GB2249811A - High temperature sliding bearing - Google Patents
High temperature sliding bearing Download PDFInfo
- Publication number
- GB2249811A GB2249811A GB9123910A GB9123910A GB2249811A GB 2249811 A GB2249811 A GB 2249811A GB 9123910 A GB9123910 A GB 9123910A GB 9123910 A GB9123910 A GB 9123910A GB 2249811 A GB2249811 A GB 2249811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sliding bearing
- sintered
- sintered sliding
- bearing
- bearing according
- 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.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 8
- 239000000155 melt Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 5
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 3
- 235000019792 magnesium silicate Nutrition 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 229920005672 polyolefin resin Polymers 0.000 claims 2
- 239000007787 solid Substances 0.000 abstract description 15
- 239000000314 lubricant Substances 0.000 abstract description 12
- 239000002344 surface layer Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 18
- 238000002474 experimental method Methods 0.000 description 17
- 239000001993 wax Substances 0.000 description 11
- 230000000740 bleeding effect Effects 0.000 description 9
- 238000005461 lubrication Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010701 perfluoropolyalkylether Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910017755 Cu-Sn Inorganic materials 0.000 description 1
- 229910017927 Cu—Sn Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
- F16C2204/12—Alloys based on copper with tin as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Powder Metallurgy (AREA)
Abstract
A sintered sliding bearing comprises a porous sintered alloy in which the pores in at least the surface layer are filled with a thermoplastic resin with a melt viscosity at 250 DEG C of 10 to 2,000 cPs. The sintered alloy preferably contains a solid lubricant dispersed in the alloy matrix. The bearing is suitable for use at high temperatures, e.g. heating rollers in copying machines.
Description
i
TITLE OF THE INVENTION
SINTERED SLIDING BEARING BACKGROUND OF THE INVENTION
Field of the Invention -12493.111 This invention relates to a sintered sliding bearing, and in particular, to a sintered sliding bearing for use in a high temperature environment, such as a bearing for a heating roller in a copying machine.
Description of the Prior Art As sintered alloy sliding bearings for small size motors and household electric appliances, there have been heretofore widely used oil-impregnated sinteted bearings, i.e., sintered bearings in which the pores are impregnated with a lubricating oil.
The oil-impregnated sintered bearings have the disadvantage that, when used in a high temperature 0 environment of, for example, about 250 C, the impregnating oil bleeds out of the pores and then deteriorates or burns, which makes the bearings no longer usable.
A commonly taken measure to avoid the above disadvantage has been either the use of a sintered alloy not impregnated with oil but containing a solid lubricant such as graphite or molybdenum disulfide in the alloy matrix, or the use of a ball bearing in which a special lubricant durable at high temperatures is injected.
However, in the case of the sintered bearing relying upon solid lubrication, it is necessary, in order to attain sufficient lubricating effects, to add a large amount of the solid lubricant, which causes a decrease in the material strenqth. In addition, the solid lubrication bearing shows naturally a high coefficient of friction as 21 compared with fluid lubrication bearings. These disadvantages narrow the application of the bearing. The solid lubrication bearing further has the disadvantage that the production cost is higher than that of the oil-impregnated bearing.
The use of the ball bearing, on the other hand, has the disadvantage that it is considerably costly as compared with the common sintered sliding bearings.
SUMMARY OF THE INVENTION
An object of this invention is to provide a sintered sliding bearing which has excellent sliding characteristics in a high temperature environment and which is low-cost.
Another object of this invention is to provide a sintered sliding bearing suitable for use at high temperatures and having a long life.
A further object of this invention is to provide a sintered sliding bearing which shows low abrasion over the temperature range from normal temperatures to high temperatures.
These and other objects which will be apparent from the following detailed description can be achieved according to this invention by providing a sintered sliding bearing comprising a porous sintered alloy in which the pores in at least the surface layer of the sliding side are filled with a thermoplastic resin with a melt viscosity at 2500C of 10 to 2,000 centipoises (cps.).
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As the porous sintered metal, there may be employed Fe-Cu-C alloys, Fe alloys containing Co and/or a carbide-forming element, Cu-Sn alloys, Al alloys and the 35 like.
1 i i i i i 3 Incorporation of a solid lubricant into these sintered alloys can give more excellent sliding characteristics. A sintered metal comprising at least one from the group consisting of graphite, molybdenum disulfide, tungsten disulfide, lead, boron nitride and magnesium silicate, dispersed in the matrix of a Cu alloy or a Fe alloy is particularly preferred.
Content of the solid lubricant in the sintered alloy is preferably not higher than 20% by volume. A solid lubricant content exceeding 20%v. may cause the material strength to be too low.
Preferably, most of the pores of the sintered metal are impregnated with the thermoplastic resin. However, the bearing works well with impregnation of the pores in only the surface layer or even in only the inner surface layer, i.e., the surface layer of the sliding side, of the bearing.
The thermoplastic resin impregnating agent preferably 0 has, in addition to a melt viscosity at 250 C of 10 to 2rOOO CPS-r such properties that it deteriorates with difficulty when subjected to repeated heating/cooling, and is not corrosive. Thus, such a thermoplastic resin can be designated as a "synthetic wax".
Reasons why the above-mentioned melt viscosity range is preferred are as follows. If the melt viscosity at 250 0 C is lower than 10 cPs., the resin is liable to bleed out of the bearing during the use at high temperatures, which shortens the life of - the bearing. on the other hand, 0 if the melt viscosity at 250 C is higher than 2,000 cPs., it is difficult to impregnate the bearing with the resin because of its excessively high viscosity even when the resin is heated to as high a temperature as possible within range that causes no deterioration of the resin.
Examples of a thermoplastic resin which possesses the 35 above properties are low molecular weight polyolefins such a as polyethylene and polypropylene. A polyethylene with a molecular weight (MW) of 2,000 to 9,000 is particularly preferable. A polyethylene with a MW of less than 2,000 has a low heat stability, as seen from the fact, for example, that it suffers from depletion when heated. Further, its viscosity during the use at a high temperature is too low. A polyethylene with a MW of higher than 9,000, on the other hand, has too high a melt viscosity.
The sintered sliding bearing of this invention can be 10 produced, for example, by melting the thermoplastic resin having the above-mentioned melt viscosity and impregnating the pores of the sintered alloy with the melted resin.
The sintered sliding bearing of this invention, in which the pores are filled with the specific thermoplastic is resin instead of the oil employed in the oil-impregnated sintered bearing, shows a low coefficient of friction when it is used in a high temperature environment of, for' 0 example, 200 to 300 C, by the fluid lubricating action of the softened or liquefied resin with an appropriate 20 viscosity at the high temperature.
When the sintered alloy of the bearing of this invention further contains a solid lubricant such as graphite or molybdenum disulfide, the solid lubricant depresses abrasion during operation at normal temperatures, making up for insufficient fluid lubrication by the resin at normal temperatures. Further, at high temperatures, the solid lubricant serves to lower the coefficient of friction and abrasion conjointly with the fluid lubrication by the resin.
As explained above, the sintered sliding bearing-of this invention has excellent qualities, and further, it is low-cost as compared with ball bearings. Therefore, the sintered sliding bearing of this invention is suitable as bearing for copying machines, high temperature apparatus, conveying apparatus and the like in which the bearing is used at high temperatures, and thus it can enlarge the application field of the sintered bearing.
This invention will be further illustrated by the following examples. In the examples, the thermoplastic 5 resin impregnating agent is designated as "wax".
Example 1
In each experiment, a sintered body having a composition by weight of 9% of Sn, 3% of Co and the remainder Cu was subjected to sizing to form a bearing with an inner diameter of 1Omm, an outer diameter of 16mm and a length of 1Omm and a porosity of 20% by volume. The bearing was then impregnated with one of the following waxes or oils:
1.
2.
3.
4.
Polyethylene wax with a MW of 4,000 Polyethylene wax with a MW of 2,000 Polyethylene wax with a MW of 1,000 Perfluoropolyalkylether oligomer with a MW of 20 7500 (PFPE; fluoro-oil) 5. Perfluoropolyalkylether oligomer with a MW of 6300 (fluoro-oil) 6. Poly--.-olefin synthetic oil.
The bearings obtained in the experiments were held in 0 air at 250 C for 3 hours and then cooled, after which the bleeding of the wax or oil from the bearings was evaluated.
The results are shown in Table 1 together with the viscosities of the impregnating agents. In the table, the experiment number corresponds to the above impregnating agent number.
1 6 Table 1
Experiment viscosity (CP) of Results No. Impregnating Agent 0 0 at 40 C at 250 C 1 - 57 no bleeding observed 2 10 no bleeding observed 3 - 2 bleeding observed 4 741 6 bleeding observed 124 6 bleeding observed 6 100 - oil became sludge 1 The bearings in the experiments No. 4 and 5 which employed the conventional synthetic oils (fluoro-oils), showed considerable bleeding of the impregnating oils. This results from the fact that the oils have low viscosities, though they have relatively high molecular weights.
The bearing of the experiment No. 6 which employed a common lubricating oil, is completely unacceptable, since the oil became a sludge.
As to the bearings of the experiments No. 1 to 3, it can be understood from the results in the table that, when 0 the polyethylene wax employed has a viscosity at 250 C of cPs. or more, no bleeding of the impregnating wax occurs.
Example 2
In each experiment, a powdered mxture with a composition by weight of 9% of Sn, 3% of Co and the remainder Cu was mixed with 5% of powdered graphite, and i 7 the resulting mixture was subjected to compacting, sintering, and sizing to form a bearing similar to that of Example 1. The obtained bearing was impregnated with one of the aforementioned waxes or oils.
Each of the obtained bearings was tested for coefficient of friction by contacting it with a shaft made of a carbon steel (S4SC) and rotating in an environment of 0 C.
Test conditions were as follows:
sliding velocity: 9 m/minute; bearing pressure: 20 Kgf/cm 2; operating time: 500 hours.
Test results are shown in Table 2. In the table, the experiment number corresponds to the above impregnating agent number.
is Table 2
Experiment No. Coefficient of Friction 1 0.03 2 0.05 3 0.20 4 0.15 0.17 6 0.35 The bearings in the experiments No. 1 and 2 according to this invention each showed a low coefficient of friction, while the bearing in the experiment No. 3, which employed the low viscosity wax not according to this invention, and the bearings in the experiments No. 4 and 5 which employed the conventional synthetic oils each showed a high coefficient of friction.
0 The cause of the high values in the experiments No. 3 to 5 is considered to be loss of the impregnating oil due to bleeding out of the bearing.
The bearing in the experiment No. 6 which employed a common lubricating oil, showed a very high coefficient of friction. The cause thereof is considered to be that the lubricating action by the oil had been practically lost and hence the sliding was effected only by the solid lubrication by graphite.
1 When the experiments were carried out employing a sintered Fe alloy containing 1.5% by weight of Cu as the bearing material, the results showed a tendency similar to the above.
Further, when the experiments were carried out varying the solid lubricant added to the bearing material, graphite gave the lowest coefficient of friction, although.there was no great difference in coefficient of friction among the various solid lubricants used. The value of coefficient of friction increased in the following order: (low) graphite < molybdenum disulfide < tungsten disulfide < boron nitride < magnesium silicate < lead (high).
i 1
Claims (10)
- WHAT IS CLAIMED IS:9 1. A sintered sliding bearing comprising a porous sintered alloy in which the pores in at least the surface 5 layer of the sliding side are filled with a thermoplastic 0 resin with a melt viscosity at 250 C of 10 to 2,000 centipoises.
- 2. The sintered sliding bearing according to claim 1, wherein the thermoplastic resin is a low molecular weight polyolefin resin.
- 3. The sintered sliding bearing according to claim 2, wherein the low molecular weight polyolefin resin is a polyethylene with a molecular weight of 2,000 to 9,000.
- 4. The sintered sliding bearing according to any-one ofclaims 1 to 3, wherein the sintered alloy comprises at least one selected from the group consisting of graphite, molybdenum disulfide, tungsten disulfide, lead, boron nitride and magnesium silicate, dispersed in the matrix of an alloy selected from the group consisting of Cu alloys and Fe alloys.
- 5. The sintered sliding bearing according to claim 1, for use at high temperatures.
- 6. The sintered sliding bearing according to claim 5, for use as a bearing in an apparatus in which the bearing is used in a high temperature environment.
- 7. The sintered sliding bearing according to claim 6 wherein the apparatus is one selected from the group consisting of copying machines, high temperature apparatus and conveying apparatus.
- 8. The sintered sliding bearing according to claim 6P for use as a bearing for the heating roller of a copying machine.
- 9. A sintered sliding bearing substantially as hereinbefore described with reference to the foregoing examples.
- 10. Any novel feature or combination of feature described herein.i
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310879A JP2907999B2 (en) | 1990-11-16 | 1990-11-16 | High temperature sintered plain bearings |
| SG160694A SG160694G (en) | 1990-11-16 | 1994-11-05 | Sintered sliding bearing |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9123910D0 GB9123910D0 (en) | 1992-01-02 |
| GB2249811A true GB2249811A (en) | 1992-05-20 |
| GB2249811B GB2249811B (en) | 1994-08-24 |
Family
ID=26566496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9123910A Expired - Fee Related GB2249811B (en) | 1990-11-16 | 1991-11-11 | Sintered sliding bearing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2907999B2 (en) |
| DE (1) | DE4137723C2 (en) |
| FR (1) | FR2669386B1 (en) |
| GB (1) | GB2249811B (en) |
| SG (1) | SG160694G (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2273139A (en) * | 1992-11-12 | 1994-06-08 | Ford Motor Co | Valve train for an internal combustion engine using solid lubricant |
| US5934236A (en) * | 1992-11-12 | 1999-08-10 | Ford Global Technologies, Inc. | Low friction valve train |
| US6167856B1 (en) | 1992-11-12 | 2001-01-02 | Ford Global Technologies, Inc. | Low friction cam shaft |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4215285B2 (en) * | 1995-08-08 | 2009-01-28 | 株式会社小松製作所 | Self-lubricating sintered sliding material and manufacturing method thereof |
| JP4743565B2 (en) * | 1999-11-01 | 2011-08-10 | 株式会社ダイヤメット | Graphite-dispersed Cu-based sintered alloy bearing for motor-type fuel pump that exhibits excellent wear resistance under high-pressure and high-speed circulation of gasoline, and motor-type fuel pump using the same |
| JP4743568B2 (en) * | 2001-03-28 | 2011-08-10 | 株式会社ダイヤメット | Cu-based sintered alloy bearing for motor-type fuel pump and motor-type fuel pump incorporating the bearing |
| JP4743569B2 (en) * | 2001-03-28 | 2011-08-10 | 株式会社ダイヤメット | Cu-based sintered alloy bearing for motor-type fuel pump and motor-type fuel pump incorporating the bearing |
| AT502630B1 (en) * | 2005-10-21 | 2008-01-15 | Miba Sinter Austria Gmbh | COMPONENT, PARTICULARLY FORM PART, WITH A COATING |
| JP5684977B2 (en) | 2009-08-31 | 2015-03-18 | 株式会社ダイヤメット | Cu-based sintered sliding member |
| CN113560578A (en) * | 2021-08-11 | 2021-10-29 | 苏州中耀科技有限公司 | Forming method of temporary metal mold |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60235767A (en) * | 1984-05-09 | 1985-11-22 | イビデン株式会社 | Sliding member and manufacture |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3218255A (en) * | 1960-01-08 | 1965-11-16 | Glacier Co Ltd | Bearing composition containing polytetrafluoroethylene and ammonium manganese orthophosphate |
| US3067262A (en) * | 1961-05-10 | 1962-12-04 | Du Pont | Telomers of tetrafluoroethylene |
| GB1034094A (en) * | 1962-04-13 | 1966-06-29 | Polymer Corp | Self-lubricating article and means for its manufacture |
| DE1594392C3 (en) * | 1965-02-23 | 1979-03-01 | Daikin Kogyo K.K., Osaka (Japan) | Process for the production of solid lubricants |
| US3519609A (en) * | 1967-06-07 | 1970-07-07 | Eastman Kodak Co | Method for making polyolefin waxes by thermal degradation of higher molecular weight polyolefins in the presence of organic acids and anhydrides |
| DE1961833B2 (en) * | 1969-12-10 | 1976-08-12 | Glyco-Metall-Werke Daelen & Loos Gmbh, 6200 Wiesbaden-Schierstein | SLIDING BEARING LAYER AND METHOD FOR MANUFACTURING IT |
| JPS5154812A (en) * | 1974-11-09 | 1976-05-14 | Taiho Kogyo Co Ltd | JIKUKEZ AIRYO |
| DE2703325C2 (en) * | 1977-01-27 | 1983-01-13 | Karl Schmidt Gmbh, 7107 Neckarsulm | Plain bearing material |
| EP0003856B1 (en) * | 1978-02-25 | 1981-03-11 | Karl Schmidt Gmbh | Starting material for a slide bearing |
| DE2960602D1 (en) * | 1978-02-25 | 1981-11-12 | Schmidt Gmbh Karl | Slide bearing material |
| JPS5658903A (en) * | 1979-10-15 | 1981-05-22 | Kanto Yakin Kogyo Kk | Iron sintering material infiltered with thermoplastic resin |
| DE3027409A1 (en) * | 1980-07-19 | 1982-02-25 | Karl Schmidt Gmbh, 7107 Neckarsulm | COMPOSITE SLIDE BEARING MATERIAL |
| DE3425969A1 (en) * | 1984-07-14 | 1986-01-16 | Kolbenschmidt AG, 7107 Neckarsulm | COMPOSITE BEARING MATERIAL |
| JPS62112707A (en) * | 1985-11-11 | 1987-05-23 | Komatsu Ltd | Composite sliding material |
-
1990
- 1990-11-16 JP JP2310879A patent/JP2907999B2/en not_active Expired - Fee Related
-
1991
- 1991-11-11 GB GB9123910A patent/GB2249811B/en not_active Expired - Fee Related
- 1991-11-15 FR FR9114122A patent/FR2669386B1/en not_active Expired - Fee Related
- 1991-11-15 DE DE4137723A patent/DE4137723C2/en not_active Expired - Fee Related
-
1994
- 1994-11-05 SG SG160694A patent/SG160694G/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60235767A (en) * | 1984-05-09 | 1985-11-22 | イビデン株式会社 | Sliding member and manufacture |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2273139A (en) * | 1992-11-12 | 1994-06-08 | Ford Motor Co | Valve train for an internal combustion engine using solid lubricant |
| GB2273139B (en) * | 1992-11-12 | 1996-05-15 | Ford Motor Co | Low friction valve train for an internal combustion engine |
| US5934236A (en) * | 1992-11-12 | 1999-08-10 | Ford Global Technologies, Inc. | Low friction valve train |
| US6167856B1 (en) | 1992-11-12 | 2001-01-02 | Ford Global Technologies, Inc. | Low friction cam shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2907999B2 (en) | 1999-06-21 |
| SG160694G (en) | 1995-03-17 |
| DE4137723A1 (en) | 1992-05-21 |
| JPH04183805A (en) | 1992-06-30 |
| DE4137723C2 (en) | 1997-06-05 |
| FR2669386B1 (en) | 1996-03-08 |
| FR2669386A1 (en) | 1992-05-22 |
| GB9123910D0 (en) | 1992-01-02 |
| GB2249811B (en) | 1994-08-24 |
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| 746 | Register noted 'licences of right' (sect. 46/1977) |
Effective date: 19941013 |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20091111 |