Patent US4233072A successfully refreshed from Google Patents.
US4233072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding member having wear- and scuff-resistant coating on its surface
Assignee: Riken Corp
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Filing: 1978-06-15
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Granted: 1980-11-11
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Expires: 1998-06-15
Abstract
Abstract A sliding member having a coating especially suitable for a piston ring or a cylinder liner in which excellent wear- and scuff-resistance, as well as excellent initial wear-in property are required. The coating is produced by plasma-arc flame spraying a mixed powder comprising molybdenum powder, nickel-chromium alloy powder and titanium carbide powder on a base surface of the sliding member made of iron or steel.
Inventors
- 👤 Tamotu Watanabe
- 👤 Tatsuei Sakata
- 👤 Yoshikuni Mizuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:09
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/26; C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A sliding member having a wear resistant coating produced by plasma-arc spraying a mixture comprising 60 to 85% by weight of molybdenum powder, 10 to 30% by weight of nickel-chromium alloy powder and 5 to 20% by weight of titanium carbide powder on its sliding surface.
Claim 2
Dependent Claim
46 words
A sliding member having a wear resistant coating produced by plasma-arc spraying a mixture comprising 60 to 85% by weight of molybdenum powder, 10 to 30% by weight of nickel-chromium alloy powder and 5 to 20% by weight of titanium carbide powder on its sliding surface.
Claim 3
Dependent Claim
24 words
The sliding member of claim 1 wherein the ratio of nickel to chromium content of the nickel-chromium alloy powder is about 4:1 by weight.
Claim 4
Dependent Claim
31 words
The sliding member of claim 2 wherein said mixture comprising 75% by weight of molybdenum powder, 15% by weight of nickel-chromium alloy powder and 10% by weight of titanium carbide powder.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |