Webbing lock device

Details Webbing lock device Webbing lock device

1981-11-30

1984-07-31

Levy, Stuart S.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

188 651, A62B 3502

Patent

active

044625545

ABSTRACT:
A webbing lock device in which an occupant restraining webbing extending from a takeup shaft of a retractor is clamped between a pair of clamping members by closing an interval therebetween, when an abrupt tensile force acts on the webbing as in the event of an emergency situation. Each of the clamping members has a corrugated surface on opposed side thereof and concave portions of one of the corrugated surfaces are disposed to correspond to convex portions of the other of the corrugated surfaces. An interval between the corrugated surfaces progressively decreases toward the takeup shaft along the longitudinal direction of the webbing, and the radius of the curvature of the corrugated surfaces, for example, is progressively smaller toward the takeup shaft, whereby clamping force to the webbing between the corrugated surfaces progressively increases toward the takeup shaft along the longitudinal direction of the webbing and there is no point where tensile force acting on the webbing abruptly decreases or increases to break the webbing.

REFERENCES:
patent: 3494571 (1970-02-01), Stoffel
patent: 4181273 (1980-01-01), Adomeit
patent: 4278215 (1981-07-01), Nakaho
patent: 4286759 (1981-09-01), Usami et al.
patent: 4319667 (1982-03-01), Motonami et al.
patent: 4371126 (1983-02-01), Tsuge et al.

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