发明授权
US5002297A Large diameter rigid lightweight fork and steering assembly for bicycles 失效
大直径刚性轻型叉车和自行车转向组件

  • 专利标题: Large diameter rigid lightweight fork and steering assembly for bicycles
  • 专利标题(中): 大直径刚性轻型叉车和自行车转向组件
  • 申请号: US412822
    申请日: 1989-09-27
  • 公开(公告)号: US5002297A
    公开(公告)日: 1991-03-26
  • 发明人: Gary G. Klein
  • 申请人: Gary G. Klein
  • 专利权人: Klein Gary G
  • 当前专利权人: Klein Gary G
  • 主分类号: B62K21/02
  • IPC分类号: B62K21/02 B62K21/06
Large diameter rigid lightweight fork and steering assembly for bicycles
摘要:
A light weight aluminum bicycle fork with positive feel and improved control in rough conditions, and is stiffer in torsional stiffness, fore and aft stiffness and side-to-side stiffness and has a higher overall rigidity than prior art forks. A large diameter steering tube has a bearing raceway seat formed therein and a very large diameter head tube has a corresponding bearing raceway seat formed in the lowered end thereof to receive, by way of a press-fit, aircraft-type torque tube bearings. An upper bearing assembly is seated in a raceway seat formed in the upper end of the head tube. Adhesive is used to maintain the bearings in position and prevent their loosening. A pair of large diameter crown miter tubes are welded to the lower end of the steering tube and a pair of large diameter, tapered, round blade tubes are welded to the crown miter tubes and have dropouts welded to the lower ends of the blades. A one-piece aluminum bar, neck and large diameter stem is provided. A tightening wedge and the stem have complementary camming surfaces which are at a shallow angle.
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