A vehicle having a steerable wheel has a mechanism for retracting the wheel into a compartment in the vehicle.

A swivel wheel device (Fig. 1) is disclosed, designed to be mounted underneath a load bearing surface (21).

Each steerable wheel is driven by a reversible motor, and is steerable so that when one wheel is turned in one direction the other is turned in an opposite direction.

An element such as an orientable wheel (5) is mounted at the front of the central beam (1).

The displacement of the working rod (70) is transmitted onto the steerable wheel via a part of the steering gear, thereby steering the wheel.

The steerable wheel (14, 114) and the second drive unit wheel (16, 116) are located within the drive unit (8, 108) on either side of the pivot (10, 110).

The pivot mountings (110, 68) allow the steerable vehicle (10).

Method and apparatus are disclosed for determining the caster angle and the steering angle inclination of a steerable wheel on a vehicle.

The invention relates to an independent suspension for a steerable wheel of a mining vehicle and to a suspension unit.

Toe angles and camber angles during the turning of the steerable wheel from the first position to the second position are measured.

Depending on whether an operator is located within or outside operator' s compartment the steerable wheel can be moved to the different corresponding angular ranges.

The output electrical signals are combinable (160) to provide a signal representative of the magnitude of steering movements of the steerable wheel (47).

A steerable wheel assembly for a vehicle comprises a mounting bracket (1) incorporating a vertical pivot mounting (2) for attachment to the vehicle.

the invention relates to an automotive steering system with a variable transmission ratio for a vehicle which is provided with at least one steerable wheel.

The castor assembly further includes a threaded vertical shaft (50) with a round member (60) (e.g., a swivel wheel or sphere) attached to the lower end of the vertical shaft.