Grease Composition And Rolling Device

Abstract: The present invention provides a grease composition which makes it possible to prevent deterioration in sealing properties even when base oil having a kinetic viscosity of as low as, for example, 5-40 mm2/s is used and which makes it possible to realize both sealing properties and a decrease in torque. The present invention also provides a rolling device. A sealing member (12a) comprises a plurality of sealing lips (114), (115), (116) each of which is made of an elastic material. A grease composition is sealed in void parts (121), (122) that are each located between a sliding surface of a slinger (106), on which the plurality of sealing lips slide, and two adjacent sealing lips. This grease composition contains base oil and a polar polymer. The polar polymer has a weight-average molecular weight of 5,000-140,000.

Patent Information

Application #

Filing Date

18 May 2023

Publication Number

31/2024

Publication Type

INA

Invention Field

CHEMICAL

Status

Email

Parent Application

Applicants

NSK LTD.

6-3, Ohsaki 1-chome, Shinagawa-ku, Tokyo 1418560

Inventors

1. ITO Azuma

c/o NSK Ltd., 5-50, Kugenumashinmei 1-chome, Fujisawa-shi, Kanagawa 2518501

2. MATSUMOTO Tomoaki

c/o NSK Ltd., 5-50, Kugenumashinmei 1-chome, Fujisawa-shi, Kanagawa 2518501

3. ASHIDA Haruhisa

c/o NSK-WARNER K.K., 2345, Aino, Fukuroi-shi, Shizuoka 4378545

Specification

Documents

Application Documents

#	Name	Date
1	202317034764.pdf	2023-05-18
2	202317034764-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [18-05-2023(online)].pdf	2023-05-18
3	202317034764-STATEMENT OF UNDERTAKING (FORM 3) [18-05-2023(online)].pdf	2023-05-18
4	202317034764-PROOF OF RIGHT [18-05-2023(online)].pdf	2023-05-18
5	202317034764-PRIORITY DOCUMENTS [18-05-2023(online)].pdf	2023-05-18
6	202317034764-POWER OF AUTHORITY [18-05-2023(online)].pdf	2023-05-18
7	202317034764-FORM 1 [18-05-2023(online)].pdf	2023-05-18
8	202317034764-DRAWINGS [18-05-2023(online)].pdf	2023-05-18
9	202317034764-DECLARATION OF INVENTORSHIP (FORM 5) [18-05-2023(online)].pdf	2023-05-18
10	202317034764-COMPLETE SPECIFICATION [18-05-2023(online)].pdf	2023-05-18
11	202317034764-FORM 3 [16-11-2023(online)].pdf	2023-11-16
12	202317034764-FORM 18 [12-06-2024(online)].pdf	2024-06-12