Excavating – Ditch filler
Patent
1974-04-25
1976-02-10
Crowder, Clifford D.
Excavating
Ditch filler
37 80A, 37DIG16, 61 721, 172764, E02F 522
Patent
active
039369617
ABSTRACT:
Device for covering drainage tubing with fine textured soil granules comprises main framework with pair of tillers connected thereto by adjustable connection which varies elevation of tillers relative to main framework. Each tiller includes vertically oriented shaft journaled to secondary frame, and tines extend outwardly from each shaft. Motivators are connected to rotate each shaft so that tines penetrate side walls of trench in which drainage tubing has been positioned to thereby break away fine textured soil granules and shower them over drainage tubing.
REFERENCES:
patent: 507819 (1893-10-01), Keahey
patent: 1866037 (1932-07-01), Heim et al.
patent: 2150848 (1939-03-01), Shackleton
patent: 2223608 (1940-12-01), George
patent: 2602410 (1952-07-01), Vaughn
patent: 3235982 (1966-02-01), Krohn
patent: 3654713 (1972-04-01), Craddick et al.
Advanced Drainage Systems, Inc.
Crowder Clifford D.
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