A sprocket (11) for engagement with a drive chain (15) comprises:• a plurality of teeth (12; 16) extending radially from a periphery of the sprocket (11);• the plurality of teeth (12; 16') including a first and a second group of teeth, wherein the teeth of the first group and the second group are alternately arranged so that each tooth (12) of the first tooth group is followed by a tooth (16') of the second group, and vice versa;• each tooth (12) of the first group of teeth having a first maximum width;• each tooth (16') of the second group of teeth having a second maximum width which is larger than the first maximum width, wherein each tooth (16') of the second group of teeth has a protrusion (17,18) on at least one lateral face of the tooth;In order to provide a sprocket with alternating narrow and wide teeth that has a low weight and remains functional in a muddy environment with a soiled chain, the outer lateral face of the protrusion (17, 18) extends over a first portion of the lateral face (19, 20) of each tooth (16') of the second group of teeth, wherein the length of the first portion is 50 % of the length of the respective tooth (16') or less. Each tooth (16') of the second group of teeth has a protrusion on each of the two lateral faces (19, 20) of the tooth (16'), wherein the protrusion on the first lateral face of each tooth (16') of the second group of teeth is located at a different location than the protrusion on the second lateral face of the respective tooth (16').
NARROW - WIDE TEETH CHAINRING
KETTENRING MIT SCHMALEN UND BREITEN ZÄHNEN
PLATEAU À DENTS LARGES/ÉTROITES
2024-02-14
Patent
Electronic Resource
English