Cold-gas pyrotechnic generator
US5139280A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1990 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Jun 27, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a cold-gas pyrotechnic generator, in particular intended for automobile safety, as well as a method for manufacturing this generator. The generator according to the invention comprises a casing (2) of revolution consisting of a base (10) and a cover (20) establishing: PA0 a central channel (80) in which an ignition device is placed, PA0 an annular intermediate chamber (70) containing elements (40) of a gas-generating pyrotechnic composition, PA0 a peripheral annular chamber (60) containing a filter. A continuous lateral opening (71) is provided between the central channel (80) and the intermediate chamber (70). The method for manufacturing a generator of this type consists in assembling the cover (20) with the base (10) containing the filter by friction welding, in placing the casing (2) thus formed onto a lathe and in introducing, after setting in rotation, the pyrotechnic elements (40) into the chamber (70) through the opening (71) and, lastly, in installing the ignition device. The invention thus enables the welding of the casing of the generator to be carried out in the absence of any pyrotechnic element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.