Patent US3932228A successfully refreshed from Google Patents.
US3932228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal material for sliding surfaces
Assignee: Suzuki Motor Corp
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Filing: 1974-10-29
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Granted: 1976-01-13
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Expires: 1994-10-29
Abstract
Abstract In a metal material having a surface adapted to slide on a surface having a nickel-silicon carbide composite electroplated layer and subjected to a treatment for causing silicon carbide particles to project outward beyond the surface, the surface of the metal material is provided with porous hard chrome plating, whereby a lubricant may be deposited and retained in the porous plated layer.
Inventors
- 👤 Masashi Sugiyama
- 👤 Takumi Kunikiyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:43
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/005; C; C25; C25D; C25D15/00; C25D15/02; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16J; F16J9/00; F16J9/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
In combination, a first member containing a surface of porous hard chromium, and a second member containing a composite electroplated surface wherein silicon carbide particles project outwardly beyond a nickel matrix, said surface of porous hard chromium and said composite electroplated surface being in sliding engagement, whereby lubricant may be retained both by said porous hard chromium and on said composite electroplated surface between said projecting silicon carbide particles.
Claim 2
Dependent Claim
69 words
In combination, a first member containing a surface of porous hard chromium, and a second member containing a composite electroplated surface wherein silicon carbide particles project outwardly beyond a nickel matrix, said surface of porous hard chromium and said composite electroplated surface being in sliding engagement, whereby lubricant may be retained both by said porous hard chromium and on said composite electroplated surface between said projecting silicon carbide particles.
Claim 3
Dependent Claim
34 words
The combination set forth in claim 1 wherein said surface of porous hard chromium is plated onto a first backing member, and wherein said composite electroplated surface is plated onto a second backing member.
Claim 4
Dependent Claim
99 words
The combination set forth in claim 2 in which said first backing member is a cast iron comprising 3.5 to 4.2 percent of total carbon, 2.2 to 3.4 percent of silicon, 0.5 to 1.0 percent of manganese, 0.2 percent at the most of phosphorous, 0.05 percent at the most of sulfur, and a remainder of iron and having a modulus of elasticity of the order of 17,000 kg/mm 2 , a transverse ruption strength of at least 100 kg/mm 2 a hardness of 100 to 110 HrB, and a decrease in tensile strength of 7 percent at the most.
Claim 5
Dependent Claim
65 words
The combination set forth in claim 2 wherein said first backing member is a piston ring of a piston for operating cooperatively with a cylinder, the porous hard chromium surface being plated on the sliding surfaces of the piston ring, and wherein the nickel-silicon carbide composite electroplated surface is disposed on and lines the inner surface of the cylinder which comprises said second backing member.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |