<p>A mattress comprising asymmetrical coil springs with nonlinear spring rates provides comfort to users with different weights. The lower portion of the spring is cylindrical and the upper portion is conical or frustoconical. This arrangement causes the spring to undergo linear compression before undergoing nonlinear compression. The result is a mattress that is sufficiently soft for lighter users and sufficiently firm for heavier users.</p>
申请公布号
WO2009058251(A3)
申请公布日期
2010.01.14
申请号
WO2008US12198
申请日期
2008.10.28
申请人
DREAMWELL, LTD.;DEFRANKS, MICHAEL, S.;LYNN, JEREMY