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公开(公告)号：US20200255086A1
公开(公告)日：2020-08-13
申请号：US16858747
申请日：2020-04-27
摘要： A bicycle includes a first gear provided between the front wheel and the rear wheel, a second gear provided on the rear wheel, a shaft having a third gear meshing with the first gear and a fourth gear meshing with the second gear, a coupling part for detachably coupling a gear crank for rotating the first gear and transmitting a driving force of the gear crank to the first gear, and a frame provided between the front wheel and the rear wheel, the frame having a right frame fixed to a right side of the rear wheel and a left frame fixed to a left side of the rear wheel, wherein the shaft has an area provided between the right frame and the left frame.
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公开(公告)号：US20240083535A1
公开(公告)日：2024-03-14
申请号：US18462517
申请日：2023-09-07
发明人： Mikio WATANABE
摘要： A ride-practicing bicycle includes: a pedal unit; a bicycle frame having a receiving portion for detachably receiving the pedal; a rear wheel having a sprocket; a chain, wherein the pedal unit includes a rotatably mounted pedal crank to which a chain wheel is attached and has a connecting portion that is connected to the receiving portion of the bicycle frame, and the chain bridges and engages the chain wheel and the sprocket of the rear wheel, whereby the pedal unit and the chain are removably installed in the bicycle frame, and wherein the bicycle frame has a seat stay on a side of the chain wheel, and an entirety or a portion of the seat stay is configured to be removable from the bicycle frame so as to facilitate attachment and removal of the pedal unit and the chain to and from the bicycle frame.
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公开(公告)号：US20230271666A1
公开(公告)日：2023-08-31
申请号：US18015063
申请日：2020-07-10
发明人： MIKIO WATANABE
摘要： A pedal unit attachable/detachable training bicycle that easily attach/detach a chain and a pedal unit to/from a training bicycle that has a seat stay. The pedal unit attachable/detachable training bicycle includes a bicycle frame having a receiving member provided at bottom of a seat tube to connect a pedal unit. The pedal unit, which is configured to detachably attach to the receiving member. A chain threaded between the pedal unit and a rear wheel. The bicycle frame is configured to enable a seat stay on side of the chain wheel to be freely attached to and detached from the bicycle frame.
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公开(公告)号：US20220411013A1
公开(公告)日：2022-12-29
申请号：US17622199
申请日：2020-06-29
发明人： MIKIO WATANABE
摘要： A training bicycle with a removably attachable pedal unit enabling adjustment of chain slack by a simple method is provided. The detachable pedal unit is configured to enable attachable/detachable connection of a pedal crank to a bicycle body. The pedal unit includes a unit body having a unit connector for rotatably retaining and fastening to a bicycle body a pedal crank axially supporting a chain wheel. A unit receiving member fixedly installed on the bicycle body to interconnect with the unit connector. A sliding adjustment mechanism provided on the unit receiving member and the unit connector to vary and fix mutual fore-aft connection position of the unit receiving member and the unit connector in order to adjust fore-aft connection position of the bicycle detachable pedal unit relative to the bicycle body and thereby adjusting the chain tension.
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