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JP6883862B2 |
A ship setting a small duct of the present invention includes a propeller 10 and a duct 20, a propeller load condition of the ship's hull 1 in an actual sea is set to 1.0 or more and a vortex resistance of the ship's hull 1 in the actual...
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JP6865066B2 |
To suppress an occurrence of a hub eddy in a propulsion device for a vessel and the vessel.A propulsion device for a vessel includes a propeller shaft supported to be freely rotated on a back unit of a hull, and a propeller 21 connected ...
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JP6857864B2 |
To provide a frictional resistance reducing method for reducing frictional resistance of an object (structure) such as hull, a structure with reduced frictional resistance and a method for forming electrodes for reducing frictional resis...
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JP6856915B2 |
A hull propulsion mechanism (1) comprises a ship body (2); a wind blade (3), which is set to the top of the ship body (2) and has a plurality of sails (3a) for obtaining a rotating force from wind blade (3); a shaft (4), which sustains t...
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JP2021045095A |
To provide a hull form small-sized robot that can sail or travel under water with variation in water depth such as a paddy field for a purpose of removing weeds.A hull form small-sized robot includes: a hull (1) capable of floating under...
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JP2021046933A |
To provide a vibration control system that can effectively control vibration, and to provide a structure, a marine vessel, a vibration control method and a vibration control program.A vibration control system includes: a piezoelectric el...
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JP2021037828A |
To obtain a good propeller efficiency by reducing hub vortex even in a case when a pitch angle of a propeller blade is varied.A propeller blade for a variable pitch propeller is fitted rotatably to a propeller boss. A fin is provided beh...
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JP6832304B2 |
The present invention provides a ship propulsion apparatus, which is possible to collect axial flow energy generated by rotation of a propeller, and a ship. The ship propulsion apparatus comprises: a propeller formed on a stern portion; ...
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JP6836041B1 |
To provide a method for extracting feature quantity information of a propeller shaft frequency, a blade frequency and a propeller blade number by a voice sensor in order to determine a type of a ship by a simple operation. (1) A step of ...
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JP2021020556A |
To provide a ship propulsion device capable of inhibiting increase of underwater resistance even in a case that an electric motor is provided at an outboard engine.An outboard engine 100 includes: an electric motor 2; an engine 1; a tran...
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JP2021020504A |
To provide an outboard engine which can inhibit increase of underwater resistance while inhibiting complication of a structure for cooling an electric motor.An outboard engine 100 includes: an engine 1; an electric motor 2; a propeller 3...
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JP6827034B2 |
This ship propulsion device is equipped with an energy-saving appendage 5 which is located forward of a propeller 1 and which has a curved surface having a radius R smaller than the radius r of the propeller 1. The pitch of the blades 3 ...
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JP6826276B1 |
To provide a method for identifying the degree of propeller cavitation. A step of collecting a noise signal of a propeller in water, a step of obtaining a circulation density spectrum, a step of averaging and constructing an enhanced env...
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JP6812057B2 |
To provide a marine propulsion device and a ship equipped with the same capable of improving propulsion performance while securing silence characteristics at the navigating time.A screw propeller (1) comprises: a propeller boss (2) havin...
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JP6811978B2 |
To provide a composite material using a dilatant fluid, which can be used for various purposes by varying rigidity according to an oscillation speed.This composite material using a dilatant fluid 14 comprises: a dilatant fluid; and an op...
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JP6802427B1 |
To disclose an imaging assisting device for underwater photography. A first-way adjusting device is installed at the right end inside the main body including the main body, and a second-way adjusting device is installed in the middle of ...
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JP6799374B2 |
The invention relates to an underwater turbine for use under water, that may comprise fish, for instance intended for placement under water in the sea, such that electricity can be generated by tidal currents, the underwater turbine comp...
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JP6783243B2 |
This marine propulsion unit (100) includes a duct (1) including a stator (11), a propeller (2) including a rim (21) including a rotor (23) disposed at a position that faces the stator and a blade (22) provided radially inward of the rim,...
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JP6778599B2 |
To reduce a wave drift force applied to a floating body structure by using a wave force.A floating body structure 1 is provided with: a floating body 2 that floats on the water level; and a thrust generating mechanism 3 that is connected...
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JP2020175877A |
To provide a propulsion device for a vessel.A propulsion device for a vessel includes: a gear box; a screw propeller, an annular fluid guiding unit; and a rectifying nozzle. The gear box includes a box and a transmission shaft. The trans...
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JP6770064B2 |
An appendage 8 for reducing a hub vortex is arranged, through a support 7 extending from a hull 2, behind a propeller (wing propeller) 4 having no rudder behind the propeller. The appendage 8 is in the form of a spindle having a circular...
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JP2020133579A |
To provide an impeller capable of preventing noise due to Karman vortex.An impeller 10 includes a plurality of impeller blades 12 arranged side by side in a rotation direction R. A linear member 13 is attached to a rear edge of at least ...
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JP6739448B2 |
A robotic device for inspecting a pipe includes at least one pair of propulsion elements each including a rotary drum, an outer surface of which has a screw thread. The device also includes a body associated with at least one pair of pro...
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JP6720302B2 |
The invention relates to a cover device for at least sectional closing of an underwater opening in a hull of a watercraft, in particular an opening of a transverse channel of a thruster. According to the invention the cover device includ...
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JP2020518508A |
The present invention relates to a covering device for at least partially closing an underwater opening in the hull of a ship, particularly an opening in a transverse channel of a thruster. According to the present invention, the coverin...
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JP6706560B2 |
To provide an assembly ship propeller which enables easy change of pitches of propeller blades.A ship propeller 1 includes: propeller blades each including a blade flange 31; a hollow propeller boss 2 provided with a blade fixation hole ...
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JP2020050315A |
To provide a flapping operation mechanism allowing for flapping operation having a large actively controllable area, a method of using the same, and a propulsion device using the same.The flapping operation mechanism comprises a differen...
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JP6670052B2 |
To provide a propeller with large torque having a shape that can make a propeller provide large rotation torque.At a cross section of a maximum chord length part 3B of a vertical lift-type blade 3, a front edge is shaped into a spherical...
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JP2020032956A |
To provide an entirely new in-liquid self-propelling type in-liquid propulsion device having elastic wave motions propagating in the vicinity of a substrate surface as a propulsion force generation source.An in-liquid propulsion device i...
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JP6651688B2 |
To stably supply boil-off gas to an engine even when pressurized boil-off gas is supplied to the engine under a use condition including a case in which use of a boil-off gas liquefier causes a composition ratio of boil-off gas to fluctua...
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JP6605272B2 |
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JP2019189197A |
To provide a water surface propulsion device which is light weight, easy to carry, and with high operability.A water surface propulsion device to be attached to a floating body is composed with: a slider composed to be attached to the fl...
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JP6600119B2 |
The present invention relates to a novel propeller for a marine vessel and a method of installing the hub cap to the hub. More specifically, the present invention relates to hub caps for use in connection with both fixed pitch and contro...
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JP6589234B2 |
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JP2019156095A |
To provide a propeller boss cap with a fin, which can be manufactured at lower cost than a conventional product.A boss cap is attached to a propeller boss, and in regards to the boss cap with a plural of fins attached to an outer periphe...
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JP6560511B2 |
The purpose of the present invention is to provide a horizontal shaft rotor that is for use in a propulsion machine, that makes it possible to change the position of a blade of the horizontal shaft rotor such that the pitch angle thereof...
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JP6554520B2 |
A drive for a boat, in particular a sailing boat, comprising an electric motor configured for the operation in the first quadrant and in the fourth quadrant, a propeller connected to the electric motor, and a control device. The control ...
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JP2019119436A |
To provide a diffuser type end plate propeller driving a hull and including a propeller hub and a plurality of blades.A blade body is connected to a propeller hub and is extended to an end plate (124) corresponding outside from the prope...
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JP6532050B2 |
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JP6527570B2 |
To provide an amphibious unmanned aerial vehicle capable of flying in the air and navigating on water, a control system and method therefor and a landing control method therefor.An unmanned aerial vehicle 100 comprises a vehicle body 10,...
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JP3221317U |
To provide an ultra-lightweight composite material propeller for an outboard motor, which facilitates replacement when damaged, improves fuel efficiency by weight reduction, and facilitates mass production. A hub 10 having a cylindrical ...
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JP6510043B2 |
A lock mechanism includes a snapping part and a pressing part configured to be slidably connected with a first body. The pressing part includes a pressing end and an abutting end opposite to the pressing end. The abutting end is configur...
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JP6504655B2 |
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JP6498283B2 |
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JP6493912B2 |
To provide a robot for amphibian survey, which is compact, which can move in a narrow pipe path and on a grating floor even in atmosphere without air, and which can travel in water.A robot 10 for amphibian survey comprises: a robot body ...
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JP6493826B2 |
To accomplish the purpose of taking measures against cavitation, taking measures against a following wake, reducing viscosity resistance, reducing the occurrence of vibromotive force, improving a propulsion speed and pursuing the improve...
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JP2019043283A |
To provide a rotor blade installed in a water channel so as to prevent a large upsurge of water by the blade rotation.A lift-type rotor blade 1 of a horizontal shaft type-rotor 10 has a large chord length from the blade root to the blade...
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JP6479975B2 |
The present invention discloses an unmanned aerial vehicle, comprising a propulsion system (100), the propulsion system comprising a driving device (10) and a propeller (20). The driving device (10) comprises a body portion (12) and a dr...
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JP6475436B2 |
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JP2019018585A |
To alleviate properly a big shock generated at the time of rapid acceleration/deceleration and so on while alleviating a small shock generated at the time of shifting gears and so on.The propeller damper (4) connecting the propeller shaf...
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