US 12,304,592 B2
Bicycle eccentric pulley wheel
Huang-Kun Ma, Taichung (TW)
Filed by Huang-Kun Ma, Taichung (TW)
Filed on Jan. 11, 2024, as Appl. No. 18/410,048.
Claims priority of application No. 112201198 (TW), filed on Feb. 10, 2023.
Prior Publication US 2024/0270347 A1, Aug. 15, 2024
Int. Cl. B62M 9/08 (2006.01); B62M 9/121 (2010.01); B62M 9/126 (2010.01)
CPC B62M 9/08 (2013.01) [B62M 9/085 (2013.01); B62M 9/121 (2013.01); B62M 9/126 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A bicycle eccentric pulley wheel, characterized in that the bicycle eccentric wheel comprises a chainring, a bearing, and at least one side cover, wherein the chainring is rotatably mounted on the bearing, and the at least one side cover is fixed on the bearing, wherein the at least one side cover is a hollow disk comprising an annular flange extended longitudinally, an inner side of the annular flange comprises a raised portion facing towards a center of the at least one side cover, the raised portion has an eccentric hole, and the eccentric hole offsets from the center of the at least one side cover, wherein
a distance from the eccentric hole to the center of the at least one side cover is between 0.1 to 0.8 times of a distance from an outer perimeter of the annular flange to the center of the at least one side cover, and
at least one engaging portion protrudes longitudinally along a part of the at least one side cover, the bicycle eccentric pulley wheel allows a derailleur cage to be assembled with the chainring having a radius greater than a distance from the center to connected ends of the derailleur cage.