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US 6,142,900 AGranted
Sprocket with thin body and grooved teeth
AssigneeUni-Sunstar B.V.
InventorNorihiko Takamori
Life of this patent
Estimating the term…
Abstract
A sprocket includes a body, and teeth formed on the peripheral edge of the body. The teeth have a thickness greater than that of the body. This design enables the use of an existing chain and brings about a reduction in the weight of the overall sprocket.
Claims16
A sprocket comprising:
- a body having an axis and a peripheral edge;
- a plurality of circumferentially spaced teeth extending outwardly from said peripheral edge and defining therebetween a plurality of circumferentially spaced first recesses including respective bottoms partially defining said first recesses, and said teeth having respective peripheral walls;
- said teeth having a thickness greater than a thickness of said body;
- second recesses extending inwardly from said peripheral walls of said teeth, said second recesses being located substantially centrally of said teeth in a direction axially of said sprocket, and said second recesses being aligned and extending circumferentially;
- said bottoms of said first recesses having therein grooves that extend circumferentially and that are located substantially centrally of said bottoms in said direction axially of said sprocket;
- and
- said grooves of said bottoms of said first recesses and bottom portions of said second recesses being substantially aligned circumferentially and defining an annular groove extending entirely circumferentially of said sprocket.
4 more elements
A sprocket comprising:
- a substantially annular body having a first side, an opposite second side, a central axis extending centrally through said first and second sides, and a peripheral edge;
- a plurality of circumferentially spaced teeth extending outwardly from said peripheral edge and defining therebetween a plurality of circumferentially spaced first recesses including respective bottoms partially defining said first recesses;
- said plurality of teeth including:
- first steps extending axially outwardly from said first side of said body;
- first sides connected to said first steps and extending substantially parallel to said first side of said body;
- second steps extending axially outwardly from said second side of said body;
- second sides connected to said second steps and extending substantially parallel to said second side of said body;
- and
- peripheral walls extending circumferentially of said body and axially between respective said first sides and said second sides of said teeth;
- second recesses extending inwardly from said peripheral walls of said teeth, said second, recesses being located substantially centrally of said teeth in a direction axially of said sprocket, and said second recesses being aligned and extending circumferentially;
- said bottoms of said first recesses having therein grooves that extend circumferentially and that are located substantially centrally of said bottoms in said direction axially of said sprocket;
- and
- said grooves of said bottoms of said first recesses and bottom portions of said second recesses being substantially aligned circumferentially and defining an annular groove extending entirely circumferentially of said sprocket.
10 more elements
Dependencies are inferred from the claim text.