US4414241A
Expired / Lapsed
US
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Method for lubricating bearing and gear surfaces
Assignee: Siemens AG
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Filing: 1982-01-29
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Granted: 1983-11-08
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Expires: 2002-01-29
Abstract
Abstract Long-term lubrication of highly loaded lubricating areas or surfaces, such as in very high speed medical and/or dental equipment, is obtained by applying a synthetic film, for example composed of poly(fluoroacrylic acid methyl ester) onto the sliding/moving surfaces, along with a polar oil having high lubricity. Anti-microbial agents can be added to the synthetic film. A pre-coat of molybdenum sulfide (MoS 2 ) can be provided for the synthetic film. Stationary surface abutting the sliding/moving surfaces, such as cages for ball-bearings, preferably composed of a phenol resin, can function as a reservoir for the anti-microbial agents and the oil.
Inventors
- 👤 Ferdinand Quella
- 👤 Eugen Hohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6637; F16C33/6688; F16C33/38; F16C33/44; F16C33/445; F16C33/664; F16C33/6648; F16C33/6696; F16N; F16N15/00; F16C2208/00; F16C2208/80; F16C2208/90; F16C2316/00; F16C2316/10; F16C2316/13
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
85 words
In a method of lubricating sliding/moving surfaces such as bearings, hand and angle pieces, high-speed turbine bearings and the like, the improvement comprising: applying a film of a poly (fluoroacrylic acid methyl ester) polymer out of a solution containing about 0.1 through 10% by weight of said polymer to the lubricating surface so as to attain a laye thickness of about 0.5 through 10 μm of said polymer on said lubricating surface; and thereafter lubricating the resultant surfaces with a polar oil exhibiting high lubricity.
Claim 2
Dependent Claim
85 words
In a method of lubricating sliding/moving surfaces such as bearings, hand and angle pieces, high-speed turbine bearings and the like, the improvement comprising: applying a film of a poly (fluoroacrylic acid methyl ester) polymer out of a solution containing about 0.1 through 10% by weight of said polymer to the lubricating surface so as to attain a laye thickness of about 0.5 through 10 μm of said polymer on said lubricating surface; and thereafter lubricating the resultant surfaces with a polar oil exhibiting high lubricity.
Claim 3
Dependent Claim
45 words
In a method as defined in claim 1 wherein said polar oil exhibits a viscosity of 10 through 150 mm 2 /s at 40° C. and is selected from the group consisting of natural fatty oils, long-chained monocarboxylic acids, long-chained dicarboxylic acids and mixtures thereof.
Claim 4
Dependent Claim
19 words
In a method as defined in claim 1 wherein said polar oil exhibits, at least partially, liquid crystal characteristics.
Claim 5
Dependent Claim
17 words
In a method as defined in claim 1 wherein an anti-microbial agent is added to said polymer.
Claim 6
Dependent Claim
28 words
In a method as defined in claim 4 wherein said anti-microbial agent is added in a concentration of about 0.1 through 5% by weight, relative to said polymer.
Claim 7
Dependent Claim
14 words
In a method as defined in claim 4 wherein said anti-microbial agent comprises N-(fluorodichloromethyl-thiophthalimide).
Claim 8
Dependent Claim
38 words
In a method as defined in claim 1 wherein said polymer is dissolved in a compatible readily volatile solvent in a weight amount of 0.1 through 10% to obtain a solution from which a polymer film is applied.
Claim 9
Dependent Claim
17 words
In a method as defined in claim 7 wherein an anti-microbial agent is added to said solution.
Claim 10
Dependent Claim
28 words
In a method as defined in claim 8 wherein said anti-microbial agent is added in a concentration of about 0.1 through 5% by weight, relative to said polymer.
Claim 11
Dependent Claim
49 words
In a method as defined in claim 1 wherein said polymer is dissolved in a compatible solvent to obtain a solution and said solution is filled into a pressurized spray can for simple after-treatment of the initially lubricated surfaces so as to obtain an improved lifetime of said surfaces.
Claim 12
Dependent Claim
55 words
In a method as defined in claim 1 wherein said polymer is dissolved in a compatible solvent, along with an anti-microbial agent, to obtain a solution, and the resultant solution is filled into a pressurized spray can for simple after-treatment of the initially lubricated surfaces so as to obtain an improved lifetime of said surfaces.
Claim 13
Dependent Claim
45 words
In a method as defined in claim 1 wherein, prior to application of said polymer film to said surfaces, a layer of molybdenum sulfide in a thickness of about 0.5 through 100 μm is applied to such surfaces as a pre-coating for said polymer film.
Claim 14
Dependent Claim
21 words
In a method as defined in claim 12 wherein said molybdenum sulfide layer is provided with an anti-microbial agent and oil.
Claim 15
Dependent Claim
18 words
In a method as defined in claim 12 wherein said molybdenum sulfide layer is applied by sputtering techniques.
Claim 16
Dependent Claim
20 words
In a method as defined in claim 12 wherein said molybdenum sulfide layer is applied by physical vapor deposition techniques.
Claim 17
Dependent Claim
60 words
In a method as defined in claim 1 wherein roller bearing cage surfaces in working relation with said sliding/moving surfaces are composed of a porous material selected from the group consisting of unfilled phenolic resins, phenolic resins filled with a heat-dissipating material, sintered materials, ceramics, aluminum, magnesium, and glass-ceramics, said roller cage surfaces functioning as a reservoir for said oil.
Claim 18
Dependent Claim
33 words
In a method as defined in claim 16 wherein an anti-microbial agent is added to said oil and said roller bearing cage surfaces function as a reservior for said oil and anti-microbial agent.
Claim 19
Dependent Claim
124 words
In a method of lubricating sliding/moving surfaces such as bearings, hand and angle pieces, high-speed turbine bearings and the like, the improvement comprising: applying a layer of molybdenum sulfide to said surfaces in a layer thickness of about 0.5 through 10 μm; applying a film of a poly (fluoroacrylic acid methyl ester polymer out of a solution containing about 0.1 through 10% by weight of said polymer to said molybdenum sulfide layer in a layer thickness of about 0.5 through 10 μm; and lubricating the resultant surface with a polar oil exhibiting a viscosity of about 10 through 150 mm 2 /s at 40° C. and selected from the group consisting of natural fatty oils, long-chained monocarboxylic acids, long-chained dicarboxylic acids and mixtures thereof.
Claim 20
Dependent Claim
124 words
In a method of lubricating sliding/moving surfaces such as bearings, hand and angle pieces, high-speed turbine bearings and the like, the improvement comprising: applying a layer of molybdenum sulfide to said surfaces in a layer thickness of about 0.5 through 10 μm; applying a film of a poly (fluoroacrylic acid methyl ester polymer out of a solution containing about 0.1 through 10% by weight of said polymer to said molybdenum sulfide layer in a layer thickness of about 0.5 through 10 μm; and lubricating the resultant surface with a polar oil exhibiting a viscosity of about 10 through 150 mm 2 /s at 40° C. and selected from the group consisting of natural fatty oils, long-chained monocarboxylic acids, long-chained dicarboxylic acids and mixtures thereof.
Claim 21
Dependent Claim
109 words
In a method of lubricating sliding/moving surfaces such as bearings, hand and angle pieces, high-speed turbine bearings and the like, the improvement comprising: dissolving a poly (fluoroacrylic acid methyl ester) polymer in a compatible, readily volatile solvent in a weight amount of about 0.1 through 10% to obtain a solution from which film of said polymer can be applied; applying a film of said polymer from said solution to said surfaces in a layer thickness of about 0.5 through 10 μm while evaporating said volatile solvent; and lubricating the resultant surface with a polar oil exhibiting a viscosity of about 10 through 150 mm 2 /s at 40° C.
Claim 22
Dependent Claim
109 words
In a method of lubricating sliding/moving surfaces such as bearings, hand and angle pieces, high-speed turbine bearings and the like, the improvement comprising: dissolving a poly (fluoroacrylic acid methyl ester) polymer in a compatible, readily volatile solvent in a weight amount of about 0.1 through 10% to obtain a solution from which film of said polymer can be applied; applying a film of said polymer from said solution to said surfaces in a layer thickness of about 0.5 through 10 μm while evaporating said volatile solvent; and lubricating the resultant surface with a polar oil exhibiting a viscosity of about 10 through 150 mm 2 /s at 40° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |