Safety belt retractor

Details Safety belt retractor Safety belt retractor

1985-01-15

1986-07-01

Jillions, John M.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421074A, B60R 2238, B60R 2240, B60R 2246

Patent

active

045975442

ABSTRACT:
A safety belt retractor has a belt spool which is rotatably supported on a frame. A belt slack retightening mechanism is positively coupled to the belt spool to drive the belt spool in a direction upon occurrence of excessive deceleration of the vehicle. A blocking device is operable to block the belt spool from rotation. A control apparatus is provided to control the blocking device in response to acceleration of belt webbing withdrawal from the belt spool.
The control apparatus includes a control disc which is supported for limited relative rotation with respect to the belt spool. An inertial disc is coupled with the control disc for rotation therewith by a coupling. The coupling permits rotation of the inertial disc with respect to the control disc only upon the exceeding of a predetermined retightening rotational acceleration of the belt spool and control disc.

REFERENCES:
patent: 4083512 (1978-04-01), Rumpf

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