Crank variable-speed gear device for increasing rotational power

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12195135
APP PUB NO 20220024540A1
SERIAL NO

17296537

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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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Patent Owner(s)

Patent OwnerAddress
SPEEDTECH CO LTD(SANGPAE-DONG) 1-1 144 SAMYUKSA-RO 692BEON-GIL DONGDUCHEON-SI GYEONGGI-DO 11341
HAN JANG YOUNG9-9 ARAETSEOBAL-GIL YEONGDO-GU (DONGSAM-DONG TAEJONG-YEONLIP) 202 BUSAN 49126

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Han, Jang Young Busan, KR 1 0
Seo, Dal Won Siheung-si, KR 3 2

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