Abstract: An outboard motor includes an engine, a drive shaft, and a shift shaft disposed forward of the drive shaft. The shift shaft includes a first shift shaft that extends in an upward-downward direction, a second shift shaft disposed below the first shift shaft and spaced apart from and rearward of the first shift shaft, the second shift shaft extending in the upward-downward direction, and a shift force transmission to transmit, to the second shift shaft, a shift force applied to the first shift shaft.

Abstract: A marine propulsion unit includes a motor driving force transmission shaft, a propeller shaft, and a shaft including one of a switching shaft and a drive shaft, and one of the motor driving force transmission shaft and the shaft includes a hollow member, and the other of the motor driving force transmission shaft and the shaft is disposed inside the hollow member.

Abstract: When a shift member is in a first position, a first clutch couples a second drive shaft to a first drive shaft. When the shift member is in the first position, a second clutch decouples a first gear from the first drive shaft. When the shift member is in the first position, a third clutch decouples a second gear from the second drive shaft.

Abstract: An engine includes a crankshaft extending in a vertical direction. A drive shaft is connected to the crankshaft and coaxial with the crankshaft. A water intake passage is connected to the engine. A water pump is connected to the water intake passage. The water pump includes a pump shaft. The pump shaft is eccentrically mounted with respect to the drive shaft and parallel or substantially parallel to the drive shaft. The pump shaft rotates according to rotation of the drive shaft.

Abstract: The present invention is a composition of an agent for treating a precursor of a three-dimensional object for removing a support material from a precursor of the three-dimensional object containing a three-dimensional object and the support material, the composition containing water and a water-soluble compound having a solubility parameter (SP value) calculated by using the Fedors' method of 8 (cal/cm3)1/2 to 13 (cal/cm3)1/2. The present invention can provide a composition of an agent for treating a precursor of a three-dimensional object that is capable of removing the support material quickly and a method for manufacturing a three-dimensional object using the composition of an agent for treating a precursor of a three-dimensional object by a fused deposition modeling system.

Abstract: A propulsion system for a vessel includes an engine propulsion unit that provides a propulsive force to a hull by using an engine as a power source, an electric propulsion unit that provides a propulsive force to the hull by using an electric motor as a power source, a storing mechanism that is displaced from an actuating position to actuate the electric propulsion unit to a storing position to store the electric propulsion unit and performs a storing operation to store the electric propulsion unit, and an interlock controller that interlocks a storing operation of the storing mechanism with generation of a propulsive force by the engine propulsion unit.

Abstract: A propulsion system for a vessel includes an engine propulsion unit that provides a propulsive force to a hull by using an engine as a power source, an electric propulsion unit that provides a propulsive force to the hull by using an electric motor as a power source, a storing mechanism that is displaced from an actuating position to actuate the electric propulsion unit to a storing position to store the electric propulsion unit and performs a storing operation to store the electric propulsion unit, and an interlock controller that interlocks a storing operation of the storing mechanism with generation of a propulsive force by the engine propulsion unit.

Abstract: The method for manufacturing a soluble material for three-dimensional modeling that is used as a material of a support material that supports a three-dimensional object when manufacturing the three-dimensional object with a 3D printer of a fused deposition modeling system, comprising a kneading step of kneading raw materials of the soluble material for three-dimensional modeling by a twin screw extruder having a screw configuration in which a ratio of a total length K of kneading discs to a total length L of an effective screw is 0.20<K/L<0.70 and in which a temperature Tmix of the raw materials of the soluble material for three-dimensional modeling in the kneading step and a glass transition temperature Tg of a base polymer contained in the raw materials of the soluble material for three-dimensional modeling satisfy a formula Tg+80(° C.)<Tmix<Tg+200(° C.).

Abstract: An electric propulsion device includes a duct having a cylindrical shape and that includes a stator. A rim includes a rotor rotatable relative to the duct, and a plurality of fins. A bracket supports the duct so as to allow the duct to turn about a turning axis that intersects with the rotation axis of the rim, and a turning actuator that integrally turns the duct and the rim. The turning actuator is fixed to the bracket, and the duct is turnable relative to the bracket.

Abstract: A propulsion system for a vessel includes an engine propulsion unit that provides a propulsive force to a hull by using an engine as a power source, an electric propulsion unit that provides a propulsive force to the hull by using an electric motor as a power source, a storing mechanism that is displaced from an actuating position to actuate the electric propulsion unit to a storing position to store the electric propulsion unit and performs a storing operation to store the electric propulsion unit, and an interlock controller that interlocks a storing operation of the storing mechanism with generation of a propulsive force by the engine propulsion unit.

Abstract: A marine propulsion device includes a power source, a steering handle, and an accelerator grip that moves with respect to the steering handle. A movement region of the accelerator grip includes a forward movement rotation region, a reverse movement rotation region and an axis movement region. In the forward movement rotation region, the accelerator grip is operated to rotate so as to obtain a drive force in a forward movement direction. In the reverse movement rotation region the accelerator grip is operated to rotate so as to obtain a drive force in a reverse movement direction. The axis movement region is provided between the forward movement rotation region and the reverse movement rotation region. In the axis movement region, the accelerator grip is moved in the extensional direction of a rotation axis.

Abstract: A boat maneuvering system includes a power source, a first operating device configured to operate the power source, a first controller configured to control the power source, a second controller configured to accept an operation instruction input from the first operating device and to output a control signal to the first controller, a first electric power line that connects the power source to a battery to convey electric power therebetween, a second electric power line that connects the second controller to the battery to convey electric power therebetween, a communication path that connects the first controller and the second controller to convey a signal therebetween, and a signal conversion portion provided on the communication path to electrically separate the first and second controllers.

Abstract: A boat maneuvering system includes a power source, a first controller that controls the power source, a display device that has a touch panel function and displays an operation screen configured to operate the movement of a boat, and a second controller that is communicatively connected to the first controller and enables an operation of the boat through the operation screen when detecting a plurality of operations on the display device simultaneously.

Abstract: A boat maneuvering system, including a first power source having a first controller, a first operating device having a second controller configured to receive a first operation instruction and to output a first control signal for controlling the first power source, a second power source provided separately from the first power source, and a second operating device provided separately from the first operating device for operating the first and second power sources. The second operating device includes a third controller provided on a communication path connecting the first and second controllers, the third controller being configured to receive the first control signal, generate a second control signal, and output the second control signal to the first controller, and to receive a second operation instruction via the second operating device, generate a third control signal, and output the third control signal to the second power source.

Abstract: A boat maneuvering system includes a power source, a first controller that controls the power source, a display device that has a touch panel function and displays an operation screen configured to operate the movement of a boat, and a second controller that is communicatively connected to the first controller and enables an operation of the boat through the operation screen when detecting a plurality of operations on the display device simultaneously.

Abstract: A boat maneuvering system, including a first power source having a first controller, a first operating device having a second controller configured to receive a first operation instruction and to output a first control signal for controlling the first power source, a second power source provided separately from the first power source, and a second operating device provided separately from the first operating device for operating the first and second power sources. The second operating device includes a third controller provided on a communication path connecting the first and second controllers, the third controller being configured to receive the first control signal, generate a second control signal, and output the second control signal to the first controller, and to receive a second operation instruction via the second operating device, generate a third control signal, and output the third control signal to the second power source.

Abstract: A boat maneuvering system includes a power source, a first operating device configured to operate the power source, a first controller configured to control the power source, a second controller configured to accept an operation instruction input from the first operating device and to output a control signal to the first controller, a first electric power line that connects the power source to a battery to convey electric power therebetween, a second electric power line that connects the second controller to the battery to convey electric power therebetween, a communication path that connects the first controller and the second controller to convey a signal therebetween, and a signal conversion portion provided on the communication path to electrically separate the first and second controllers.

Abstract: A marine propulsion device includes a power source, a steering handle, and an accelerator grip that moves with respect to the steering handle. A movement region of the accelerator grip includes a forward movement rotation region, a reverse movement rotation region and an axis movement region. In the forward movement rotation region, the accelerator grip is operated to rotate so as to obtain a drive force in a forward movement direction. In the reverse movement rotation region the accelerator grip is operated to rotate so as to obtain a drive force in a reverse movement direction. The axis movement region is provided between the forward movement rotation region and the reverse movement rotation region. In the axis movement region, the accelerator grip is moved in the extensional direction of a rotation axis.

Abstract: An electric propulsion device includes a duct having a cylindrical shape and that includes a stator. A rim includes a rotor rotatable relative to the duct, and a plurality of fins. A bracket supports the duct so as to allow the duct to turn about a turning axis that intersects with the rotation axis of the rim, and a turning actuator that integrally turns the duct and the rim. The turning actuator is fixed to the bracket, and the duct is turnable relative to the bracket.

Abstract: A valve actuating system for actuating at least one valve of an engine includes an improved mechanism for varying the timing and/or lift of the valve. The mechanism uses two adjacent rockers that cooperate with two adjacent cams of a camshaft. In one operating condition, movement of a first rocker is transmitted to the valve through the second rocker and in another operating condition only the movement of the second rocker is transmitted to the valve. The rockers preferably cooperate with cams having different lifts. The lift of the cam driving the first rocker preferably is greater than the lift of the cam driving the second rocker.