CONSTANT-FORCE SPRING SYSTEMS
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United States of America Patent
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Issued Date -
Jan 30, 2014
app pub date -
Jul 27, 2012
filing date -
Jul 27, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Adjustable constant force spring systems are disclosed. An adjustable constant-force spring system includes first and second rolled metal strips and a spool. The first strip is rolled around a first axis. The first strip has an inner end adjacent the first axis and an outer end configured for selective attachment to a load. The second strip is rolled around the first axis such that the second strip overlaps the first strip. The second strip has an inner end adjacent the first axis and an outer end configured for selective attachment to the load. The spool is located on a second axis parallel to and spaced from the first axis. The spool is sized to enable the first strip to reroll around the spool.
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