Tractor

Motor vehicles – Having at least one wheel both driven and steerable – Steerable wheel has exclusive axis of pivot

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Details

180156, 180900, B62D 510, B60K 1730

Patent

active

045910189

ABSTRACT:
A tractor comprising driven front and rear wheels, and a front and rear lifting device. The front wheels are in sets of two wheels mounted on king pins so as to be steerable through an angle of one hundred, twenty-five degrees or more. A divided track rod is connected to the king pins for steering purposes. The track rod has two parts, each centrally pivotally connected to a centrally pivoted lever and outwardly pivoted by a lever to a corresponding king pin. The latter levers extend forward and the track rods are pivoted to the central lever at a location to the rear of a plane containing the king pins. Shafts connected to the tractor's engine for turning the forward wheels extend through the king pins. The king pins are inclined upwardly to the rear and can turn each front set of wheels transverse to the straight-ahead direction of travel sufficiently to permit removal of the then foremost wheel.

REFERENCES:
patent: 2400505 (1946-05-01), Hedglen
patent: 2657093 (1953-10-01), Kucera
patent: 2787030 (1957-04-01), Williams
patent: 3672460 (1972-06-01), Takata
patent: 3689101 (1972-09-01), Spence
patent: 3704040 (1972-11-01), Davis et al.
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patent: 4131170 (1978-12-01), van der Lely
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patent: 4225151 (1980-09-01), Taute et al.
patent: 4258818 (1981-03-01), Uzu
patent: 4368797 (1983-01-01), van der Lely
patent: 4403671 (1983-09-01), Schmahl
Auto Mechanics Fundamentals, Stockel, The Goodheart-Willcox Co., Inc., 1969.

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