US4044217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding surface working method using wire-explosion coating
Assignee: Nippon Tungsten Co Ltd
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Filing: 1975-05-07
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Granted: 1977-08-23
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Expires: 1995-05-07
Abstract
Abstract There is disclosed a sliding surface working method using wire-explosion spray coating according to which the inner surface of an aluminium alloy cylinder is wire-explosion spray coated using a molybdenum wire, molybdenum-tungsten alloy wire, or tungsten wire. Next, the inner surface is alternately and repeatedly wire-explosion spray coated by alternately wire-explosion spraying a carbon steel wire and a wire of a material having good seizure resistance and wear resistance characteristics. Finally, the inner surface thus coated is ground and finished.
Inventors
- 👤 Yukio Otsuki
- 👤 Hiroyuki Matsumoto
- 👤 Hiroshi Ito
- 👤 Shusuke Takezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:24
CPC Classifications
F; F02; F02F; F02F1/00; B; B23; B23K; B23K20/00; B23K20/06; B23K20/08; B23P; B23P15/00; B23P15/10; F16; F16J; F16J10/00; F16J10/02; F16J10/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A method of forming an improved surface in the cylinder of an internal combustion engine comprising the steps of wire-explosion spray coating the inner surface of an aluminium alloy cylinder by using wire material selected from the group consisting of molybdenum wire, molybdenum-tungsten alloy wire and tungsten wire to form a bonding layer; alternately forming on said coating surface a layer which is formed by wire-explosion spraying a carbon steel wire to reinforce the sliding surface and a layer which is formed by wire-explosion spraying a wire of a material having good seizure resistance and wear resistance characteristics; and grinding and finishing the miltilayer-coated inner surface formed by the foregoing steps.
Claim 2
Independent Claim
111 words
A method of forming an improved surface in the cylinder of an internal combustion engine comprising the steps of wire-explosion spray coating the inner surface of an aluminium alloy cylinder by using wire material selected from the group consisting of molybdenum wire, molybdenum-tungsten alloy wire and tungsten wire to form a bonding layer; alternately forming on said coating surface a layer which is formed by wire-explosion spraying a carbon steel wire to reinforce the sliding surface and a layer which is formed by wire-explosion spraying a wire of a material having good seizure resistance and wear resistance characteristics; and grinding and finishing the miltilayer-coated inner surface formed by the foregoing steps.
Claim 3
Dependent Claim
21 words
A method according to claim 1, wherein said wire having good seizure resistance and wear resistance characteristics is a molybdenum wire.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein said wire having good seizure resistance and wear resistance characteristics is a molybdenum-tungsten alloy wire.
Claim 5
Dependent Claim
21 words
A method according to claim 1, wherein said wire having good seizure resistance and wear resistance characteristics is a tungsten wire.
Claim 6
Dependent Claim
21 words
A method according to claim 1, wherein said wire having good seizure resistance and wear resistance characteristics is a chromium wire.
Claim 7
Dependent Claim
22 words
A method according to claim 1, wherein said wire having good seizure resistance and wear resistance characteristics is a nickel-chromium alloy wire.
Claim 8
Dependent Claim
21 words
A method according to claim 1, wherein said wire having good seizure resistance and wear resistance characteristics is a titanium wire.
Claim 9
Dependent Claim
38 words
A method according to claim 7 wherein said carbon steel wire and said titanium wire are alternately wire-explosion sprayed on said bonding layer in a nitrogen gas atmosphere to alternately form and laminate two kinds of nitrogen layers.
Claim 10
Dependent Claim
57 words
A method according to claim 1, wherein after the formation of said bonding layer, an alloy wire material made from steel and material selected from the group consisting of molybdenum, tungsten, chromium and titanium is wire-explosion sprayed onto said bonding layer, whereby an inner surface coating in which the two components exist in mixed state is obtained.
Claim 11
Dependent Claim
57 words
A method according to claim 1, further including the step of bringing said finished wire-explosion spray coated inner surface into contact with a suspended solution selected from powdered molybdenum disulfide and tungsten disulfide while subjecting the inner surface to ultrasonic vibration so that the coating is impregnated with molybdenum disulfide or tungsten disulfide as a solid lubricant.
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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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |