发明名称 Crutch for use on an icy surface
摘要 A conventional crutch having a ground engaging blunted tip member adapted to frictionally engage a finished ground surface. A second ground engaging member having a sharp tip adapted to be stuck into an icy surface is fixedly attached to and spaced from the crutch member. In one position, with the crutch assembly slanting downwardly and outwardly from the person, the point of the second member is above the ground surface. However, by rotating the crutch assembly 180 degrees from the first position, the point of the second member comes into ground engagement to firmly engage an icy surface. The blunted tip is compressible and the sharp tip is disposed slightly above the bottom of the compressible blunted tip when the crutch is disposed vertically with no weight applied thereto.
申请公布号 US4450850(A) 申请公布日期 1984.05.29
申请号 US19820373607 申请日期 1982.04.30
申请人 MCKENNA, WILLIAM A. 发明人 MCKENNA, WILLIAM A.
分类号 A61H3/02;(IPC1-7):A61H3/02 主分类号 A61H3/02
代理机构 代理人
主权项
地址