Patent US4077637A successfully refreshed from Google Patents.
US4077637A
Expired / Lapsed
US
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Ceramic coated piston rings
Assignee: KAYDON ACQUISITION Inc A DE CORP
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Filing: 1977-01-17
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Granted: 1978-03-07
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Expires: 1997-01-17
Abstract
Abstract Piston rings for internal combustion engines having the bearing face plasma sprayed with a superior scuff and wear resistant material. The bearing surface of the rings is plasma jet sprayed with a bond coat comprised of nickel, chromium and aluminum and a scuff and wear resistant coating of aluminum oxide, titanium dioxide and ferric oxide.
Inventors
- 👤 Glenn F. Hyde
- 👤 Thomas W. Alban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:14
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/26; C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49281
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
A piston ring having a scuff and wear resistant coating comprised of 91-95 percent aluminum oxide, 0-5 percent titanium dioxide and 0-4 percent ferric oxide by weight, said scuff and wear resistant coating being plasma sprayed on said piston ring.
Claim 2
Dependent Claim
40 words
A piston ring having a scuff and wear resistant coating comprised of 91-95 percent aluminum oxide, 0-5 percent titanium dioxide and 0-4 percent ferric oxide by weight, said scuff and wear resistant coating being plasma sprayed on said piston ring.
Claim 3
Dependent Claim
22 words
The piston ring of claim 1 wherein a nickle-chromium aluminum bond coat is plasma sprayed on said ring to underlay said coating.
Claim 4
Dependent Claim
24 words
The piston ring of claim 2 wherein said coating consists of 94 percent aluminum oxide, 3 percent titanium dioxide and 3 percent ferric oxide.
Claim 5
Dependent Claim
27 words
The piston ring of claim 3 wherein said bond coat consists of 80 percent nickle, 20 percent chromium with approximately 6 percent aluminum bonded thereto by weight.
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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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |