Abstract: A pump impeller (4) of a torque converter (2) is connected to an internal combustion engine (1) of a forklift truck and an automatic transmission (3) is connected to a turbine runner (5) of the torque converter (2) so as to drive wheels (17). A cargo-handling pump (40) which drives a forklift (48) is arranged to be driven using a rotational torque of the turbine runner (5), thereby varying discharge flow rate characteristics of the cargo-handling pump (40) according to a work load of the forklift (48) and a rotation speed of the internal combustion engine (1).

Abstract: In a vehicle wherein the output of an engine is transmitted to an output shaft via a torque converter and clutches, for forward/reverse change-over, a control device is provided which can control a creep phenomenon. The control device comprises a change-over valve provided in a circuit for supplying the pressurized fluid to the clutches, and the pressure control valve which controls the fluid pressure to the clutches. When the accelerator pedal is not depressed, the pressure control valve is controlled to make the vehicle speed lie within a predetermined target speed range.

Abstract: An axle 1 is supported free to swing and displace in the left and right direction by a long hole 7 and swing axis 5 relative to a vehicle frame 6. The lower end is connected to the axle 1 so that it is free to displace in the left and right directions of the vehicle, and the vehicle frame 6 and axle 1 are connected by a control link 20. The control link 20 comprises an inclined first link 25 which connects the vehicle frame 6 and axle 1, a second link 30 which connects an intermediate point of the first link 25 and the axle 1, and a third link 36 which connects the connecting point of the first link 25 on the axle 1 side and a supporting member formed in one piece with the vehicle frame 6. The control link 20 varies the inclination angle of the first link 25 according to the relative displacement to lateral directions of the axle 1 and vehicle frame 6, and thereby controls the posture of the vehicle.

Abstract: In a vehicle wherein the output of an engine is transmitted to an output shaft via a torque converter and clutches, for forward/reverse change-over, a control device is provided which can control a creep phenomenon.

Abstract: A lift truck comprises a roller rotatable at a rate substantially proportional to a ground vehicle speed and a hydraulic regulator operated by the roller to discharge hydraulic fluid at a rate substantially proportional to the ground vehicle speed. An actuator for a push-pull mechanism with a face plate is operated on the hydraulic fluid generated by the hydraulic regulator so that the face plate can displace in synchronized with the ground vehicle speed.

Abstract: A steering system with a kickback control arrangement is disclosed which is particularly suitable for an industrial vehicle such as a forklift truck with a dirigible rear wheel or wheels. A steering force transmitting system is operatively disposed between a manual steering handle and a dirigible wheel whereby the dirigible wheel is steered by the manual steering handle. This steering force transmitting system includes a force transmitting part, such as a steering shaft assembly and/or a pinion assembly, which has one end subjected to a steering force (a steering torque) manually imposed on the manual steering handle and an opposite end subjected to an external force (a kickback) imposed on the dirgible wheel. A torque sensor and a rotation sensor are arranged on the force transmitting part and a brake is arranged as to decelerate the manual steering handle when a kickback is detected based on the outputs of the sensors.

Abstract: A full hydraulic power steering system for a forklift truck or the like is disclosed which employes a hydraulically operated cylinder for turning a steerable wheel of the vehicle with increased power in response to turning of a steering wheel and control means for making a position compensation of the steering wheel in accordance with a change in the relationship between the directional position assumed by the steering wheel and that assumed by the steerable wheel. When the turning speed of the steering wheel is relatively low, the position compensation of the steering wheel is not carried out irrespective of degree of the change in the relationship.

Abstract: A full hydraulic power steering system for a forklift truck is disclosed wherein in order to correct the position of a steering wheel in relation to an actuator for a steered wheel, hydraulic fluid is discharged from a portion of hydraulic fluid line means interconnecting a steering unit operable by the steering wheel and the actuator.

Abstract: A steering mechanism for a use in a conveying and hoisting wheel vehicle having at least one steered vehicle wheel, comprises: a steering shaft; a first wheel rotatably driven by the steering shaft; a second wheel pivoting and steering the steered vehicle wheel and having a center axis of rotation extending on the equatorial plane of the steered vehicle wheel; torque transmitting means passed between the first and second wheels, the torque transmitting means having a travelling path having a meeting point at which the torque transmitting means is brought into tangential engagement with the second wheel and a parting point at which the torque transmitting means is brought out of engagement with the second wheel, the travelling path having a semi-circular turning portion at which the torque transmitting means is engaged with the circumferential section of the second wheel.