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. 21, 2006
Filed:
Feb. 26, 2004
André Jöllenbeck, Bochum, DE;
Uwe Röder, Witten, DE;
Andreas Baus, Dortmund, DE;
Frank Althoff, Hamm, DE;
Werner Barz, Herdecke, DE;
Peter Pössnicker, Witten, DE;
André Jöllenbeck, Bochum, DE;
Uwe Röder, Witten, DE;
Andreas Baus, Dortmund, DE;
Frank Althoff, Hamm, DE;
Werner Barz, Herdecke, DE;
Peter Pössnicker, Witten, DE;
Wickmann-Werke GmbH, Witten, DE;
Abstract
A fuse element includes a fusible conductor which extends within a gas filled cavity in a cylindrical tube. The fuse element includes a cylindrical tube comprising, an electrical insulator between two end faces of the tube, two end caps of an electrically conductive material being applied to the two ends of the tube such that an electrical contact is produced with the fusible conductor. At least one respective sealing element is inserted in at least one of the two ends in a space between the cap base and the end face of the tube and/or into a portion of the cavity of the tube adjacent to the end face such that one or more pressure balancing passages remain between the gas filled cavity within the tube and the external surroundings of the fuse element. The one or more pressure balancing passages are of such small cross-section that changes in pressure in the cavity are balanced only very slowly. A sudden increase in pressure in the cavity, such as occurs as a result of an arc, which is produced when the fusible conductor ruptures, can act to quench the arc.