Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
Patent
1989-09-18
1992-08-25
Taylor, Dennis L.
Hydraulic and earth engineering
Drainage or irrigation
Porous or apertured pipe, flume, or tileway
47 485, 71 65, 405 36, 405 45, 138115, E02B 1300
Patent
active
051413604
ABSTRACT:
In accordance with the disclosed invention a desirable, elongated irrigation tube having a plastic or polymer peripheral wall in which there are a series of dispensing holes leading from the interior of said tubing to the exterior of said tubing is constructed so as to include at least one of the following: (1) all of said holes having a cross-sectional shape along a section taken perpendicular to the length of said holes such that the ratio of the length of the perimeter of the interior of the wall of each hole to the cross-sectional area of the hole is greater than that of a circle; (2) that said wall includes a body of a plastic material containing an effective amount of a root inhibitor to preclude root growth within said holes and adjacent to said holes at the exterior of said wall; and (3) said wall consisting of an even number of elongated panels and line like areas of reduced thickness which are more flexible than said panels joining said panels, said areas permitting said tubing to automatically fold flat when coiled.
REFERENCES:
patent: 2156604 (1939-05-01), Payne et al.
patent: 2976191 (1961-03-01), Weston
patent: 3219368 (1965-11-01), Crumpler
patent: 3403993 (1968-10-01), Hoff
patent: 3903929 (1975-09-01), Mock
patent: 3936380 (1976-02-01), Boske
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