Motor vehicles – Special driving device – Portable track
Patent
1990-07-19
1991-11-05
Reese, Randolph A.
Motor vehicles
Special driving device
Portable track
180 954, 37224, B62D 5530
Patent
active
050624938
ABSTRACT:
A tracked vehicle is described for travel along a terrain and in particular one for the preparation of ski slopes. The vehicle comprises a self-bearing chassis, a plurality of running bearing wheels fixed in a rotating manner on horizontal axles at each longitudinal side of the chassis, a drive wheel fixed in a rotating manner on a horizontal axle at one of the ends of each longitudinal side of the chassis and, a track tightening wheel fixed to a horizontal axle at the other end of each longitudinal side of the chassis downstream of the last bearing wheel. At least one of the rear bearing wheels is supported by the chassis with its axle movable in the vertical plane containing it, there being provided linkages for moving the wheel from a lowered position, in which part of the track running thereon is in contact with a longer portion of the underlying terrain, to a position wherein part of the track is raised from the terrain.
REFERENCES:
patent: 3386778 (1968-06-01), Rymes
patent: 3692132 (1972-09-01), Pollanen
patent: 4087135 (1978-05-01), Unruh
patent: 4458954 (1984-07-01), Haas
patent: 4458955 (1984-07-01), Webb
patent: 4500139 (1985-02-01), Tucek
patent: 4516649 (1985-05-01), Braathen
Platter Helmuth
Webhofer Artur
De Liguori Franco S.
Leitner S.p.A.
Reese Randolph A.
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