US 10,703,439 B2 · Bicycle sprocket

Abstract

A bicycle sprocket comprises a sprocket body and a plurality of sprocket teeth provided on an outer periphery of the sprocket body and including at least one first tooth and at least one second tooth. The at least one first tooth has a driving surface side and a non-driving surface side. The at least one first tooth has a bevel cut shape in the non-driving surface side. The bevel cut shape is configured to avoid initially engaging with a bicycle chain in a shifting operation where the bicycle chain shifts from an adjacent smaller bicycle sprocket to the bicycle sprocket. The at least one second tooth is configured to initially engage with the bicycle chain in the shifting operation. The at least one second tooth is disposed adjacent to the at least one first tooth in a circumferential direction with respect to a rotational center axis of the bicycle sprocket.

Claims21

Dependent claims

A bicycle sprocket comprising:

a sprocket body;
and
a plurality of sprocket teeth provided on an outer periphery of the sprocket body, the plurality of sprocket teeth including:
at least one first tooth having a driving surface side and a non-driving surface side, the at least one first tooth having a bevel cut shape in the non-driving surface side, the bevel cut shape being configured to avoid initially engaging with a bicycle chain in a shifting operation where the bicycle chain shifts from an adjacent smaller bicycle sprocket to the bicycle sprocket;
and
at least one second tooth configured to initially engage with the bicycle chain in the shifting operation, the at least one second tooth is disposed adjacent to the at least one first tooth in a circumferential direction with respect to a rotational center axis of the bicycle sprocket, wherein
the bevel cut shape is a surface portion that extends in an axial direction parallel to rotational center axis, the surface portion is a concave curved surface when viewed in the axial direction.

4 more elements

A bicycle sprocket comprising:

a sprocket body;
and
a plurality of sprocket teeth provided on an outer periphery of the sprocket body, the plurality of sprocket teeth including:
at least one first tooth having a driving surface and a non-driving surface opposite to the driving surface in a circumferential direction with respect to a rotational center axis of the bicycle sprocket, the driving surface extending in the circumferential direction from a first radially outermost edge with respect to the rotational center axis to a distal end that is connected to a root circle of the bicycle sprocket, the non-driving surface including a first non-driving surface portion and a second non-driving surface portion so that a ridge is formed between the first non-driving surface portion and the second non-driving surface portion, the first non-driving surface portion extending in the circumferential direction from the ridge to a second radially outermost edge with respect to the rotational center axis, the second radially outermost edge being different from the first radially outermost edge;
and
at least one second tooth configured to initially engage with the bicycle chain in a shifting operation where the bicycle chain shifts from an adjacent smaller bicycle sprocket to the bicycle sprocket, the at least one second tooth is disposed adjacent to the at least one first tooth in the circumferential direction,
wherein the first radially outermost edge of the driving surface is a radially outermost edge of the at least one first tooth.

4 more elements

A bicycle sprocket comprising:

a sprocket body;
and
a plurality of sprocket teeth provided on an outer periphery of the sprocket body, the plurality of sprocket teeth including:
at least one first tooth each of which has a driving surface, a non-driving surface opposite to the driving surface in a circumferential direction with respect to a rotational center axis of the bicycle sprocket, the driving surface extending in the circumferential direction from a first radially outermost edge with respect to the rotational center axis to a distal end that is connected to a root circle of the bicycle sprocket, the non-driving surface including a first non-driving surface portion and a second non-driving surface portion so that a ridge is formed between the first non-driving surface portion and the second non-driving surface portion, the first non-driving surface portion extending in the circumferential direction from the ridge to a second radially outermost edge with respect to the rotational center axis, the second radially outermost edge being different from the first radially outermost edge, a reference line extending in a radial direction with respect to the rotational center axis of the bicycle sprocket to pass through a tooth center of the at least one first tooth in the circumferential direction, and
a first angle made by the reference line and a non-driving side inclination reference line extending from the second radially outermost edge to the ridge being larger than 36 degrees,
wherein the first radially outermost edge of the driving surface is a radially outermost edge of the at least one first tooth.

3 more elements

Dependencies are inferred from the claim text.

Bicycle sprocket

Life of this patent

Bicycle sprocket

Life of this patent

Abstract

Claims21