Title: Sub-surface irrigation channel

Abstract: Apparatus including a digger for digging a trench to a predetermined level which is maintained by control apparatus responsive to a laser beam plane. The earth removed by the digger is directed into screening apparatus, and at least some of the fine particles therefrom are spread over the bottom of the trench to a predetermined depth. A roller unit follows the digger and presses a system of channels in the trench bottom. The coarser particles from the screening apparatus are then spread over the trench bottom and the channels. If desired, the apparatus may include means for directing a sealant over the surfaces of the channels before the coarse particles are directed thereover.

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Inventors: Taylor-Smith, Ernest J.

Application Number: 887535
Filing Date: 1978-03-17
Publication_date: 1980-09-09
Assignee:
Primary Class(es): 405/303 37/142.5, 37/348, 172/4.5, 405/36
Other Classes:
US Patent Ref:

2201493	May, 1940	Jorgensen	404/91.
2211262	Aug, 1940	Flynn	404/91.
2738745	Mar, 1956	Harpold	405/179.
2788725	Apr, 1957	Wilkey et al.	37/98.
3203188	Aug, 1965	Evans	405/179.
3332249	Jul, 1967	Idoine	405/179.
3516182	Jun, 1970	Wykert	37/DIG.
3585804	Jun, 1971	Sramek	405/36.
3727332	Apr, 1973	Zimmer	299/1.

Other Refs: 1176064

Aug, 1964	DE

Primary Examiner: Taylor, Dennis L.
Assistant Examiner:
Attorney: Fulwider, Patton, Rieber, Lee & Utecht