Linear drive for a belt pretensioner
AssigneeTRW Occupant Restraint Systems GmbH & Co. KG
InventorJohannes Schmid
Life of this patent
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Abstract
A linear drive for a belt pretensioner is provided. The linear drive includes a cylinder tube with a hollow inner space, a pyrotechnic drive charge which generates a pressurized gas, and a piston able to be displaced in the inner space of the cylinder tube under the action of the pressurized gas. The piston has a hollow interior space and an axial end having an end wall. The end wall has a passage opening which is closed by a blow-out patch.
Claims6
A linear drive for a belt pretensioner, comprising a cylinder tube with a hollow inner space, a pyrotechnic drive charge which after being fired generates a pressurized gas, and a piston able to be displaced in said inner space of said cylinder tube under the action of said pressurized gas, said piston having a hollow interior space and an axial end at which an end wall is provided, said end wall being provided with a passage opening and said passage opening being closed by a blow-out patch.
Dependencies are inferred from the claim text.