Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
Patent
1976-12-29
1979-11-27
Haroian, Harry N.
Hydraulic and earth engineering
Drainage or irrigation
Porous or apertured pipe, flume, or tileway
138148, 138103, 138 42, 138156, 239542, 239547, 156217, 156203, E02B 1300, B05B 1500
Patent
active
041758820
ABSTRACT:
A hose conduit comprises an inner tubular fluid conducting space which is surrounded by a ringshaped space. Openings are provided in the wall of the inner hose leading into the ringshaped space. In the ringshaped space is provided a longway passage extending through repeated bows and bends and repeatedly changing its direction. From the said longway passage openings in the outer wall of the said ringshaped space lead into the open. The assembly of the hose conduit is built up of at least two layers of thin foil which are connected together. The longway passage is obtained by profiling one of the foils, i.e. by applying a raised, embossed pattern to one of the foils.
REFERENCES:
patent: 3870236 (1975-03-01), Barragan
patent: 3873030 (1975-03-01), Barragan
patent: 3887138 (1975-06-01), Gilead
patent: 3927464 (1975-12-01), Wallsten
patent: 4022384 (1977-05-01), Hoyle et al.
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