PRETENSIONER, RETRACTOR AND SEAT BELT DEVICE
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United States of America Patent
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app pub date -
Aug 7, 2017
filing date -
Aug 10, 2016
priority date (Note) -
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Abstract
A pretensioner includes a driving wheel and a power transmission unit. A spool is disposed to be rotatable in the driving wheel. The spool winds a webbing which restrains an occupant. The power transmission unit transmits power to the driving wheel during an emergency. The power transmission unit includes a resin-made long body, a pipe and a gas generator. The resin-made long body rotates the driving wheel. The pipe contains the resin-made long body. The gas generator supplies an operation gas into the pipe. The resin-made long body discharged from the pipe is configured to rotate the driving wheel while the resin-made long body is wound around the driving wheel.
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