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Locking device for seatbelt systems

  • US 4,319,667 A
  • Filed: 07/15/1980
  • Issued: 03/16/1982
  • 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 frame;

    a rotatable base having a wavy surface supported on said frame;

    a locking part supported on said frame and having an arm provided with a wavy surface adjacent to said rotatable base which under ordinary conditions is separated from the rotatable base so that a passenger-restraining seatbelt is allowed to pass freely between the locking part and the rotatable base, said wavy surfaces of said rotatable base and of said arm 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 rotatable base, said arm contacting the seatbelt to cause the locking part to approach the rotatable base when the tension on the seatbelt exceeds a given value;

    means for resiliently securing the rotatable base at a predetermined position where the passenger restraining seatbelt is allowed to pass freely between the locking part and the rotatable base; and

    a coupling device which will allow the arm to rotate about a minor axis which is transverse to the length of the seatbelt whereby the locking part is caused to press the seatbelt against the rotatable base across the entire width of said seatbelt.

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