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Device for prevention of slap-back lock of inertia reel

  • US 5,794,878 A
  • Filed: 05/20/1997
  • Issued: 08/18/1998
  • Est. Priority Date: 05/20/1997
  • Status: Expired due to Term
First Claim
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1. A seat restraint system used to protect a seat occupant from sudden decelerations, the seat restraint system comprising:

  • a supporting frame having two opposite walls;

    an inertia reel mounted on said supporting frame, said inertia reel havinga cylindrical spool,a shaft having a first and a second opposite ends, said shaft supporting said spool and said two opposite ends of said shaft being mounted on said two opposite walls of said supporting frame such that said spool and said shaft rotate on a perpendicular axis to said two opposite walls;

    a webbing attached to said shaft, said webbing being reeled or unreeled around said spool depending on the direction of the rotation of said spool;

    a damping disk attached to said first opposite end of said shaft;

    a spring cup having at least one wall, said spring cup being attached to said supporting frame and having a spring having a first end attached to said spring cup and a second end attached to said first opposite end of said shaft proximate said damping disk such that said spring creates rotational force to cause said spool to rotate;

    a damping housing having a wall attached to said at least one wall of said spring cup forming a damping chamber between said at least one wall of said spring cup and said wall of said damping housing encasing said damping disk; and

    wherein said damping chamber is filled with a high viscosity fluid which causes a fluid damping force against said damping disk when said damping disk is rotated.

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