US3860508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installations for forming an electrolytic coating
Assignee: Automobiles Citroen SA
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Filing: 1972-11-07
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Granted: 1975-01-14
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Expires: 1992-11-07
Abstract
Abstract The installation comprises a tank containing a bath of electrolyte, containing particles of silicon carbide, an anode (e.g. of titanium) and a cathode, means for stacking several identical members, enabling the cathode of the installation to be constituted by a stack of members, means for introducing the stack into the bath of the tank and for withdrawing said stack, and an anode comprising a compartment in which are arranged blocks of the metal to be deposited on the members. Means are provided for maintaining the anode in said tank when the cathode is withdrawn and the anode is surrounded by a bag with very fine mesh adapted to retard the entry, into the anode compartment, of said solid particles from the electrolytic bath. The installation further includes means to feed anolyte directly to the anode chamber, independently from the electrolytic bath of the tank. The installation is especially valuable for coating the trochoidal inner walls of rotary piston engine casings.
Inventors
- 👤 Michel Durin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:45
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
INSTALLATION FOR FORMING AN ELECTROLYTIC COATING ON THE WALLS OF MEMBERS EXPOSED TO FRICTIONAL FORCES, ESPECIALLY ON THE TROCHOIDAL INNER WALLS OF ROTARY PISTON ENGINE CASINGS, SAID INSTALLATION COMPRISING: A TANK ARRANGED TO CONTAIN A BATH OF ELECTROLYTE INCLUDING SOLID PARTICLES OF SMALL SIZE, AN ANODE AND A CATHODE, MEANS FOR STACKING SEVERAL IDENTICAL MEMBERS, ENABLING THE CATHODE OF THE INSTALLATION TO BE CONSTITUTED BY A STACK OF MEMBERS, MEANS FOR INTRODUCING THE STACK INTO THE BATH OF THE TANK AND WITHDRAWING SAID STACK, THE ANODE COMPRISING A COMPARTMENT IN WHICH ARE ARRANGED BLOCKS OF A METAL TO BE DEPOSITED ON THE MEMBERS, MEANS FOR MAINTAINING THE ANODE IN SAID TANK WHEN THE CATHODE IS WITHDRAWN AND, SURROUNDING THE ANODE, A BAG OF VERY FINE MESH ADAPTED TO RETARD THE ENTRY, INTO THE ANODE COMPARTMENT, OF SAID SOLID PARTICLES FROM THE ELECTROLYTIC BATH, AND MEANS FOR FEEDING ANOLYTE DIRECTLY TO THE ANODIC COMPARTMENT, AND INDEPENDENTLY FROM THE ELECTROLYTIC BATH OF THE TANK.
Claim 2
Dependent Claim
162 words
INSTALLATION FOR FORMING AN ELECTROLYTIC COATING ON THE WALLS OF MEMBERS EXPOSED TO FRICTIONAL FORCES, ESPECIALLY ON THE TROCHOIDAL INNER WALLS OF ROTARY PISTON ENGINE CASINGS, SAID INSTALLATION COMPRISING: A TANK ARRANGED TO CONTAIN A BATH OF ELECTROLYTE INCLUDING SOLID PARTICLES OF SMALL SIZE, AN ANODE AND A CATHODE, MEANS FOR STACKING SEVERAL IDENTICAL MEMBERS, ENABLING THE CATHODE OF THE INSTALLATION TO BE CONSTITUTED BY A STACK OF MEMBERS, MEANS FOR INTRODUCING THE STACK INTO THE BATH OF THE TANK AND WITHDRAWING SAID STACK, THE ANODE COMPRISING A COMPARTMENT IN WHICH ARE ARRANGED BLOCKS OF A METAL TO BE DEPOSITED ON THE MEMBERS, MEANS FOR MAINTAINING THE ANODE IN SAID TANK WHEN THE CATHODE IS WITHDRAWN AND, SURROUNDING THE ANODE, A BAG OF VERY FINE MESH ADAPTED TO RETARD THE ENTRY, INTO THE ANODE COMPARTMENT, OF SAID SOLID PARTICLES FROM THE ELECTROLYTIC BATH, AND MEANS FOR FEEDING ANOLYTE DIRECTLY TO THE ANODIC COMPARTMENT, AND INDEPENDENTLY FROM THE ELECTROLYTIC BATH OF THE TANK.
Claim 3
Dependent Claim
51 words
Installation according to claim 1, wherein the means for feeding the anolyte are adapted to establish a circulation of anolyte in the anodic compartment and comprise a pump, a filter and passages provided in the anode to connect the anodic compartment respectively to evacuation and to delivery from the pump-filter assembly.
Claim 4
Dependent Claim
30 words
Installation according to claim 1, wherein the means for feeding the anolyte are adapted to establish a pressure of anolyte in the anodic compartment greater than that of the catholyte.
Claim 5
Dependent Claim
28 words
Installation according to claim 3, wherein the anodic compartment in which the anolyte is located is closed and adapted to be kept under pressure by a feed pump.
Claim 6
Dependent Claim
46 words
Installation according to claim 3, in which the anodic compartment wherein the anolyte is located is open, and comprising means for the supply of the said compartment with anolyte adapted to keep the level of the latter above the level of the electrolyte of the tank.
Claim 7
Dependent Claim
33 words
Installation according to claim 1, comprising means for fixing the anode adapted to keep the latter immobile with respect to the tank, especially when the cathode is immersed in the bath and agitated.
Claim 8
Dependent Claim
102 words
Installation according to claim 1, wherein the anode comprises automatic locking means adapted to cooperate with a frame supporting the cathode and arranged so as to establish a mechanical connection between said frame and the anode in the course of the operation of electrolytic coating during which the anode and cathode are agitated, said locking means being adapted to be opened when at the end of the coating operation, the assembly of the anode, of the frame and of the cathode being positioned on the bottom of the tank so that only the cathode and its frame are withdrawn from the tank.
Claim 9
Dependent Claim
48 words
Installation according to claim 7, wherein the anode comprises at its lower portion radial arms whose ends are adapted to cooperate with housings provided in the lower portion of the frame of the cathode to ensure angular positioning and relative centering of the anode and of the cathode.
Claim 10
Dependent Claim
55 words
Installation according to claim 7, comprising a flexible auxiliary current input of small cross-section, at the lower portion of the anode, so that immersion of the cathode can be effected under current flow, and automatic locking means being adapted to establish an anode contact for the passage of a current enabling a progressive current density.
Claim 11
Dependent Claim
18 words
Installation according to claim 1, wherein said tank is adapted to contain electrolyte including particles of silicon carbide.
Claim 12
Dependent Claim
63 words
Anode for the installation according to claim 1, comprising a central body, provided with a recess in which are adapted to be arranged the blocks of the metal to be deposited on the members, the recess being surrounded by an expanded sheet, said sheet being covered by the bag of fine mesh adapted to retard the entry of fine particles into said recess.
Claim 13
Dependent Claim
20 words
Anode according to claim 11, wherein at least one of said central body and said expanded sheet is of titanium.
Claim 14
Dependent Claim
17 words
Anode according to claim 11, wherein both said central body and said expanded sheet are of titanium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |