US 12,152,215 B2
Shock absorber lubricant composition, shock absorber, and method for adjusting frictional property of shock absorber lubricant
Shinji Kato, Tokyo (JP)
Assigned to KYB CORPORATION, Tokyo (JP)
Appl. No. 18/010,601
Filed by KYB Corporation, Tokyo (JP)
PCT Filed Jun. 15, 2021, PCT No. PCT/JP2021/022675
§ 371(c)(1), (2) Date Dec. 15, 2022,
PCT Pub. No. WO2021/256465, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-105938 (JP), filed on Jun. 19, 2020.
Prior Publication US 2023/0313064 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 129/74 (2006.01); C10M 129/76 (2006.01); C10M 169/04 (2006.01); C10N 40/08 (2006.01)
CPC C10M 129/74 (2013.01) [C10M 129/76 (2013.01); C10M 169/04 (2013.01); C10M 2203/003 (2013.01); C10M 2207/2835 (2013.01); C10N 2040/08 (2013.01); F16F 2224/04 (2013.01); F16F 2230/04 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A lubricant composition for shock absorbers, comprising:
a base oil, and
pentaerythritol esters which comprise a pentaerythritol tetraester and a pentaerythritol ester other than the pentaerythritol tetraester,
wherein a mixing ratio of the pentaerythritol tetraester in the pentaerythritol esters is 40% or more.