Process for forming improved carbon fiber reinforced composite coil spring
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United States of America Patent
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Apr 19, 1983
Issued Date -
N/A
app pub date -
Sep 24, 1980
filing date -
Jan 15, 1979
priority date (Note) -
Expired
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Abstract
A carbon fiber reinforced composite coil spring is provided which is made from a braid formed of carbon fibers oriented at a preferred angle to the braid axis of approximately plus or minus 45.degree. and impregnated with a resin which serves as a substantially continuous matrix phase. Longitudinal reinforcing fiber may be incorporated into the braid to prevent it from straightening under longitudinal tension. The carbon fiber reinforced composite coil spring is formed by wrapping the braid, impregnated with a non-solidified resin, within a groove which extends helically along the surface of a helical mandrel and solidifying the resinous matrix material, and then removing the solid composite coil spring from the helical mandrel.
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