Apertured pipe segment

Details Apertured pipe segment Apertured pipe segment

1989-05-31

1991-09-10

Taylor, Dennis L.

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

405 45, 138103, 166234, 166235, E02B 1100

Patent

active

050468928

ABSTRACT:
An apertured pipe segment is disclosed which is of injection moulded plastics construction and can be used to form a well screen or sub-soil drainage pipe. Each aperture comprises a longitudinally extending inner slot which extends from a slot mouth inwardly and is defined by inwardly diverging slot walls, and an outer slot which extends from the outside of the pipe segment inwardly to the slot mouth. The smallest width of the outer slot is greater than the width of the slot mouth. The inner slot is open longitudinally to one end of the pipe segment and the outer slot is open longitudinally to the other end of the pipe segment. The pipe segments can thus be made by an inexpensive two-part mould not requiring collapsible cores.

REFERENCES:
patent: 1821659 (1931-09-01), McEvoy
patent: 3502145 (1970-03-01), DuMee et al.
patent: 3712373 (1973-01-01), Bearden et al.
patent: 3822744 (1974-07-01), Reijonen et al.
patent: 4406326 (1983-09-01), Wagner
patent: 4550778 (1985-11-01), Sullivan et al.
patent: 4577997 (1986-03-01), Lehto et al.
patent: 4626129 (1986-12-01), Kothmann et al.
patent: 4756339 (1988-07-01), Buluschek
Houston brochure entitled "Water Well Screens".
Preussag brochure entitled "SBF Casing and Screens for Water Wells-Rigid PVC".

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