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:
Mar. 09, 2004
Filed:
May. 24, 2000
Dan Windmar, Vittinge, SE;
Göran Holmström, Sollentuna, SE;
Anders Björklund, Västerås, SE;
Hans-Olaf Kallin, late of Västerås, SE;
Lars Johansson, Ludvika, SE;
ABB AB, Vasteras, SE;
Abstract
The invention concerns a method for manufacturing an electrical insulator that includes a body ( ) and a coating ( ) of insulating material arranged on the body ( ) where the coating is applied onto the body in a screw-like form or a helical-like form, whereby the coating is applied by extrusion directly on the body ( ). In this way, the build-up trapped pockets of air between the applied coating and the body ( ) is prevented, and good adhesion is achieved. The invention also concerns an apparatus for manufacturing an insulator as well as the use of the said method or apparatus for the manufacturing of a high voltage insulator.