EP0436923B2
Expired / Lapsed
EP
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Flexible coolant hoses
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1990-12-23
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Granted: 2000-03-29
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Expires: 2010-12-23
Abstract
No abstract record available.
Inventors
- 👤 Franz Dr. Rer. Nat. Dipl.-Chem. Kerschbaumer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 17:25
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/118
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
Flexible coolant conduit (10) having high resistance to hydrolysis and bursting
pressure, for engines, in particular vehicle engines, which comprises layers (12, 14)
firmly bonded to one another by coextrusion, and which has, at least over portions
thereof, an annularly or spirally-corrugated wall, wherein the inner layer (14) consists
of halogenated or non-halogenated homo- or copolyolefins, or mixtures or blends
thereof, wherein between the inner and the outer layer (12) consisting of a homo- or
copolyamide or mixtures or blends thereof and which is not compatible with the inner
layer, an intermediate layer that is compatible with both is arranged between the inner
and outer layer (12) and wherein the intermediate layer is a polyolefin or copolyolefin
provided with functional groups by grafting or copolymerisation.
Claim 2
Dependent Claim
38 words
Coolant conduit according to claim 1, wherein the homo- or copolyamides comprise
linear aliphatic monomers having 6 to 12 C atoms, aromatic monomers having 6 to
12 C atoms or cycloaliphatic monomers having 6 to 20 C atoms.
Claim 3
Dependent Claim
19 words
Coolant conduit according to claim 1, wherein the inner layer comprises chlorinated
or non-chlorinated homo- or copolyolefins or PVC.
Claim 4
Dependent Claim
30 words
Coolant conduit according to one of claim 1 to 3, wherein the wall thickness of the
outer burst pressure-resistant layer (12) constitutes 25% to 95% of the total wall
thickness.
Claim 5
Dependent Claim
21 words
Coolant conduit according to one of claim 1 to 4, wherein the bursting pressure
resistance is about 8 bar at 100°C.
References Cited (Backward Citations)
No citation records indexed.
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