US 11,982,336 B2
Friction transmission belt
Mayu Esaka, Hyogo (JP); Yusuke Hemmi, Hyogo (JP); and Eyobashenafi Tessema, Hyogo (JP)
Assigned to Mitsuboshi Belting Ltd., Kobe (JP)
Appl. No. 17/763,929
Filed by Mitsuboshi Belting Ltd., Kobe (JP)
PCT Filed Sep. 25, 2020, PCT No. PCT/JP2020/036442
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/060536, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-174610 (JP), filed on Sep. 25, 2019; and application No. 2020-154074 (JP), filed on Sep. 14, 2020.
Prior Publication US 2022/0325777 A1, Oct. 13, 2022
Int. Cl. F16G 5/08 (2006.01); F16G 5/20 (2006.01)
CPC F16G 5/08 (2013.01) [F16G 5/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A frictional power transmission belt comprising:
a compression rubber layer that comprises a frictional power transmission surface at least a part of which can come into contact with a pulley and that is formed of a cured product of a rubber composition, and
a surface layer comprising a cured product of a rubber composition comprising a polyvinyl pyrrolidone-based resin and an elastomer component, wherein the surface layer is laminated on a surface of the frictional power transmission surface of the compression rubber layer and is configured to come into contact with the pulley.