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:
Jan. 31, 2006
Filed:
Dec. 19, 2002
Kiyoshi Nishio, Sanda, JP;
Kiyoshi Nishio, Sanda, JP;
Nippon Pillar Packing Co., Ltd., Hyogo, JP;
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 the threads of an external thread portion of a joint body and an internal thread portion of a union nut is formed asd an asymmetrical trapezoid, an inclined angle αof 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 αof the flanks opposite to the first flanks is set to 40 to 80°, and wherein the joint body defines a sealing portion the angle and direction of taper of which is defined by an angle θ, said external thread is defined by an angle θ, where θ=αand wherein θ<θand |cos θ|>|cos θ|.