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US 8,092,329 B2Granted
Bicycle chain rings with ramps
AssigneeWick Werks, LLC
InventorsChristopher A. Wickliffe, Eldon Goates
Life of this patent
Estimating the term…
Abstract
Embodiments of the present invention include bicycle chain rings for bicycles having specially shaped ramps, tapers and profiled teeth for improved shifting performance. Additional embodiments of the bicycle chain rings of the present invention may be configured with one or more additional features formed within the chain rings including a transition slide, a tapered ramp face, a ramp bridge, a ramp lead, a trailing transition slide and a wear pin.
Claims18
A bicycle chain ring, comprising:
- ramps disposed about an inner surface of the bicycle chain ring for engaging one or more outer chain links of a bicycle chain during an up-shift, each ramp configured with a lifting surface and a ramp face;
- and
- at least one of the ramps further comprising a transition slide disposed along a leading edge of each ramp, the transition slide forming a bevel tapering the lifting surface back to the ramp face at an inner periphery of an inner opening of the chain ring.
A bicycle chain ring, comprising:
- a ramp formed on an inner surface of the bicycle chain ring, the ramp comprising a raised structure with a lifting surface perpendicular to a plane of the inner surface;
- a ramp face adjacent to the lifting surface, the ramp face forming a planar surface tapering a thickness of the bicycle chain ring in a radial direction;
- the lifting surface and ramp face configured for engaging one or more outer chain links of a bicycle chain during an up-shift;
- and
- a wear pin embedded within the raised structure and adjacent the lifting surface for minimizing wear to the lifting surface.
2 more elements
Dependencies are inferred from the claim text.