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:
Aug. 13, 2019
Filed:
Oct. 17, 2014
Metal One Corporation, Tokyo, JP;
Teruaki Suzuki, Tokyo, JP;
METAL ONE CORPORATION, Tokyo, JP;
Abstract
A joint structure for steel pipes according to the invention includes a pair of steel pipes having male threads formed at end portions thereof, and a coupling having a pair of sets of female threads formed therein so that the male threads of the pair of steel pipes screw in the pair of the sets of female threads, respectively. Distal end surfaces at the end portions of the steel pipes have inner circumferential edges each protruding in a direction of a pipe axis with respect to outer circumferential edges thereof. When the pair of steel pipes are coupled to each other by the coupling and the inner circumferential edges of the distal end surfaces of the pair of steel pipes are brought into contact with each other, a gap is formed between the outer circumferential edges of the distal end surfaces of the pair of steel pipes.