Pipeline padding system

Details Pipeline padding system Pipeline padding system

1989-08-11

1990-09-11

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

By means advancing along terrain and guiding pipe or cable...

371425, E02F 522

Patent

active

049557564

ABSTRACT:
Backfilling apparatus adapted to be moved along a trench by a tractor includes a chassis, a hitch attachable to the chassis on either side, hydraulic cylinder for varying the attitude of the chassis to the hitch, a hopper mounted on the chassis to receive backfilling material, a variable speed conveyor carrying backfilling material from the hopper to an elevated position, a shredder accepting material from the conveyor, an inclined vibrating screen receiving shredded material and discharging padding fill onto the pipe in the trench and oversize material onto the padding fill in the trench. A grizzly at the hopper mouth can be positioned to discharge large masses of fill on either side or the rear of the chassis.

REFERENCES:
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patent: 3670972 (1972-06-01), Quinn
patent: 3701422 (1972-10-01), Downey
patent: 3704834 (1972-12-01), Nilsson et al.
patent: 3874182 (1975-04-01), Potter et al.
patent: 4530403 (1985-07-01), Theurer et al.
patent: 4633602 (1987-01-01), Layh et al.
patent: 4635664 (1987-01-01), Theurer et al.
patent: 4664791 (1987-05-01), McClain et al.
patent: 4669674 (1987-06-01), Oldengott et al.
patent: 4799430 (1989-01-01), Theurer
patent: 4812078 (1989-03-01), Rivard
patent: 4861461 (1989-08-01), Utterback

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