F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 11/04 (2006.01) B29C 47/00 (2006.01) F16L 11/11 (2006.01) F16L 11/12 (2006.01)
Patent
CA 2138903
A coolant conduit which is an elongate tubular article for an apparatus requiring cooling by a cooling agent, such as an engine, for example, an internal combustion engine, includes a plurality of layers which are provided by sequential coextrusion thereof and which are adjoined thereby, each layer of the plurality being comprised of a polymeric material which is thermoplastically processable. The plurality of layers may include an inner layer which is composed of a polymeric material which is substantially inert to cooling agent and which is substantially non-swelling, and an outer layer which is composed of at least one polyamide and which is pressure resistant. The coolant conduit may include a plurality of longitudinal sections, and at least one layer of the plurality of layers may then be composed of a polymeric material which differs between longitudinal sections thereof as is made possible by sequential coextrusion thereof.
Conduite de forme tubulaire pour acheminer le liquide de refroidissement nécessaire pour refroidir un système tel un moteur, un moteur à combustion interne, par exemple, comportant une pluralité de couches produites par coextrusion séquencée et qui sont superposées, chacune des multiple couches étant composée d'un polymère thermoplastique. La pluralité de couches peut comporter une couche interne composée d'un polymère presque totalement inerte à l'agent de refroidissement et non susceptible au gonflement, ainsi qu'une couche externe composée d'au moins un polyamide résistant à la pression. La conduite de liquide de refroidissement pour comporter une pluralité de sections longitudinales, et au moins une des multiples couches peut être composée d'un polymère différent d'une section longitudinale à l'autre, comme le rend possible la coextrusion séquencée.
Ems-Inventa Ag
Gowling Lafleur Henderson Llp
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