Handle-returning device for a cylinder lock assembly
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United States of America Patent
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-
Jun 10, 2014
Grant Date -
Sep 20, 2012
app pub date -
Mar 15, 2012
filing date -
Mar 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
In a handle-returning device of a cylinder lock assembly, a support base has an inner annular flange and an axial spring-retaining lug. A rotation driver has an inner tubular wall extending into the inner annular flange of the support base, and a spring driving element. A torsion spring is disposed around the inner annular flange and between the support base and the rotation driver, and has a spring leg abutting the spring-retaining lug and the spring driving element. A rotary plate abuts the support base opposite to the rotation driver, and has an engaging part engaging a tongue projecting from the rotation driver. A reinforced structure is thus provided to oppose high torsional stresses produced upon rotation of a lever handle.
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