Seat belt pretensioner

Details Seat belt pretensioner Seat belt pretensioner

2011-07-12

2011-07-12

Dickson, Paul N (Department: 3616)

Land vehicles

Wheeled

Attachment

C297S479000, C297S480000

Reexamination Certificate

active

07976066

ABSTRACT:
A seat belt pretensioner may include a cylinder, a piston slidably disposed in the cylinder, a gas generator installed to rear end portion of the cylinder and configured to supply a propellant gas to the piston for moving the piston in a forward direction, a first direction conversion unit disposed between the gas generator and the piston and connected to the cylinder, and a coupling member for coupling a seat belt and the piston, wherein a portion of the coupling member is engaged with the first direction conversion unit so as to change a movement direction of the coupling member while the piston moves in the forward direction, and a reward movement restriction member configured to restrict a rearward movement of the piston while the piston moves in the forward direction by the propellant gas of the gas generator.

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