Abstract: A drive mechanism for a mobile vehicle has one first hydraulic motor (9) and one second hydraulic motor (10) which are in permanent operative connection via a summarizing transmission (12, 14) and drive one output shaft (17). In order to make possible, driving a first hydromotor (9) above its admissible maximum rotational speed, the first hydromotor (9) is adjusted to zero displacement and hydraulically separated form the high pressure.

Abstract: A frame structure of a vehicle includes a flywheel housing, an intermediate housing and a transmission case that are connected to each other along a longitudinal axis of the vehicle to constitute a vehicle frame with an inner space for accommodating a running-power transmission path for transmitting power from an engine to drive wheels via a HST unit. The flywheel housing has a first end connected to the engine and a second open end opposite to the first end along the longitudinal axis of the vehicle. The intermediate housing has a hollow shape with a first end and a second end located along the longitudinal axis of the vehicle. The first end has an abutting surface against which the second end of the flywheel housing abuts, a support surface located radially inwardly of the abutting surface so as to support the HST unit, and an opening surrounded by the support surface. The opening serves as a first-end opening of the intermediate housing along the longitudinal axis of the vehicle.

Abstract: A hydrostatic transmission circuit for a vehicle having at least two displacement members (12) driven by at least one hydraulic motor (10) having a feed main duct and a discharge main duct (16, 18). Skid control means for controlling skidding of at least one displacement member comprise a skid control valve (20) and an additional valve (22) that are disposed in parallel on a main duct (16). At least the skid control valve (20) has a constriction of variable section, while the additional valve has two end positions (22A, 22B), in which its through sections are respectively at their maximum and at their minimum. Control means (UC, 26, 28) make it possible to cause said valves to move as a function of a skid situation detected by detection means (24).

Abstract: A vehicle that has a frame, a front axle secured to the frame near the front thereof and a pair of rear axle shafts secured to the frame near the rear thereof. The vehicle also has a seat for at least two occupants and a dashboard. The vehicle further includes a load bed positioned on the vehicle which extends toward the rear of the utility vehicle from directly proximate the seat and over the rear axle shafts, and a prime mover mounted on the vehicle between the dashboard and the rear axle shafts. Finally, the vehicle has a hydraulic pump secured to the frame and coupled to a prime mover, a hydraulic motor, a gear box with a gear box input shaft driven by a hydraulic motor output shaft, a plurality of gears driven by the gear box input shaft and a differential driven by the plurality of gears.

Abstract: The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5?) and whose absorption volume can be regulated by means of a regulator (40, 41). One respective hydraulic motor (6, 25) for a drive train is provided per respective right or left vehicle side. The regulators (40, 41) are actuated by a respective regulator piston (7, 26). The regulator pistons (7, 26) of both hydraulic motors (6, 25) can be subjected to a force by means of a common high pressure, which equals the highest pressure that prevails in the service lines (4, 41, 5, 5?) of both hydraulic motors (6, 25). Each force is opposed to a respective counter-force, which is generated by a control pressure in a control pressure chamber (11, 11?).

Abstract: A frame structure of a vehicle includes a flywheel housing, an intermediate housing and a transmission case that are connected to each other along a longitudinal axis of the vehicle to constitute a vehicle frame with an inner space for accommodating a running-power transmission path for transmitting power from an engine to drive wheels via a HST unit. The flywheel housing has a first end connected to the engine and a second open end opposite to the first end along the longitudinal axis of the vehicle. The intermediate housing has a hollow shape with a first end and a second end located along the longitudinal axis of the vehicle. The first end has an abutting surface against which the second end of the flywheel housing abuts, a support surface located radially inwardly of the abutting surface so as to support the HST unit, and an opening surrounded by the support surface. The opening serves as a first-end opening of the intermediate housing along the longitudinal axis of the vehicle.

Abstract: A hub drive includes an in-hub motor and a shifting in-hub transmission coupled with the motor. A hub drive wheel assembly includes a wheel comprising a hub, an in-hub motor, and a shifting in-hub transmission having an input attached to the motor and an output attached to the wheel. A vehicle includes a chassis, a wheel comprising a hub, an in-hub motor, and a shifting in-hub transmission having an input attached to the motor and an output attached to the wheel for rotating the wheel with respect to the chassis. A method includes providing a shifting transmission and a motor coupled with the transmission in a hub of a wheel, providing electrical power to the motor, and rotating the motor with the electrical power. The method further includes rotating the transmission with the motor and rotating the wheel with the transmission.

Abstract: A system for replenishing a source of pressurized fluid for use in driving the wheels of a motor vehicle includes an accumulator containing fluid at relatively high pressure; a reservoir containing fluid at lower pressure; an engine driveably connected to the wheels and having a variable torque output; a pump/motor driveably connected to the wheels, including an inlet and an outlet, and having a variable volumetric displacement for pumping fluid between the accumulator and the reservoir; and a controller for determining a current cruise charge pressure limit for the accumulator, determining a desired magnitude of pump/motor torque with which to pump fluid to the accumulator, determining a desired magnitude of engine torque with which to drive the pump/motor at the desired magnitude of pump/motor torque, and controlling the engine to produce the desired magnitude of engine torque, to drive the pump/motor in a pumping mode at the desired magnitude of pump/motor torque, and to pump fluid to the accumulator from

Abstract: A running power transmission mechanism for a vehicle for transmitting drive power from a driving source to a pair of steering wheels and a pair of non-steering wheels. A main-HST outputs synchronized drive power to the steering and non-steering wheels. The non-steering wheels are driven differentially by the main-HST through a gear mechanism. A sub-HST changes the speed of the drive power inputted via a steering-wheel drive output shaft and outputs the drive power to the steering wheels. The steering wheels are driven differentially by the sub-HST through a gear mechanism.

Abstract: Dual neutral start switch configurations for preventing vehicle users from starting or activating a vehicle engine under certain circumstances and designed to be part of the control arm or return-to-neutral configuration are disclosed. These configurations may be used with pumps, transmissions or transaxles in a variety of different vehicle applications. Also disclosed is a combination neutral start switch and reverse mower blade cutoff switch.

Abstract: An articulated forklift truck for use in narrow aisles comprises a front chassis section (10) having a first pair of ground-engaging wheels (20) and a rear chassis section (12) having a second pair of ground-engaging wheels (22). The front chassis section (10) carries a mast (16) and lift forks (18) and is pivoted to the rear chassis section (12) about a substantially vertical axis (14) to allow the truck to be steered. Both front wheels (20) but only one of the rear wheels (22) are driven by electric of hydrostatic motors (24, 26).

Abstract: A hydraulic drive system includes a pair of hydraulic drive motors connected in series. Each motor includes a hydraulic circuit with a spring-biased directional control valve and a pair of check valves. The circuits are located in the end cover for each motor, and are in fluid communication with the respective motor and with each other. The circuits are responsive to the pressure differential across the motors, due to the load and direction of the vehicle, and direct flow to one wheel or the other. Flow is directed to the inside motor when accelerating and/or climbing, while the outside motor is allowed to turn freely to compensate for the different turning radius. This reverses when the vehicle is going downhill and/or decelerating, when the motors are braking. If the drive wheel loses traction, the flow and pressure shifts to the other wheel (or to both wheels), until traction is regained.

Abstract: A utility vehicle is disclosed within. The utility vehicle includes a front axle, a pair of rear axle shafts, a seat with a minimum capacity of two occupants secured to the vehicle, an engine, having an engine output shaft, mounted between the front axle and the rear axle shafts and a least partially below the seat and a load bed. The utility vehicle also includes a hydraulic pump, driven by a pump input shaft, and a hydraulic motor, which drives a plurality of gears through a motor output shaft. The engine output shaft, the pump input shaft and the motor output shaft are generally parallel to the front axle and the rear axle shafts.

Abstract: A utility vehicle is disclosed within. The utility vehicle includes a frame with a front end and a rear end, a front axle secured to the frame, a pair of rear axles secured to the frame and a seat for at least two occupants positioned between the front axle and the rear axle shafts. The utility vehicle also includes a load bed positioned over the rear axle shafts, a prime mover having an output shaft, a hydraulic pump driven by the prime mover by a belt, a gear box with a gear box input shaft, a differential driving the rear axle shafts and a hydraulic motor connected to the hydraulic pump by hydraulic lines and drivingly engaged to the gear box input shaft.

Abstract: A hydraulically driven and steered vehicle comprises a pair of axles differentially connected to each other, a traveling HST, a steering HST, a speed control operation device operative connected to a movable swash plate of the traveling HST, and a steering operation device operatively connected to a movable swash plate of the steering HST. A speed control linkage is interposed between the steering operation device and the swash plate of the steering HST. A hydraulic actuator and a hydraulic valve are connected to the steering control linkage so as to reverse the relative movement direction of the swash plate of the steering HST to the movement direction of the steering operation device depending upon the reversing of forward and backward traveling direction.

Abstract: A drive assembly for vehicles with front wheels and rear wheels, especially for tractors, agricultural machinery, construction machinery or for self-driving machines, has an engine (1), a first drive (15) to drive the rear wheels, a second drive (27) to drive the front wheels, an adjustable hydraulic pump (5) driven by the engine (1), and an adjustable first hydraulic motor (9). The first hydraulic motor (9), with respect to drive, is connected to the first drive (15) to drive the rear wheels. Also, the first hydraulic motor, with respect to drive, may be connected to the second drive (27), to drive the front wheels. A second hydraulic motor (10), with respect to drive, can be connected to the second drive (27) to drive the front wheels. The first hydraulic motor (9) has a high coefficient of efficiency within a first driving speed range of the vehicle. The second hydraulic motor (10) has a high coefficient of efficiency within a second driving speed range of the vehicle.

Abstract: A motorcycle including a frame having a backbone and engine carrier prevents the need for front support bars. The power plant is secured to the backbone and engine carrier and may be quickly removed. The power plant turns a hydraulic pump that transfers power to a hydraulic motor via hydraulic fluid. A reservoir of hydraulic fluid is preferably contained in the backbone. The hydraulic motor is contained in a swing arm and connects to one side of the rear wheel. The hydraulic motor acts as both a drive unit and a braking unit. Lights may be secured to the engine carrier to provide a better view of the road.

Abstract: A drive system for use in utility vehicles, such as agricultural forage harvesters and combines, includes a hydrostatic transmission having a pump driven by a main engine of the vehicle and having first and second motors respectively coupled to front and rear axles of the vehicle by way of first and second differential gear sets. The pump and one or both of the motors have a variable displacement determined by positioning respective swash plates through the agency of a lever, in the case of the pump, and by electronic devices, in the case of the motors, the electronic devices acting in response to control signals sent by a control arrangement, which in turn, operates in response to signals produced by pressure sensors associated with the motors and by signals produced by speed sensors associated with output shafts of the hydraulic motors.

Abstract: A skid steer vehicle is supported on four gearboxes that function both as control arms and as speed reduction gearboxes. Each side of the vehicle's chassis has two gearboxes to which it is coupled. A hydraulic motor is fixed to each side of the chassis to drive the gearboxes on that side. The motors are arranged such that their drive shafts extend longitudinally along the chassis, with a front shaft engaging the front gearbox and a rear shaft engaging the rear gearbox. The gearboxes include three speed-reducing right angle gear sets coupling an axle extending from the gearbox to the motor driving that gearbox.

Abstract: A hydraulic driving apparatus for a wheeled vehicle including a prime mover and a pair of wheels comprises a stepless transmission mechanism for traveling which transmits driving force from the prime mover to the drive wheels so as rotate the drive wheels in a common forward or rearward direction, and a steering transmission mechanism including a hydrostatic stepless transmission including a variable hydraulic pump and a hydraulic motor fluidly connected to each other, wherein a rotational force of the hydraulic motor is divided into opposite directive rotations transmitted to the respective drive wheels. A switching valve is disposed between the variable hydraulic pump and the hydraulic motor in the steering transmission mechanism.

Abstract: An axle driving apparatus wherein a hydraulic motor and a hydraulic pump for a hydro-static-transmission are housed in a transmission casing of the axle driving apparatus and a center section for connecting the hydraulic motor and hydraulic pump is disposed in the transmission casing, the center section being fixed at the butt joint portion at the transmission casing, and an oil passage from the hydraulic pump to the hydraulic motor at the center section is bent at a right angle so as to extend the motor shaft in parallel to the axles, so that the rotation direction of the motor shaft conventionally changed by bevel gears is changed by the oil passages in the center section.

Abstract: A control mechanism for a hydraulic assembly is disclosed. The control mechanism comprises a hydraulic pump, a swash plate, a control arm, a return to neutral mechanism and a cruise control arm. The control arm is linked to the swash plate and is moveable in such a manner so as to provide the swash plate with a plurality of non-discrete angular orientations with respect to the hydraulic pump. The return to neutral mechanism is used to move the control arm from a driving position to a neutral position. The cruise control arm is moveable between a first position and a second position. In the first position, the cruise control arm is disengaged from the control arm. In the second position, the cruise control arm engages the control arm to resist movement of the control arm from one of a plurality of non-discrete forward driving positions to the neutral position under the influence of the return to neutral mechanism.

Abstract: A utility vehicle is disclosed within. The utility vehicle comprises a front axle, a pair of rear axle shafts, a seat for at least two occupants positioned between the front axle and the rear axle shafts, a load bed positioned over the rear axle shafts, a prime mover with a prime mover output shaft with a pulley attached to the end of the prime mover output shaft. Further, the vehicle has a hydraulic drive system that has a hydraulic pump driven by a pump input shaft, a hydraulic motor located within a common housing with the hydraulic pump, and gears and a differential located in the common housing with the hydraulic pump and the hydraulic motor. The prime mover output shaft and the pump input shaft are parallel to the front axle and the rear axle shafts.

Abstract: A self-propelled working vehicle comprises a front wheel unit, a rear wheel unit including a left rear wheel and a right rear wheel, and a drive transmission apparatus for transmitting drive from an engine to the rear wheel unit. The drive transmission apparatus includes a first drive transmission mechanism for transmitting the drive to the left rear wheel and a second drive transmission mechanism for transmitting the drive to the right rear wheel. The first transmission mechanism is arranged at the left side of the vehicle body, while the second transmission mechanism is arranged at the right side of the vehicle body. A brake assembly is arranged between the first drive transmission mechanism and the second drive transmission mechanism for acting on an output shaft of a first transmission unit and an output shaft of a second transmission unit. The first and second transmission units act as first and second change speed devices, respectively, which are operable independently of each other.

Abstract: Control valves are respectively provided in a pair of variable displacement hydraulic pumps. If an ultra low speed travel signal is issued in response to an ultra-low-speed switch turned on, one of the control valves is fixed to a neutral position by a solenoid valve. And a displacement amount of a travel motor is fixed at a maximum displacement by another solenoid valve. In this way, an upper limit for motor rotation speed is significantly reduced. As a result, it is possible to realize the ultra low speed travel with maximum operation of an accelerator pedal, without the need for subtle operation of the accelerator pedal.

Abstract: An axle driving apparatus wherein a hydraulic motor and a hydraulic pump for a hydro-static-transmission are housed in a transmission casing of the axle driving apparatus and a center section for connecting the hydraulic motor and hydraulic pump is disposed in the transmission casing, the center section being fixed at the butt joint portion at the transmission casing, and an oil passage from the hydraulic pump to the hydraulic motor at the center section is bent at a right angle so as to extend the motor shaft in parallel to the axles, so that the rotation direction of the motor shaft conventionally changed by bevel gears is changed by the oil passages in the center section.

Abstract: An improved valve for use in a hydrostatic drive apparatus for a vehicle such as a zero turn vehicle. For each hydraulic drive system in the vehicle, a valve is located between the high and low pressure sides of the closed hydraulic circuit connecting the hydraulic pump and motor. The valve opens when the pressure rise rate in the high pressure side reaches a set level to minimize pressure spikes in the high pressure side and thus improve performance of the vehicle. A valve block may be used to mount the valve, and a second valve may also be included therein to connect the two pressure sides of the hydraulic circuit in a similar manner when the vehicle is operated in reverse.

Abstract: A hydraulic four-wheel driving apparatus is provided for a vehicle having a pair of left and right unsteerable wheels and a pair of left and right steerable wheels. The hydraulic four-wheel driving apparatus comprises: a transmission casing supporting the unsteerable wheels; a hydraulic pump disposed integrally with the transmission casing, the hydraulic pump being driven by a power source outside the transmission casing; a first hydraulic motor for driving the unsteerable wheels fluidly connected to the hydraulic pump, the first hydraulic motor being disposed integrally with the transmission casing; and a second hydraulic motor for driving the steerable wheels fluidly connected to the hydraulic pump, the second hydraulic motor being disposed integrally with the transmission casing and disposed on one side of the first hydraulic motor toward the steerable wheels.

Abstract: A cruise control system for use in connection with a control arm linked to a swash plate that is moveable to provide the swash plate with a plurality of non-discrete angular orientations to affect fluid displacement of a hydraulic pump and a return to neutral mechanism for moving the control arm from a driving position to a position in which the swash plate does not affect fluid displacement of the hydraulic pump. The cruise control system includes a cruise control arm having a portion occupying a plane in common with a portion of the control arm. The cruise control arm is moveable to place the portion of the cruise control arm into contact with the portion of the control arm to prevent the control arm from moving from one of a plurality of non-discrete forward driving positions to the neutral position under the influence of the return to neutral mechanism.

Abstract: A small or mini loader is operated by a platform standing on the ground or other surface supporting the loader, and at the rear of the machine. Hydraulic control levers operate drives on opposite sides of the machine, and the control levers are pulled rearwardly from a stopped position to effect the rearward drive. A pivoting panel is mounted on the rear of the frame and has a wall portion that protrudes outwardly from the rear of the machine. When the lower end of the pivoting panel engages an obstruction or other item that provides a force tending to move the lower end of the panel forwardly relative to the frame, an actuator arm will move to cause control levers that are in a rearward drive position to be moved to the stopped position.

Abstract: The present invention includes a control system for, or methods of controlling a wheeled work machine to accommodate desired travel control. Acceleration and deceleration inputs are provided, as is a controller for controlling hydrostatic motors to achieve desired acceleration and deceleration profiles.

Abstract: A four-wheel drive assist for electric machines includes an electric drive system for driving wheels at a non-steering end and a selectively operable hydraulic system for driving wheels at a steering end. A controller controls the operation of the drive system according to operator selection and/or by detecting slipping of the electric drive system. Preferably, at least one hydraulically driven operating arm, including boom functions, lift platform, etc., is driven by the same hydraulic pump that drives the steering end hydraulic system. The machine thus is capable of effecting four-wheel drive when necessary, while operating as efficiently as a conventional two-wheel drive full electric machine when the four-wheel drive system is not engaged.

Abstract: A driving apparatus for speed changing and steering of a vehicle consists of a first driving unit for speed changing in advancing and reversing and a second driving unit for steering, which are arranged in a longitudinal row and are attached to a vehicle chassis. Each of the first driving unit and the second driving unit has a common structure, which comprises a housing and an HST and left and right differential output shafts contained in the housing. A left first differential output shaft and a left second differential output shaft are connected with each other so as to be rotated in the same direction, and a right first differential output shaft and a right second differential output shaft are connected with each other so as to be rotated in opposite directions. Both first and second HSTs of the first driving unit and a second driving unit receives power from engine through a common single belt.

Abstract: A running power transmission mechanism includes a main-transmission device and a steering-wheel speed change device. The steering-wheel speed change device in turn includes a non-stepwise speed change unit and a planetary differential unit. Drive power from the main-transmission device is inputted into a first element of the planetary differential unit, and output of the non-stepwise speed change unit is inputted into a second element of the planetary differential unit, while steering-wheel drive power is taken off from a third element of the planetary differential unit. Also, the speed of the output of the non-stepwise speed change unit is changed according to the steering angle of the steering wheels.

Abstract: A utility vehicle incorporating a frame, a load bed mounted at the rear of the frame and front and rear axles secured to the fame, has an engine mounted to the frame between the front and rear axles, a mechanical gear box secured to the frame and a differential mounted in the gear box and engaged to and driving the rear axles. A hydraulic pump housing is secured to the frame and has a pump input shaft extending therefrom. A hydraulic motor housing is secured to the frame and hydraulically connected to the pump. A motor output shaft, driven by the hydraulic motor, extends out of the motor housing and is engaged to a gear box input shaft.

Abstract: A crawler crane having identical left and right crawler assemblies. The left and right crawler assemblies each comprise an identical crawler drive assembly to power the individual crawlers. Each crawler drive assembly comprises a hydraulic drive motor connected to the crawler. Both crawler drive assemblies utilize identical mounting configurations for connecting the hydraulic drive motor to the frame of the crawler.

Abstract: Hydraulic apparatus are provided with a right side drive including a first right side hydraulic motor operable to drive a first wheel and a second right side hydraulic motor operable to drive a second wheel. The first right side hydraulic motor is hydraulically connected in series with the second right side hydraulic motor. In addition, a left side drive is hydraulically connected in parallel with the right side drive. The left side drive includes a first left side hydraulic motor operable to drive a third wheel and a second left side hydraulic motor operable to drive a fourth wheel. The first left side hydraulic motor is hydraulically connected in series with the second left side hydraulic motor. A hydraulic pump is also in fluid communication with the right side drive and the left side drive.

Abstract: A skid steer vehicle has a drive system that includes a hydraulic motor coupled to a speed-reduction gearbox. One or more drive shafts extend fore-and-aft from the gearbox and are coupled at each end to two axle housings. Each axle housing includes two reduction gear sets and an axle. Each of the axles extends outward from the vehicle and a wheel is fixed to its outer end. A spur gear on a parallel shaft inside the axle housing engages a spur gear on the axle and drives it to provide one gear reduction. A bevel gear in the axle housing engages a bevel gear on the parallel shaft to provide another gear reduction. The vehicle has a drive system located on each side of the vehicle to collectively drive four wheels.

Abstract: The invention provides a hydraulically driven vehicle which can reduce a tire slip on a low friction road surface such as a soft road surface, an oversnow road surface or the like and has an excellent work ability in a narrow space. The invention relates to a hydraulically driven vehicle having a hydraulic motor (2) driven by a pressure oil discharged from a hydraulic pump (1) and supplied to the hydraulic motor (2), and traveling by driving the hydraulic motor (2). A maximum driving force of the hydraulic motor (2) is set changeable. The hydraulic motor (2) is a variable displacement hydraulic motor. A maximum driving force is adjusted by electrically controlling a maximum tilt angle of the hydraulic motor (2). A minimum displacement value of the hydraulic motor (2) can be changed by electrically controlling a minimum tilt angle of the hydraulic motor (2).

Abstract: An electronic anti-skid device for motor vehicles with hydrostatic transmission has at least one sensor for the transmission of data pertaining to the output of the hydrostatic transmission, a steering angle detector and an electronic computer. The electronic computer uses data from the sensor to calculate theoretical power output of the hydraulic motors of the driver wheels of the vehicles and, thus, the theoretical speed of the wheels. The electronic computer is programmed to scan the detectors at very rapid intervals, and to adjust, on each scan, hydraulic output from output regulators. The output regulators have electrical controllers and are coupled to each hydraulic motor of a driven wheel way as to limit the power from each regulator to a value marginally above the theoretical output for the motor of the wheel to which the power regulator is connected.

Abstract: A skid steer vehicle has a drive system that includes hydraulic motor coupled to a reduction gearbox. A driveshaft extends fore-and-aft from the gearbox and is coupled at each end to a combined housing including a reduction gear set and an axle. The axle extends laterally outward from the vehicle and a wheel is fixed to its outer end. There are two housings on either end of the driveshaft. There are two such drive systems on the vehicle, one on either side. Thus the vehicle has two separate drive systems, each capable of independently driving two wheels on opposing sides of the vehicle.

Abstract: A differential rotation control apparatus for a vehicle having a differential, left and right output shafts of the differential, and left and right axle shafts, comprises variable displacement type left and right hydraulic pumps driveably provided between the left and right output shafts and the left and right axle shafts, a first hydraulic passage interposed between a discharge port of the left hydraulic pump and a suction port of the right hydraulic pump, a second hydraulic passage interposed between a discharge port of the right hydraulic pump and a suction port of the left hydraulic pump, and a controller for calculating a displacement ratio between the left and right hydraulic pumps based on a target turning radius and for controlling a rotation speed ratio between the left and right axle shafts so as to coincide with the calculated displacement ratio.

Abstract: A skid steer vehicle is supported on four gearboxes that function both as control arms and as speed reduction gearboxes. Each side of the vehicle's chassis has two gearboxes to which it is coupled. A hydraulic motor is fixed to each side of the chassis to drive the gearboxes on that side. The motors are arranged such that their drive shafts extend longitudinally along the chassis, with a front shaft engaging the front gearbox and a rear shaft engaging the rear gearbox. The gearboxes include three speed-reducing right angle gear sets coupling an axle extending from the gearbox to the motor driving that gearbox.

Abstract: A forklift truck steerable along at least two opposite directions of travel by a hydraulic circuit includes at least one hydraulic cylinder (22) coupled to at least one steerable ground-engaging wheel (18) and a driver's steering wheel (20) for controlling the supply of hydraulic fluid under pressure selectively to the full bore or piston rod side of the cylinder. The hydraulic circuit also includes a diverter valve (32) which is switched over when the truck is driven in one of the two directions to cause the truck to steer in the same direction as the steering wheel is turned in whichever of the opposite directions the truck is travelling.

Abstract: A vehicle driving arrangement with at least two axes, each having at least one driven wheel that can be acted upon with a torque of a motor, the motor/motors of each axis being arranged in a supply line, the supply lines being parallel to each other and connected with a pump device, and a valve arrangement being arranged in at least one supply line. It is desired to improve the operability of a hydraulically driven vehicle. For this purpose, the valve arrangement in one supply line has a pressure reducing valve that limits the pressure difference over the other supply line to a maximum value.

Abstract: A vehicle is installed with an integral transaxle apparatus constructed so that a single housing contains left and right axles, a driving hydrostatic transmission (HST) having a variable displacement first hydraulic pump and a first hydraulic motor fluidly connected with each other, a steering HST having a variable displacement second hydraulic pump and a variable displacement second hydraulic motor fluidly connected with each other, and a differential unit differentially connecting the axles with each other so as to be driven regularly or reversely by the output of the driving HST and to differentially drive the axles while receiving the output of the steering HST, wherein the first hydraulic pump receives power of a prime mover and has a first movable swash plate, and the second hydraulic pump receives power of the prime mover independently of the first hydraulic pump and has a second movable swash plate.

Abstract: A frameless type working vehicle includes an intermediate vehicle body 5 acting as a body forming member for interconnecting a front vehicle body 3 and a rear vehicle body 4. The intermediate vehicle body is formed of a case block 10 housing a hydrostatic stepless transmission (HST) 20. The case block 10 includes, formed integral with one another, a small diameter portion 11 connected to the rear vehicle body 4 and providing case walls for a pump P and a motor M of HST 20, a large diameter portion 12 connected to the front vehicle body 3 and having an upper edge at a higher level than an upper surface of the small diameter portion 11, and a transitional portion 12A disposed between the small diameter portion 11 and the large diameter portion 12. The large diameter portion 12 defines an accommodating space S1 for a main clutch 9 that receives drive from an engine E.

Abstract: Hydraulically driven apparatus where the rotation of a ground contact wheel (3) automatically rotates a second device requiring drive (5) via a circuit (15, 16) and hydraulic motors (4,6) attached to the wheel (3) and second device (5), respectevely. The apparatus can be used in many applications including in one embodiment used as a transmission system to drive a rotary broom (5) of a sweeping apparatus.

Abstract: A drive system for a utility vehicle (10) containing a motor (12) that is connected to and drives a hydraulic pump (14) which, in turn, is connected to a hydraulic motor (16). The hydraulic motor drives a ground engaging element through a gearbox having different selectable gears. A speed-adjustment device (26, 122) cooperates with the hydraulic pump (14) and/or the hydraulic motor (16) to adjust the rotational speed of the hydraulic motor (16). In order to make available the full rotational speed range of the hydraulic motor (16) in the lower gears while ensuring the observation of the maximum permissible speed in the highest gear, the invention provides a control device to limit the rotational speed of the hydraulic motor (16) to a predetermined value if the highest gear(s) of the gearbox (18) is selected.

Abstract: An integrated wheel hub assembly includes a hydrostatic spindle assembly that has a spindle with a hydrostatic rotational power unit and integral high-pressure passageways therein, a wheel hub rotatably supported by the spindle assembly, and an axle shaft extending through the spindle for transmitting power from the hydrostatic unit to the wheel hub through a planetary gear set reducer. For radial compactness, the swashplate of the hydrostatic power unit resides outside the wheel hub.