David K Prendergast

US Patent:

7790660, Sep 7, 2010

Filed:

Jan 28, 2005

Appl. No.:

11/045755

Inventors:

James Thomas Carey - Medford NJ, US
David K. Prendergast - Chester PA, US
Kevin J. Buzdygon - Wilmington DE, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C10M 129/70
C10M 133/16
C10M 133/44
C10M 133/12

US Classification:

508478, 508514, 508283, 508563

Abstract:

A polyalkylene glycol based lubricant composition that contains specified rust inhibitors and antioxidants has lowered operating temperature and is particularly suitable for use in worm drive gearboxes. The rust inhibitors consist of an N-acylo arcosine and an imidizole while the antioxidant consists of an alkylated diphenyl amine and a hindered phenol.

US Patent:

8623796, Jan 7, 2014

Filed:

May 27, 2011

Appl. No.:

13/117580

Inventors:

Evelyn N. Drake - Bernardsville NJ, US
Samuel C. Bainbridge - Philadelphia PA, US
David A. Blain - Cherry Hill NJ, US
James T. Carey - Medford NJ, US
L. Oscar Farng - Lawrenceville NJ, US
Suzzy C. Ho - Princeton NJ, US
David K. Prendergast - Chester PA, US
Martin N. Webster - Pennington NJ, US
Margaret M. Wu - Skillman NJ, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C10M 129/78

US Classification:

508459

Abstract:

This invention is directed to a lubricant composition that is comprised of a continuous phase and a discontinuous phase, i. e. , a two phase lubricant composition. The continuous phase and the discontinuous phase of the lubricant of this invention are oil or oil type compositions that are essentially insoluble in one another. The lubricant composition is comprised of a continuous phase base oil that is comprised of a low viscosity Group II, III, IV or GTL base stock or a blend of at least two of the Group II, III, IV and GTL base stocks, optionally including a low viscosity Group V base stock, with the continuous phase base oil having, independently, a viscosity of from 1 to 100 cSt at 100 C. The lubricant composition is further comprised of a discontinuous phase that is comprised of an ester composition having a mean average droplet size of from 0. 01 microns to 20 microns, in which the ester composition is comprised of an ester compound having no ether linkages.

US Patent:

20060276355, Dec 7, 2006

Filed:

Jun 6, 2006

Appl. No.:

11/447417

Inventors:

James Carey - Medford NJ, US
David Prendergast - Chester PA, US

International Classification:

C10M 105/38

US Classification:

508485000

Abstract:

A lubricant formulation and method of blending a lubricant formulation is disclosed. The lubricant formulation comprises at least two base stocks. The first base stock comprises a viscosity greater than 100 cSt, Kv100 C. The second base stock comprises a viscosity less than 10 cSt, Kv100 C. The lubricant formulation provides excellent micropitting protection for gears including large gears that are used in wind turbines. In addition, the lubricant may also have a viscosity greater than 38 cSt (Kv 100 C.), a viscosity index greater than 161 and micropitting protection level of a FVA 54 micropitting Test Fail Load Stage greater than 10.