Stretchable belt and process for the production thereof

Details Stretchable belt and process for the production thereof Stretchable belt and process for the production thereof

1985-05-24

1987-05-05

Reger, Duane A.

Brakes

Plastic deformation or breakage of retarder element

280805, 297472, A62B 3500

Patent

active

046624872

ABSTRACT:
A stretchable belt, such as for safety belt restraint systems in vehicles, includes a base material and at least one additional material having a different stress-stretch curve. By providing a base material with higher deformability than the additional material the stress-stretch curve of the belt has a first steeply rising portion where the load is primarily transmitted to the additional material. At a given load point, the additional material abruptly tears, and the load is transmitted to the base material. Thereafter, the stress versus stretch curve continues at a substantially lower angle. In this manner, the belt absorbs a maximum amount of energy for a given maximum load and maximum stretch. The belt may be formed from a single type of raw material, mechanically or thermally treating it to provide different stress versus stretch characteristics for the base material and the additional material.

REFERENCES:
patent: 3820843 (1974-06-01), Seo et al.
patent: 4126356 (1978-11-01), Takada

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