Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1987-05-20
1988-07-05
Pekar, John A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
280 9, B62M 2702, B62B 1318, B62B 1900
Patent
active
047548320
ABSTRACT:
A single ski is disclosed for central mounting under a four wheel vehicle, preferably a vehicle having four wheel drive. This single ski is mounted to the underside of the vehicle and includes a jacking mechanism for raising and lowering the ski in parallel relation with respect to the snow covered ground. The single ski extends longitudinally of the vehicle, centrally between the wheels on the left side of the vehicle and the wheels on the right side of the vehicle. The length and width of the ski is sufficient to remove substantially equal weight from both the front and rear tires of the vehicle. The surface area of the ski is sufficient to maintain the depth of the ski at a level no lower than the lowest point of the tires in soft or powder snow. In operation, the ski is lowered a sufficient distance to remove weight evenly from the wheels of the vehicle to an extent that the tires no longer accumulate a blocking drift of snow in their path of advance. Thereafter, the driving wheels provide propulsion and some support while the ski provides the requisite lubrication for firm, safe and stable support over the snow. The tires of the vehicle co-act with the single ski to produce driving and steering outriggers to prevent capsizing of the vehicle. Provision for steering of the vehicle is made either by conventional steering of the front steering wheels or alternately by providing for articulation of the vehicle supported ski responsive to vehicle steering.
REFERENCES:
patent: 1314666 (1919-09-01), Horner
patent: 1454105 (1923-05-01), Coffey et al.
patent: 3132873 (1964-05-01), Sychowski et al.
Allen John W.
Banghart Douglas D.
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