Emergency locking retractor for vehicle seat belts

Details Emergency locking retractor for vehicle seat belts Emergency locking retractor for vehicle seat belts

1976-07-09

1977-11-08

Gilreath, Stanley N.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

A62B 3502, B65H 7548

Patent

active

040572005

ABSTRACT:
A seat belt retractor incorporates a fail-safe locking mechanism that is actuated by vehicle acceleration to lock a retractor drum against rotation in the belt unwinding direction. A pair of locking wheels are arranged coaxially with the drum for simultaneous rotation therewith, and a detent movable into and out of engagement with both locking wheels is biased, by biasing means such as a spring, into engagement therewith. Normally, the detent is restrained from engagement with the locking wheels against the force of the biasing means by an actuator associated with an inertial element constituting a part of acceleration sensing means. Upon displacement of the inertial element from its normal position of rest, the actuator permits the detent to move into engagement with the locking wheels by the force of the biasing means.

REFERENCES:
patent: 3819126 (1974-06-01), Stoffel
patent: 3850383 (1974-11-01), Lewis
patent: 3942739 (1976-03-01), Torphammar et al.

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