Composite coil spring
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United States of America Patent
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Jun 13, 2017
Grant Date -
Jul 23, 2015
app pub date -
Aug 17, 2012
filing date -
Jul 18, 2012
priority date (Note) -
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Abstract
A composite coil spring (20) includes a coil body (2) that extends along a coiled axis (24). The coil body includes a core (38) and a plurality of fiber layers (32) impregnated with a polymer material. The plurality of fiber layers are arranged around the core at different radial distances from the coiled axis. Each of the plurality of fiber layers extends around the coiled axis at an oblique fiber angle to the coiled axis. Each of the plurality of fiber layers includes a number of fibers that is a product of a common base number of fibers multiplied by a positive non-zero integer from a set of positive non-zero integers. The positive non-zero integer of at least one of the plurality of fiber layers is different from the positive non-zero integer of at least one other of the plurality of fiber layers.
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