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:
Nov. 18, 1980
Filed:
Mar. 20, 1978
Applicant:
Inventors:
Suguru Sakamoto, Amagasaki, JP;
Takuzo Nakazato, Amagasaki, JP;
Tsugio Minoshima, Amagasaki, JP;
Tohachiro Tanaka, Tokyo, JP;
Assignee:
Sumitomo Kinzoku Kogyo Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285150 ; 285158 ; 285189 ; 285286 ;
Abstract
A pipe joint construction comprises a main pipe having a circular section of outer diameter D and one or more branch pipes having a circular section of outer diameter d. The wall thickness To of the main pipe is increased at the interior of the main pipe to a value T at the portion to which branch pipes are welded. The angle .phi. subtended by the portion of increased thickness at the center of the main pipe is determined by the following relationship, that is,