CH516701A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Wound strip filter tube - from resin-impregnated glass fibre for underground service
Assignee: Norm Plastics
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Filing: 1971-03-05
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Granted: —
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Expires: 1991-03-05
Abstract
Abstract filter tube, particularly for soil drainage or in water wells as a shaft lining, comprises a glass fibre reinforced plastic wound body, consisting of glass fibre reinforced plastic strip wound round the tube axis in left and right hand crossing helices, each with the same pitch, the parallel strips being spaced apart in such a way that the dimensions of the apertures between the crossing strips determine the size of the filter openings.
Inventors
- 👤 Carl Tschuemperlin Alois
- 👤 Angermeyer Elfried
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216
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