A sprocket having a gear tooth valley radius which varies around the sprocket perimeter provides additional gear torque multiplication to a rider, which is especially beneficial when climbing hills. In some embodiments, the sprocket is a bicycle chainring with reduced gear tooth valley radius over at least a portion of the chainring. In other embodiments, the sprocket is a bicycle rear wheel cassette cog with increased gear tooth valley radius over at least a portion of the cassette cog. Regions of both reduced and increased gear tooth valley radius may be present on a given sprocket. The sprocket valley floor surface may be rounded or may include N segments adjoined by N vertices. The segments of the valley floor surface may be curved or straight. The vertices of the valley floor surface may be curved or angled. Embodiments for bicycles and motorcycles are presented.
SPROCKET WITH VARIABLE GEAR TOOTH VALLEY RADIUS
ZAHNRAD MIT VARIABLEM ZAHNFLANKENRADIUS
PIGNON AYANT UN RAYON DE VALLÉE DE DENT D'ENGRENAGE VARIABLE
05.07.2023
Patent
Elektronische Ressource
Englisch