B - Operations – Transporting – 60 – D
Patent
B - Operations, Transporting
60
D
280/129
B60D 1/00 (2006.01) B62D 53/00 (2006.01) B62D 53/08 (2006.01) B62D 63/06 (2006.01)
Patent
CA 1051479
ABSTRACT OF THE DISCLOSURE A semi-trailer is connected to an agricultural-type tractor by means of a coupling dolly. The coupling dolly has a chassis which is supported by wheels at tis rear end and is connected to a weight transfer hitch at its front end. The semi-trailer is connected to the dolly by means of a universal coupling supported between the ends of the dolly chassis and having mutually intersecting rearwardly disposed pitching, rolling and yawing axes. The weight transfer hitch is pivotally connected to the tractor for articulation about a horizontal pitching axis extending transversely of the tractor, between the axes of the front and rear wheels of the tractor and below the level of the axis of the rear wheels of the tractor. The weight transfer hitch also has bearing means, disposed to the rear of the horizontal forwardly disposed pitching axis, for accommodating rolling and yawing articulation between the dolly and the tractor, the bearing means provided for yawing articulation being disposed on an axis which passes through the bearing means provided for rolling articulation. The coupling dolly is therefore capable of relieving the rear axle of the tractor of part of the loading of the semi-trailer while providing rolling stability for the semi-trailer and enables the connection between the semi-trailer and the tractor to be effected by means of a smaller weight transfer hitch than would otherwise be possible.
261081
F.w. Pettit (developments) Limited
Greatbatch Robert J.
LandOfFree
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