COAXIAL PIPE ELBOW AND METHOD OF MANUFACTURING THE PIPE ELBOW

Title:

COAXIAL PIPE ELBOW AND METHOD OF MANUFACTURING THE PIPE ELBOW

Document Type and Number:

WIPO Patent Application WO/2002/041440

Kind Code:

A1

Abstract:

A coaxial pipe elbow and a method of manufacturing the pipe elbow; the coaxial pipe elbow, comprising an outer conductor (10) and an inside conductor (20) stored in the outside conductor pipe (10) having bent parts (12, 21D) bent to specified angles, wherein the longitudinal cross sectional shape of the bent part (12) of the outside conductor pipe (10) is formed in an arc shape, and the longitudinal cross sectional shape of the bent part (21D) of the inside conductor (20) should desirably be formed in a partially cut out arc shape; the method of manufacturing the outside conductor pipe (10), comprising the steps of filling a metal with low melting point into a linear outside conductor pipe, bending the pipe in a metal mold in that state, and fusing the metal with low melting point by heating to remove the metal so as to provide the bent outside conductor pipe (10), whereby the coaxial pipe elbow formed of less number of parts and allowed to be assembled without using brazing can be provided.

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Inventors:

HIGUCHI TADASHI (JP)
TSUCHIZAKI YOSHIO (JP)
TAKANO TOYOHISA (JP)
NAGASAWA MOTOKAZU (JP)
RYOMA MASAO (JP)
HARIMA HIROSHI (JP)

Application Number:

PCT/JP2001/009888

Publication Date:

May 23, 2002

Filing Date:

November 13, 2001

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)
KOYAMA KOJI (JP)
SANWA TRADING CO LTD (JP)
HIGUCHI TADASHI (JP)
TSUCHIZAKI YOSHIO (JP)
TAKANO TOYOHISA (JP)
NAGASAWA MOTOKAZU (JP)
RYOMA MASAO (JP)
HARIMA HIROSHI (JP)

International Classes:

H01P1/02; H01P11/00; H01R43/00; H01R103/00; (IPC1-7): H01P1/02

Foreign References:

US3943470A	1976-03-09
US2899651A	1959-08-11
US2706278A	1955-04-12
US2530064A	1950-11-14
JPS4942306Y1	1974-11-19

Other References: