Belt retractor with a belt pretensioner acting on the belt drum

Details Belt retractor with a belt pretensioner acting on the belt drum Belt retractor with a belt pretensioner acting on the belt drum

1993-07-08

1995-08-22

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

2423791, B60R 2246

Patent

active

054432227

ABSTRACT:
The belt retractor with a belt pretensioner acting on the belt drum (12) has a pyrotechnical piston and cylinder linear drive (22). A rack (32) adapted to be subjected to thrust is connected with the piston (28) of such linear drive (22). The rack (32) is able to be drivingly coupled with the belt drum by the intermediary of a step-up gear wheel transmission (34, 36, 44). After tensioning of the belt, tensions in the safety belt system are limited by plastic deformation of a torsion rod (38), and peak strain values are decreased.
The belt retractor is integrated with the belt pretensioner and the energy converter as a compact assembly.

REFERENCES:
patent: 3386683 (1968-06-01), Howland
patent: 4014479 (1977-03-01), Nilsson et al.
patent: 4162773 (1979-07-01), Wallin
patent: 4381084 (1983-04-01), Fohl
patent: 4423846 (1984-01-01), Fohl
patent: 4434953 (1984-03-01), Gemar et al.
patent: 5344095 (1994-09-01), Frei
Abstract of Japanese Publication No. JP3045446 to Tetsuo, published Feb. 27, 1991.

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