Pipes and tubular conduits – Distinct layers – With intermediate insulation layer
Patent
1978-04-27
1980-06-10
Stephan, Steven L.
Pipes and tubular conduits
Distinct layers
With intermediate insulation layer
138DIG9, 181252, F15D 100
Patent
active
042067855
ABSTRACT:
Thermoplastic tube part provided with a polyurethan foam layer with closed skin and containing an inorganic filler for reducing sound production during flow of water through such tube parts.
REFERENCES:
patent: 3698440 (1972-10-01), Matthieu et al.
patent: 3698993 (1972-10-01), Rauh
patent: 4034994 (1977-07-01), Ohta et al.
Graafmann Jurgen
Setzer Eberhart
Stephan Steven L.
Wavin B.V.
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