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US 6,599,210 B1Granted
Sprocket
AssigneesSunstar Giken Kabushiki Kaisha, Uni-Sunstar B.V.
InventorsNorihiko Takamori, Jichu Oh
Life of this patent
Estimating the term…
Abstract
A sprocket has a mounting part for mounting on a wheel and a corrugated section provided with teeth for engagement with a chain such that the sprocket has a reduces volume and weight and allows for appropriate engagement with the chain by having the position of the sprocket agree with the position of the chain. The mounting part has a first raised section raised toward a one plate surface side and a second raised section raised toward another plate surface side with respect to a longitudinally central plane extending through a center of the sprocket so as to divide the total volume and weight of the sprocket into substantially equal sections. A flat top part of the first raised section having a mounting hole is on a level with a bottommost end surface of the sprocket.
Claims21
A sprocket comprising:
- a mounting part having a rotary axis and adapted to be mounted on a rotary member, said mounting part having a first plate surface side and a second-plate surface side on opposing sides of a plane through said mounting part and perpendicular to the axis;
- and
- an outer peripheral part having teeth adapted to be engaged with a chain,
- wherein said mounting part comprises at least one first section raised on said first plate surface side and projecting away from said second plate surface side, and at least one second section raised on said second plate surface side and projecting away from said first plate surface side, so as to lessen an occurrence of distortion or curving due to hardening, and
- wherein a top portion of said at least one first section and a top portion of said at least one second section are level with a bottommost end surface and an uppermost end surface of said outer peripheral part, respectively.
2 more elements
A sprocket comprising:
- a mounting part having a rotary axis and adapted to be mounted on a rotary member, said mounting part having a first plate surface side and a second plate surface side on opposing sides of a plane through said mounting part and perpendicular to the axis;
- and
- an outer peripheral part having teeth adapted to be engaged with a chain,
- wherein said mounting part comprises at least one first section raised on said first plate surface side and projecting away from said second plate surface side, and at least one second section raised on said second plate surface side and projecting away from said first plate surface side, so as to lessen an occurrence of distortion or curving due to hardening,
- wherein said outer peripheral part is provided with a corrugated section having a plurality of folds and a plurality of top portions, said corrugated section having amplitude in a thickness direction of said outer peripheral part and extending along a peripheral direction of said outer peripheral part, and one of said teeth is formed at least at an outer edge part of each of said plurality of top portions between an adjacent pair of said plurality of folds of said corrugated section, and
- wherein a pitch of at least one of said plurality of folds between an adjacent pair of said plurality of top portions of said corrugated section is set to be different from a pitch of another fold between another adjacent pair of said plurality of top portions, and one of said teeth is formed at an outer edge portion in an intermediate position of said at least one of said plurality of folds between said adjacent pair of said plurality of top portions.
3 more elements
A sprocket comprising:
- a mounting part having a rotary axis and adapted to be mounted on a rotary member, said mounting part having a first plate surface side and a second plate surface side on opposing sides of a plane through said mounting part and perpendicular to the axis;
- and
- an outer peripheral part having teeth adapted to be engaged with a chain,
- wherein said mounting part is unitary and comprises at least one first section raised on said first plate surface side and at least one second section raised on said second plate surface side, so as to lessen an occurrence of distortion or curving due to hardening,
- wherein said outer peripheral part is provided with a corrugated section having a plurality of folds and a plurality of top portions, said corrugated section having amplitude in a thickness direction of said outer peripheral part and extending along a peripheral direction of said outer peripheral part, and one of said teeth is formed at least at an outer edge part of each of said plurality of top portions between an adjacent pair of said plurality of folds of said corrugated section, and
- wherein a pitch of at least one of said plurality of folds between an adjacent pair of said plurality of top portions of said corrugated section is set to be different from a pitch of another fold between another adjacent pair of said plurality of top portions, and one of said teeth is formed at an outer edge portion in an intermediate position of said at least one of said plurality of folds between said adjacent pair of said plurality of top portions.
3 more elements
Dependencies are inferred from the claim text.