Emergency locking seat belt retractor

Details Emergency locking seat belt retractor Emergency locking seat belt retractor

1979-09-11

1981-10-06

Jillions, John M.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421074B, A62B 3502, B65H 7548

Patent

active

042931061

ABSTRACT:
A vehicle seat belt retractor has a belt sensitive mechanism with a pawl which is thrown outwardly when a flywheel lags relative to the main shaft to engage an internally toothed wheel. The toothed wheel is received in a coaxial cup member having arms for engaging a lockbar which can engage ratchet wheels fast with the shaft to lock the reel. A spring between radial projections on the toothed wheel and the cup member maintains this in a predetermined angular relation and absorbs movement of the toothed wheel in excess of what is required to operate the lockbar. A pendulum can engage an externally toothed wheel on excessive retractor acceleration to hold this against rotation with the shaft and a resiliently flexible arm extending between this wheel and the flywheel then effects locking by retarding the flywheel. The arm permits the rotation of the flywheel to exceed that of the rotation of the externally toothed wheel.

REFERENCES:
patent: 3482799 (1969-12-01), Wrighton et al.
patent: 4135682 (1979-01-01), Mizuno
patent: 4148446 (1979-04-01), Sugar
patent: 4168810 (1979-09-01), Sack et al.

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