Land vehicles – Wheeled – Running gear
Patent
1981-03-26
1983-08-16
Bertsch, Richard A.
Land vehicles
Wheeled
Running gear
280 80B, B62D 5308, B62D 2100
Patent
active
043987389
ABSTRACT:
A semi-trailer construction including forward coupling structure for universal coupling and support from a towing vehicle, a rear portion from which wheeled running gear is supported and an intermediate portion dependingly supporting supplemental wheeled running gear is provided. The supplemental wheeled running gear includes a mounting plate supported beneath the semi-trailer frame for oscillation relative thereto about a vertical axis and horizontal shifting relative to the frame along a predetermined path extending through the axis of oscillation of the mounting plate relative to the frame. The mounting plate supports a transverse axle assembly therefrom having support wheels journaled thereon and the axle assembly is disposed generally normal to the aforementioned path. The mounting plate may be shifted along the path between first and second limit positions with a vertical plane containing the axis of rotation of the support wheels and disposed normal to the aforementioned path disposed on opposite sides of the axis of oscillation of the mounting plate relative to the trailer frame. Further, the axle assembly is supported from the mounting plate for guided vertical movement relative thereto and is yieldingly biased downwardly relative to the mounting plate and may be selectively upwardly retracted relative to the mounting plate.
REFERENCES:
patent: 2748879 (1956-06-01), Bailey
patent: 3063732 (1962-11-01), Harbers et al.
patent: 3395929 (1968-08-01), Hoye
patent: 3502345 (1970-03-01), Hulverson
patent: 3860257 (1975-01-01), Mesly
patent: 3912293 (1975-10-01), Harbers
patent: 4162082 (1979-07-01), Curry
patent: 4365820 (1982-12-01), Rush
Bertsch Richard A.
Jacibson Harvey B.
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