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Locking device for seatbelt systems

  • US 4,243,185 A
  • Filed: 01/04/1979
  • Issued: 01/06/1981
  • Est. Priority Date: 03/28/1978
  • Status: Expired due to Term
First Claim
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1. A locking device for a seatbelt system comprising:

  • a fixed base having a wavy surface;

    a locking part having a wavy surface adjacent to said fixed base which under ordinary conditions is separated from the fixed base so that a passsenger-restraining seatbelt is allowed to pass freely between the locking part and the fixed base, said wavy surfaces of said fixed base and said locking part cooperating such that when said wavy surfaces approach each other, the seatbelt passing between said wavy surfaces is formed into a wavy shape to thereby clamp the seatbelt between said locking part and the fixed base when said locking part approaches said fixed base;

    an arm, one end of which contacts the seatbelt and which causes the locking part to approach the fixed base when the tension on the seatbelt exceeds a given value; and

    a coupling device which is installed between the arm and locking part and which will allow the locking part to rotate about a major axis of the seatbelt whereby the locking part is caused to press the seatbelt against the fixed base across the entire width of said seatbelt, said coupling device comprising a biasing means for biasing said locking part into contact with said arm.

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