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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10323205 B1

PDFFull Text
Date of Patent:
Jun. 18, 2019

Filed:

May. 05, 2016

Lubricant compositions for reducing timing chain stretch

Applicant:

Afton Chemical Corporation, Richmond, VA (US);

Inventors:

Kristin Fletcher, Richmond, VA (US);

William Y. Lam, Glen Allen, VA (US);

Assignee:

AFTON CHEMICAL CORPORATION, Richmond, VA (US);

Attorney:

Mendelsohn Dunleavy, P.C.

Primary Examiner:

Prem C Singh

Assistant Examiner:

Francis C Campanell

Int. Cl.
CPC ...
C07F 5/04 (2006.01); C10M 137/10 (2006.01); C10M 141/12 (2006.01); C10M 135/10 (2006.01); C10M 139/00 (2006.01); C10M 141/10 (2006.01); C10M 161/00 (2006.01); C10N 10/12 (2006.01); C10N 10/04 (2006.01); C10N 30/06 (2006.01);
U.S. Cl.
CPC ...
C10M 141/12 (2013.01); C10M 135/10 (2013.01); C10M 137/10 (2013.01); C10M 139/00 (2013.01); C10M 141/10 (2013.01); C10M 161/00 (2013.01); C10M 2205/028 (2013.01); C10M 2209/086 (2013.01); C10M 2215/28 (2013.01); C10M 2217/06 (2013.01); C10M 2219/044 (2013.01); C10M 2219/046 (2013.01); C10M 2223/045 (2013.01); C10M 2227/00 (2013.01); C10N 2010/04 (2013.01); C10N 2010/12 (2013.01); C10N 2030/06 (2013.01); C10N 2210/02 (2013.01); C10N 2210/06 (2013.01); C10N 2220/022 (2013.01); C10N 2230/06 (2013.01); C10N 2230/52 (2013.01); C10N 2240/10 (2013.01); C10N 2240/104 (2013.01); C10N 2260/09 (2013.01); C10N 2260/14 (2013.01); F02B 2275/08 (2013.01);
Abstract

A method for reducing timing chain stretch in an engine comprising a step of lubricating said timing chain with a lubricating oil composition that includes a major amount of a base oil; and a minor amount of an additive package including (a) at least one overbased calcium detergent, (b) at least one borated dispersant, (c) a metal dialkyl dithiophosphate, and (d) at least one molybdenum compound. The lubricating oil composition has a TBN value of at least 7.5 mg KOH/g of the lubricating oil composition, at least 80 ppm of molybdenum, based on the total weight of the lubricating oil composition, a weight ratio of total calcium in the lubricating oil composition to total molybdenum in the lubricating oil composition of less than 8.4; and a weight ratio of nitrogen from the dispersant in the lubricating composition to total boron in the lubricating oil composition of from 2.6 to 3.0.

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