Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1980-09-26
1982-05-11
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074A, A62B 3502, B65H 7548
Patent
active
043289339
ABSTRACT:
A seat belt retractor includes a belt reel rotated in the belt winding direction by a winding spring. An inertia actuated reel locking device acts to selectively lock the reel against belt unwinding rotation so that a load imposed on the belt during restraint of an occupant tends to tighten or spool down the wound-up belt stored on the reel. A belt clamp mechanism for limiting the extension of belt from the reel subsequent to reel lockup includes a lever pivotally mounted on the housing and having a belt clamping surface at one end thereof overlying the belt wound-up on the reel. A spring urges the lever to a normal position in which the belt clamping surface is spaced from the wound-up belt. The belt passes around a belt roller at the other end of the lever so that the imposition of occupant restraint load on the belt simultaneous with lockup of the reel by the inertia locking means forcibly pivots the lever to carry the belt clamping surface into clamping engagement of the belt wound upon the reel and thereby prevent belt from spooling off the reel.
REFERENCES:
patent: 384187 (1888-06-01), Blackman
patent: 3384415 (1968-05-01), Monroe
patent: 3471100 (1969-10-01), Arcari
patent: 3480228 (1969-11-01), Ulert
patent: 3482798 (1969-12-01), Kawaguchi
patent: 3942740 (1976-03-01), Torphammar et al.
patent: 4120466 (1978-10-01), Adomeit
patent: 4211377 (1980-07-01), Yasumatsu
patent: 4273301 (1981-06-01), Frankila
General Motors Corporation
Jillions John M.
Leahy Charles E.
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