公开(公告)号：US20230313064A1

公开(公告)日：2023-10-05

申请号：US18010601

申请日：2021-06-15

Applicant: KYB Corporation

Inventor： Shinji Kato

IPC: C10M129/74 ,  C10M169/04 ,  C10M129/76

CPC classification number: C10M129/74 ,  C10M129/76 ,  C10M169/04 ,  C10M2203/003 ,  C10M2207/2835 ,  C10N2040/08

Abstract: Provided are a lubricant composition for shock absorbers, a lubricant additive, and a method of adjusting frictional property of a lubricant composition for shock absorbers, each capable of satisfying both the steering stability and ride comfort. The lubricant composition for shock absorbers contains a base oil and pentaerythritol esters and having frictional property represented by the following formula (1):







RI
>
1
.75
×

F

ave


-
 
0
.05




­­­(1)







supposing that a ratio ({Fsa - Fave} / Fave) of a difference, at the time of minute amplitude, between a peak frictional force Fsa in transition from a stationary state to a sliding state and an average frictional force Fave to the average frictional force Fave at the time of minute amplitude is responsiveness RI.

公开(公告)号：US20230159845A1

公开(公告)日：2023-05-25

申请号：US17919810

申请日：2021-03-16

Applicant: KYB Corporation

Inventor： Shinji Kato

IPC: C10M129/74 ,  C10M169/04 ,  C10M129/76 ,  B60G13/08 ,  F16F9/32

CPC classification number: C10M129/74 ,  C10M169/04 ,  C10M129/76 ,  B60G13/08 ,  F16F9/3278 ,  C10M2203/003 ,  C10M2207/283 ,  C10M2207/289 ,  C10N2040/08

Abstract: Provided are a lubricant composition for shock absorbers, a lubricant additive, and a method of adjusting friction characteristics of a lubricant composition for shock absorbers, each capable of satisfying both the operational stability and ride comfort. The lubricant composition for shock absorbers contains a base oil and a friction adjusting agent, the friction adjusting agent contains pentaerythritol esters, and the pentaerythritol esters contain a pentaerythritol tetraester and a pentaerythritol ester other than the pentaerythritol tetraester.

公开(公告)号：US20180305634A1

公开(公告)日：2018-10-25

申请号：US15569542

申请日：2016-03-28

Applicant: KYB Corporation

Inventor： Christian Scholz ,  Yoshihiro Ito ,  Shinji Kato

IPC: C10M145/28 ,  C10M107/02 ,  C10M105/38

CPC classification number: C10M145/28 ,  C10M105/36 ,  C10M105/38 ,  C10M107/02 ,  C10M107/34 ,  C10M111/04 ,  C10M171/00 ,  C10M2203/1025 ,  C10M2205/0285 ,  C10M2207/026 ,  C10M2207/2805 ,  C10M2207/2825 ,  C10M2207/2835 ,  C10M2209/1033 ,  C10M2209/1055 ,  C10M2215/08 ,  C10M2215/223 ,  C10M2223/04 ,  C10M2223/041 ,  C10M2229/041 ,  C10N2220/022 ,  C10N2220/023 ,  C10N2220/032 ,  C10N2230/06 ,  C10N2230/36 ,  C10N2240/06 ,  C10N2240/08 ,  F16F9/32 ,  C10M2209/1065 ,  C10M2209/1085 ,  C10N2220/021 ,  C10M2209/1095

Abstract: [Problem]Provided is an operating oil for shock absorber in which influences against rubber materials are controlled.[Solution]An operating oil coming into contact with a rubber material, the operating oil containing a polyalkylene glycol and at least one base oil selected from a fatty acid diester, a poly-alfa-olefin, and a lubricating oil classified as GIII in American Petroleum Institute (API).[Effect]According to the operating oil, in view of the fact that swelling properties of a rubber material, such as a seal material, etc., are reduced, conventionally used rubber materials can be used without being changed.