Earth-based vehicle

Inactive Publication Date: 2001-03-20
LANSBERRY TRACTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The wheels are constructed and arranged to be moved with respect to the main frame structure so as to change a position thereof with respect to the main frame structure, thereby permitting driving, steering and ground pressure of the vehicle to be adjusted in accordance with ground conditions.

Problems solved by technology

These conventional vehicles, although capable of moving over terrain having a variety of soil conditions, may often get stuck, since all of the tractive forces and propelling surfaces are not always put to the ground.
Recently, environmental concerns have been raised due to the disruption of the earth's crust by use of the conventional loader / dozer type vehicles.
For example, in the tree harvesting industry, construction industry and / or the agricultural industry, the operation of vehicles of the type described may cause significant damage to the earth's crust.
Damage can occur by the formation of ruts or by causing soil erosion.

Method used

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  • Earth-based vehicle
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Examples

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Embodiment Construction

Referring to the drawings, an earth-based carrier vehicle is shown generally indicated at 10, which embodies the principles of the present invention.

The vehicle 10 includes a main frame structure, generally indicated at 12, in the form of a vehicle chassis, having fore and aft ends, 14 and 16, respectively. In the illustrated embodiment, an operator compartment 18 is mounted to the fore end 14 of the frame structure 12, while a winch or other attachment assembly, generally indicated at 20, is mounted to the aft end 16.

In accordance with the principles of the present invention, the vehicle 10 includes a track assembly, generally indicated at 22, mounted to the frame structure 12. The track assembly 22 may comprise one or more endless track belt units. In the illustrated embodiment, the track assembly 22 is in the form of a single, centrally mounted track unit having a conventional ground-engaging endless track or belt 26 extending in the longitudinal direction. The track assembly 22 ...

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Abstract

A vehicle is provided including a main frame structure, a track assembly mounted to the main frame structure and having a single, endless ground-engaging track extending in a longitudinal direction. A pair of steerable ground-engaging wheels flank the track, constructed and arranged to exert a ground bearing pressure sufficient to change a direction of travel of the track in response to turning of the wheels to steer the vehicle. Steering structure is operatively associated with the wheels to turn the wheels. Power drive structure is mounted with respect to the main frame structure and is constructed and arranged to drive the wheels and the track simultaneously so as to move the vehicle along the ground. The wheels are constructed and arranged to be moved with respect to the main frame structure so as to change a position thereof with respect to the main frame structure, thereby permitting driving, steering and ground pressure of the vehicle to be adjusted in accordance with ground conditions.

Description

.Iadd.Further reissue of this patent is sought in a continuing reissue application, Ser. No. 09 / 577,261, filed May 22, 2000..Iaddend.BACKGROUND OF THE INVENTIONThe present invention relates to vehicles and, more particularly, to an earth-based carrier vehicle which is constructed and arranged to put all tractive forces to the ground, thereby permitting the vehicle to negotiate terrain having a variety of soil conditions.Conventional vehicles such as loaders and / or bulldozers are usually driven by tracks or by wheels. Typical track vehicles employ a pair of spaced steel or rubber endless tracks which are driven to move the vehicle over the ground. Wheeled vehicles typically include a pair of front wheels and a pair of rear wheels which are driven to propel the vehicle. The wheels are generally large and have tread designs which aid in moving the vehicle over sand, clay and mud. These conventional vehicles, although capable of moving over terrain having a variety of soil conditions, m...

Claims

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Application Information

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IPC IPC(8): B62D55/00B62D49/00B62D9/00B62D49/06B62D55/02E02F9/02
CPCB62D9/00B62D49/0635B62D55/02
InventorLANSBERRY, JOHN B.
OwnerLANSBERRY TRACTOR