Abstract: An articulated shaft for an amphibian drive line that includes at least three shaft portions, and at least three points of articulation, wherein the articulated shaft is movable between a protracted position for use of the amphibian on land and a retracted position for use of the amphibian on water.

Abstract: An amphibious vehicle power train having an engine (2) with an output shaft (4), driving an input member (6) of a variable speed change transmission (11). The speed change transmission, which may be a continuously variable transmission is arranged to drive road wheels through an output member (8). The engine also drives a marine propulsion unit (24). The axis of the output member (8) is above the axis of the input member (6). Four wheel drive may be provided (FIG. 2).

Abstract: A vehicle is provided that is amphibious to include submersible operations. The vehicle has wings configured to generate a sufficient dive force to oppose buoyancy of the vehicle, when desired, which are disposed on opposing sides of a central hull. The vehicle is configured to enable easy transition from land operations to water operations, to include water surface travel as well as submerged travel.

Abstract: An amphibious, all-terrain vehicle utilizing a pair of hydrostatic pumps to independently provide power to hydraulic drive mechanisms of the left and right side of the vehicle respectively. The hydraulic drive mechanisms on a side of the vehicle comprise a plurality of hydraulic wheel motors and a hydraulic propeller motor. Using a novel hydraulic manifold assembly, the vehicle can operate in three distinct modes: wheels only, wheels and propellers, and propellers only. The hydraulic manifold assembly also allow the vehicle to by put in neutral mode for starting. The wheel motors are mounted in a pair of undercarriage assemblies that are outside of the vehicle's body and fluidly connected to the hydraulic manifold assembly thorough a hose chase that extends well above the vehicle's waterline to eliminate the potential for water to enter the body of the vehicle when operated in the water.

Abstract: An amphibious, all-terrain vehicle utilizing a pair of hydrostatic pumps to independently provide power to hydraulic drive mechanisms of the left and right side of the vehicle respectively. The hydraulic drive mechanisms on a side of the vehicle comprise a plurality of hydraulic wheel motors and a hydraulic propeller motor. Using a novel hydraulic manifold assembly, the vehicle can operate in three distinct modes: wheels only, wheels and propellers, and propellers only. The hydraulic manifold assembly also allow the vehicle to by put in neutral mode for starting. The wheel motors are mounted in a pair of undercarriage assemblies that are outside of the vehicle's body and fluidly connected to the hydraulic manifold assembly thorough a hose chase that extends well above the vehicle's waterline to eliminate the potential for water to enter the body of the vehicle when operated in the water.

Abstract: An amphibious vehicle has retractable road wheels to allow planing over water. Power to the road wheels is disconnected automatically as the wheels are retracted. This may be achieved through a cable attached to a suspension rocker arm to disconnect a dog clutch attached to the input shaft of a differential as the wheels are retracted; and vice versa. The system may be fitted to a steered axle or to any suitable retractable suspension system.

Abstract: Power train or an amphibious vehicle having an engine, transmission, and transfer case position in-line with longitudinal vehicle axis towards the rear of the vehicle, with transmission output facing the front of the vehicle. The transfer drive drives the rear wheels via propeller shaft, which extends adjacent the engine to rear differential. A marine drive PTO (power take off) may be taken from a shaft from the transfer case, from the propeller shaft, or from engine crankshaft pulley. Marine drive shaft may run below the engine, or alongside it, on the opposite side of the engine from propeller shaft. Decouplers may be provided to the PTO drive, to at least one rear wheel, and on the optional front axle propeller shaft.

Abstract: Power train for an amphibious vehicle has an engine aligned with vehicle axis. The crankshaft drives optional flexible coupling, shaft, and optional decoupler. Drive shaft drives marine propulsion means, which may be a water jet drive or a screw propeller. Shaft also drives bevel gear, which drives transmission through bevel gear and input shaft. Hence, transmission is mounted transversely, and perpendicular to the engine. The bevel gears, coupling and decoupler are contained in a casing. Transmission drives road wheels through integral differential, drive shafts, and relay shaft. Transmission may be manual, sequential change manual, automated manual, automatic, or continuously variable transmission. The engine may be offset to the vehicle center line.

Abstract: An amphibious vehicle power train has an engine with crankshaft and solid or fluid flywheel; a transmission arranged in line with the crankshaft, with an input shaft driven from the flywheel; and a power take off for driving shafts and marine propulsion means. The power take off has a driving sprocket attached to the crankshaft, a chain or belt, and a driven sprocket. Bevel gears are provided to convert transverse engine crankshaft rotation to longitudinal marine drive.

Abstract: Power train (20) or an amphibious vehicle comprises engine (8), transmission (9), and transfer case (13) position in-line with longitudinal vehicle axis (A), (FIG. 2), towards the rear of the vehicle, with transmission output (11) facing the front of the vehicle. The transfer drive drives the rear wheels via propeller shaft (15), which extends adjacent the engine to rear differential (6). A marine drive PTO (power take off) may be taken from a shaft from the transfer case (37), (FIGS. 6 to 10), from the propeller shaft (15) (FIG. 4), or from engine crankshaft pulley (2). Marine drive shaft (3) (FIGS. 6 to 10) may run below the engine, or alongside it, on the opposite side of the engine from propeller shaft (15). Decouplers (4, 24, 26; 38, 40, 41) may be provided to the PTO drive, to at least one rear wheel, and on the optional front axle propeller shaft (16).

Abstract: A drive train for an amphibious vehicle provided with a propellor disengaging mechanism aft of the transfer case, thus allowing the output drive shafts to be continuously driven at all times. The drive train includes a motor attached to a transmission which is attached to a transfer case. The attachments are accomplished by rotatably coupled drive shafts. The drive train transfers rotational movement from the motor to the transmission, then to a transfer case where it is output to the various drive shafts enabling the vehicle to be propelled on land and in water.

Abstract: A utility vehicle integrated a motorcycle and a motorized watercraft within a hull is presented. It can be set in a motorcycle status or a motorized watercraft status. The two statuses of the vehicle shares a driving power source, and a driving power shifting control system is used to shift the driving power to either one of the two statuses with rider's choice. A steering system also is used to control the move directions for both the motorcycle status and the motorized watercraft status. The hull of the vehicle is formed by a front hull with a front wheel cabinet and a rear hull with a rear wheel cabinet, and it is sealed to make the vehicle buoy on the water surfaces as a motorized watercraft. The wheels of the vehicle can be pushed out with the open of the wheel cabinet doors to stand as a conventional motorcycle, or can be pulled back and hide in the wheel cabinets with the close of the wheel cabinet doors.

Abstract: An amphibious vehicle having a hull that includes a pod formed in the bottom of the hull for receiving the engine and drive train. The pod is concave down with respect to the balance of the hull. Foam filled compartments formed lateral to the pod assure buoyancy and stability. Truck engine, transmission, suspension and control system components are carried by the hull and used to move the amphibious vehicle on land and, using the power take off of the engine to drive a marine propulsion system, on water as well. A first drive shaft, turned by the engine, extends through the hull to connect operatively with an axle and rotate front and rear sets of wheels. A second drive shaft runs from the engine through the hull wall to the marine propulsion system.