Backfill machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 3, 1990
Grant Date -
N/A
app pub date -
Jan 9, 1989
filing date -
Jan 9, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention comprises a mobile backfilling machine wherein raw materials located adjacent an excavated trench are picked up, graded and delivered to the open trench in an order of size grading from finest to coarsest, thereby providing a fine material padding for a product which has been placed into the trench. The machine may also be used to place a warning ribbon into the trench at a point above the padding.
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Cited Art Landscape
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