Patent ID: 11904796
Assignee: JOYSON SAFETY SYSTEMS ACQUISITION LLC
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 11:
12. A pretensioner for a seat belt device in a vehicle, the pretensioner comprising:
a housing and a gas generator,
an outer cylinder connected to the housing, and a piston movably located within the outer cylinder,
a cable connected to the seat belt device at one end;
an inner cylinder movably located within the outer cylinder, and wherein a second end of the cable is located in the inner cylinder,
wherein the gas generator is configured to provide gas into a pressure chamber located inside of the outer cylinder and adjacent the piston;
wherein the inner cylinder and the cable are configured to be driven in a pretensioning direction by the piston when the gas generator is activated in response to an acceleration of the vehicle greater than a predetermined high acceleration;
a sealing ring located between the outer cylinder and the inner cylinder, wherein the sealing ring is configured to provide a seal to prevent the gases provided by the gas generator from passing;
a deflector shield located between the outer cylinder and the inner cylinder and closer to the pressure chamber than the sealing ring, wherein the deflector shield is configured to block the gases exiting from holes in the inner cylinder from reaching the sealing ring; and
wherein the deflector shield includes a sloped surface, wherein one end of the sloped surface overhangs the holes of the inner cylinder.