BICYCLE DERAILLEUR GEAR (VERSIONS) Russian patent published in 2003 - IPC

FIELD: transport engineering. SUBSTANCE: invention relates to rear derailleur gear of bicycle chains. Bracket 209 of derailleur gear is hinge secured of frame 204 for angular adjustment. Shock absorber 240 is installed between bracket 209 and frame 204 between two bosses which can turn relative to each other. According to one design version, one of bosses 230 is arranged on bicycle frame 204 and other boss 210, on bracket 209. Adjusting screw 250 can be installed in boss 210 of bracket to thrust against shock absorber 240. According to other design version, one of bosses is located on plate coupled by torsional spring with bracket, and other boss is located on bracket. Shock absorber is installed between bosses of plate and bracket. Adjusting screw is installed separately on plate with possibility of thrusting against frame. EFFECT: provision of protection of derailleur gear adjustable in angular position against impact loads. 15 cl, 6 dwg