Patent ID: 6029994
Filing Date: 2000-02-29
Classification: B60R

Abstract:
Pyrotechnic generator of hot gases (1, 101), intended for motor vehicle safety, comprising a cylindrical tube (2, 102) which has a continuous side wall (3, 103) the length (L, 1) of which is at least two times greater than its external diameter (D, d), an igniter (7) and a pyrotechnic charge (14, 114), whereini) said cylindrical tube (2, 102) is made of metal, said metal being sufficiently ductile to be capable of being crimped, said tube (2, 102) comprising a continuous upstream part (4, 104) and a downstream part (5, 105) provided with holes (6, 106), and having an upstream open end and a downstream open end,ii) an inner nozzle (17, 117) comprising a cylindrical component (18) which has a central orifice (19), said component (18) being fixed by crimping into the side wall (3, 103) at the junction of the upstream part (4, 104) and of the downstream part (5, 105) of the tube,iii) said pyrotechnic charge (14, 114) is placed in the upstream part (4, 104) and isolated from the continuous side wall by a cylindrical enclosure (12, 112),iv) said igniter (7) is inserted into an igniter-carrier (8, 108) fixed in the upstream open end of the tube (2, 102), andv) a leakproof plug (21) is fixed in the downstream open end of the tube (2, 102).