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:
Feb. 11, 2003
Filed:
Jul. 11, 2001
Applicant:
Inventor:
Kiyoshi Nishio, Sanda, JP;
Assignee:
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 2/500 ;
U.S. Cl.
CPC ...
F16L 2/500 ;
Abstract
The invention provides a pipe joint made of resin in which a predetermined pressing force in the axial direction corresponding to a fastening torque of a union nut can be obtained, and the strength of threads can be enhanced. Each of threads of an external thread portion of a joint body and an internal thread portion of a union nut is formed as an asymmetrical trapezoid, an included angle al of first flanks of the asymmetrical trapezoidal threads which contact with each other by fastening the union nut is set to 70 to 90°, and an included angle &agr; of said flanks 9 and 20 opposite to the first flanks is set to 40 to 80°.