Abstract: Reciprocal attitude angle self-differentiating device (10) for pivotable wheels (11,12;110) of handtrucks, each of the wheels (11,12;110) being respectively rotatably mounted about a substantially horizontal axis (22,23;220) belonging to a wheel supporting body (21,15;210), the body (21,15;210) being rotatably mounted about a substantially vertical axis (29,30;290), in which at least one pair of wheels belonging to the handtruck being mutually coupled by means of a device (10) comprising:a) a first coupling mechanism (14), cooperating with the supporting body (15) of the first (12) of the wheels belonging to the pair;b) a second coupling mechanism (13,25;130,250) freely movable mounted on the supporting body (21;210) of the second wheel (11;10) belonging to the pair of wheels, the second mechanism (13,25;130,250) cooperating with a third mechanism (16,24;240) integral and rigidly connected with the supporting body (21;210) of the second wheel (11;110);c) a fourth, motion transmitting, mechanism (20), cooperat

Abstract: An all-wheel steered vehicle in which all wheels are always parallel and have an equal role in steering the vehicle. It consists of a plurality of wheel assemblies capable of wheel rotation about the wheel's axis and wheel assembly rotation about the wheel's vertical axis. These wheel assemblies are fixed normally to (at right angles to) and evenly spaced around a circle on the chassis (17). These wheel assemblies are attached to a common linkage (18) which maintains the wheels in parallel, but allow the wheel assemblies to rotate simultaneously about their vertical axes. The cab (21) of this vehicle is rotatable about the center of the circular chassis in a plane parallel to the chassis. The cab is in linkage with the wheel assembly's linkage such that a rotation of the cab relative to the chassis causes a simultaneous and equal rotation of all of the wheel assemblies about their vertical axis. That is, both the cab and all of the wheels are maintained parallel to one another.

Abstract: A steering mechanism for improving the turning radius of a tractor is disclosed wherein the wheels are turned relative to the steering axle simultaneously with a pivotal movement of the steering axle relative to the chassis of the tractor. A connecting link interconnects the pivot mechanism pivotally supporting the steering axle relative to the chassis with the steering mechanism such that a manipulation of the steering mechanism to affect a turning of the wheels affects a pivotal movement of the steering axle in the same direction the wheels are being turned. The pivot mechanism allows for pivotal movement of the steering axle about longitudinally extending horizontal axis in addition to the pivotal movement of the steering axle about a generally vertical axis relative to the chassis.

Abstract: Method and apparatus for reduced radius turning for large cranes mounted on curved sections of rails or track which is effected by lifting the outboard sets of wheels of the crane supporting bogies which are located at the corners of the cranes disposed over the rails having the shortest radius of curvature on the inside of the turn and then lowering the bogies when the crane is on a straight section of track.

Abstract: A steering mechanism for improving the turning radius of a tractor is disclosed wherein the wheels are turned relative to the steering axle simultaneously with a pivotal movement of the steering axle relative to the chassis of the tractor. A connecting link interconnects the pivot mechanism pivotally supporting the steering axle relative to the chassis with the steering mechanism such that a manipulation of the steering mechanism to affect a turning of the wheels affects a pivotal movement of the steering axle in the same direction the wheels are being turned. The pivot mechanism allows for pivotal movement of the steering axle about longitudinally extending horizontal axis in addition to the pivotal movement of the steering axle about a generally vertical axis relative to the chassis.

Abstract: A multiple wheel steering mechanism is disclosed, wherein a single front wheel by way of example is steerable directly and carries a sideways extending lever, connected by means of a rod to a lateral extension of an intermediate lever in the rear, the connection runs obliquely to the longitudinal axis of the vehicle and the intermediate lever and through steering rods and a lever mechanism is connected to individual journal mounts and bearing for the rear wheels, steering them in unison about separate vertical axes.

Abstract: A hydrostatic all wheel drive system for an articulated vehicle, which system due to its special arrangement is also able to steer the vehicle. The hydraulic system includes two powered hydraulic pumps variable as to their output capacity and flow directions. The hydraulic motors powering the front right-side wheel and the rear left-side wheel, respectively are connected via a closed hydraulic circuit in parallel relation to one of the hydraulic pumps, and the motors powering the front left-side wheel and the rear right-side wheel, respectively are connected via a second hydraulic circuit in parallel relation to the other of the hydraulic pumps. The vehicle can be steered by changing the flow rate and/or flow direction in one of the two hydraulic circuits in respect to the corresponding parameters of the other circuit.

Abstract: Steering apparatus for a trailer vehicle is disclosed providing preselected turning characteristics for the vehicle. A pair of wheel assemblies are mounted at the front of the vehicle and are each pivotal about an associated vertical axis. A tie member having a plate with a longitudinal slot formed therein extends between and connects the front wheel assemblies to provide for the simultaneous pivoting of the front wheel assemblies. A tow bar is pivotally connected to the vehicle between the front wheel assemblies and is provided with a pin that extends into the slot in the plate. During pivoting, the pin is displaced both transversely and longitudinally of the vehicle, but since the pin slides in the slot only the transverse component of displacement of the tow bar is transferred to the tie member.