A catamaran for a wheelchair has two parallel pontoons secured abeam a bow beam and a wheelchair engaging framework for selective attachment and submersion of a wheelchair in water between the pontoons behind the bow beam in use. The catamaran is able to engage a wheelchair in a simple and convenient manner for recreational water sport use by those of limited mobility.

A robotic system having a movable gantry robot (10) for conducting construction operations. The gantry may have an expandable bridge (20) and articulated gantry support legs (34) as well as a support track system (60) holding a gantry robot (800) which may hold one or more implements and peripheral devices (806). The device can be moved by propulsion mechanisms, a controller, and one or more geo-positioned control devices to provide position information for the robotic gantry as it moves back and forth along a plurality of work sites (700). The robotic gantry is connected to a power supply system (236). The controller is automated, self-navigating, and activates, deactivates, and/or changes the operation of the propulsion mechanisms, and deploys, retracts, activates, deactivates, and/or changes the operation of one or more of the construction implements. The height of the frame may be adjusted by extending and rotating risers and booms to accommodate different building heights or sub-level heights at a worksite. A conveyor system is optimized for removing dirt from or delivering material to the robotic arm. This invention can be applied to automating construction jobs including surveying, land preparation, excavation, foundation, masonry, framing, and additive fabrication.

An amphibious vehicle, which enables wave making resistance upon traveling on water to be reduced and propulsive performance of its vehicle main body to be improved, is to be provided. An amphibious vehicle of the present invention includes: a vehicle main body that is movable on water and on land; a rear portion flap having a front end portion fixed to a rear portion of the vehicle main body; and end plates respectively provided at both side end portions of the rear portion flap.

An amphibious vehicle, which enables wave making resistance upon traveling on water to be reduced and propulsive performance of its vehicle main body to be improved, is to be provided. An amphibious vehicle of the present invention includes: a vehicle main body that is movable on water and on land; a rear portion flap having a front end portion fixed to a rear portion of the vehicle main body; and end plates respectively provided at both side end portions of the rear portion flap.

An amphibious pumping vehicle has a floatable vehicle body, a ground engaging propulsion structure, a fluid pump, a plurality of fluid nozzles comprising a first fluid nozzle connected by a fluid conduit to the fluid pump and at least one second fluid nozzle connected to the fluid conduit, a valve structure in the fluid conduit, the plurality of fluid nozzles and the valve structure co-operating to provide directional control and motive power for the vehicle when floating, and a power source configured to provide power to both the ground engaging propulsion structure and the fluid pump.

An amphibious vehicle includes: an engine; at least one land traveling device; at least one water propelling device; a power distribution device configured to distribute power outputted from the engine between land travel power to be supplied to the at least one land traveling device and water propulsion power to be supplied to the at least one water propelling device; a slippage-amount detection device configured to detect a slippage amount of the at least one land traveling device relative to ground; and a controller configured to adjust at least the land travel power, of the land travel power and the water propulsion power, on the basis of the slippage amount detected by the slippage-amount detection device. The controller is configured to reduce the land travel power if the slippage amount detected by the slippage-amount detection device is greater than a threshold while the land travel power and the water propulsion power are supplied respectively to the at least one land traveling device and the at least one water propelling device for landing from water to land.

An amphibious vehicle includes: an engine; at least one land traveling device; at least one water propelling device; a power distribution device configured to distribute power outputted from the engine between land travel power to be supplied to the at least one land traveling device and water propulsion power to be supplied to the at least one water propelling device; a slippage-amount detection device configured to detect a slippage amount of the at least one land traveling device relative to ground; and a controller configured to adjust at least the land travel power, of the land travel power and the water propulsion power, on the basis of the slippage amount detected by the slippage-amount detection device. The controller is configured to reduce the land travel power if the slippage amount detected by the slippage-amount detection device is greater than a threshold while the land travel power and the water propulsion power are supplied respectively to the at least one land traveling device and the at least one water propelling device for landing from water to land.

A pressure system of a suspension device for an amphibious vehicle includes: a pump configured to discharge a working fluid; a first control valve disposed in a first flow path extending between the pump and a first hydraulic chamber, the first control valve being configured to control supply of the working fluid from the pump to the first hydraulic chamber; a pilot check valve disposed in a portion of the first flow path which extends between the first hydraulic chamber and the first control valve, the pilot check valve being configured to open and close the first flow path in accordance with a pilot pressure; and a second control valve disposed in a pilot flow path extending between the pump and the pilot check valve, the second control valve being configured to control supply of the pilot pressure to the pilot check valve.

A multifunctional all-terrain vehicle having a body for accommodating people and cargo, an engine, and a transmission having axles and wheels. Disposed on the axles are brake discs gripped within brake pads which are actuated by brake cylinders disposed in a carriage and forming a brake system, and can be used for traveling over land, water, swamps, snow. According to the invention, a single frame is configured as a three-dimensional structure, and waterproofing is additionally provided with a vertically adjustable seat.

A multifunctional all-terrain vehicle having a body for accommodating people and cargo, an engine, and a transmission having axles and wheels. Disposed on the axles are brake discs gripped within brake pads which are actuated by brake cylinders disposed in a carriage and forming a brake system, and can be used for traveling over land, water, swamps, snow. According to the invention, a single frame is configured as a three-dimensional structure, and waterproofing is additionally provided with a vertically adjustable seat.