Low cost ignition device for gas generators
US6739264B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Nov 4, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/121
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An initiator has a circuit board with two spaced copper traces and a bridge resistor of Nichrome® or tantalum nitride at one end, and wire leads or pins joining the wire traces at the other end. A zener diode is placed between the wire leads and a bridge resistor. Immediately before the wire leads reach the circuit board they pass through a ferrite core. The wire leads, the ferrite core, and the circuit board except for the end of the board to which the bridge resistor is mounted, is insert molded into a body of glass filled nylon 6,6. The nylon body mounts an aluminum can that covers the bridge resistor and is bonded to a circumferential groove in the nylon body. The bridge resistor is covered with primary explosives such as zirconium potassium perchlorate and the can is filled with gas generating granules such as 5-aminotetrazole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.