Planar blank and a coil spring manufactured therefrom
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United States of America Patent
Stats
-
Aug 2, 1988
Grant Date -
N/A
app pub date -
Mar 31, 1986
filing date -
Apr 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A planar blank is provided which permits the manufacture of a coil spring suitable for implantation. The blank has an elongated, essentially straight mid section which at its ends passes over into sections that are bent in the plane of the blank in opposite directions to form a blank having Z-shape. A coil spring made from the blank (in which the spring material as seen in cross section has radially flattened shape) at its ends has a lower pitch than the mid section or no pitch at all.
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