BICYCLE CHANGE-SPEED CONTROL (VERSIONS) Russian patent published in 2003 - IPC

FIELD: transport engineering. SUBSTANCE: invention relates to rear change-speed controls secured on wheel axle. Pull rod 34 gets out of base member 20 has slider 38 driven by cam 42 and arranged in base member 20. cam 42 is installed in base member 20 to engage with slider 38 so that turning of cam 42 causes retraction of pull rod 34 into base member 20. Nut 52 is installed on other end of pull rod 34. Base member 20 and nut 52 rigidly secured change-speed control 10 to ends F of wheel fork. Invention provides easy adjusting, mounting and removing change-speed control from bicycle frame without special tools. EFFECT: facilitated servicing. 14 cl, 10 dwg