Underground drainage pipe

Details Underground drainage pipe Underground drainage pipe

1977-04-01

1978-07-25

Stein, Mervin

61 13, E02B 1100

Patent

active

041021355

ABSTRACT:
An extruded plastic drainage pipe having long narrow drainage openings with a width of about one eighth inch to limit the flow of particulate matter through the openings and into the pipe. The circumferential extend of the trough is greater than that of the roof and the thickness of both the roof and trough decrease from either side of the centers thereof. The lips of the trough join the roof at approximately 90.degree. to provide a construction particularly adapted to withstand high loading forces without collapse.

REFERENCES:
patent: 2782805 (1957-02-01), Leadbetter
patent: 3681925 (1972-08-01), Schmunk et al.

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