Motor vehicles – Special driving device – Portable track
Patent
1999-04-16
2000-04-04
Johnson, Brian L.
Motor vehicles
Special driving device
Portable track
180 938, 180 648, B62D 5502
Patent
active
060449217
ABSTRACT:
A vehicle with a driving track assembly and a pair of secondary driving assemblies disposed on opposing lateral sides of the track. Each secondary driving structure includes a ground engaging driving structure that is preferably a ground engaging wheel. The driving track assembly includes an endless ground engaging track that drives the vehicle. The flanking driving structures also engage the ground and are rotated to impart force to the vehicle. A steering device is operatively connected to the secondary driving assemblies. The steering device control operation of the secondary driving assemblies so as to affect a vehicle steering operation wherein the ground engaging driving structures are operated to turn said vehicle with respect to said vehicle driving direction. Preferably, the force imparted to the vehicle by one of said ground engaging driving structures is greater than the force imparted to the vehicle by the other of the ground engaging driving structures, thereby causing the vehicle to turn with respect to the vehicle driving direction.
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Johnson Brian L.
Lerner Avraham H.
Tract-A-Pillar Tractor Co., Inc.
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