Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1979-12-03
1981-01-20
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421076, 280802, A62B 3502, B65H 7548
Patent
active
042457980
ABSTRACT:
A seat belt retractor has a belt reel rotatably journaled on a housing. A ratchet plate carried by the reel has teeth facing in both the belt winding and unwinding directions. A lockbar is pivotally movable between a disengaged position allowing reel rotation and first and second ratchet engaging positions overcenter from one another with respect to the axis of reel rotation for engagement respectively with the unwinding facing and winding facing ratchet teeth. A support link supports the lockbar at the disengaged position for pivotal movement by an inertia sensor into engagement with the unwinding facing teeth to lock the reel against belt unwinding and thereby restrain the seated occupant. A handle permits reciprocal movement of the support link away from the ratchet plate to permit belt unwinding reel rotation which pivots the lockbar overcenter and establishes the lockbar for subsequent engagement with the belt winding facing teeth upon initiation of belt windup by the reel windup spring so that the belt is held at the extended length to facilitate occupant egress. Subsequent reciprocal movement of the support link by the handle permits belt winding reel rotation by the rewind spring to rewind the belt and return the lockbar overcenter to the normal position for subsequent pivotal movement by the inertia sensor.
REFERENCES:
patent: 4040645 (1977-08-01), Giffen et al.
patent: 4090735 (1978-05-01), Czernakowski
patent: 4135683 (1979-01-01), Stephenson et al.
patent: 4181326 (1980-01-01), Hollowell et al.
General Motors Corporation
Jillions John M.
Leahy Charles E.
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