The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1983
Filed:
Sep. 08, 1981
Applicant:
Inventors:
Takesada Sasaki, Machida, JP;
Hiroshi Endo, Zama, JP;
Yoshimasa Zama, Sagamihara, JP;
Masahiko Shiraishi, Nakatsu, JP;
Yosinari Miura, Nakatsu, JP;
Masayuki Yamaguchi, Nakatsu, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138149 ; 138113 ; 138114 ; 138115 ; 138148 ; 60322 ;
Abstract
A steel tubing and more particularly a composite dual tubing which can be suitably used for an exhaust pipe capable of effectively reducing the radiated noise from the exhaust pipe of automobiles. A metallic dual tubing of the present invention comprises: lugs (20a); lugs (20a) and heat-resistant filler material (24); or, the spacer member (16) and the heat-resistant filler member (17).