Two-speed wheel assembly for manual wheelchairs, w

专利名称：Two-speed wheel assembly for manual

wheelchairs, with a quick-release mountingcapability

发明人：Stephen M. Meginniss, III,Wendell G. Matas申请号：US099576申请日：20010914公开号：US06805371B2公开日：20041019

专利附图：

摘要：A wheel assembly for a wheelchair having a number of structural features,including a two-gear arrangement, in which one gear is a hypocycloidal gear providing a

gear ratio lower than 1:1. A shift member is located on the wheel assembly with handoperated shift portions of the shift member, the shift member capable of movinglaterally (perpendicular to the axle) of the wheel between two positions. The shiftmember can be moved by the user while seated in the wheelchair. The wheel assemblyincludes a hand rim which is connected to a housing within which is a gear assembly. Thegear assembly includes two spaced cage plates which are joined by fixed shafts havingunidirectional rollers positioned thereon around the periphery thereof. The rollers havean exterior surface portion which engages with the interior surface of the housing in sucha way as to readily permit movement in the forward direction, but to prevent movementin the rear direction, unless the hand rims are used to rotate the housing relative to thegear assembly. The cage plate structure has rubbing elements which interact with theinterior surface of the housing to produce an additional braking force for downhillterrain.

申请人：MAGIC WHEELS, INC

代理机构：Jensen & Puntigam, P.S.

更多信息请下载全文后查看