US 12,420,889 B1
Sprocket assembly
Chi-Hui Su, Taichung (TW)
Assigned to SRAM, LLC, Chicago, IL (US)
Filed by SRAM, LLC, Chicago, IL (US)
Filed on Mar. 22, 2024, as Appl. No. 18/613,857.
Int. Cl. B62M 9/10 (2006.01); B23K 20/12 (2006.01); B23K 101/00 (2006.01)
CPC B62M 9/10 (2013.01) [B23K 20/12 (2013.01); B23K 2101/008 (2018.08)] 24 Claims
OG exemplary drawing
 
1. A sprocket assembly adapted for a bicycle, comprising:
a carrier having a central axis; and
a plurality of sprockets each having a different number of teeth and formed with a central through hole, the carrier extending into the central through hole of each of the sprockets such that the sprockets are disposed on an outer periphery of the carrier and are disposed along the central axis, at least one of the sprockets being coupled to the carrier by a weld that is formed via a solid-state welding technique,
wherein the carrier has at least one carrier working surface, the at least one of the sprockets having a sprocket working surface that is flush with the at least one carrier working surface across a junction between the at least one carrier working surface and the sprocket working surface of the at least one of the sprockets, the weld being formed at the junction.