Power spring configurations for a fastening device
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United States of America Patent
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Mar 17, 2015
Grant Date -
Sep 5, 2013
app pub date -
Mar 5, 2012
filing date -
Mar 5, 2012
priority date (Note) -
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Abstract
Power spring configurations for a spring energized fastening device includes a compact double torsion power spring and two opposed compact single torsion springs. Simplified structures to hold the springs in a stable pre-loaded position are disclosed. Each coil has forward extending arms including an angled portion and forward vertically coincident portions. The double torsion spring has a self-locking crossing geometry to hold a pre-loaded rest position. The opposed two springs have a bridge and a mandrel to hold the rest position. A lever presses arms of the spring between a striker and the coil including a compact nesting condition. A tab of the striker extends forward to provide a release edge and a positioning torque bias upon the striker.
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