Title:
DOUBLE PIPE AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2004270916
Kind Code:
A
Abstract:
To provide a double pipe, simple in manufacture, wherein contact between an outer pipe and an inner pipe can be made strong even at a gently bent spot and the generation of chatter can be prevented.
In a case of a double pipe having an inner pipe 2 for permitting a second fluid to flow in the internal part of an outer pipe 1 for permitting a first fluid to flow, the inner pipe 2 previously processed in a spiral state or a wave-form state is inserted into the internal part of the outer pipe 1. In this state, by bending the outer pipe 1 into a given shape for deformation, the inner pipe 2 and the outer pipe 1 are brought into pressure contact with each other at the bent and deformed part of the outer pipe 1.
Inventors:
TAKASAKI HIROMI
TAKAMATSU YOSHIKAZU
TAKAMATSU YOSHIKAZU
Application Number:
JP2003282402A
Publication Date:
September 30, 2004
Filing Date:
July 30, 2003
Export Citation:
Assignee:
CALSONIC KANSEI CORP
International Classes:
B21D11/06; B21D11/14; B21D15/12; F16L9/18; F16L9/19; F28D7/02; F28F1/06; (IPC1-7): F16L9/18; B21D11/06; B21D11/14; B21D15/12
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Akira Kurihara
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Akira Kurihara
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
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