| 摘要 |
An improved steering mechanism for a tractor driven plural wheeled extendable trailer wherein the motive force for steering the trailer positively extends from the fifth wheel of the tractor in the form of tie members which are changeable in length to one or more turntables supporting assemblies structurally associated with one or several steerable axle assemblies supporting the trailer with means being provided for varying and limiting the degree of turning movement of each turntable assembly to maintain all of the steerable axle assemblies in proper steering relation to the tractor substantially regardless of the operating length of the trailer. Further means are provided on at least one of the turntables which prevents the turntable from turning or if turned causes the turntable to return to the straight tracking position. Mechanism associated with such further means may be actuated upon actuation of the trailer and/or tractor brakes.
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