Lubricating oil for fluid dynamic bearing and spindle motor equipped with the lubricating oil
US-2016319215-A1 · Nov 3, 2016 · US
Gear oil composition
US2016237368A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016237368-A1 |
| Application number | US-201415024546-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 11, 2014 |
| Priority date | Sep 30, 2013 |
| Publication date | Aug 18, 2016 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The present invention relates to a gear oil composition containing a base stock and at least 0.01 wt % of a friction reducing additive which comprises a glycerol and/or polyglycerol C 12 to C 24 saturated fatty ester. The gear oil composition is suitable for use in gear boxes in automotive, industrial and marine applications.
First claim
Opening claim text (preview).
1 . A gear oil composition comprising a base stock and at least 0.01 wt % of a friction reducing additive which comprises a glycerol and/or polyglycerol C 12 to C 24 saturated fatty ester. 2 . The gear oil composition as claimed in claim 1 comprising a glycerol and/or polyglycerol C 18 to C 22 saturated fatty ester. 3 . The gear oil composition as claimed in claim 1 comprising a glycerol and/or diglycerol fatty ester. 4 . The gear oil composition as claimed in claim 1 wherein the friction reducing additive is obtained by reacting glycerol and/or polyglycerol with a fatty acid and/or ester thereof. 5 . The gear oil composition as claimed in claim 4 wherein the fatty acid is isostearic acid and/or isobehenic acid. 6 . The gear oil composition as claimed in claim 1 wherein the friction reducing additive ester comprises a monoester and/or diester. 7 . The gear oil composition as claimed in claim 6 comprising at least 20 wt % of monoester, and/or at least 30 wt % of diester. 8 . The gear oil composition as claimed in claim 1 wherein the base stock is selected from the group consisting of an API Group I, II, III, IV, V base oil or mixtures thereof. 9 . The gear oil composition as claimed in claim 1 wherein the friction reducing additive reduces the coefficient of friction of the composition when measured by a mini-traction machine at a load of 1.0 GPa by at least 20%. 10 . A gear box comprising a gear oil composition as defined in claim 1 . 11 . The gear box as claimed in claim 10 comprising a spur, helical, bevel, hypoid and/or worm gear. 12 . A wind turbine comprising the gear box as claimed in claim 10 . 13 . A method of reducing friction in a gear box which comprises lubricating the gear box with the gear oil composition as defined in claim 1 . 14 . The method as claimed in claim 13 wherein the coefficient of friction of the gear oil composition when measured by a mini-traction machine at a load of 1.0 GPa is reduced by at least 20%. 15 . (canceled) 16 . (canceled)
Assignees
Inventors
Classifications
Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title
Waterproofing or water resistance · CPC title
Bearings · CPC title
Emulsion properties · CPC title
used as base material · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2016237368A1 cover?
- The present invention relates to a gear oil composition containing a base stock and at least 0.01 wt % of a friction reducing additive which comprises a glycerol and/or polyglycerol C 12 to C 24 saturated fatty ester. The gear oil composition is suitable for use in gear boxes in automotive, industrial and marine applications.
- Who is the assignee on this patent?
- Croda Int Plc
- What technology area does this patent fall under?
- Primary CPC classification C10M129/76. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 18 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).