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US 7,219,929 B2Granted
Seat belt pretensioner
AssigneeKey Safety Systems, Inc.
InventorsJohn Bell, Brian A. Jack, David Hunter
Life of this patent
Estimating the term…
Abstract
A pretensioner for a three point vehicle safety restraint seat belt has a mounting for one end of the seat belt. The mounting has a first member fixed to a load bearing part of the vehicle and a second member attached to the end of the seat belt. A force reservoir, such as a pyrotechnic unit, moves the second member relative to the first member in a pretensioning direction in response to activation by a crash sensor.
Claims14
A pretensioner for a three point seat belt comprising:
- a mounting for a sill end of the seat belt, the mounting comprising a first member adapted to be fixed to a load bearing part of a vehicle and a second member attached to the end of the seat belt, and a means for moving the second member translationally relative to the first member in a pretensioning direction when activated by a crash sensor, the first member comprising a means for restraining motion of the second member in a non-pretensioning direction, wherein the means for restraining motion of the second member comprises ratchet teeth formed in a surface of a rail.
Dependencies are inferred from the claim text.