Suspension coil spring
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United States of America Patent
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Jul 23, 2019
Grant Date -
Feb 18, 2016
app pub date -
Oct 27, 2015
filing date -
Aug 12, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.
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