Lubricating oil for fluid dynamic bearing and spindle motor equipped with the lubricating oil
US-2016319215-A1 · Nov 3, 2016 · US
Lubricating oil composition for protection of silver bearings in medium speed diesel engines
US9909079B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9909079-B2 |
| Application number | US-201314057788-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 18, 2013 |
| Priority date | Oct 18, 2013 |
| Publication date | Mar 6, 2018 |
| Grant date | Mar 6, 2018 |
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- Title
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Abstract
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Provided herein is a medium speed diesel engine crankcase lubricating oil composition comprising: (a) a major amount of an oil of lubricating viscosity; and (b) 0.15 to 2.0 weight percent of a silver lubricity borated fatty acid ester additive. Also provided is a method for reducing silver bearing wear and friction in medium speed diesel engines comprising lubricating said engine with said lubricating oil composition.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for reducing silver bearing wear and friction in a railroad diesel engine containing silver or silver surfaced bearing components, said method comprising lubricating said railroad diesel engine with a lubricating oil composition comprising: (a) a major amount of an oil of lubricating viscosity; and (b) 0.15 to 1.5 weight percent of a silver lubricity borated fatty acid ester, wherein the silver lubricity borated fatty acid ester is an ester of glycerol and a C 12 -C 22 carboxylic acid containing 0 to 3 double bonds. 2. The method of claim 1 wherein the silver lubricity borated fatty acid ester is borated glycerol monooleate. 3. The method of claim 1 wherein the silver lubricity borated fatty acid ester additive is present at 0.15 to 1.0 weight percent. 4. The method of claim 1 wherein the silver lubricity borated fatty acid ester additive is present at 0.15 to 0.5 weight percent. 5. The method of claim 1 wherein the silver lubricity borated fatty acid ester additive is present at 0.20 weight percent. 6. The method of claim 1 wherein the carboxylic acid is selected from the group comprising oleic, stearic, isostearic, palmitic, myristic, palmitoleic, linoleic, lanric, linolenic, and eleostearic acids. 7. The method of claim 6 wherein the carboxylic acid is oleic acid.
Assignees
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Classifications
of (cyclo)aliphatic oolycarboxylic acids · CPC title
- C10M129/70Primary
of monocarboxylic acids · CPC title
of (cyclo)aliphatic monocarboxylic acids · CPC title
Diesel engines · CPC title
Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title
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- What does patent US9909079B2 cover?
- Provided herein is a medium speed diesel engine crankcase lubricating oil composition comprising: (a) a major amount of an oil of lubricating viscosity; and (b) 0.15 to 2.0 weight percent of a silver lubricity borated fatty acid ester additive. Also provided is a method for reducing silver bearing wear and friction in medium speed diesel engines comprising lubricating sa…
- Who is the assignee on this patent?
- Li Yue Rong, Castile Kevin S, Palazzotto John Dominic, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C10M129/70. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 06 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).