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Patent EP0294181A2 successfully refreshed from Google Patents.
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EP0294181A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Hose construction

Assignee: Yokohama Rubber Co Ltd
•
Filing: 1988-06-01
•
Granted: —
•
Expires: 2008-06-01
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Abstract

Abstract Hoses (10) for transporting or otherwise handling refrigerant and oil fluids are disclosed which are comprised of an inner tube (20), an outer cover (40) and a reinforcing layer (30) interposed therebetween. The inner tube includes at least two walls, one being an inner resinous wall (20a) and the other being an outer rubbery wall (20b) having specified moduli at 100%. The outer cover is formed by a selected class of rubbers having a higher modulus at 100% than the outer wall of the inner tube. The resulting hose is securely interconnectable with metal fittings, highly impermeable to gaseous and oily fluids, sufficiently resistant to stress cracking and adequately flexible.

Inventors

  • 👤 Tetsu Kitami
  • 👤 Jun Mito
  • 👤 Toyotaka Narita

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 19:23
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L33/00; F16L33/20; F16L33/207; F16L33/2071; F16L33/2073; F16L33/2076; F16L11/085; F16L33/01; F16L2011/047

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 66 words
A hose comprising an inner tube, a reinforcing layer and an outer cover superimposed one on another, said inner tube including at least two walls, one being an inner resinous wall formed by a polyamide resin and the other being an outer rubbery wall having a 100% modulus of 15 to 40 kgf/cm², and said outer cover having a 100% modulus of 20 to 50 kgf/cm².
Claim 2
Dependent Claim 66 words
A hose comprising an inner tube, a reinforcing layer and an outer cover superimposed one on another, said inner tube including at least two walls, one being an inner resinous wall formed by a polyamide resin and the other being an outer rubbery wall having a 100% modulus of 15 to 40 kgf/cm², and said outer cover having a 100% modulus of 20 to 50 kgf/cm².
Claim 3
Dependent Claim 28 words
The hose according to claim 1, said outer wall having a 100% modulus of 15 to 40 kgf/cm² and a tear strength of not less than 15 kgf/cm.
Claim 4
Dependent Claim 18 words
The hose according to claim 1, said inner wall being formed by nylon-6, nylon-11, nylon-12, nylon-6/66 or nylon6/nylon-11/polyolefin.
Claim 5
Dependent Claim 38 words
The hose according to claim 1, said outer wall being formed by acrylonitrile/butadiene rubber, chlorosulfonated polyethylene rubber, ethylene/propylene/diene rubber, butyl rubber, chlorinated butyl rubber, brominated butyl rubber, epichlorohydrin rubber, butyl rubber, chlorinated butyl rubber or brominated butyl rubber.
Claim 6
Dependent Claim 28 words
The hose according to claim 1, said outer cover being formed by ethylene/propyrene/diene rubber, chlorosulfonated polyethylene rubber, epichlorohydrin rubber, butyl rubber, chlorinated butyl rubber or brominated butyl rubber.

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