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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0357767 (1989-05-26) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 6 인용 특허 : 2 |
A changeable speed gear attachment for bicycles. including the first gear for interconnection with the front sprocket of a standard bicycle, and a second gear for interconnection with the rear sprocket of a standard bicycle, is disclosed. Shifting means, comprising a plurality of gears and an associ
In a bicycle having a standard coaster brake and chain transmission the improvement comprising: a changeable speed transmission attachment mounted in housing means for protecting and housing said attachment; said housing means being mounted between upper and lower frame members having an apex at whi
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