US 12,085,160 B2
Gear member
Reiko Okuno, Okayama (JP); Shinichi Hirono, Okayama (JP); Toshiyuki Kosuge, Okayama (JP); Heisuke Kobayashi, Saitama (JP); Shinya Kurihara, Tokyo (JP); and Katsuhiko Yazama, Tokyo (JP)
Assigned to SUMITOMO ELECTRIC SINTERED ALLOY, LTD., Okayama (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Appl. No. 17/754,827
Filed by SUMITOMO ELECTRIC SINTERED ALLOY, LTD., Okayama (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
PCT Filed Sep. 25, 2020, PCT No. PCT/JP2020/036460
§ 371(c)(1), (2) Date Apr. 13, 2022,
PCT Pub. No. WO2021/079685, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-192626 (JP), filed on Oct. 23, 2019.
Prior Publication US 2024/0060555 A1, Feb. 22, 2024
Int. Cl. F16H 55/08 (2006.01)
CPC F16H 55/0806 (2013.01) 8 Claims
OG exemplary drawing
 
1. A gear member comprising:
a tooth having a tooth surface, a portion of which has a profile that is an involute curve,
wherein in a cross-section of the tooth perpendicular to a face width direction,
the tooth has a depression, near a top land of the tooth, hollowed in the tooth surface relative to the involute curve, the depression being disposed closer to the top land than to a bottom land.