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US3899432A Expired / Lapsed US ⏱️ 0.0 years remaining

All-purpose lubricating oil composition with anti-chatter characteristics for wet disc brakes

Assignee: Chevron USA Inc
•
Filing: 1974-06-03
•
Granted: 1975-08-12
•
Expires: 1994-06-03
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Abstract

Abstract Lubricating oil compositions are provided which comprise (A) a major amount of oil of lubricating viscosity, and (B) an effective amount of each of: (1) an oil-soluble substantially neutral Group II metal salt of a hydrocarbyl sulfonic acid; (2) an oil-soluble overbased Group II metal salt of a hydrocarbyl sulfonic acid; (3) an oil-soluble Group II metal salt of a dihydrocarbyl dithiophosphoric acid; (4) tricresyl phosphate; and (5) a sulfurized mixture of C10 25 olefins and fatty acid esters of C10 25 fatty acids and C1 25 alkyl or alkenyl alcohols, in an olefin-to-ester mol ratio of about 1-2:1 wherein the fatty acid and/or alcohol is unsaturated. These lubricating oil compositions are useful as functional fluids in a variety of systems. They are particularly useful in the hydraulic and gear box systems of large industrial and farm tractors providing excellent lubrication, increased braking capacity and reduced chatter of wet-type disc brakes.

Inventors

  • 👤 Kenneth Rothert
  • 👤 Donald D Dexter
  • 👤 Lester M Hartmann

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 13:23
CPC Classifications
C; C10; C10M; C10M163/00; C10M135/00; C10M135/02; C10M135/04; C10M135/06; C10M135/08; C10M135/10; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M159/00; C10M159/12; C10M159/20; C10M159/24; C10M2205/00; C10M2205/02; C10M2205/026; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/02; C10N2040/08

Claims Analysis

Total Claims: 36
Claim 1
Independent Claim 13 words
AN OIL-SOLUBLE SUBSTANTIALLY NEUTRAL GROUP II METAL SALT OF A HYDROCARBYL SULFONIC ACID,
Claim 2
Dependent Claim 13 words
AN OIL-SOLUBLE SUBSTANTIALLY NEUTRAL GROUP II METAL SALT OF A HYDROCARBYL SULFONIC ACID,
Claim 3
Dependent Claim 23 words
A LUBRICATING OIL COMPOSITION COMPRISING: A. A MAJOR AMOUNT OF AN OIL OF LUBRICATING VISCOSITY, AND B. AN EFFECTIVE AMOUNT OF EACH OF:
Claim 4
Dependent Claim 23 words
A LUBRICATING OIL COMPOSITION COMPRISING: A. A MAJOR AMOUNT OF AN OIL OF LUBRICATING VISCOSITY, AND B. AN EFFECTIVE AMOUNT OF EACH OF:
Claim 5
Dependent Claim 12 words
AN OIL-SOLUBLE OVERBASED GROUP II METAL SALT OF A HYDROCARBYL SULFONIC ACID,
Claim 6
Dependent Claim 12 words
AN OIL-SOLUBLE OVERBASED GROUP II METAL SALT OF A HYDROCARBYL SULFONIC ACID,
Claim 7
Dependent Claim 16 words
an oil-soluble overbased Group II metal salt of a hydrocarbyl sulfonic acid of the following formula:
Claim 8
Dependent Claim 16 words
an oil-soluble overbased Group II metal salt of a hydrocarbyl sulfonic acid of the following formula:
Claim 9
Dependent Claim 65 words
A lubricating oil composition of claim 1 wherein: A. said Group II metal of said Group II metal salt of a hydrocarbyl sulfonic acid is magnesium, calcium or barium, B. said Group II metal of said Group II metal salt of a dihydrocarbyl dithiophosphoric acid is zinc, and C. said fatty acid esters are derosinified tall oil esters of a C1-25 alkyl or alkenyl alcohol.
Claim 10
Dependent Claim 12 words
an oil-soluble overbased Group II metal salt of a hydrocarbyl sulfonic acid;
Claim 11
Dependent Claim 12 words
an oil-soluble overbased Group II metal salt of a hydrocarbyl sulfonic acid;
Claim 12
Dependent Claim 11 words
an oil-soluble Group II metal salt of a dihydrocarbyl dithiophosphoric acid;
Claim 13
Dependent Claim 11 words
an oil-soluble Group II metal salt of a dihydrocarbyl dithiophosphoric acid;
Claim 14
Dependent Claim 23 words
A lubricating oil composition comprising: A. a major amount of an oil of lubricating viscosity, and B. an effective amount of each of:
Claim 15
Dependent Claim 23 words
A lubricating oil composition comprising: A. a major amount of an oil of lubricating viscosity, and B. an effective amount of each of:
Claim 16
Dependent Claim 15 words
an oil-soluble Group II metal salt of a dihydrocarbyl dithiophosphoric acid of the following formula:
Claim 17
Dependent Claim 15 words
an oil-soluble Group II metal salt of a dihydrocarbyl dithiophosphoric acid of the following formula:
Claim 18
Dependent Claim 23 words
said sulfurized mixture of said olefins and said fatty acid esters is present in from 0.5 to 1.5 weight percent of said composition.
Claim 19
Dependent Claim 23 words
said sulfurized mixture of said olefins and said fatty acid esters is present in from 0.5 to 1.5 weight percent of said composition.
Claim 20
Dependent Claim 11 words
AN OIL-SOLUBLE GROUP II METAL SALT OF A DIHYDROCARBYL DITHIOPHOSPHORIC ACID,
Claim 21
Dependent Claim 11 words
AN OIL-SOLUBLE GROUP II METAL SALT OF A DIHYDROCARBYL DITHIOPHOSPHORIC ACID,
Claim 22
Dependent Claim 57 words
A lubricating oil composition of claim 3 wherein: a. M1 represents calcium, magnesium or barium, b. R2 and R3 each represent a hydrocarbyl group containing from 8 to 12 carbon atoms, c. M2 represents zinc, d. said olefin is a C11-C18 alpha-olefin and said fatty acid ester is a derosinified tall oil ester of a C10-20 alcohol.
Claim 23
Dependent Claim 3 words
tricresyl phosphate; and
Claim 24
Dependent Claim 3 words
tricresyl phosphate; and
Claim 25
Dependent Claim 3 words
tricresyl phosphate; and
Claim 26
Dependent Claim 3 words
tricresyl phosphate; and
Claim 27
Dependent Claim 3 words
TRICRESYL PHOSPHATE, AND
Claim 28
Dependent Claim 3 words
TRICRESYL PHOSPHATE, AND
Claim 29
Dependent Claim 36 words
A SULFURIZED MIXTURE OF C10-25 OLEFINS AND FATTY ACID ESTERS OF C10-25 FATTY AICDS AND C1-25 ALKYL OR ALKENYL ALCOHOLS, IN AN OLEFIN-TO-ESTER MOL RATIO OF ABOUT 1-2:1 WHEREIN THE FATTY ACID AND/OR ALCOHOL IS UNSATURATED.
Claim 30
Dependent Claim 36 words
A SULFURIZED MIXTURE OF C10-25 OLEFINS AND FATTY ACID ESTERS OF C10-25 FATTY AICDS AND C1-25 ALKYL OR ALKENYL ALCOHOLS, IN AN OLEFIN-TO-ESTER MOL RATIO OF ABOUT 1-2:1 WHEREIN THE FATTY ACID AND/OR ALCOHOL IS UNSATURATED.
Claim 31
Dependent Claim 36 words
a sulfurized mixture of C10-25 olefins and fatty acid esters of C10-25 fatty acids and C1-25 alkyl or alkenyl alcohols, in an olefin-to-ester mol ratio of about 1-2:1 wherein the fatty acid and/or alcohol is unsaturated.
Claim 32
Dependent Claim 36 words
a sulfurized mixture of C10-25 olefins and fatty acid esters of C10-25 fatty acids and C1-25 alkyl or alkenyl alcohols, in an olefin-to-ester mol ratio of about 1-2:1 wherein the fatty acid and/or alcohol is unsaturated.
Claim 33
Dependent Claim 36 words
a sulfurized mixture of C10-25 olefins and fatty acid esters of C10-25 fatty acids and C1-25 alkyl or alkenyl alcohol, in an olefin-to-ester mol ratio of about 1-2:1 wherein the fatty acid and/or alcohol is unsaturated.
Claim 34
Dependent Claim 36 words
a sulfurized mixture of C10-25 olefins and fatty acid esters of C10-25 fatty acids and C1-25 alkyl or alkenyl alcohol, in an olefin-to-ester mol ratio of about 1-2:1 wherein the fatty acid and/or alcohol is unsaturated.
Claim 35
Dependent Claim 96 words
A lubricating oil composition of claim 4 wherein: a. said neutral Group II metal salt of a hydrocarbyl sulfonic acid is present in from 1 to 6 weight percent of said composition; b. said overbased Group II metal salt of a hydrocarbyl sulfonic acid is present in from 1 to 6 weight percent of said composition; c. said Group II metal salt of a dihydrocarbyl dithiophosphoric acid is present in from 1 to 4.5 weight percent of said composition; d. said tricresyl phosphate is present in from 0.5 to 1.5 weight percent of said composition; and
Claim 36
Dependent Claim 120 words
A lubricating oil composition of claim 4 wherein: a. said neutral Group II metal salt of a hydrocarbyl sulfonic acid is present in from 1.4 to 4 weight percent of said composition; b. said overbased Group II metal salt of a hydrocarbyl sulfonic acid is present in from 1.4 to 4 weight percent of said composition; c. said Group II metal salt of a dihydrocarbyl dithiophosphoric acid is present in from 1.2 to 2.25 weight percent of said composition; d. said tricresyl phosphate is present in from 0.75 to 1.25 weight percent of said composition; and e. said sulfurized mixture of said olefins and said fatty acid esters is present in from 0.75 to 1.25 weight percent of said composition.

References Cited (Backward Citations)

US2916449A Cited
US3222284A Cited
US3377281A Cited
US3451930A Cited
US3627681A Cited
US3825495A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-08-11 1979-02-10 1979-08-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-08-11 1983-02-10 1983-08-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-08-11 1987-02-10 1987-08-12 $7700.00 Window Closed / Lapsed

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