US3896009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy cylinder
Assignee: Kioritz Corp
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Filing: 1974-07-09
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Granted: 1975-07-22
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Expires: 1994-07-09
Abstract
Abstract An improved aluminum-silicon hypereutectic alloy cylinder is provided by the following steps: machining the sliding surface of the cylinder to given dimensions; finishing the sliding surface to a degree that the primary crystal grains of silicon clearly appear; subjecting the finished surface to acid pickling to remove to a given depth the eutectic aluminum solid solution surrounding the primary crystal grains of silicon; subjecting the thus treated finished surface to a pickling-activating treatment which does not substantially corrode the primary crystals of silicon but retains them intact; electroplating a metal or alloy onto the sliding surface to give a layer flush with the top finished surfaces of the primary crystal grains of silicon, the type of metal or alloy electroplated depending on the contemplated member mating, to thereby improve the sliding performance of the sliding surface; whereby the top surfaces of the primary crystal grains of silicon and the electroplated metal surfaces provide the desired sliding surface in combination.
Inventors
- 👤 Torao Kobayashi
- 👤 Chikato Ninagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:18
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44; F; F02; F02F; F02F1/00; F16; F16J; F16J10/00; F16J10/02; F16J10/04; F02F7/00; F02F7/0085; F02F2007/009; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0469; F05C2201/0475; F05C2203/00; F05C2203/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S417/00; Y10S417/01; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12701; Y10T428/12708; Y10T428/12736; Y10T428/1275
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
IN A PROCESS FOR PROVIDING AN ALUMINUMSILICON HYPEREUTECTIC ALLOY CYLINDER, THE IMPROVEMENTS COMPRISING THE STEPS OF: MACHINING AND FINISHING THE SLIDING SURFACE OF SAID CYLINDER TO A GIVEN DIMENSION SO THAT FINISHED PRIMARY CRYSTAL GRAINS OF SILICON CLEARLY APPEAR ON SAID SLIDING SURFACE, SUBJECTING SAID FINISHED SURFACE TO PICKLING ACTIVATING TREATMENT TO REMOVE EUTECTIC ALUMINUM SOLID SOLUTION SURROUNDING THE PRIMARY CRYSTAL GRAINS OF SILICON TO A GIVEN DEPTH IN THE MANNER THAT SAID PRIMARY CRYSTAL GRAINS OF SILICON ARE NOT SUBSTANTIALLY CORRODED AND ARE LEFT INTACT, ELECTROPLATING ON SAID SLIDING SURFACE HAVING THUS BEEN TREATED BY SAID PICKLING-ACTIVATING TREATMENT A METAL OR ALLOY WHICH IS CAPABLE OF IMPROVING THE SLIDING PERFORMANCE OF SAID SLIDING SURFACE IN RELATION TO A MATING SURFACE, SAID METAL OR ALLOY BEING SELECTED FROM THE GROUP CONSISTING OF LEAD, TIN, COPPER, ZINC, IRON, NICKEL, SILVER, AND ALLOYS THEREOF, WHEREBY SAID ELECTROPLATED METAL SURFACES AND THE TOP FINISHED SURFACES OF PRIMARY CRYSTAL GRAIN SILICON PROVIDE A DESIRED SLIDING SURFACE IN COMBINATION.
Claim 2
Dependent Claim
164 words
IN A PROCESS FOR PROVIDING AN ALUMINUMSILICON HYPEREUTECTIC ALLOY CYLINDER, THE IMPROVEMENTS COMPRISING THE STEPS OF: MACHINING AND FINISHING THE SLIDING SURFACE OF SAID CYLINDER TO A GIVEN DIMENSION SO THAT FINISHED PRIMARY CRYSTAL GRAINS OF SILICON CLEARLY APPEAR ON SAID SLIDING SURFACE, SUBJECTING SAID FINISHED SURFACE TO PICKLING ACTIVATING TREATMENT TO REMOVE EUTECTIC ALUMINUM SOLID SOLUTION SURROUNDING THE PRIMARY CRYSTAL GRAINS OF SILICON TO A GIVEN DEPTH IN THE MANNER THAT SAID PRIMARY CRYSTAL GRAINS OF SILICON ARE NOT SUBSTANTIALLY CORRODED AND ARE LEFT INTACT, ELECTROPLATING ON SAID SLIDING SURFACE HAVING THUS BEEN TREATED BY SAID PICKLING-ACTIVATING TREATMENT A METAL OR ALLOY WHICH IS CAPABLE OF IMPROVING THE SLIDING PERFORMANCE OF SAID SLIDING SURFACE IN RELATION TO A MATING SURFACE, SAID METAL OR ALLOY BEING SELECTED FROM THE GROUP CONSISTING OF LEAD, TIN, COPPER, ZINC, IRON, NICKEL, SILVER, AND ALLOYS THEREOF, WHEREBY SAID ELECTROPLATED METAL SURFACES AND THE TOP FINISHED SURFACES OF PRIMARY CRYSTAL GRAIN SILICON PROVIDE A DESIRED SLIDING SURFACE IN COMBINATION.
Claim 3
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is lead.
Claim 4
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is copper.
Claim 5
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is zinc.
Claim 6
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is iron.
Claim 7
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is silver.
Claim 8
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is nickel.
Claim 9
Dependent Claim
22 words
A cylinder of aluminum alloy as defined in claim 1, wherein the cylinder has a sliding surface whose electroplated metal is tin.
References Cited (Backward Citations)
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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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |