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Wartsila Oy AB
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Wartsila Oy AB
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Application filed by Wartsila Oy ABfiledCriticalWartsila Oy AB
Priority to ES1967134586UpriorityCriticalpatent/ES134586Y/en
Publication of ES134586UpublicationCriticalpatent/ES134586U/en
Application grantedgrantedCritical
Publication of ES134586YpublicationCriticalpatent/ES134586Y/en
Strangulation device for water pipes, with a spiral-shaped circulation channel formed between an outer tube and an inner core of soft, phono-absorber material, characterized in that the soul has at its two ends a short splice part with a axial length of maximum 50% of the axial length of the spiral-shaped channel, the circulation channel running mainly axially in the connecting parts, and having a cross-sectional area that increases in its passage in the direction that is moves away from the spiral shaped channel. (Machine-translation by Google Translate, not legally binding)
ES1967134586U1967-11-251967-11-25
STRANGULATION DEVICE FOR WATER PIPES.
ExpiredES134586Y
(en)
Improvements in a method and apparatus for manufacturing a transversely grooved thermoplastic tube with a smooth inner wall and a tube when made by this method