EP0047525A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Composite dual tubing
Assignee: Nippon Steel Corp
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Filing: 1981-09-08
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Granted: —
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Expires: 2001-09-08
Abstract
Abstract A metallic dual tubing comprises an inner tube (10) and an outer tube (20) and is provided with an intermediate layer (18) comprising combustible material filled between the inner tube (10) and the outer tube (20). This layer may be a single layer consisting of the combustible material or of the mixture of such material with a heat-resistant material. The intermediate layer may be also a dual layer of the combustible material and the heat-resistant material.
Inventors
- 👤 Takesada Sasaki
- 👤 Hiroshi Endo
- 👤 Yoshimasa Zama
- 👤 Masahiko Shiraishi
- 👤 Yosinari Miura
- 👤 Masayuki Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 07:01
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F01; F01N; F01N13/00; F01N13/08; F01N13/14; F01N13/141; F01N13/18; F16L9/00; F16L9/21; F01N2310/00; F01N2310/02; F01N2470/00; F01N2470/24; F01N2530/00; F01N2530/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
A metallic dual tubing comprising an inner tube (10) and an outer tube (20), characterized in that said metallic dual tubing is provided with an intermediate layer (18) comprising combustible material filled between said inner tube and said outer tube.
Claim 2
Dependent Claim
40 words
A metallic dual tubing comprising an inner tube (10) and an outer tube (20), characterized in that said metallic dual tubing is provided with an intermediate layer (18) comprising combustible material filled between said inner tube and said outer tube.
Claim 3
Dependent Claim
27 words
A metallic dual tubing according to claim 1, wherein the thickness of said intermediate layer (18) is in the range of from about 0.1 to 0.5 mm.
Claim 4
Dependent Claim
31 words
A metallic dual tubing according to claim 1, characterized in that said intermediate layer is a dual layer consisting of a combustible material layer (18) and a heat--resistant material layer (18a).
Claim 5
Dependent Claim
28 words
A metallic dual tubing according to claim 3, wherein the thickness of said combustible material layer (18) is in the range of from about 0.1 to 0.5 mm.
Claim 6
Dependent Claim
30 words
A metallic dual tubing according to claim 3 or 4, wherein the thickness of said heat-resistant material layer (18a) is in the range of from about 0.1 to 0.5 mm.
Claim 7
Dependent Claim
56 words
A metallic tubing according to claim 1, characterized in that said intermediate layer consists of a mixture (18b) of heat-resistant material with combustible material and has a thickness in the range of from about 0.2 to 1.0 mm, the proportion of the combustible material to the intermediate layer mixture being from 50 to 60% by volume.
Claim 8
Dependent Claim
22 words
A metallic tube according to claim 1, 3 or 6, wherein said heat-resistant material is glass cloth, ceramic fiber or rock wool.
Claim 9
Dependent Claim
19 words
A metallic tube according to claim 1, 3 or 6, wherein said combustible material is synthetic resin or paper.
Claim 10
Dependent Claim
19 words
A use of metallic dual tubing according to claim 1, 3 or 6, as the exhaust pipe of automobiles.
References Cited (Backward Citations)
DE1750784A1
Cited
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