Lubricating fluid composition for dynamic pressure bearing
AssigneesSankyo Seiki Mfg. Co., Ltd., Taiho Industries Co., Ltd.
InventorsMasamichi Hayakawa, Toshihiro Kobayashi, Kazuya Shimizu, Yuusuke Matsumura, Masuhiro Onoyama, Katsumi Nagano
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Abstract
A lubricating fluid composition for dynamic pressure bearings which supports a shaft by dynamic pressure, said lubricating fluid composition comprising fine magnetic particles dispersed in a base oil solvent, to which solvent is added an amine anti-gelling agent.
Claims17
A lubricating fluid composition for dynamic pressure bearings which supports a shaft by dynamic pressure, said lubricating fluid composition comprising:
- fine magnetic particles dispersed in a base oil solvent selected from the group consisting of a dialkylcarbonate (ROCOOR), wherein R is a C.sub.5-20 alkyl group, a hydrogenated poly-.alpha.-olefin (PAO) and a polyol ester, to which is added an amine anti-gelling agent.
A lubricating fluid composition for dynamic pressure bearings which supports a shaft by dynamic pressure, said lubricating fluid composition comprising:
- fine magnetic particles dispersed in a base oil solvent to which an amine anti-gelling agent is added, said solvent being a member selected from the group consisting of:
- (i) at least one dialkylcarbonate (ROCOOR), wherein R is a C.sub.5-20 alkyl group,
- (ii) a mixture of said dialkylcarbonate (i) and a hydrogenated poly-.alpha.-olefin, and
- (iii) a mixture of a hydrogenated poly-.alpha.-olefin and a polyol ester.
Dependencies are inferred from the claim text.