Patent ID: 8430209

Claim:
An articulated vehicle ( 10 ) comprising: a rear section ( 12 ) and a front section ( 40 ) mounted to the rear section ( 12 ) by means of a vertically extending pivot ( 42 ), the front section ( 40 ) having one of more front wheels ( 50 ) mounted for pivotal movement in a horizontal plane, a first sprocket ( 90 ) being mounted on a vertical axis for movement with the front section ( 40 ), the vertical axis of the first sprocket ( 90 ) being offset from an axis of the vertically extending pivot ( 42 ) between the front section and the rear sections ( 12 , 40 ), a means ( 80 ) for transmitting angular movement at a ratio of 1:1 and in the same direction, from the one or more front wheels ( 50 ) to the first sprocket ( 90 ), a second sprocket ( 92 ) mounted on the rear section ( 12 ) of the vehicle coaxially of the axis of the vertically extending pivot ( 42 ) between the front and the rear sections ( 12 , 40 ), the second sprocket ( 92 ) being drivingly connected to a rotary sensor ( 100 ), the first and the second sprockets ( 90 , 92 ) being drivingly connected by means of a chain ( 96 ), and the first and the second sprockets ( 90 , 92 ) having a drive ratio of 1:1.