- 专利标题： CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER
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申请号： US17296537申请日： 2019-11-08
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公开(公告)号： US20220024540A1公开(公告)日： 2022-01-27
- 发明人: Jang Young HAN , Dal Won SEO
- 申请人： Jang Young HAN , SPEEDTECH CO., LTD.
- 申请人地址： KR Busan; KR Dongducheon-si, Gyeonggi-do
- 专利权人： Jang Young HAN,SPEEDTECH CO., LTD.
- 当前专利权人： Jang Young HAN,SPEEDTECH CO., LTD.
- 当前专利权人地址： KR Busan; KR Dongducheon-si, Gyeonggi-do
- 国际申请： PCT/KR2019/015180 WO 20191108
- 主分类号： B62M11/14
- IPC分类号： B62M11/14 ; B62M11/18 ; B62M1/36 ; B62M3/00
摘要：
Disclosed is a crank variable-speed gear device (100) wherein the gear ratio can be increased to 1.6:1 to 1.8:1 through a gear assembly and a latch assembly, and the gear ratio can also be changed to 1:1, if necessary, thereby providing an excellent transmission efficiency, facilitating the manipulation thereof, and making it possible to provide a compact and lightweight bicycle.
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