Winding – tensioning – or guiding – Reeling device – With spring motor
Patent
1997-09-10
1998-11-03
Darling, John P.
Winding, tensioning, or guiding
Reeling device
With spring motor
280806, B60R 2246
Patent
active
058297049
ABSTRACT:
A rotary drive for a belt tensioner comprises a housing having at least two cylindrical recesses with adjacent wall parts of the housing limiting the recesses. The recesses have at least approximately the form of circle sectors. The rotary drive further comprises a pinion mounted rotatably in the housing, and at least two rotary pistons arranged opposite one another in a respective one of the recesses. The pistons are designed as cylindrical bodies having the form of circle sectors. Each piston extends over a circle arc which is significantly less than the circle arc over which each of the recesses extends, each of the pistons having side faces limiting the circle arc. Each piston is provided with external teeth adapted to engage the pinion. A pressure space is formed between one of the side faces of each of the pistons and the wall parts delimiting the corresponding one of the recesses. The pressure space is adapted to be supplied with a pressurized gas for driving the pistons.
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Darling John P.
TRW Occupant Restraint Systems GmbH
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