US3003968A - Method of hydraulic transmission of power - Google Patents
Method of hydraulic transmission of power Download PDFInfo
- Publication number
- US3003968A US3003968A US718403A US71840358A US3003968A US 3003968 A US3003968 A US 3003968A US 718403 A US718403 A US 718403A US 71840358 A US71840358 A US 71840358A US 3003968 A US3003968 A US 3003968A
- Authority
- US
- United States
- Prior art keywords
- glycol
- power
- hydraulic
- hydraulic transmission
- max
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims description 3
- 238000000034 method Methods 0.000 title claims description 3
- 239000012530 fluid Substances 0.000 claims description 13
- 230000003213 activating effect Effects 0.000 claims description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 239000003112 inhibitor Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 150000002334 glycols Chemical class 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- -1 polyoxyethylene Polymers 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 4
- 239000003607 modifier Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 150000005690 diesters Chemical class 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 description 1
- WGNKWSUGROGRKR-UHFFFAOYSA-N 2-(2-butanoyloxyethoxy)ethyl butanoate Chemical compound CCCC(=O)OCCOCCOC(=O)CCC WGNKWSUGROGRKR-UHFFFAOYSA-N 0.000 description 1
- AJMJPGWUPHIMKQ-UHFFFAOYSA-N 2-[2-(2-butanoyloxyethoxy)ethoxy]ethyl butanoate Chemical compound CCCC(=O)OCCOCCOCCOC(=O)CCC AJMJPGWUPHIMKQ-UHFFFAOYSA-N 0.000 description 1
- ZLBRIKBFTAESRO-UHFFFAOYSA-N 2-[2-(2-pentanoyloxyethoxy)ethoxy]ethyl pentanoate Chemical compound CCCCC(=O)OCCOCCOCCOC(=O)CCCC ZLBRIKBFTAESRO-UHFFFAOYSA-N 0.000 description 1
- DXYGJDUJLDXFOD-UHFFFAOYSA-N 2-[2-[2-(2-acetyloxyethoxy)ethoxy]ethoxy]ethyl acetate Chemical compound CC(=O)OCCOCCOCCOCCOC(C)=O DXYGJDUJLDXFOD-UHFFFAOYSA-N 0.000 description 1
- MBGINZGOPMLHQN-UHFFFAOYSA-N 2-[2-[2-[2-(2-acetyloxyethoxy)ethoxy]ethoxy]ethoxy]ethyl acetate Chemical compound CC(=O)OCCOCCOCCOCCOCCOC(C)=O MBGINZGOPMLHQN-UHFFFAOYSA-N 0.000 description 1
- FPPLOZYCGIGIMV-UHFFFAOYSA-N 2-[2-[2-[2-[2-(2-acetyloxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethyl acetate Chemical compound CC(=O)OCCOCCOCCOCCOCCOCCOC(C)=O FPPLOZYCGIGIMV-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 1
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- BDZGJPFBTVYBOA-UHFFFAOYSA-N ethene Chemical group C=C.C=C.C=C.C=C.C=C BDZGJPFBTVYBOA-UHFFFAOYSA-N 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- WISMOVLJXZVJTC-UHFFFAOYSA-N propanoic acid Chemical compound CCC(O)=O.CCC(O)=O.CCC(O)=O.CCC(O)=O WISMOVLJXZVJTC-UHFFFAOYSA-N 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M3/00—Liquid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single liquid substances
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
- C10M2215/065—Phenyl-Naphthyl amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/26—Amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
Definitions
- fluid compositions suitable for use in fluid pressure systems such as hydraulic brakes, shock absorbers, hydraulic jacks, hydraulic elevators, and the like.
- a hydraulic fluid composition to be satisfactory are, suitable viscosity, high boiling point, low freezing point, non-corrosiveness, limited swelling action on rubber, a relatively small coeflicient of expansion and physical and chemical stability over a wide temperature variation.
- compositions such as a lubricant, a solvent, a modifier and one or more oxidation and corrosion inhibitors.
- lubricants contained, for example, castor oil, certain polyalkylene glycols, alcohols, and glycol ricinoleates. 'lypical of such solvents are, for example, butyl alcohol, amyl alcohol, and esters of the glycols.
- the usual modifiers are, for example, the glycols; the anti-oxidants are compounds such as'the bisphenols and phenyl-alpha-naphthylamine; and the corrosion inhibitors may be borax or the like.
- the hydraulic fluid compositions of the present invention have the additional advantage of having a superior lubricity. This property keeps rubber fittings and hoses in a pliable state, thereby reducing cracking and failure of rubber parts due to loss of flexibility with age.
- corrosion and oxidation inhibitors may be added to further improve the characteristics of the fluids.
- from 0.2 to 1.0 percent of compounds usually employed as corrosion inhibitors may be employed.
- Some of the more common inhibitors for example Zinc alkyl, dithiophosphate, phenyl alpha-naphthylarnine, Agerite Resin D and the like, may be added.
- Well known oxidation inhibitors such as bisphenol A, the alkylor alkanolamines, and trialkanolamine may be used, but it has generally been found unnecessary to add the latter because of the superior stability and inertness of the polyoxyalkylene glycol esters themselves.
- polyoxyalkylene glycol diesters which may be employed in accordance with the present invention are, for example
- diethylene glycol dibutyrate triethylene glycol dibutyrate, tetraethylene glycol diacetate, pentaethylene glycol diacetate, pentaethylene glycol dipropionate, hexaethylene glycol diacetate, hexaethylene glycol dipropionate, triethylene glycol divalerate and the like.
- a diester having the formula i l R-OO (C H40)n-CR wherein R is an alkyl radical having from 1 to 4 carbon atoms, n is an integer from 1 to 6 and the total number of carbon atoms of the diester compound is at least 10.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Description
United States Patent F Patented: Oct. 10, 1961 wherein R is an alkyl radical having from 1 to 4 carbon atoms with from 2 to 3 carbon atoms being preferred, and n is an integer from 1- to 6 inclusive, with from 3 to 4 being preferred and the total number of carbon atoms must be at least 10, have the properties which meet the specific characteristic requirements of the present-day hydraulic fluids. The properties of some of these polyoxyalkylene glycol esters of the present invention are set forth in the following table in comparison with SAE 10 The present invention relates to fluid compositions and specification 70-R:
Diethylene Triethylene Tetraethyl- Property Glycol Di- Glycol Dlene Glycol SAE 70-R propionate propionate Dipropionate Reflux Boiling Point 525 F 300 min,
Flash Point 145 F.
700 1,800 max. 4.0 4.0. 0.049- 0005-0050.
Water Tolerance:
At -40 F mass 50 cc.
At 140 F pass pass ass 50 cc. Evaporation loss (percent 1oss). 32 percent." 23 percent 14 percent 80 percent max. Corrosion/loss in mgJsq. cm.:
Copper 0.50 max.
Brass 0.50 max.
Steel 0.20 max.
Aluminum 0.10 max.
Cast Iron.-. 0.20 max.
Tinned Iron 020 max.
more particularly to fluid compositions suitable for use in fluid pressure systems such as hydraulic brakes, shock absorbers, hydraulic jacks, hydraulic elevators, and the like.
It is well known in the art that certain specific characteristics are necessary in fluids which are to be used in such systems, which characteristics must all be present if the liquid is to function satisfactorily according to present-day standards. The individual characteristics may be found to be present in many compounds, but a single class of compounds having all of the characteristics in combination is extremely rare and heretofore thought to be non-existent.
The requirements of a hydraulic fluid composition to be satisfactory are, suitable viscosity, high boiling point, low freezing point, non-corrosiveness, limited swelling action on rubber, a relatively small coeflicient of expansion and physical and chemical stability over a wide temperature variation.
Heretofore, there have been proposed various multicomponent compositions such as a lubricant, a solvent, a modifier and one or more oxidation and corrosion inhibitors. Some of the prior art lubricants contained, for example, castor oil, certain polyalkylene glycols, alcohols, and glycol ricinoleates. 'lypical of such solvents are, for example, butyl alcohol, amyl alcohol, and esters of the glycols. The usual modifiers are, for example, the glycols; the anti-oxidants are compounds such as'the bisphenols and phenyl-alpha-naphthylamine; and the corrosion inhibitors may be borax or the like. These systerns have not been satisfactory in many instances. Therefore, it is an object of the present invention to provide a hydraulic fluid which consists of a single class of compounds as the hydraulic component and which substantially meets the combined requirements of todays hydraulic fluids. Further objects will become apparent from the following specifications and claims.
It has now been found that certain diesters of polyoxyethylene glycols having the formula It is thus apparent that the compounds of the present invention even without added solvents, modifiers, antioxidants or corrosion inhibitors, are capable of meeting the requirements as set forth by the Society of Automotive Engineers for hydraulic fluids.
The hydraulic fluid compositions of the present invention have the additional advantage of having a superior lubricity. This property keeps rubber fittings and hoses in a pliable state, thereby reducing cracking and failure of rubber parts due to loss of flexibility with age.
It is understood that minor amounts of corrosion and oxidation inhibitors may be added to further improve the characteristics of the fluids. Thus, for example, from 0.2 to 1.0 percent of compounds usually employed as corrosion inhibitors may be employed. Some of the more common inhibitors, for example Zinc alkyl, dithiophosphate, phenyl alpha-naphthylarnine, Agerite Resin D and the like, may be added. Well known oxidation inhibitors, such as bisphenol A, the alkylor alkanolamines, and trialkanolamine may be used, but it has generally been found unnecessary to add the latter because of the superior stability and inertness of the polyoxyalkylene glycol esters themselves.
The polyoxyalkylene glycol diesters which may be employed in accordance with the present invention are, for
example, diethylene glycol dibutyrate, triethylene glycol dibutyrate, tetraethylene glycol diacetate, pentaethylene glycol diacetate, pentaethylene glycol dipropionate, hexaethylene glycol diacetate, hexaethylene glycol dipropionate, triethylene glycol divalerate and the like.
We claim:
1. In a method of hydraulic transmission of power for activating pressure operated elements the improvement which comprises employing as the activating fluid a diester having the formula i l R-OO (C H40)n-CR wherein R is an alkyl radical having from 1 to 4 carbon atoms, n is an integer from 1 to 6 and the total number of carbon atoms of the diester compound is at least 10.
References Cited in the file of this patent UNITED STATES PATENTS 2,379,249 Muskat June 26, 1945 2,870,195 Heininger Ian. 20, 1959 2,886,590 Montgomery May 12, 1959 4 FOREIGN PATENTS 505,155 Canada Aug. 17, 1954 OTHER REFERENCES Glavis: Polymeric Additives for Synthetic Ester Lubricants, Ind. & Eng. Chem., vol. 42, No. 12, December 1950, pps. 244 1-45.
McTurk; Synthetic Lubricants, WADC Technical Re- 10 port 53-88 by Wright Air Dev. Center, Wright-Patterson Air Force Base, Ohio.
Claims (1)
1. IN A METHOD OF HYDRAULIC TRANSMISSION OF POWER FOR ACTIVATING PRESSURE OPERATED ELEMENTS THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE ACTIVATING FLUID A DIESTER HAVING THE FORMULA
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US718403A US3003968A (en) | 1958-03-03 | 1958-03-03 | Method of hydraulic transmission of power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US718403A US3003968A (en) | 1958-03-03 | 1958-03-03 | Method of hydraulic transmission of power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3003968A true US3003968A (en) | 1961-10-10 |
Family
ID=24885973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US718403A Expired - Lifetime US3003968A (en) | 1958-03-03 | 1958-03-03 | Method of hydraulic transmission of power |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3003968A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3914182A (en) * | 1970-01-20 | 1975-10-21 | Burmah Oil Trading Ltd | Hydraulic fluids |
| US3970574A (en) * | 1975-06-16 | 1976-07-20 | E. I. Du Pont De Nemours & Co. | Hydraulic brake fluid composition |
| US4192760A (en) * | 1977-07-23 | 1980-03-11 | Akzona Incorporated | Cooling agent mixture containing ethylene glycol monoacetate, ethylene glycol diacetate, and glycol monomethyl ether for low-temperature freezing processes |
| EP0750033A1 (en) * | 1995-06-23 | 1996-12-27 | BP Chemicals Limited | Hydraulic fluid composition |
| FR3083244A1 (en) * | 2018-07-02 | 2020-01-03 | Total Marketing Services | COMPOSITION FOR COOLING AND LUBRICATING A PROPULSION SYSTEM OF AN ELECTRIC OR HYBRID VEHICLE |
| US11820958B2 (en) | 2018-11-05 | 2023-11-21 | Totalenergies Onetech | Use of a diester to improve the anti-wear properties of a lubricant composition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2379249A (en) * | 1942-11-25 | 1945-06-26 | Pittsburgh Plate Glass Co | Heat transfer medium |
| CA505155A (en) * | 1954-08-17 | E. Walker Kenneth | Hydraulic fluid | |
| US2870195A (en) * | 1955-04-20 | 1959-01-20 | Monsanto Chemicals | Alkyl beta-alkoxypropionates |
| US2886590A (en) * | 1957-08-28 | 1959-05-12 | Gulf Research Development Co | Diester lubricant |
-
1958
- 1958-03-03 US US718403A patent/US3003968A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA505155A (en) * | 1954-08-17 | E. Walker Kenneth | Hydraulic fluid | |
| US2379249A (en) * | 1942-11-25 | 1945-06-26 | Pittsburgh Plate Glass Co | Heat transfer medium |
| US2870195A (en) * | 1955-04-20 | 1959-01-20 | Monsanto Chemicals | Alkyl beta-alkoxypropionates |
| US2886590A (en) * | 1957-08-28 | 1959-05-12 | Gulf Research Development Co | Diester lubricant |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3914182A (en) * | 1970-01-20 | 1975-10-21 | Burmah Oil Trading Ltd | Hydraulic fluids |
| US3970574A (en) * | 1975-06-16 | 1976-07-20 | E. I. Du Pont De Nemours & Co. | Hydraulic brake fluid composition |
| US4192760A (en) * | 1977-07-23 | 1980-03-11 | Akzona Incorporated | Cooling agent mixture containing ethylene glycol monoacetate, ethylene glycol diacetate, and glycol monomethyl ether for low-temperature freezing processes |
| EP0750033A1 (en) * | 1995-06-23 | 1996-12-27 | BP Chemicals Limited | Hydraulic fluid composition |
| FR2735784A1 (en) * | 1995-06-23 | 1996-12-27 | Bp Chemicals Snc | HYDRAULIC FLUID COMPOSITION COMPRISING A CORROSION INHIBITING SYSTEM |
| FR3083244A1 (en) * | 2018-07-02 | 2020-01-03 | Total Marketing Services | COMPOSITION FOR COOLING AND LUBRICATING A PROPULSION SYSTEM OF AN ELECTRIC OR HYBRID VEHICLE |
| WO2020007853A1 (en) * | 2018-07-02 | 2020-01-09 | Total Marketing Services | Composition for cooling and lubricating a propulsion system of an electric or hybrid vehicle |
| CN112437805A (en) * | 2018-07-02 | 2021-03-02 | 道达尔销售服务公司 | Composition for cooling and lubricating the propulsion system of an electric or hybrid vehicle |
| US11525099B2 (en) | 2018-07-02 | 2022-12-13 | Total Marketing Services | Composition for cooling and lubricating a propulsion system of an electric or hybrid vehicle |
| US11820958B2 (en) | 2018-11-05 | 2023-11-21 | Totalenergies Onetech | Use of a diester to improve the anti-wear properties of a lubricant composition |
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