US2620296A - Method of electrolytically coating and etching bearing surfaces - Google Patents
Method of electrolytically coating and etching bearing surfaces Download PDFInfo
- Publication number
- US2620296A US2620296A US760762A US76076247A US2620296A US 2620296 A US2620296 A US 2620296A US 760762 A US760762 A US 760762A US 76076247 A US76076247 A US 76076247A US 2620296 A US2620296 A US 2620296A
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- United States
- Prior art keywords
- etching solution
- electrolytically
- mask
- bearing surface
- deposited
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- Expired - Lifetime
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Classifications
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- 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
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/10—Bearings
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/14—Etching locally
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- 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
- F16C33/14—Special methods of manufacture; Running-in
-
- 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
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/30—Coating surfaces
- F16C2223/70—Coating surfaces by electroplating or electrolytic coating, e.g. anodising, galvanising
Definitions
- This invention relates to chromium surface layers on cylinder bores, shafts and the like, and is more particularly concerned with the treatment and finishing of said surfaces after the metal has been electrolytically deposited thereon and the surface has been ground or honed.
- the object of the invention is to provide new or improved means for treatment of the aforesaid surfaces, whereby pits, depressions or grooves are formed in any desired or defined positions therein, which are adapted to retain oil and thus ensure eflicient lubrication between the moving parts, and at the same time leaving a considerable part of the surface unaffected and at its original hardness, to provide maximum resistance to wear.
- a layer of chromium is electrolytically deposited on thebore of a cylinder liner or the like which, if necessary, is subsequently ground or honed to the required finished size or dimension.
- a sleeve or casing of plastic or other suitable material is arranged to cover or surround the surface of the article to be treated, and the said article with the perforated sleeve attached thereto, which is arranged to constitute the anode, is immersed in an electrolytic bath containing a solution of caustic soda, chlorides, chromic acid, or any suitable chromium plating solution.
- a cathode comprising a bar of steel or other suitable material, which is so disposed in said bath that the electric current flows thereto from the article constituting the anode through the holes or slots in the aforesaid casing, and the chromium or like surface adjacent to the perforations in the casing is partly or completely removed, thus forming correspondingly disposed recesses or grooves which are adapted to form pockets for retaining oil under all working conditions.
- Figures 1 and 2 show respectively a front and a side elevation of a cylinder liner mounted in a frame or holder ready for immersion in an electrolytic bath containing a solution of caustic soda, chlorides, chromic acid, or any suitable chromium plating solution, for treatment in accordance with this invention.
- Figure 3 shows a transverse sectional view taken on line A-A, Figure 1.
- Figure 4 shows in sectional elevation part of a cylinder liner after treatment in accordance with this invention.
- Figure 5 shows a side elevation of the perforated plastic sleeve adapted to be placed in the cylinder liner.
- I provide a sleeve I, of plastic or other suitable material, in which are formed holes or perforations 2 of any desired shape and disposition.
- the said holes 2 are shown disposed in vertical and horizontal alignment, but if desired said holes may be disposed in any other formation, such as curved or spiral.
- the aforesaid perforated sleeve I may be conveniently made from a sheet or strip of plastic material in which are formed the desired perforations, the said perforated sheet being rolled into a cylindrical form and its abutting edges fixed together by a plastic glue, or by other suitable means.
- a perforated sleeve such as before described is fixed within a cylinder liner 3 that has been previously chromium plated and ground or honed to the required finished dimension.
- the external diameter of said perforated sleeve is preferably such that provides a frictional fit within the cylinder liner, thereby providing the means whereby it is held in position.
- the cylinder liner 3 is mounted in a two part clamp 4 secured together by clamping bolts 5.
- On one part of the said clamp 4 are welded vertically disposed rods 6 to which are fixed top and bottom plates 7 and 8 and an intermediate plate 9.
- On the bottom plate 8 is mounted an insulating pad l provided on its upper side with a stem part I I, said pad being arranged to provide a support for a steel bar l2 which comprises the cathode, the upper end of said bar being supported in a rubber 01' like insulating bush [3 mounted in a central hole in the intermediate plate 9.
- To the aforesaid bar [2 constituting the cathode is attached a cable M.
- a clip l which provides a support for the cylinder liner as the anode within an electrolytic bath, containing a solution of caustic soda, chlorides, chromic acid or the like.
- the electric current flowing from the aforesaid anode constituted by the cylinder liner to the cathode passes through the holes in the perforated sleeve I, and partly or completely removes adjacent thereto the chromium or like plated surface on the said cylinder liner 3, as shown in Figure 4, thus forming correspondingly disposed recesses l6 which are adapted to form pockets for retaining oil under all working conditions.
- the shape or configuration and disposition of the holes in the plastic sleeve 1 may be modified as desired, for example, instead of round holes they may comprise elongated slots, and said holes or slots may be disposed in curved or spiral formation.
- the perforated casing may conveniently comprise a sheet of perforated steel or plastic material, shaped and bent to surround the chromium plated surface of the article to be treated, in the manner previously described, whereby holes or pockets are formed in said surface.
- a process of treating a machine part to provide an electrolytically-deposited bearing surface thereon which comprises electrolytically depositing a metallic layer on such a part to a depth to provide a bearing surface of substantially a desired final bearing size, covering the electrolytically-deposited bearing surface by a mask having perforations distributed over its area and which is resistant to attack by an electrolytic etching solution, immersing in a bath of an electrolytic etching solution the part having the metallic layer electrolytically deposited thereon and the perforated mask covering such layer, and passing an electric current from an external source through the bath of electrolytic etching solution in such direction that said part constitutes the anode until the portions of the electrolytically-deposited metallic layer exposed through the perforations in the mask to the etching solution are etched to a depth sufficient to form shallow lubricant retaining recesses while the portions of said layer covered by the portions of the mask intervening the perforations therein are not exposed to the etching solution and remain unetched and smooth,
- a process of treating machine parts which comprises immersing a machine part in an electrolytic bath, passing an electric current derived from an external source of supply through the electrolytic bath in such manner that the part constitutes the cathode until the part has been provided with an electro-deposited metallic bearing surface which is hard and wear-resisting and has thereby substantially attained its final plated size, removing said plated part from the electrolytic bath, covering the electro-deposited metallic bearing surface with a perforated mask which is resistant to attack by an electrolytic etching solution for said bearing surface, immersing the plated part so covered in an electrolytic etching solution for said bearing surface, passing an electric current derived from an external source of supply through said electrolytic etching solution in such manner that the portions of the electro-deposited metallic bearing surface exposed to the etching solution through the perforations in the mask constitute a plurality of spaced, interconnected anodes until shallow spaced recesses of sufiicient area and depth to retain lubricant are formed in the metallic bearing surf-ace by partial removal of those
- a process of treating machine parts which comprises immersing a machine part in an electrolytic bath, passing an electric current derived from an external source of supply through the electrolytic bath in such manner that the part constitutes the cathode until the part has been provided with an electro-deposited metallic bearing surface which is hard and wear-resisting and has thereby substantially attained its final plated size, removing said plated part from the electrolytic bath, covering the electro-deposited metallic bearing surface with a perforated mask which is resistant to attack by an electrolytic etching solution for said bearing surface, immersing the plated part so covered in electrolytic etching solution for said bearing surface, passing an electric current derived from an external source of supply through said electrolytic etching solution in such manner that the portions of the electro-deposited metallic bearing surface exposed to the etching solution through the perforations in the mask constitute a plurality of spaced inter-connected anodes until shallow, spaced, recessed areas are formed in the metallic bearing surface by partial removal of those portions of said bearing surface exposed to said electrolytic etching solution through said
Description
Dec. 2, 1952 I s. c. WILSDON I 2,620,296
METHOD OF ELECTROLYTICALLY COATING AND ETCHING BEARING SURFACES Filed July 14, 1947 l I I I I I I I 3' I I- I I I 3 I I I l I I I I I I l I I I I I I I f I I I I F I I III I I III I I: I I II. I I-4' A II I I I I *II I I I I I I II I II II I I I I I I I I I I I I I I l I I 1 I I I I I '1 I III I I I I-*- II I I ''I I I I I' I I I I l I I I 5 I I I 4 I I I I I I I I 3 I I I I I I I 3'I I I I I I I I I I l I I I I l G I I I I 6 I I L I I I Ingmar mQCQM;
Attorney.
Patented Dec. 2, 1952 METHOD OF ELECTROLYTICALLY COATING AND ETCHING BEARING SURFACES Sydney Charles Wilsdon, Olton, England, assignor to Monochrome Limited, Redditch, England, a
British company Application July 14, 1947, Serial No. 760,762 In Great Britain February 22, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires February 22, 1963 3 Claims.
This invention relates to chromium surface layers on cylinder bores, shafts and the like, and is more particularly concerned with the treatment and finishing of said surfaces after the metal has been electrolytically deposited thereon and the surface has been ground or honed.
It is well known that surfaces so treated are very hard and smooth thus greatly reducing the rate of wear when applied say to the cylinder bores or cylinder liners of engines, but owing to the smoothness of said surface, it does not hold or retain oil, and it is therefore diificult to ensure and maintain the required amount of lubricant over the surface of the cylinder bore or liner to avoid the objectionable results arising from insufiicient lubrication.
It has been previously proposed to provide a process wherein a layer of chromium is deposited electrolytically on the surface of a cylinder bore, and the chromium layer then treated for a short time with a reversedcurrent so that the bore becomes the anode, with the result that a certain amount of the chromium is removed from the surface and numeroussmall grooves, pits or depressions are formed in the surface, such being adapted to retain oil under working conditions. i
The object of the invention is to provide new or improved means for treatment of the aforesaid surfaces, whereby pits, depressions or grooves are formed in any desired or defined positions therein, which are adapted to retain oil and thus ensure eflicient lubrication between the moving parts, and at the same time leaving a considerable part of the surface unaffected and at its original hardness, to provide maximum resistance to wear.
According to this invention a layer of chromium is electrolytically deposited on thebore of a cylinder liner or the like which, if necessary, is subsequently ground or honed to the required finished size or dimension. A sleeve or casing of plastic or other suitable material is arranged to cover or surround the surface of the article to be treated, and the said article with the perforated sleeve attached thereto, which is arranged to constitute the anode, is immersed in an electrolytic bath containing a solution of caustic soda, chlorides, chromic acid, or any suitable chromium plating solution. Also immersed in the electrolytic bath is a cathode, comprising a bar of steel or other suitable material, which is so disposed in said bath that the electric current flows thereto from the article constituting the anode through the holes or slots in the aforesaid casing, and the chromium or like surface adjacent to the perforations in the casing is partly or completely removed, thus forming correspondingly disposed recesses or grooves which are adapted to form pockets for retaining oil under all working conditions.
One practical method of carrying the invention into effect will now be described with reference to the accompanying drawings, in which Figures 1 and 2 show respectively a front and a side elevation of a cylinder liner mounted in a frame or holder ready for immersion in an electrolytic bath containing a solution of caustic soda, chlorides, chromic acid, or any suitable chromium plating solution, for treatment in accordance with this invention.
Figure 3 shows a transverse sectional view taken on line A-A, Figure 1.
Figure 4 shows in sectional elevation part of a cylinder liner after treatment in accordance with this invention.
Figure 5 shows a side elevation of the perforated plastic sleeve adapted to be placed in the cylinder liner.
In one convenient arrangement for the treatment according to this invention of a cylinder liner that has been previously chromium plated and subsequently ground or honed to the required internal dimension or size, I provide a sleeve I, of plastic or other suitable material, in which are formed holes or perforations 2 of any desired shape and disposition. In the example shown in Figure 5 the said holes 2 are shown disposed in vertical and horizontal alignment, but if desired said holes may be disposed in any other formation, such as curved or spiral.
The aforesaid perforated sleeve I may be conveniently made from a sheet or strip of plastic material in which are formed the desired perforations, the said perforated sheet being rolled into a cylindrical form and its abutting edges fixed together by a plastic glue, or by other suitable means. i i
A perforated sleeve such as before described is fixed within a cylinder liner 3 that has been previously chromium plated and ground or honed to the required finished dimension. The external diameter of said perforated sleeve is preferably such that provides a frictional fit within the cylinder liner, thereby providing the means whereby it is held in position.
The cylinder liner 3 is mounted in a two part clamp 4 secured together by clamping bolts 5. On one part of the said clamp 4 are welded vertically disposed rods 6 to which are fixed top and bottom plates 7 and 8 and an intermediate plate 9. On the bottom plate 8 is mounted an insulating pad l provided on its upper side with a stem part I I, said pad being arranged to provide a support for a steel bar l2 which comprises the cathode, the upper end of said bar being supported in a rubber 01' like insulating bush [3 mounted in a central hole in the intermediate plate 9. To the aforesaid bar [2 constituting the cathode is attached a cable M.
To the top plate 1 is fixed a clip l which provides a support for the cylinder liner as the anode within an electrolytic bath, containing a solution of caustic soda, chlorides, chromic acid or the like.
The electric current flowing from the aforesaid anode constituted by the cylinder liner to the cathode passes through the holes in the perforated sleeve I, and partly or completely removes adjacent thereto the chromium or like plated surface on the said cylinder liner 3, as shown in Figure 4, thus forming correspondingly disposed recesses l6 which are adapted to form pockets for retaining oil under all working conditions.
The shape or configuration and disposition of the holes in the plastic sleeve 1 may be modified as desired, for example, instead of round holes they may comprise elongated slots, and said holes or slots may be disposed in curved or spiral formation.
For treatment of the plated surface of a shaft or the like, the perforated casing may conveniently comprise a sheet of perforated steel or plastic material, shaped and bent to surround the chromium plated surface of the article to be treated, in the manner previously described, whereby holes or pockets are formed in said surface.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:
1. A process of treating a machine part to provide an electrolytically-deposited bearing surface thereon, which comprises electrolytically depositing a metallic layer on such a part to a depth to provide a bearing surface of substantially a desired final bearing size, covering the electrolytically-deposited bearing surface by a mask having perforations distributed over its area and which is resistant to attack by an electrolytic etching solution, immersing in a bath of an electrolytic etching solution the part having the metallic layer electrolytically deposited thereon and the perforated mask covering such layer, and passing an electric current from an external source through the bath of electrolytic etching solution in such direction that said part constitutes the anode until the portions of the electrolytically-deposited metallic layer exposed through the perforations in the mask to the etching solution are etched to a depth sufficient to form shallow lubricant retaining recesses while the portions of said layer covered by the portions of the mask intervening the perforations therein are not exposed to the etching solution and remain unetched and smooth,
2. A process of treating machine parts which comprises immersing a machine part in an electrolytic bath, passing an electric current derived from an external source of supply through the electrolytic bath in such manner that the part constitutes the cathode until the part has been provided with an electro-deposited metallic bearing surface which is hard and wear-resisting and has thereby substantially attained its final plated size, removing said plated part from the electrolytic bath, covering the electro-deposited metallic bearing surface with a perforated mask which is resistant to attack by an electrolytic etching solution for said bearing surface, immersing the plated part so covered in an electrolytic etching solution for said bearing surface, passing an electric current derived from an external source of supply through said electrolytic etching solution in such manner that the portions of the electro-deposited metallic bearing surface exposed to the etching solution through the perforations in the mask constitute a plurality of spaced, interconnected anodes until shallow spaced recesses of sufiicient area and depth to retain lubricant are formed in the metallic bearing surf-ace by partial removal of those positions of said bearing surface exposed to said electrolytic etching solution through said perforations, the portions of said bearing surface covered by the mask and not exposed to said electrolytic etching solution remaining smooth and unetched, and thereafter removing the treated part from the electrolytic etching solution and the perforated mask from the treated part.
3. A process of treating machine parts which comprises immersing a machine part in an electrolytic bath, passing an electric current derived from an external source of supply through the electrolytic bath in such manner that the part constitutes the cathode until the part has been provided with an electro-deposited metallic bearing surface which is hard and wear-resisting and has thereby substantially attained its final plated size, removing said plated part from the electrolytic bath, covering the electro-deposited metallic bearing surface with a perforated mask which is resistant to attack by an electrolytic etching solution for said bearing surface, immersing the plated part so covered in electrolytic etching solution for said bearing surface, passing an electric current derived from an external source of supply through said electrolytic etching solution in such manner that the portions of the electro-deposited metallic bearing surface exposed to the etching solution through the perforations in the mask constitute a plurality of spaced inter-connected anodes until shallow, spaced, recessed areas are formed in the metallic bearing surface by partial removal of those portions of said bearing surface exposed to said electrolytic etching solution through said perforations, the portions of said bearing surface covered by the mask and not exposed to said electrolytic etching solution remaining smooth and unetched and having a surface area in excess of the total surface area of those portions of said bearing surface exposed to said electrolytic etching solution, and thereafter removing the treated part from the electrolytic etching solution and the perforated mask from the treated part.
SYDNEY CHARLES WILSDON.
(References on following page) 2,620,296 5 6 REFERENCES CITED FOREIGN PATENTS The following references are of record in the Number Country Date me i PATENTS 563,435 Germany Nov. 5, 1 932 Number Name BM 5 OTHER REFERENCES 422 677 Dam July 1181922 Amateur Craftsmans Cyclopedia," by Gros- Booe Set and Dunlap page 2,187,626 Merriman Jan. 16, 1940 2,314,604 Van der Hurst; Mar. 23, 1943 10 2,343,569 Neely et a1 Mar. 7, 1944 2,433,457 Jarrett et a1 Dec. 30, 1947
Claims (1)
1. A PROCESS OF TREATING A MACHINE PART TO PROVIDE AN ELECTROLYTICALLY-DEPOSITED BEARING SURFACE THEREON, WHICH COMPRISES ELECTROLYTICALLY DEPOSITING A METALLIC LAYER ON SUCH A PART TO A DEPTH TO PROVIDE A BEARING SURFACE OF SUBSTANTIALLY A DESIRED FINAL BEARING SIZE, COVERING THE ELECTROLYTICALLY-DEPOSITED BEARING SURFACE BY A MASK HAVING PERFORATIONS DISTRIBUTED OVER ITS AREA AND WHICH IS RESISTANT TO ATTACK BY AN ELECTROLYTIC ETCHING SOLUTION, IMMERSING IN A BATH OF AN ELECTROLYTIC ETCHING SOLUTION THE PART HAVING THE METALLIC LAYER ELECTROLYTICALLY DEPOSITED THEREON AND THE PERFORATED MASK COVERING SUCH LAYER, AND PASSING AN ELECTRIC CURRENT FROM AN EXTERNAL SOURCE THROUGH THE BATH OF ELECTROLYTIC ETCHING SOLUTION IN SUCH DIRECTION THAT SAID PART CONSTITUTES THE ANODE UNTIL THE PORTIONS OF THE ELECTROLYTICALLY-DEPOSITED METALLIC LAYER EXPOSED THROUGH THE PERFORATIONS IN THE MASK TO THE ETCHING SOLUTION ARE ETCHED TO A DEPTH SUFFICIENT TO FORM SHALLOW LUBRICANT RETAINING RECESSES WHILE THE PORTIONS OF SAID LAYER COVERED BY THE PORTIONS OF THE MASK INTERVENING THE PERFORATIONS THEREIN ARE NOT EXPOSED TO THE ETCHING SOLUTION AND REMAIN UNETCHED AND SMOOTH.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB267121X | 1943-02-22 | ||
GB190244X | 1944-02-19 |
Publications (1)
Publication Number | Publication Date |
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US2620296A true US2620296A (en) | 1952-12-02 |
Family
ID=26253753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US760762A Expired - Lifetime US2620296A (en) | 1943-02-22 | 1947-07-14 | Method of electrolytically coating and etching bearing surfaces |
Country Status (5)
Country | Link |
---|---|
US (1) | US2620296A (en) |
CH (1) | CH267121A (en) |
FR (1) | FR950941A (en) |
GB (1) | GB561788A (en) |
NL (1) | NL66417C (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2760929A (en) * | 1952-10-06 | 1956-08-28 | Republic Steel Corp | Electroplating apparatus |
US2848401A (en) * | 1953-05-07 | 1958-08-19 | Olin Mathieson | Method of electrolytically rifling gun barrels |
US3063763A (en) * | 1958-12-02 | 1962-11-13 | Chromium Corp Of America | Chromium bearing surface |
US3127331A (en) * | 1959-06-15 | 1964-03-31 | Reverse current electrolytic process | |
US3291667A (en) * | 1961-04-10 | 1966-12-13 | North American Aviation Inc | Etching process for selectively forming workpiece surfaces |
US3438789A (en) * | 1964-02-27 | 1969-04-15 | Schmidt Gmbh Karl | Lubricant coating for friction surfaces and process for producing same |
US3441328A (en) * | 1966-10-20 | 1969-04-29 | Forbes M Hurley | Prelubricated bearing surface,and method of preparing the same |
US4045312A (en) * | 1974-11-30 | 1977-08-30 | Dai Nippon Printing Co., Ltd. | Method for the electrolytic etching of metal workpiece |
US4082632A (en) * | 1975-08-26 | 1978-04-04 | The International Nickel Company, Inc. | Production of perforated metal foil |
US4119514A (en) * | 1977-04-21 | 1978-10-10 | The International Nickel Company, Inc. | Production of perforated metal foil |
US4706417A (en) * | 1984-09-06 | 1987-11-17 | Chromium Corporation | Finish for cylinder liners |
US4849302A (en) * | 1985-05-24 | 1989-07-18 | Licentia Patent-Verwaltungs-Gmbh | Electrolytically metallized article and processes therefore |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2529915A1 (en) * | 1982-07-09 | 1984-01-13 | Sofrelmo | Improvement to the process for electrolytic deposition of hard metal in the bore of a metal component and device for its use |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1422677A (en) * | 1918-01-09 | 1922-07-11 | Dann Products Company | Method of manufacturing composite articles for bearings or other purposes |
DE563435C (en) * | 1930-12-20 | 1932-11-05 | Wmf Wuerttemberg Metallwaren | A shielding cell made of insulating material for objects to be silvered locally to different degrees |
US2052962A (en) * | 1934-12-31 | 1936-09-01 | Mallory & Co Inc P R | Process of etching |
US2187626A (en) * | 1938-07-02 | 1940-01-16 | Merriman Brothers Inc | Self-lubricating bearing |
US2314604A (en) * | 1938-09-03 | 1943-03-23 | Horst Corp Of America V D | Method of producing chromium wearing surfaces |
US2343569A (en) * | 1941-11-03 | 1944-03-07 | Standard Oil Co California | Pretreated bearing surface and method of producing the same |
US2433457A (en) * | 1944-04-29 | 1947-12-30 | Koppers Co Inc | Chrome plated wear resisting surface |
-
0
- NL NL66417D patent/NL66417C/xx active
-
1943
- 1943-02-22 GB GB2876/43A patent/GB561788A/en not_active Expired
-
1947
- 1947-07-14 US US760762A patent/US2620296A/en not_active Expired - Lifetime
- 1947-08-04 FR FR950941D patent/FR950941A/en not_active Expired
- 1947-12-06 CH CH267121D patent/CH267121A/en unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1422677A (en) * | 1918-01-09 | 1922-07-11 | Dann Products Company | Method of manufacturing composite articles for bearings or other purposes |
DE563435C (en) * | 1930-12-20 | 1932-11-05 | Wmf Wuerttemberg Metallwaren | A shielding cell made of insulating material for objects to be silvered locally to different degrees |
US2052962A (en) * | 1934-12-31 | 1936-09-01 | Mallory & Co Inc P R | Process of etching |
US2187626A (en) * | 1938-07-02 | 1940-01-16 | Merriman Brothers Inc | Self-lubricating bearing |
US2314604A (en) * | 1938-09-03 | 1943-03-23 | Horst Corp Of America V D | Method of producing chromium wearing surfaces |
US2343569A (en) * | 1941-11-03 | 1944-03-07 | Standard Oil Co California | Pretreated bearing surface and method of producing the same |
US2433457A (en) * | 1944-04-29 | 1947-12-30 | Koppers Co Inc | Chrome plated wear resisting surface |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2760929A (en) * | 1952-10-06 | 1956-08-28 | Republic Steel Corp | Electroplating apparatus |
US2848401A (en) * | 1953-05-07 | 1958-08-19 | Olin Mathieson | Method of electrolytically rifling gun barrels |
US3063763A (en) * | 1958-12-02 | 1962-11-13 | Chromium Corp Of America | Chromium bearing surface |
US3127331A (en) * | 1959-06-15 | 1964-03-31 | Reverse current electrolytic process | |
US3291667A (en) * | 1961-04-10 | 1966-12-13 | North American Aviation Inc | Etching process for selectively forming workpiece surfaces |
US3438789A (en) * | 1964-02-27 | 1969-04-15 | Schmidt Gmbh Karl | Lubricant coating for friction surfaces and process for producing same |
US3441328A (en) * | 1966-10-20 | 1969-04-29 | Forbes M Hurley | Prelubricated bearing surface,and method of preparing the same |
US4045312A (en) * | 1974-11-30 | 1977-08-30 | Dai Nippon Printing Co., Ltd. | Method for the electrolytic etching of metal workpiece |
US4082632A (en) * | 1975-08-26 | 1978-04-04 | The International Nickel Company, Inc. | Production of perforated metal foil |
US4119514A (en) * | 1977-04-21 | 1978-10-10 | The International Nickel Company, Inc. | Production of perforated metal foil |
US4706417A (en) * | 1984-09-06 | 1987-11-17 | Chromium Corporation | Finish for cylinder liners |
US4862864A (en) * | 1984-09-06 | 1989-09-05 | Chromium Corporation | Finish for cylinder liners |
US4849302A (en) * | 1985-05-24 | 1989-07-18 | Licentia Patent-Verwaltungs-Gmbh | Electrolytically metallized article and processes therefore |
Also Published As
Publication number | Publication date |
---|---|
GB561788A (en) | 1944-06-05 |
NL66417C (en) | |
CH267121A (en) | 1950-03-15 |
FR950941A (en) | 1949-10-11 |
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