Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1988-03-17
1989-03-14
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074R, B60R 2238, B60R 2240
Patent
active
048119121
ABSTRACT:
A seat belt retractor having an emergency locking mechanism that includes a lock ring coupled by a pin and slot to a locking pawl comprises an automatic locking mechanism activated by rotation of the belt reel upon unwinding of a predetermined length of the belt from the reel for causing the locking pawl automatically to engage the ratchet wheel regardless of the rate of acceleration of the belt reel and thereby lock the reel against rotation in the unwinding direction and deactivated in response to rotation of the reel upon rewinding of a predetermined length of the belt onto the reel. The automatic locking mechanism includes an automatic actuator pawl mounted on the lock ring to pivot between an automatic locking position in engagement with the ratchet wheel and a non-locking position out of engagement with the ratchet wheel, an activating lever having an arm engageable with the actuator pawl, an over-center spring coupled to the activating lever and biassing it to a first position in which the arm moves the actuator pawl to the automatic locking position and also biassing it to a second position out of engagement with the actuator pawl, and a planetary gear train responsive to rotation of the belt reel for pivoting the activating lever between the first and second positions at predetermined points in the rotation of the reel.
REFERENCES:
patent: 4436255 (1984-03-01), Matsui et al.
patent: 4564154 (1986-01-01), Takada
patent: 4565338 (1986-01-01), Takada
patent: 4597546 (1986-07-01), Yamamoto
patent: 4726539 (1988-02-01), Schmidt et al.
patent: 4747562 (1988-05-01), Tsukamoto et al.
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