Front chainring assembly
AssigneeSram, LLC
InventorsKevin Jasper, Isaiah Miller, Joshua Neiman
Life of this patent
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Abstract
A chainring assembly includes a chainring carrier adapted to be coupled to a crank arm. The chainring carrier is rotatable about a rotation axis and includes an outer periphery having carrier threads. A chainring structure includes an inner periphery having chainring threads and an outer periphery comprising a plurality of teeth. The inner periphery of the chainring structure is threadably engaged with the outer periphery of the chainring carrier. In one embodiment, a power meter device includes a body having a torque input section and a torque output section, with the torque output section including an outer periphery having threads adapted to be coupled to a chainring structure.
Claims9
A front chainring assembly comprising:
- a chainring carrier adapted to be coupled to a crank arm, wherein the chainring carrier is rotatable about a rotation axis extending in an axial direction, and wherein the chainring carrier comprises an outer periphery comprising carrier threads and an axial stop surface;
- and
- a chainring structure comprising an inner periphery comprising chainring threads and an outer periphery comprising a plurality of teeth and an axial face, wherein the inner periphery of the chainring structure is threadably engaged with the outer periphery of the chainring carrier, wherein the axial face comprises a plurality of circumferentially spaced axial projections separated by circumferentially spaced recesses, and wherein the chainring structure is rotatable relative to the chainring carrier between a disengaged position and an engaged position, wherein the circumferentially spaced axial projections engage the stop surface when the chainring structure is the engaged position.
Dependencies are inferred from the claim text.