance of a sailing ship body | 04-28-2011 |
20110107956 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - In a ship-body frictional resistance reducing device, an ejection chamber ( | 05-12-2011 |
20110168078 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - In a ship-body frictional resistance reducing device for reducing frictional resistance of a sailing ship body | 07-14-2011 |
20110220002 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - A ship-body frictional resistance reducing device for reducing frictional resistance of a sailing ship body by forming an air bubble curtain | 09-15-2011 |
20110239927 | AIR BUBBLE RECOVERY DEVICE OF SHIP - An air ejecting unit is configured to eject air into water from an air ejecting outlet provided in a ship bottom of a ship body. An air recovery device is configured to recover the air into the ship body from first to third air recovery inlets provided in the ship bottom. The first air recovery inlet is provided to cross the center line. The second air recovery inlet is provided to project on a port side from the first air recovery inlet. The third air recovery inlet is provided to project on a starboard side from the first air recovery inlet. The second and third air recovery inlets are arranged on a bow side from the first air recovery inlet. Each of the first to third air recovery inlets includes a plurality of air recovery holes. | 10-06-2011 |
20120055392 | AIR LUBRICATION DEVICE OF SHIP - An air lubrication apparatus of a ship includes an air ejecting unit and a restraining section. The air ejecting unit ejects air from the ship bottom. The restraining section restrains relative reduction of a thickness of an air layer which covers a center line region of the ship bottom. | 03-08-2012 |
20120097089 | FRICTIONAL RESISTANCE REDUCING DEVICE OF SHIP - A gas room is arranged in a hull to cross a longitudinal frame and to extend into a width direction. A scattering member is arranged in the gas room to cross the longitudinal frame and to extend into the width direction. Air blown into the gas room from an air supply pipe hits the scattering member to scatter into the width direction, and is blown from an air blowing hole formed in a bottom of the gas room into water. Because the gas room crosses the longitudinal frame and extends into the width direction, an air bubble flow with a wide width can be formed into the width direction by the single gas room. Therefore, the number of the gas rooms which are necessary to form the air bubble flow which covers the whole width of a ship bottom may be few, and the number of the air supply pipes which are provided every the gas room may be few. | 04-26-2012 |
20120247383 | DEVICE WITH MICROBUBBLE-INDUCED SUPERHYDROPHOBIC SURFACES FOR DRAG REDUCTION AND BIOFOULING PREVENTION AND DEVICE FOR BIOFOULING PREVENTION - A device with microbubble-induced superhydrophobic surfaces for drag reduction and biofouling prevention includes an anodic microporous plate, a cathodic microporous plate, and a DC power supply. The anodic microporous plate and the cathodic microporous plate are mounted to a hull surface of a ship. The DC power supply includes a positive pole electrically connected to the anodic microporous plate and a negative pole electrically connected to the cathodic microporous plate. Seawater is electrolyzed to generate hydrogen microbubbles adjacent to a surface of the cathodic microporous plate and to generate oxygen microbubbles adjacent to a surface of the anodic microporous plate, forming superhydrophobic surfaces on the surfaces of the anodic microporous plate and the cathodic microporous plate. Electric current flows through the anodic microporous plate and the cathodic microporous plate to prevent biofouling. | 10-04-2012 |
20120272891 | Apparatus to Reduce Skin Friction Drag on a Marine Vessel - An apparatus of reducing skin friction drag on a marine hull comprising imparting ultrasonically-induced cavitation at a boundary layer at the hull-water interface. The apparatus includes a sonification plate on at least a portion of a wettable area of the hull to establish a boundary layer interface between the sonification plate and the water medium, and an acoustic generator for energizing the sonification plate to produce microcavitation bubbles at the boundary layer interface whereby to alter the Reynolds number, kinematic viscosity, and coefficient of friction. The sonification plate is hermetically sealed and includes an array of ultrasonic transducers, which may be mounted on an interior or exterior surface of the hull. The energizing nucleates microcavitation bubbles upon entrained gases and/or particulate matter residing in the water medium. | 11-01-2012 |
20130036964 | RUDDER RESISTANCE REDUCING METHOD - The present invention relates to a rudder resistance reducing method which utilizes a negative pressure to guide in gas for generating air bubbles, reducing the resistance of the rubber of a boat. The present invention uses an air bubble generator in front of the rudder for generating bubbles during rotation of the propeller of the boat to cause a high-speed flow of water without changing the original design of the boat, enabling the air bubbles to isolate contact between the high-speed flow of water and the rudder, thereby reducing rudder resistance and saving energy consumption. | 02-14-2013 |
20130098285 | AIR LUBRICATION SYSTEM OF SHIP - It is desired to provide an air lubrication system of an outer installation type with a good efficiency. An air recovering device includes a recovery side chamber provided on a bottom of a ship on a stern side from an air ejecting device which supplies air bubbles to the ship bottom, and comprising air intake holes formed in a portion of the recovery side chamber opposite to the ship bottom through a gap; and a recovering section recovering air inside a recovery side chamber. The air bubbles acquired from the air intake holes are once accumulated inside the recovery side chamber to generate pushing pressure occurs so that air can be smoothly recovered from the recovering section. | 04-25-2013 |
20130139746 | AIR LUBRICATION SYSTEM OF SHIP - A ship air lubrication system of an external installation type with good efficiency is desired to be provided. An air ejecting unit includes an ejecting side chamber installed in a ship bottom of a ship and having air ejecting holes formed in a surface opposite to the ship bottom on a lower side; and a supply section which supplies air into an inner space of the ejecting side chamber. When the air in the ejecting side chamber is ejected from the air ejecting holes, the air is sheared by an external water stream, and small air bubbles are supplied to the ship bottom. | 06-06-2013 |
20130269589 | REDUCING DRAG OF A HULL OF A SHIP - Disclosed is an apparatus for generating bubbles for reducing drag on a hull of a ship, wherein the bubble generating device is attachable to an outer surface of the hull, and wherein the apparatus comprises one or more microfluidic device for controlling a bubble size of the generated bubbles. | 10-17-2013 |
20140230715 | EXCITATION FORCE REDUCING TYPE SHIP - Disclosed is an excitation force reducing type ship. An excitation force reducing type ship according to one embodiment of the present invention comprises: a hull having a rear end with a propeller; and an excitation force reducing module which forms an air layer for generating reflected waves on a surface of the hull neighboring the propeller during an operation of the propeller so as to reduce the excitation force in the direction of the hull, wherein the excitation force reducing module can be arranged eccentrically with respect to a center line penetrating through the center of the axis of rotation of the propeller in a vertical direction of the hull. | 08-21-2014 |
20140238291 | Self-Powered Slip Plate To Reduce Skin-Friction Drag on a Marine Vessel - An anti-friction slip plate for mounting on a hull of a marine vessel to reduce skin friction drag by acoustically generating microcavitation bubbles at a wetted area of the hull. The slip plate comprises a plate-like enclosure, an energy extraction mechanism to extract power from water current flowing along the hull when underway, a power generator driven by the energy extraction mechanism to produce electrical power, an acoustic signal generator powered by the power generator to produce an acoustic signal, and a series of transducers excited by the acoustic signal to effect emission of acoustic waves that produce cavitation bubbles in the wetted area. A bottom surface of the slip plate serves as an acoustic diaphragm to impart cavitation bubbles at the wetted area interface. Optionally, a controller and/or status monitor may be provided to control and/or visual monitoring of power, acoustic frequency, intensity, duty cycle, or other parameters according to a condition of operation of the vessel or a condition of the water medium at the interface. | 08-28-2014 |
20140331912 | APPARATUS USING AN ELECTRO-CATALYTIC COATING TO REDUCE SHIP'S FRICTION AND PREVENT BIOFOULING - An apparatus for friction reduction and biofouling prevention is invented, which consists of an anodic electro-catalytic layer and a cathodic electro-catalytic layer installed on the submerged surface of a carrier. There is an insulating filling between the anodic layer and the cathodic layer. The layered coatings are applied with the use of electric arc spraying technique. A first DC power supply unit is connected to the anodic layer and the cathodic layer. The anodic layer, the cathodic layer, the DC power supply unit, and water together form the conducting path for water electro-catalysis. Hydrogen and oxygen gases are produced to form a thin gas film on the submerged surface to reduce friction and prevent biofouling on the carrier. Alternatively, the apparatus produces hydroxyl radicals to kill marine microorganisms and reduce the risk of biofouling and biocorrosion. | 11-13-2014 |
20160075406 | AIR LUBRICATION SYSTEM - A system for providing an air lubricating layer between a substantially flat bottom ( | 03-17-2016 |
20160185423 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE, SHIP COMPRISING THE DEVICE, AND METHOD OF REDUCING FRICTIONAL RESISTANCE OF SHIP - A device for reducing frictional resistance includes: a chamber which is provided to a draft part of a hull and in which blowing holes blowing out air into the water of the outside of the hull from different positions to each other in a height direction of the hull are formed; a supply pipe supplying the air to an internal space of the chamber; and a distributor provided to each of the blowing holes, and guiding a part of the air, which was supplied inside the chamber from the supply pipe, to each of the blowing holes. The plurality of distributors has a flow-amount adjuster adjusting a flow amount of the air guided to the blowing hole corresponding to each of the distributors so that the flow amount of the air blown out from the plurality of blowing holes is equalized in each of the blowing holes. | 06-30-2016 |
20160251060 | HIGH EFFICIENCY COMPRESSOR AND DISTRIBUTION SYSTEM | 09-01-2016 |
114067000 | Air and oil films | 25 |
20080210151 | Aquatic Friction Reducer And Antifouling Paint Enhancer - The present invention pertains to a novel hydrophilic or “water-loving” bottom finish for boats and watercraft composed and based on a non-ablative long-chain polymer, which is semi-permeable, but non-soluble in water. | 09-04-2008 |
20080236473 | METHOD AND APPARATUS FOR CONTROLLING FRICTION BETWEEN A FLUID AND A BODY - A method and apparatus is disclosed wherein nanostructures or microstructures are disposed on a surface of a body (such as a submersible vehicle) that is adapted to move through a fluid, such as water. The nanostructures or microstructures are disposed on the surface in a way such that the contact between the surface and the fluid is reduced and, correspondingly, the friction between the surface and the fluid is reduced. In an illustrative embodiment, the surface is a surface on a submarine or other submersible vehicle (such as a torpedo). Illustratively, electrowetting principles are used to cause the fluid to at least partially penetrate the nanostructures or microstructures on the surface of the body in order to selectively create greater friction in a desired location of the surface. Such penetration may be used, for example, to create drag that alters the direction or speed of travel of the body. | 10-02-2008 |
20110239928 | BOAT THE PLANING BOTTOM OF WHICH IS FITTED WITH SETS OF ROLLERS FOR CONVERSION OF FRICTION INTO DYNAMIC THRUST - Two sets of idle rollers are fixed to the planing bottom of a boat, one set on each side, or to its appendices, for transforming the continuous movement of water against the V-shaped hull, responsible for hindering its forward progress, into a propulsive thrust. This results in faster forward drive, propulsive power being equal. Each set of rollers is housed in a rectangular container placed in a purposely made recess in the stern with the rollers lying perpendicular to the forward direction of the boat. The sets of rollers can be placed separately preferably close to the stern board and to the keel. These rollers are cylindrical or frusto-conical in shape, of any diameter, length and number compatible with the size of the planing bottom of the boat, their surfaces being smooth or suitably grooved to improve thrust, stability and drainage. | 10-06-2011 |
20120255480 | AMPHIPHILIC FOULING RELEASE COATINGS - The present invention provides an amphiphilic polymeric material well-suited as a coating for marine applications, such as use as a fouling-release coating on the external surfaces of ships, particularly ship hulls. Also provided are methods of making the polymeric material and methods for using the polymeric material, as well as articles and surfaces that are coated with the polymeric material. | 10-11-2012 |
20140318433 | WATERBORNE ANTIFOULING COATING COMPOSITION - The invention provides a waterborne antifouling coating composition comprising (i) a binder polymer, (ii) a pigment and (iii) no biocide or a biocide selected from (a) a copper biocide or a copper biocide in combination with at least one or more co-biocide(s), or (b) a copper-free biocide or a copper-free biocidein combination with at least one or more co-biocide(s), with the proviso that the biocide is not a copper biocide in combination with zinc pyrithione, and wherein the pigment volume concentration of the waterborne antifouling coating composition is greater than 80% and less than 95%. | 10-30-2014 |
20080236472 | WIND-POWERED, AIR CUSHIONED ROTATABLE PLATFORM - A wind-powered, fluid cushioned platform adapted to float on a body of liquid. The platform includes a deck having upper and lower surfaces and a lower peripheral member extending around the outer perimeter of the deck. A pump having a pump outlet is supported by the deck. A fill pipe has a first end connected to the pump outlet and a second end in communication with the lower surface of the deck. The pump is adapted to pump a fluid through the fill pipe to a blow tank formed beneath the deck between the surface of the liquid and the deck within the area circumscribed by the lower peripheral member. A plurality of vanes and/or sails are preferably coupled to the deck to catch the wind and use the power of the wind to rotate the floating platform. In one embodiment, apparatus is provided for the purpose of generating electricity as the platform rotates. | 10-02-2008 |
20090260561 | Frictional Resistance Reduction Ship - [Problem Solved] | 10-22-2009 |
20090266288 | Method of reducing frictional resistance between ship body and water by releasing gases in water - A method of reducing frictional resistance between a ship body and water by releasing gases in water includes the steps of: (a) providing a plurality of gas outlets disposed at predetermined positions under a water level of a fore part of a hull of the ship body for releasing the gases; (b) using the effect of gases released vertically upward in the water and along an aslant wall of the hull to partially separate the hull from a water contact surface, so as to lower the average density of water at the contact surface with the hull; (c) selecting the position of releasing the gases according to parameters including the shape of the hull, the velocity, the draft depth and the water temperature, such that the released gases are attached onto the surface of the hull and floated to predetermined positions of the water surface through predetermined flow lines; and (d) using the compressibility of the gases and the gases released in a high pressure zone and a low pressure zone as a buffer layer to reduce the pressure of water to the hull in the high pressure zone and reduce the suction to the hull in the low pressure zone, for simultaneously reducing the pressure and the suction produced during the traveling of the ship body, and the released gases having the same characteristics as described in Step (b). | 10-29-2009 |
20100018452 | Frictional Resistance Reduction Ship And Operation Method - The below waterline region (L.W.L.) is divided into an upper region (R | 01-28-2010 |
20100064959 | SHIP HULL STRUCTURE AND A METHOD OF OPERATING THE SHIP - A ship hull structure includes a main hull and a movable rearbody having an engine and a propeller. The movable rearbody is located at a lower side of a stern of the main hull, connected with an aft of the main hull to form an integral unit by a hinge linking device allowing the rearbody to pivot up and down. By a block, a crane or a winch and through a chain or a hanging wire, a pivoting angle of the movable rearbody with respect to the main hull can be adjusted and controlled. A bottom of the hull can be provided with at least one, usually plural, air cushion recess, which is filled with pressurized air to reduce a viscous force between a bottom of the ship and water. When a ship of this kind of structure is sailing, the rearbody can be lifted up by the block or the winch, allowing part of the propeller to be separated from a water surface to reduce resistance in the water that the engine can achieve a required rotational speed (RPM) in a short time. Next, the rearbody is laid down slowly, allowing the propeller to be put into the water, thereby increasing propulsion and quickly achieving a cruising speed. When the ship is sailing and encounters with wind wave, the stern will ascend by longitudinal pitching; at this time, the rearbody can descend by its own weight, with a hinge axis as a center, preventing the propeller to leave the water surface to rotate idly. On the other hand, when a bow ascends (that is, the stern descends), the rearbody will maintain a normal draught height by buoyancy of the water and the force between the water and running propeller Therefore, for the entire ship, a wetted surface area of the propeller can be adjusted automatically to keep at a best sailing condition, which can further save fuel consumption significantly. In another embodiment that the bottom of the ship is formed with the air cushion recesses, a friction force of the water can be reduced to increase a ship speed by the air cushion effect formed at the bottom of the ship. | 03-18-2010 |
20110000418 | SHIP WITH REDUCED FRICTIONAL RESISTANCE AND ITS OPERATION METHOD - [Object] The present invention provides for a frictional resistance reduction ship able to decrease friction resistance and improve fuel efficiency. | 01-06-2011 |
20110094435 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - A ship-body frictional resistance reducing device for reducing frictional resistance of a sailing ship body | 04-28-2011 |
20110107956 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - In a ship-body frictional resistance reducing device, an ejection chamber ( | 05-12-2011 |
20110168078 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - In a ship-body frictional resistance reducing device for reducing frictional resistance of a sailing ship body | 07-14-2011 |
20110220002 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE OF SHIP BODY - A ship-body frictional resistance reducing device for reducing frictional resistance of a sailing ship body by forming an air bubble curtain | 09-15-2011 |
20110239927 | AIR BUBBLE RECOVERY DEVICE OF SHIP - An air ejecting unit is configured to eject air into water from an air ejecting outlet provided in a ship bottom of a ship body. An air recovery device is configured to recover the air into the ship body from first to third air recovery inlets provided in the ship bottom. The first air recovery inlet is provided to cross the center line. The second air recovery inlet is provided to project on a port side from the first air recovery inlet. The third air recovery inlet is provided to project on a starboard side from the first air recovery inlet. The second and third air recovery inlets are arranged on a bow side from the first air recovery inlet. Each of the first to third air recovery inlets includes a plurality of air recovery holes. | 10-06-2011 |
20120055392 | AIR LUBRICATION DEVICE OF SHIP - An air lubrication apparatus of a ship includes an air ejecting unit and a restraining section. The air ejecting unit ejects air from the ship bottom. The restraining section restrains relative reduction of a thickness of an air layer which covers a center line region of the ship bottom. | 03-08-2012 |
20120097089 | FRICTIONAL RESISTANCE REDUCING DEVICE OF SHIP - A gas room is arranged in a hull to cross a longitudinal frame and to extend into a width direction. A scattering member is arranged in the gas room to cross the longitudinal frame and to extend into the width direction. Air blown into the gas room from an air supply pipe hits the scattering member to scatter into the width direction, and is blown from an air blowing hole formed in a bottom of the gas room into water. Because the gas room crosses the longitudinal frame and extends into the width direction, an air bubble flow with a wide width can be formed into the width direction by the single gas room. Therefore, the number of the gas rooms which are necessary to form the air bubble flow which covers the whole width of a ship bottom may be few, and the number of the air supply pipes which are provided every the gas room may be few. | 04-26-2012 |
20120247383 | DEVICE WITH MICROBUBBLE-INDUCED SUPERHYDROPHOBIC SURFACES FOR DRAG REDUCTION AND BIOFOULING PREVENTION AND DEVICE FOR BIOFOULING PREVENTION - A device with microbubble-induced superhydrophobic surfaces for drag reduction and biofouling prevention includes an anodic microporous plate, a cathodic microporous plate, and a DC power supply. The anodic microporous plate and the cathodic microporous plate are mounted to a hull surface of a ship. The DC power supply includes a positive pole electrically connected to the anodic microporous plate and a negative pole electrically connected to the cathodic microporous plate. Seawater is electrolyzed to generate hydrogen microbubbles adjacent to a surface of the cathodic microporous plate and to generate oxygen microbubbles adjacent to a surface of the anodic microporous plate, forming superhydrophobic surfaces on the surfaces of the anodic microporous plate and the cathodic microporous plate. Electric current flows through the anodic microporous plate and the cathodic microporous plate to prevent biofouling. | 10-04-2012 |
20120272891 | Apparatus to Reduce Skin Friction Drag on a Marine Vessel - An apparatus of reducing skin friction drag on a marine hull comprising imparting ultrasonically-induced cavitation at a boundary layer at the hull-water interface. The apparatus includes a sonification plate on at least a portion of a wettable area of the hull to establish a boundary layer interface between the sonification plate and the water medium, and an acoustic generator for energizing the sonification plate to produce microcavitation bubbles at the boundary layer interface whereby to alter the Reynolds number, kinematic viscosity, and coefficient of friction. The sonification plate is hermetically sealed and includes an array of ultrasonic transducers, which may be mounted on an interior or exterior surface of the hull. The energizing nucleates microcavitation bubbles upon entrained gases and/or particulate matter residing in the water medium. | 11-01-2012 |
20130036964 | RUDDER RESISTANCE REDUCING METHOD - The present invention relates to a rudder resistance reducing method which utilizes a negative pressure to guide in gas for generating air bubbles, reducing the resistance of the rubber of a boat. The present invention uses an air bubble generator in front of the rudder for generating bubbles during rotation of the propeller of the boat to cause a high-speed flow of water without changing the original design of the boat, enabling the air bubbles to isolate contact between the high-speed flow of water and the rudder, thereby reducing rudder resistance and saving energy consumption. | 02-14-2013 |
20130098285 | AIR LUBRICATION SYSTEM OF SHIP - It is desired to provide an air lubrication system of an outer installation type with a good efficiency. An air recovering device includes a recovery side chamber provided on a bottom of a ship on a stern side from an air ejecting device which supplies air bubbles to the ship bottom, and comprising air intake holes formed in a portion of the recovery side chamber opposite to the ship bottom through a gap; and a recovering section recovering air inside a recovery side chamber. The air bubbles acquired from the air intake holes are once accumulated inside the recovery side chamber to generate pushing pressure occurs so that air can be smoothly recovered from the recovering section. | 04-25-2013 |
20130139746 | AIR LUBRICATION SYSTEM OF SHIP - A ship air lubrication system of an external installation type with good efficiency is desired to be provided. An air ejecting unit includes an ejecting side chamber installed in a ship bottom of a ship and having air ejecting holes formed in a surface opposite to the ship bottom on a lower side; and a supply section which supplies air into an inner space of the ejecting side chamber. When the air in the ejecting side chamber is ejected from the air ejecting holes, the air is sheared by an external water stream, and small air bubbles are supplied to the ship bottom. | 06-06-2013 |
20130269589 | REDUCING DRAG OF A HULL OF A SHIP - Disclosed is an apparatus for generating bubbles for reducing drag on a hull of a ship, wherein the bubble generating device is attachable to an outer surface of the hull, and wherein the apparatus comprises one or more microfluidic device for controlling a bubble size of the generated bubbles. | 10-17-2013 |
20140230715 | EXCITATION FORCE REDUCING TYPE SHIP - Disclosed is an excitation force reducing type ship. An excitation force reducing type ship according to one embodiment of the present invention comprises: a hull having a rear end with a propeller; and an excitation force reducing module which forms an air layer for generating reflected waves on a surface of the hull neighboring the propeller during an operation of the propeller so as to reduce the excitation force in the direction of the hull, wherein the excitation force reducing module can be arranged eccentrically with respect to a center line penetrating through the center of the axis of rotation of the propeller in a vertical direction of the hull. | 08-21-2014 |
20140238291 | Self-Powered Slip Plate To Reduce Skin-Friction Drag on a Marine Vessel - An anti-friction slip plate for mounting on a hull of a marine vessel to reduce skin friction drag by acoustically generating microcavitation bubbles at a wetted area of the hull. The slip plate comprises a plate-like enclosure, an energy extraction mechanism to extract power from water current flowing along the hull when underway, a power generator driven by the energy extraction mechanism to produce electrical power, an acoustic signal generator powered by the power generator to produce an acoustic signal, and a series of transducers excited by the acoustic signal to effect emission of acoustic waves that produce cavitation bubbles in the wetted area. A bottom surface of the slip plate serves as an acoustic diaphragm to impart cavitation bubbles at the wetted area interface. Optionally, a controller and/or status monitor may be provided to control and/or visual monitoring of power, acoustic frequency, intensity, duty cycle, or other parameters according to a condition of operation of the vessel or a condition of the water medium at the interface. | 08-28-2014 |
20140331912 | APPARATUS USING AN ELECTRO-CATALYTIC COATING TO REDUCE SHIP'S FRICTION AND PREVENT BIOFOULING - An apparatus for friction reduction and biofouling prevention is invented, which consists of an anodic electro-catalytic layer and a cathodic electro-catalytic layer installed on the submerged surface of a carrier. There is an insulating filling between the anodic layer and the cathodic layer. The layered coatings are applied with the use of electric arc spraying technique. A first DC power supply unit is connected to the anodic layer and the cathodic layer. The anodic layer, the cathodic layer, the DC power supply unit, and water together form the conducting path for water electro-catalysis. Hydrogen and oxygen gases are produced to form a thin gas film on the submerged surface to reduce friction and prevent biofouling on the carrier. Alternatively, the apparatus produces hydroxyl radicals to kill marine microorganisms and reduce the risk of biofouling and biocorrosion. | 11-13-2014 |
20160075406 | AIR LUBRICATION SYSTEM - A system for providing an air lubricating layer between a substantially flat bottom ( | 03-17-2016 |
20160185423 | DEVICE FOR REDUCING FRICTIONAL RESISTANCE, SHIP COMPRISING THE DEVICE, AND METHOD OF REDUCING FRICTIONAL RESISTANCE OF SHIP - A device for reducing frictional resistance includes: a chamber which is provided to a draft part of a hull and in which blowing holes blowing out air into the water of the outside of the hull from different positions to each other in a height direction of the hull are formed; a supply pipe supplying the air to an internal space of the chamber; and a distributor provided to each of the blowing holes, and guiding a part of the air, which was supplied inside the chamber from the supply pipe, to each of the blowing holes. The plurality of distributors has a flow-amount adjuster adjusting a flow amount of the air guided to the blowing hole corresponding to each of the distributors so that the flow amount of the air blown out from the plurality of blowing holes is equalized in each of the blowing holes. | 06-30-2016 |
20160251060 | HIGH EFFICIENCY COMPRESSOR AND DISTRIBUTION SYSTEM | 09-01-2016 |