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. 08, 2005
Filed:
Feb. 08, 2002
Bodo Boettcher, Bayreuth, DE;
Ralf Lietzke, Anzing, DE;
Gerold Malin, Kaltenleutgeben, AT;
Robert Paul Glembocki, Holly Springs, NC (US);
Matthew Helm Spalding, Fuquay Varina, NC (US);
Bodo Boettcher, Bayreuth, DE;
Ralf Lietzke, Anzing, DE;
Gerold Malin, Kaltenleutgeben, AT;
Robert Paul Glembocki, Holly Springs, NC (US);
Matthew Helm Spalding, Fuquay Varina, NC (US);
Abstract
An elongate high voltage insulator is formed of a rod or tube of insulating material, with a pair of electrodes spaced apart longitudinally thereof. At least part, and preferably the whole of the outer surface of the insulating material is covered by a layer of material including a particulate filler of varistor powder in a matrix having a switching electrical stress-controlling characteristic that is in electrical contact with each of the electrodes. The insulator core may be made of porcelain, and the stress-controlling material may be zinc oxide.