US4251599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrous metal body coated with an alloy formed by an iron/silicon extended molybdenum plasma spray powder
Assignee: Sanford Acquisition Co
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Filing: 1979-08-23
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Granted: 1981-02-17
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Expires: 1999-08-23
Abstract
Abstract There is provided an improved plasma spray powder composition for producing bearing surface alloy on a metal substrate, e.g. cast iron, said powder being characterized by the presence therein of a substantial amount of iron, molybdenum and a relatively small amount of silicon. Carbon may also desirably be present in the powder. When plasma sprayed, these powders yield a coating on a metal substrate, e.g. a cast iron piston ring, which is wear and scuff resistant.
Inventors
- 👤 Harold McCormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/067; F; F16; F16J; F16J9/00; F16J9/26; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
A piston ring having a ferrous metal body and a coating forming the bearing surface thereof which coating is a plasma jet sprayed alloy formed from a plasma spray feed powder mixture consisting essentially of molybdenum, iron and silicon, the weight ratio of iron to molybdenum in said powder being in the range of from 9:1 to 3.2:1, said iron and molybdenum constituting from 90% to 99% by weight of said powder, and the silicon being present in the range of from about 0.4% to 6.0% by weight of said powder, said powder having a particle size such that at least 95% passes through a 170 mesh screen.
Claim 2
Dependent Claim
108 words
A piston ring having a ferrous metal body and a coating forming the bearing surface thereof which coating is a plasma jet sprayed alloy formed from a plasma spray feed powder mixture consisting essentially of molybdenum, iron and silicon, the weight ratio of iron to molybdenum in said powder being in the range of from 9:1 to 3.2:1, said iron and molybdenum constituting from 90% to 99% by weight of said powder, and the silicon being present in the range of from about 0.4% to 6.0% by weight of said powder, said powder having a particle size such that at least 95% passes through a 170 mesh screen.
Claim 3
Dependent Claim
26 words
The piston ring as described in claim 1 in which said plasma spray feed powder mixture further includes 0 to about 3.5% by weight powdered carbon.
Claim 4
Dependent Claim
26 words
The piston ring as described in claim 1 in which said plasma spray feed powder mixture further include 0 to about 2.4% by weight powdered manganese.
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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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |