Plate spring with improved settlement behavior
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United States of America Patent
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Mar 20, 2007
Grant Date -
Feb 10, 2005
app pub date -
Jul 29, 2004
filing date -
Jul 29, 2003
priority date (Note) -
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Abstract
A plate spring of a substantially circular-ring-shaped form having a substantially externally conical upper side (12) and a substantially internally conical underside (13) between which there are positioned an outer annular edge (14) and an inner annular edge (15), wherein, in the unloaded condition, the surface layer (17) of the underside (13) comprises a higher inherent compressive stress than the surface layer (16) of the upper side (12).
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