Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1980-02-11
1981-08-25
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421076, A62B 3502, B65H 7548
Patent
active
042854792
ABSTRACT:
A seat belt retractor has a winding spring biasing a belt reel in the belt winding direction to pull the belt taut about the occupant. A first inertia-sensing means is adapted to sense a predetermined level of vehicle deceleration and lock the belt reel against belt unwinding rotation to restrain the occupant in the seat. Ratchet teeth carried by the reel in the belt winding direction are selectively engageable by a detent member. A control means is operable to move the detent member to a detenting position engaging ratchet teeth to prevent winding of the reel and thereby relieve the belt tension on the occupant by establishing a slackened belt condition about the occupant. A second inertia-sensing means senses a predetermined level of vehicle deceleration less than the level sensed by the first inertia-sensing means and is adapted to move the detent member to the undetenting position to restore the winding effort of the winding spring and pull the belt taut against the occupant prior to locking of the belt reel against belt unwinding rotation by the first inertia-sensing means.
REFERENCES:
patent: 3619524 (1971-11-01), Gillund
patent: 3869098 (1975-03-01), Sprecher
patent: 4002311 (1977-01-01), Fisher et al.
patent: 4066223 (1978-01-01), Takada
patent: 4153274 (1979-05-01), Rogers et al.
patent: 4165054 (1979-08-01), Collins
General Motors Corporation
Jillions John M.
Leahy Charles E.
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