公开(公告)号：US06568184B2

公开(公告)日：2003-05-27

申请号：US09923119

申请日：2001-08-06

申请人： Jeff Blackburn ,  Graylon K. Williams ,  Sean P. Burns

发明人： Jeff Blackburn ,  Graylon K. Williams ,  Sean P. Burns

IPC分类号： F01B2908

CPC分类号： B60R21/38 ,  C06D5/06 ,  F15B15/19 ,  F15B15/262

摘要： A pyrotechnic actuator 10 contains a tapered piston 30 that is first propelled through a chamber 18 upon actuator 10 operation. A narrower portion 38 of the piston 30 initially enters an annular retainer 40 having an annulus 42. The diameter or cross-sectional area of the annulus 42 is about equal to or less than the cross-sectional area of portion 38. As the diameter of the tapered piston 30 increases over the length passing through retainer 40, to a diameter greater than that of annulus 42, the piston 30 is then wedged or fixedly received within the annular retainer 40, thereby preventing retraction of piston 30 once a load is exerted thereon.