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Spring with inclinated force characteristic

The spring with inclinated force charactreristic is a special-type of flat-wire-spring, due to different pitches within the spring-body there are areas with stronger and weaker force-elongation-ratio.

The spring at its beginning is working in the weak areas (big movement, low force), at its end the strong areas are also working (small movement, big force).

This principle is ideal to build spring solutions with high functional integration, like a bumper that can handle a high movement and also a high load-capacity once it is compressed.