A WHEELED VEHICLE AND A CASTORABLE WHEEL.

摘要

The invention provides a wheeled vehicle having a front end, a rear end and a longitudinal axis. At least one castored front wheel arrangement (10) is arranged at or adjacent the front end of the wheeled vehicle and at least one castored rear wheel arrangement is arranged at or adjacent the rear end of the wheeled vehicle. Means (22; 26) are provided for bringing the plane of the or each wheel (12) of the at least one front wheel arrangement (10) into parallel alignment with the longitudinal axis on forward or rearward movement of the wheeled vehicle. The invention also provides a castorable wheel arrangement for attachment to the frame of a wheeled vehicle having a longitudinal axis. The arrangement incorporates at least one wheel (12) and means (22, 26) for, in use, bringing the plane of the wheel or wheels (12) into parallel alignment with the longitudinal axis of the wheeled vehicle on forward or rearward movement of the wheeled vehicle.