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. 22, 1994
Filed:
Jul. 16, 1992
Akio Nakashiba, Osaka, JP;
Hiroyuki Nishimura, Osaka, JP;
Fumio Nagatani, Kuga, JP;
Kazunori Mito, Kuga, JP;
Toshio Shibabuchi, Osaka, JP;
Mikio Nakaoka, Osaka, JP;
Osaka Gas Co., Ltd., Osaka, JP;
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Shinwa Sangyo Co., Ltd., Osaka, JP;
Abstract
The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various other operations have a crosslinked thermoplastic resin layer and at least one joining portion which comprises a non-crosslinked thermoplastic resin layer that is formed a as an integral part of the crosslinked thermoplastic resin layer in the area where it contacts a tubular member to be joined, and a heating electric wire provided either within or on the outer or inner surface of the non-crosslinked thermoplastic resin layer. Such electrofusion joint and header are applicable to any part of a piping system for supplying hot water and they will withstand use for a prolonged period.