Patent · US Expired

High current capacity sub-miniature fuse

US4899123A · kind A · utility

7Cited by

2References

19Claims

0Family size

Assignee

Wickmann-Werke GmbH · DE

Inventors

Norbert Asdollahi · Witten, DE
Karl Poerschke · Sprockhövel, DE
Klaus Stark · Witten, DE
Claus Friedrich · Gevelsberg, DE

Key dates

Filing date	Dec 15, 1988
Grant date	Feb 6, 1990
Priority date	—
Expiry date	Dec 15, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2085/388
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A sub-miniature fuse having a fusible conductor which will fuse under an over-current condition within a pressure-tight chamber. A metal surface is positioned near the fusible conductor within the chamber and is formed and positioned relative to the fusible conductor so that during the switching off of the fuse, any arc created between the fused ends jumps over to the metal surface. Thus, at least one secondary arc is created which burns against the metal surface as a shunt line. By melting a part of the metal surface, sufficient heat is absorbed that the secondary arc is quenched.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.