US 12,305,741 B2
Sprocket
Shoichiro Shimizu, Osaka (JP); and Yuta Watanabe, Osaka (JP)
Assigned to TSUBAKIMOTO CHAIN CO., Osaka (JP)
Filed by TSUBAKIMOTO CHAIN CO., Osaka (JP)
Filed on Jun. 23, 2023, as Appl. No. 18/213,350.
Prior Publication US 2024/0011549 A1, Jan. 11, 2024
Int. Cl. F16H 55/06 (2006.01); F16H 55/14 (2006.01); F16H 55/30 (2006.01)
CPC F16H 55/06 (2013.01) [F16H 55/14 (2013.01); F16H 55/30 (2013.01); F16H 2055/065 (2013.01); F16H 2055/306 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A sprocket comprising a sprocket body with a plurality of teeth on a circumferential surface thereof, and a cushion ring on at least one side face of the sprocket body,
the cushion ring having an outer circumferential surface for making contact with link plates of a chain, and
secured to the sprocket body without an adhesive layer,
wherein the cushion ring is made of a thermoplastic resin which comprises a polyester elastomer composed of acrylic rubber and polyester,
wherein the sprocket body comprises
a boss continuously formed at the at least one side face of the sprocket body and having an outer circumferential surface and a boss recessed portion that is set back from the outer circumferential surface, and
a through hole formed at the at least one side face of the sprocket body, and
wherein the boss recessed portion and the through hole are continuously formed extending through the at least one side face of the sprocket and filled with the thermoplastic resin of the cushion ring.