Sprocket for chain
AssigneeTsubakimoto Chain Co.
InventorMasatoshi Sonoda
Life of this patent
Estimating the term…
Abstract
In a sprocket for a chain transmission, teeth are disposed around the circumference of the sprocket at intervals. Arc-shaped tooth gap bottoms are formed between adjacent teeth, and each tooth gap bottom is continuous with the facing tooth surfaces of its adjacent teeth. Each tooth is formed so that its thickness is greater than the thickness of an ISO tooth form and gradually becomes thinner from the pitch line toward the tooth head. At engagement of the chain with the sprocket, a roller first comes into contact with a back tooth surface so that polygonal movement is suppressed.
Claims4
A sprocket for a chain transmission having a plurality of teeth disposed circumferentially at intervals, adjacent teeth of said plurality having facing tooth surfaces and being connected by arc-shaped tooth gap bottoms, wherein, when the center of the tooth gap bottom corresponds with the center of the tooth gap bottom of an ISO tooth form, the tooth thicknesses, of inner portions of said teeth in the vicinity of the intersections of lines defining the angle subtended by the tooth gap bottom arcs of said ISO tooth form with said tooth surfaces, is thinner than the tooth thickness of said ISO tooth form, and the tooth thickness of outer portions of the teeth extending from said thinner inner portions to the tooth heads is thicker than the tooth thickness of said ISO tooth form, and gradually becomes thinner, proceeding from the sprocket pitch line to the tooth heads.
Dependencies are inferred from the claim text.