Patent · US Expired

Bridge-type igniter ignition element

US6986307B2 · kind B2 · utility

3Cited by

17References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Winfried Bernhard · Gerlingen, DE
Lutz Mueller · Altadena, US
Ulrich Kunz · Stuttgart, DE

Key dates

Filing date	Sep 2, 2003
Grant date	Jan 17, 2006
Priority date	—
Expiry date	Sep 2, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF42B3/124
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A bridge-type ignition element for initiating the ignition of pyrotechnical materials lying above it by heating when an electric current is passed through it. The bridge-type element is essentially made up of a resistance layer applied to a substrate, a reactive layer, applied on top of that, made of especially an oxidizable metal and a polymeric cover layer situated on top of that, whose material is selected in such a way that it is able to react exothermally at an elevated temperature with the oxidizable material of the reactive layer. The polymeric cover layer makes possible not only a lower energy requirement but also achieves corrosion protection from the surroundings and from the pyrotechnical material.

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