Combined seat belt retractor and tensioner unit

Details Combined seat belt retractor and tensioner unit Combined seat belt retractor and tensioner unit

1994-10-21

1997-06-24

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

B60R 2246

Patent

active

056411316

ABSTRACT:
In a belt tensioner for vehicular seat belt restraining systems the belt reel (16) of a belt retractor is caused to rotate by a linear drive unit via a step-up gear. The linear drive unit comprises a burstproof cylinder tube (42) closed off at both ends and a hollow piston (44) shiftable therein. Within said hollow piston a pyrotechnical propelling charge (50) with an igniter (52) is accommodated. The belt tensioner is distinguished by its compact configuration, low weight and low-cost production as well as by the linear drive unit being safe to handle.

REFERENCES:
patent: 3220668 (1965-11-01), Martin
patent: 3386683 (1968-06-01), Howland
patent: 4434953 (1984-03-01), Gemar et al.
patent: 4508287 (1985-04-01), Nilsson
patent: 5443222 (1995-08-01), Modinger et al.

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