Title: Apparatus for high-speed trench digging beside highways

Abstract: A structure for a high-speed chain trencher permitting entrapment of trenched soil and conveyance thereof to a lateral position away from the trench leaving a clean trench so that drainage tubing and compacted sand fill may be installed in the trench free of loose soil and without the necessity of additional trench preparation after passage of the trenching machine. The conditions of usage of the present invention are particularly useful in installing drainage beside highways for enhancing pavement life.

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Inventors: Courson, Thomas G. (Mansfield, IL, US)
Schlueter, William L. (Rantoul, IL, US)
Kelly, Thomas T. (Champaign, IL, US)

Application Number: 765808
Filing Date: 1977-02-04
Publication_date: 1978-06-20
Assignee: Central Illinois Tile Co. (Champaign, IL)
Primary Class(es): 37/352 37/360
Other Classes:
US Patent Ref:

673920	May, 1901	McKee	37/90.
939731	Nov, 1909	Miller	37/86.
1073227	Sep, 1913	Funk	37/86.
1237260	Aug, 1917	Bentson	37/90.
1237310	Aug, 1917	Dobson	37/90.
1689981	Oct, 1928	Vaughn	37/90.
1767017	Jun, 1930	Scheckler	37/86.
2231983	Feb, 1941	Zuckerman	37/86.
2669792	Feb, 1954	Hein	37/90.
2710466	Jun, 1955	Chartier	37/90.
2750687	Jun, 1956	Banister	37/90.
2859544	Nov, 1958	Evans	37/90.
3011278	Dec, 1961	Lust	37/86.
3130506	Apr, 1964	Laster	37/86.
3201948	Aug, 1965	Schramm	37/86.
3209473	Oct, 1965	Davis	37/90.

Other Refs:
Primary Examiner: Crowder, Clifford D.
Assistant Examiner:
Attorney: Wegner, Stellman, McCord, Wiles & Wood