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:
Apr. 27, 1999
Filed:
Feb. 27, 1996
Applicant:
Inventors:
Toshio Toshima, Amagasaki, JP;
Takahiro Ishihara, Amagasaki, JP;
Atsuichi Namariyama, Amagasaki, JP;
Assignee:
Kubota Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138109 ; 285374 ; 285415 ;
Abstract
A pipe having a ridge on the spigot and a method of producing such ridge. A ring having a circumferentially disposed split or splits is fitted in an annular groove formed in the outer periphery of the spigot, with the diameter of said ring being adjusted according to the tolerance of the outer diameter of the pipe. A pair of thin-walled portions formed on the circumferentially opposite ends of the ring defining the split are connected together by a connector or connectors operated from the outer peripheral side of the ring.