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:
May. 15, 1990
Filed:
Feb. 27, 1989
Applicant:
Inventors:
Masahide Ike, Yokohama, JP;
Kunio Kawai, Yokohama, JP;
Assignee:
Nissan Motor Company, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
181243 ; 181240 ; 291574 ; 228175 ; 22826315 ;
Abstract
An exhaust manifold is, which includes a plurality of steel members having the same metallic crystal structure in a range of working temperature, which are jointed with each other by permanent welding and spot welding at different places, wherein material for the spot welding is a material having a different metallic crystal structure than that of the steel members.