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. 08, 1989
Filed:
Feb. 08, 1988
Wavin BV, Zwolle, NL;
Abstract
Welding sleeve comprising electrically conductive material embedded in the thermoplastic material of the wall of said sleeve. In a sleeve at least two connecting means are present which each comprise at least two metal parts which can cooperate in clamping contact with the electrically conductive material. One metal part is inserted from the inside of the sleeve and one part from the outside; appropriate coaxial bores being present to allow passage of a pin on the lower part and the body of the upper part. Upon mounting the upper part and lower part are connected with use of a force; the electrically conductive material is clampingly contacted. The invention also relates to a method for forming a welding sleeve according to the invention and to an equipment for use in carrying out such a method.