公开(公告)号：US20100251514A1

公开(公告)日：2010-10-07

申请号：US12416201

申请日：2009-04-01

申请人： RANDAL P. GOLDBERG ,  DEAN F. HOORNAERT ,  DEEPAK R. KAPOOR ,  MARK W. ZIMMER

发明人： RANDAL P. GOLDBERG ,  DEAN F. HOORNAERT ,  DEEPAK R. KAPOOR ,  MARK W. ZIMMER

IPC分类号： B60B33/00

CPC分类号： B60B33/0028 ,  B60B33/0042 ,  B60B33/0049 ,  B60B33/0057 ,  B60B33/0068 ,  B60B33/0073 ,  Y10T16/1853

摘要： A caster assembly includes a primary wheel and a secondary wheel. As the caster assembly is rolled against and over an obstacle threshold, the secondary wheel is positioned to contact the obstacle threshold first. As the caster assembly begins to roll over the threshold, the secondary wheel lifts the caster assembly part way. As the caster assembly continues to roll over the threshold, the primary wheel contacts the threshold and lifts the caster assembly over the obstacle threshold. One or more secondary or primary wheels may be used. The secondary wheel or wheels may be positioned to remain within a sweep volume of the primary wheel as the caster assembly swivels around a caster swivel axis.

摘要翻译： 脚轮组件包括主轮和副轮。 当脚轮组件滚动并超过障碍物阈值时，辅助轮被定位成首先接触障碍物阈值。 当脚轮组件开始翻转阈值时，辅助轮将脚轮组件部分地提升。 当脚轮组件继续滚过阈值时，主轮接触阈值并将脚轮组件提升到障碍物阈值上。 可以使用一个或多个次轮或主轮。 当脚轮组件围绕脚轮旋转轴线旋转时，次轮或轮可被定位成保持在主轮的扫掠体积内。