Seat belt pretensioner
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United States of America Patent
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Jul 12, 2011
Grant Date -
Mar 4, 2010
app pub date -
May 13, 2009
filing date -
Aug 29, 2008
priority date (Note) -
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status (Latency Note)
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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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