Trenching system for earth surface use, as on paved streets, roa

Details Trenching system for earth surface use, as on paved streets, roa Trenching system for earth surface use, as on paved streets, roa

1994-06-02

1996-02-13

Raduazo, Henry E.

Excavating

Ditcher

Wheel excavator

37 91, 299 392, 299 64, E02F 508

Patent

active

054903394

ABSTRACT:
The present invention relates to a center-line trenching system for use at the earth's surface such as on a paved street, road, highway or the like. The system includes a rubber tired drive machine movable over the earth's surface for advancing a side-by-side tandem of a earth saw and a conveyor attached to a rear surface of the drive machine. The conveyor includes a subframe and an elongated main frame. The subframe comprises a pair of longitudinally extending truss members pivotly attached to the drive machine at a first pivot axis of rotation that is fixed in elevation relative to the earth's surface. The main frame includes a pair of rail members pivotally mounted at near end regions to the truss members at a second axis of rotation, and has trailing end regions that define the remote termini of the conveyor. A hydrostatic actuator is pivotally mounted between the subframe and the main frame. An on-site wheel subassembly pivotally attached to the subframe having a pair of swivel wheels in rolling contact with the earth's surface during an active state of the conveyor and in an up-folded position well above the earth's surface during a trailering state of the conveyor, completes the assembly. Mounted to the rail members of the main frame is a pair of rubber tired, trailering wheels for the purpose of trailering the conveyer to a job site during the trailering state of use of the conveyor but positionable above the earth's surface during the active state of the conveyor.

REFERENCES:
patent: 4069605 (1978-01-01), Satterwhite
patent: 4193636 (1980-03-01), Jakob
patent: 4678236 (1987-07-01), Wirtgen
patent: 5009548 (1991-04-01), Falbo et al.
patent: 5078540 (1991-06-01), Jakob et al.
patent: 5219380 (1993-06-01), Young et al.
patent: 5315770 (1994-05-01), Campbell

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