Land vehicles – Wheeled – Attachment
Patent
1995-01-09
1996-01-30
Focarino, Margaret A.
Land vehicles
Wheeled
Attachment
297480, B60R 2246
Patent
active
054875633
ABSTRACT:
A pretensioner for vehicle seat belt systems comprises a belt-pulling member connected to a belt system component, a driving device for moving the belt-pulling member along a predetermined path in a direction to apply pretension to the belt, and a return-prevention device for preventing the belt-pulling member from moving in a direction such as to release the belt pretension. The return-prevention device includes a pawl coupled to the belt-pulling member, a support member having a set of ratchet teeth engageable by the pawl and a spring coupled to the pawl for biasing the pawl in a direction to engage it with a tooth of the set of ratchet teeth. The spring is a leaf spring having a base portion attached to the pawl and a tongue portion extending from the base portion and engageable with one of a series of ratchet teeth on the support member upon movement of the belt-pulling member and the pawl in the release direction. The spring tongue portion is arranged relative to the pawl and to the set of ratchet teeth that it engages such that when the pawl and leaf spring are displaced in the release direction, the tongue portion engages a ratchet tooth and is deformed and applies an increased force to the pawl.
REFERENCES:
patent: 4213652 (1980-07-01), Irwin et al.
patent: 4473242 (1984-09-01), Weman
patent: 5288105 (1994-02-01), Ikegaya et al.
Dickson Paul N.
Focarino Margaret A.
Takata Corporation
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