Grease composition and grease-filled wheel bearing
US-2017074326-A1 · Mar 16, 2017 · US
Grease composition-filled ball bearing, pivot assembly bearing including the ball bearing, and hard disk drive including the pivot assembly bearing
US10145417B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10145417-B2 |
| Application number | US-201715637118-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2017 |
| Priority date | Jun 30, 2016 |
| Publication date | Dec 4, 2018 |
| Grant date | Dec 4, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A ball bearing is filled with a grease composition. The grease composition contains a synthetic oil other than a synthetic hydrocarbon oil, a synthetic hydrocarbon oil, a mineral oil, and a urea compound. The synthetic oil other than the synthetic hydrocarbon oil is contained in an amount of 10% by mass or more and 60% by mass or less when the total of the synthetic oil other than the synthetic hydrocarbon oil, the synthetic hydrocarbon oil and the mineral oil is taken as 100% by mass.
First claim
Opening claim text (preview).
What is claimed is: 1. A ball bearing with a grease composition, the grease composition comprising a polyol ester oil, a poly-α-olefin, a mineral oil and a urea compound, wherein the polyol ester oil is contained in an amount of 10% by mass or more and 60% by mass or less when a total of the polyol ester oil, the poly-α-olefin and the mineral oil is 100% by mass. 2. The ball bearing according to claim 1 , wherein the grease composition comprises the polyol ester oil in an amount of 10% by mass or more and 30% by mass or less when the total of the polyol ester oil, the poly-α-olefin and the mineral oil is 100% by mass. 3. The ball bearing according to claim 2 , wherein the grease composition comprises the poly-α-olefin in an amount of 30% by mass or more and 70% by mass or less when a total of the poly-α-olefin and the mineral oil is 100% by mass. 4. The ball bearing according to claim 2 , wherein the grease composition further comprises an extreme pressure additive. 5. A pivot assembly bearing comprising the ball bearing according to claim 2 . 6. The ball bearing according to claim 1 , wherein the grease composition comprises the poly-α-olefin in an amount of 30% by mass or more and 70% by mass or less when a total of the poly-α-olefin and the mineral oil is 100% by mass. 7. The ball bearing according to claim 6 , wherein the grease composition further comprises an extreme pressure additive. 8. A pivot assembly bearing comprising the ball bearing according to claim 6 . 9. The ball bearing according to claim 1 , wherein the grease composition further comprises an extreme pressure additive. 10. A pivot assembly bearing comprising the ball bearing according to claim 9 . 11. A pivot assembly bearing comprising the ball bearing according to claim 1 . 12. A hard disk drive comprising the pivot assembly bearing according to claim 11 .
Assignees
Inventors
Classifications
Hard disk drives or the like · CPC title
used as base material · CPC title
Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm (G11B5/484 takes precedence) · CPC title
- F16C33/6633Primary
Grease properties or compositions, e.g. rheological properties · CPC title
Triaryl phosphates · CPC title
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Frequently asked questions
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- What does patent US10145417B2 cover?
- A ball bearing is filled with a grease composition. The grease composition contains a synthetic oil other than a synthetic hydrocarbon oil, a synthetic hydrocarbon oil, a mineral oil, and a urea compound. The synthetic oil other than the synthetic hydrocarbon oil is contained in an amount of 10% by mass or more and 60% by mass or less when the total of the synthetic oil other than the synthetic…
- Who is the assignee on this patent?
- Minebea Mitsumi Inc
- What technology area does this patent fall under?
- Primary CPC classification F16C33/6633. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 04 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).