B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
B62D 53/04 (2006.01) B62D 53/00 (2006.01) B62D 53/08 (2006.01)
Patent
CA 2241385
A long wheel base automotive tractor unit cooperates with a new semi-trailer unit to form a rigidly-coupled tractor/semi-trailer combination. The tractor fifth wheel assembly is mounted for extended longitudinal movement, while the semi-trailer has a retractable landing gear movable between a forward position close to the king pin to support the semi-trailer front end without the tractor, and a rear position close to the running wheels so that the semi-trailer can rest on the tractor and be rigidly coupled thereto. The tractor and semi-trailer chassis frames cooperate to permit pitching while preventing yaw. Preferably the tractor wheel base is of length from 6.8 metres (22 feet) to 8.5 metres (28 feet), while the fifth wheel assembly is mounted for a longitudinal movement of from 4.8 metres (16 feet) to 6.2 metres (20 feet). The fifth wheel assembly may be movable by relative movement between the two units, or by a motor. The retractable landing gear may comprise a hand and/or motor-operated drive.
Curry N. Royce
Na
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