Energy dissipator for motor vehicle safety belts
First Claim
1. Energy dissipator for motor vehicle safety belts, comprising a support adapted to be mounted at a vehicle anchorage point, a flanged reel on which the safety belt is wound in use of the dissipator and means for anchoring one end of the belt to the reel, wherein the improvement consists in the combination of two axially extending seatings at opposite ends of the reel, said seatings being screw-threaded with equal helical pitches of opposite directions, two correspondingly threaded bushes engaged with said threaded seatings, a shaft carried by the support, the bushes being mounted for axial sliding movement without rotation on said shaft, and means interposed between the two bushes for opposing by the dissipation of energy movement of the two bushes towards each other in the event of rotation of the reel caused by unwinding of the belt therefrom.
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Accused Products
Abstract
An energy dissipator for a vehicle safety belt includes a reel on which one end of the belt is wound and anchored, the reel having two internal screw threads of opposite pitch in which respective bushes are threaded, so that in the event of an unwinding force on the reel due to a tension in the belt, for example on impact, the bushes are screwed towards each other and squash a deformable element interposed between the bushes.
42 Citations
4 Claims
- 1. Energy dissipator for motor vehicle safety belts, comprising a support adapted to be mounted at a vehicle anchorage point, a flanged reel on which the safety belt is wound in use of the dissipator and means for anchoring one end of the belt to the reel, wherein the improvement consists in the combination of two axially extending seatings at opposite ends of the reel, said seatings being screw-threaded with equal helical pitches of opposite directions, two correspondingly threaded bushes engaged with said threaded seatings, a shaft carried by the support, the bushes being mounted for axial sliding movement without rotation on said shaft, and means interposed between the two bushes for opposing by the dissipation of energy movement of the two bushes towards each other in the event of rotation of the reel caused by unwinding of the belt therefrom.
Specification