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US 6,079,745 AGranted
Pyrotechnical linear actuating means for a belt tensioner
AssigneeTRW Occupant Restraint Systems GmbH & Co. KG
InventorFranz Wier
Life of this patent
Estimating the term…
Abstract
A pyrotechnical linear actuating means for a belt tensioner, comprises a piston/cylinder unit having a piston and a cylinder, a multi-stage gas generator having several propellants separated from each other for actuating the piston, and an ignition unit for activating the propellants of the gas generator. Each of the propellants being activatable separately individually or at the same time.
Claims18
A pyrotechnic linear actuator for a belt tensioner comprising:
- a cylinder having a cylinder wall defining an interior;
- a piston disposed in said interior of said cylinder;
- a multi-stage gas generator disposed in said interior of said cylinder and being located coaxial with said piston, said gas generator having several actuatable propellants for generating gas to move said piston in said cylinder, said gas generator having a ring-shaped body adjoining said cylinder wall defining said interior of said cylinder, said gas generator including a parting wall separating said propellants from each other;
- and
- an ignition unit for actuating said propellants in said gas generator;
- each of said propellants in said gas generator being actuatable separately, individually, or at the same time.
3 more elements
A pyrotechnic linear actuator for a belt tensioner comprising:
- a cylinder;
- a piston disposed in said cylinder;
- a multi-stage gas generator disposed in said cylinder and having several propellants for generating gas to move said piston in said cylinder, each of said propellants being separated from one another and being actuatable separately, individually, or at the same time;
- a common ignition unit for actuating each of said propellants in said gas generator, said common ignition unit having a corresponding primer assigned to each of said propellants, each of said primers having a common ground lead;
- and
- a common cable extending into said ignition unit and having a common high-frequency choke for each of said primers integrated in said ignition unit,
- said common cable having cores which are branched off following said high-frequency choke to each of said primers, said high-frequency choke being arranged in said common ground lead of said primers.
4 more elements
Dependencies are inferred from the claim text.