<p>A variable force spring that includes an elongated, pre-stressed strip of retractable spring material that is formed into coils and having a variation in cross- sectional mass along the length, hi one instance, the variation in cross-sectional mass along the length of the retractable spring is achieved by varying the width of the pre-stressed spring along its length.</p>
申请公布号
WO2009059178(A1)
申请公布日期
2009.05.07
申请号
WO2008US82050
申请日期
2008.10.31
申请人
KRIESEL, JOSHUA, W.;BIVIN, DONALD, B.;KRIESEL, MARSHAL, S.;LANGERUD, ALAN, D.
发明人
BIVIN, DONALD, B.;KRIESEL, MARSHAL, S.;KRIESEL, JOSHUA, W.;LANGERUD, ALAN, D.