Electromagnetic seatbelt energy management devices

Details Electromagnetic seatbelt energy management devices Electromagnetic seatbelt energy management devices

2005-03-08

2005-03-08

Jullions, John M. (Department: 3654)

Winding, tensioning, or guiding

Reeling device

With spring motor

C242S381000, C280S806000, C188S161000

Reexamination Certificate

active

06863236

ABSTRACT:
An energy management device has a plurality of electromagnets positioned between a shaft and a seatbelt spool. When energized, the electromagnets move radially outwardly to engage the inside surface of a hub of the seatbelt spool. By adjusting the amount of current supplied to the electromagnets, the amount of friction, and thus the amount of energy dissipated, can be controlled. A D-ring can be supported on the cable which goes to a spool so that during a crash the ring moves forward as cable is pulled out of the spool which in turn is braked by the energy management device.

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