Bicycle Chain Rings with Ramps
AssigneeWick Werks, LLC
InventorsChristopher A. Wickliffe, Eldon Goates
Life of this patent
Estimating the term…
Abstract
Disclosed are bicycle chain rings for bicycles having specially shaped ramps with lifting surfaces for improved up-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.
Claims13
A bicycle chain ring for engaging a bicycle chain with an outer plate directly contacting both a first pin and a second pin, each pin having a pin width, the bicycle chain ring comprising
- a plurality of ramps disposed about an inner surface of the bicycle chain ring,
- wherein each of the plurality of ramps is configured with a perpendicular surface perpendicularly extending from the inner surface and
- having a length greater than a combination of
- a separation distance of the first pin from the second pin and
- a pin width.
A bicycle chain ring, comprising a plurality of perpendicular surfaces disposed about an inner surface of the bicycle chain ring, each perpendicular surface configured to concurrently engage two or more load points of a bicycle chain below bicycle chain link pins, thereby initiating stable lift to the bicycle chain without assistance from chain ring teeth during an up-shift.
A bicycle chain ring, comprising a plurality of ramps disposed about an inner surface of the bicycle chain ring, wherein each of the plurality of ramps is configured with a perpendicular surface protruding from the inner surface and placed to engage and lift a bicycle chain during an up-shift, the perpendicular surface configured to engage the chain at two or more load points along a length of the chain at all times during the up-shift, the load points being directly under chain pivot axes.
Dependencies are inferred from the claim text.