A watercraft propulsion system is disclosed for an amphibious vessels. The watercraft propulsion system includes a waterjet on each side of the vessel which consist mainly of an impeller, inlet assembly, and stator assembly. The waterjets resists vibrational fatigue and failure through specialized welding between the struts and the inside of the conduit of the inlet assembly. The waterjets can be retrofitted to existing drive shafts to meet the performance requirements of differing amphibious and other marine vessels and to accommodate space limitations. The waterjets are easily installed and removed.

An amphibious vehicle having a frame that includes a plurality of floatable members. Mounted to the frame is one or more power sources. Also mounted to the frame and connected to the power source are a plurality of propellers with each of the plurality of propellers having a thrust vector configured to be adjusted to provide agitation and propulsion. In addition, mounted to the frame are a plurality of ground engaging devices and one or more pumps.

To enlarge a collapsible flap and store the collapsible flap appropriately. In an amphibious vehicle (1) in which a flap (13) which receives lift from water in water navigation is provided to be deployable and storable at a front side in a travel direction of a vehicle body (11), the flap (13) includes a lower flap (21) which is stored to come close to a front surface (11a) of the vehicle body (11) and an upper flap (22) which is stored to come close to an upper surface (11b) of the vehicle body (11), and at least one of the lower flap (21) and the upper flap (22) includes a first flap member (31) and a second flap member (32) and is configured such that a flap length (L.sub.13) in a direction orthogonal to a vehicle width direction is variable.

A wheel-legged amphibious mobile robot with a variable attack angle, which belongs to the technical field of robot structure technology. The robot includes three parts: motion unit, body trunk and power unit. As a key structure, the motion unit mainly includes a moving mechanism, a wheel assembly, a telescopic mechanism and a transmission device. The robot drives the telescopic mechanism to reciprocate linearly through a gear and rack set, and pushes “legs” to expand and retract, so as to realize a mutual switching between a wheeled mode and a gait mode. Under transmission of bevel gear set, the blades can rotate at any same angle at the same time, to change the attack angle and realize the steering. The robot provided by the present disclosure can effectively adapt to a complex and harsh amphibious environment, and meet a series of operation requirements such as rapid movement, obstacle climbing, underwater steering.

A two wheeled planing amphibian (10) has a hull (20), bow (24), front wheel (30) and rear wheel (40). Front suspension (32) and rear suspension (42) are retractable, separately or simultaneously. Front wheel (30) may retract vertically or rotationally. Steering is by handlebars (50), link (54), and forks (36). Front wheel (20) may be located outside the hull in both protracted and retracted positions. The underside of hull (20) may be continuous in both land mode and marine mode along and across its centreline from the bow to the rearmost underside point on the hull along the centreline; or from the forwardmost underside point on the hull when it is planing at its lowest speed to the rear. There may be no wheel closures attached to the hull. A wheel bay (22), which is open at its top side, may be provided to allow rear wheel retraction.

A transmission for a vehicle, particularly a skid-steered vehicle, that employs motive power from a prime mover delivered through an input shaft to drive left and right drive shafts at a nominal speed and input power from an electric motor to vary the speed of the left and right drive shafts according to steering commands from a steering control structure. The speed of the left and right drive shafts is directly related to a speed of the input shaft and the nominal speed of the left or right drive shaft is varied upwardly or downwardly by a ratio of the speed of the steering shaft via a speed varying structure. The speed of the left and right drive shafts is simultaneously varied in opposite directions (i.e. upwardly and downwardly) relative to the nominal speed by an equal number of rotations.

An amphibious vehicle has a floatable vehicle body; ground engaging propulsion structure having a plurality of ground engaging elements powered by a hydraulic motor; a fluid pump for pumping liquid manure; a power source connected to a hydraulic pump and configured to provide power to both the ground engaging propulsion structure and the fluid pump; and, remote control structure for controlling the ground engaging propulsion structure and a flow of fluid from the fluid pump. The speed and/or direction of the vehicle is remotely controllable by an operator remote from the vehicle when the vehicle is ground engaging and when the vehicle is floating.

A two-wheel mobile apparatus that is movable on land and water includes a cabin and a propulsion unit. The cabin is configured to be watertight to a height above a waterline when the mobile apparatus moves on water. Further, the cabin accommodates an occupant and isolates the occupant from the outside of the cabin. The propulsion unit includes a rotatably driven impeller and moves the mobile apparatus on water. An orientation detection unit that detects orientation of the mobile apparatus. A tilt correction unit corrects tilt of the mobile apparatus on land. An oscillation reduction unit reduces oscillation of the mobile apparatus on water. An orientation control unit switches between actuation of the tilt correction unit and actuation of the oscillation reduction unit based on a detection value of the orientation detection unit.

An amphibious platform vehicle-vessel to support and to move hydraulically operated and controlled earth-moving and lifting equipment, such as excavators and cranes, on solid ground, semi-solid or marshy ground, shallow water, and deeper water. The modular units can be transported to a worksite on separate trailers and assembled and reconfigured on site. Two compartmented pontoon units are mounted to an adaptive cross member that can accommodate different types of moving-lifting equipment through different mounting flanges, and to auxiliary cross members. Propulsion is provided through amphibious cleats on drive chains in chain tracks driven by dual-motor driving drums and over a tension-adjusting passive chain roller, surrounding a sealed pontoon shell internally reinforced with bulkhead partitions, beam shell-bottom stiffeners, and pressed-angle shell-bottom stiffeners. An extendable auxiliary float can be extended outward from each compartmented pontoon for increased stability in floating operations.

The invention relates to a swim arrangement (A) for facilitating amphibious operation of a tracked vehicle (V1). Said tracked vehicle comprises a vehicle body (10) and a two track assemblies (T1, T2) suspendedly connected to the vehicle body for driving the vehicle, each track assembly (T1, T2) comprising a drive means driven endless track (4). The vehicle body comprises under structure portions (12, 14), each under structure portion (12, 14) miming over an upper side (4a) of a track (4) of a track assembly (T1, T2). Each under structure portion (12, 14) is configured to be arranged at a distance from the upper side (4a) of the track (4) during land operation of the vehicle so that a space (S1, S2) is provided. The arrangement (A) comprises means (20, 30, 100) for reducing said space (S1, S2) so as to, during swimming operation, reduce the flow of water between the under structure portion (12, 14) and the upper side (4a) of the track (4) caused when the tracks (4) are driven.