Method for producing solid fuel tablets, solid fuel tablets, gas generator, and module having a gas generator

Patent metadata

Field	Value
Publication number	US-10604105-B2
Application number	US-201113823165-A
Country	US
Kind code	B2
Filing date	Aug 4, 2011
Priority date	Oct 29, 2010
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

An inflator (30) comprises at least one combustion chamber (34), filled with a plurality of solid propellant pellets (10), each of the solid propellant pellets (10) including a surface having a breaking point (19) which is delimited at least by two converging surfaces (28) produced by pressing. A method of manufacturing solid propellant pellets (10), includes the steps of providing a solid propellant (12), pressing the solid propellant (12) into a pellet blank (16), the pellet blank (16) having at least one predetermined breaking point (18) which divides the pellet blank (16) into at least two subareas (20), and breaking the pellet blank (16) along the at least one predetermined breaking point (18), wherein each of the at least two subareas (20) forms a solid propellant pellet (10).

First claim

The invention claimed is:

1. A solid propellant pellet ( 10 ) manufactured from a pressed pellet blank ( 16 ) having at least one predetermined breaking point ( 18 ) by breaking the pellet blank ( 16 ) along the at least one predetermined breaking point ( 18 ), the solid propellant pellet substantially exhibiting the shape of a cylinder sector having an upper end face and a lower end face, the at least one predetermined breaking point extending across at least one of the upper end face and the lower end face.

2. The solid propellant pellet ( 10 ) according to claim 1 , wherein the pellet ( 10 ) includes a circumferential surface ( 40 ) which has one portion in the form of a straight cylinder and a connected portion exhibiting a convex curvature, especially in the direction of the center of the pellet blank ( 16 ).

3. The solid propellant pellet ( 10 ) according to claim 1 , wherein fracture surfaces ( 42 ) formed by breaking have a higher surface roughness than the other surfaces delimiting the solid propellant pellet ( 10 ), especially the circumferential surface ( 40 ) and/or the upper and lower end faces ( 24 , 26 ).

4. The solid propellant pellet according to claim 1 , wherein the predetermined breaking point is delimited by at least two converging surfaces that each extend from at least one of the upper end face and the lower end face.

Assignees

• Bernau Klaus
• Bichlmaier Christian
• Reichgruber Sebastian
• Trw Airbag Sys Gmbh

Inventors

• Bernau Klaus
• Bichlmaier Christian
• Reichgruber Sebastian

Classifications

• B60R21/2644

  using only solid reacting substances, e.g. pellets, powder · CPC title

• C06B45/00

  Compositions or products which are defined by structure or arrangement of component of product (explosive charges of particular form or shape F42B1/00, F42B3/00) · CPC title

• B60R21/263

  using a variable source, e.g. plural stage or controlled output (hybrid inflators B60R21/272) · CPC title

• B60R21/264 Primary

  using instantaneous generation of gas, e.g. pyrotechnic (B60R21/268 takes precedence) · CPC title

• B60R21/26

  characterised by the inflation fluid source or means to control inflation fluid flow {(arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10)} · CPC title