US4180622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant coating for the working face of disc-shape machine parts made of aluminum or aluminum alloys
Assignee: Rio Tinto Switzerland AG
•
Filing: 1978-07-21
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Granted: 1979-12-25
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Expires: 1998-07-21
Abstract
Abstract A wear resistant coating for the working faces of disc-shaped machine parts made of aluminum or aluminum alloys is applied to the parts by thermal spraying. The coating comprises two components, one being aluminum oxide pure or mixed with another oxide and the other aluminum or an aluminum-silicon or aluminum-magnesium alloy. Such a coating, called a cermet, can be used advantageously on brake discs, clutch plates, and the like.
Inventors
- 👤 Kurt Burkhard
- 👤 Peter Kunzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:57
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/027; C; C23; C23C; C23C4/00; C23C4/02; C23C4/04; C23C4/06; F16D65/00; F16D65/02; F16D65/12; F16D65/127; F16D65/125; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
33 words
A thermally applied wear resistant coating for the working faces of disc-shaped machine parts made of aluminum or aluminum alloys, said coating comprising a cermet coating wherein the metallic component thereof contains aluminum.
Claim 2
Dependent Claim
33 words
A thermally applied wear resistant coating for the working faces of disc-shaped machine parts made of aluminum or aluminum alloys, said coating comprising a cermet coating wherein the metallic component thereof contains aluminum.
Claim 3
Dependent Claim
19 words
A wear resistant coating according to claim 1 wherein the ceramic component of said cermet coating contains metallic oxides.
Claim 4
Dependent Claim
55 words
A wear resistant coating according to claim 2 wherein said ceramic component is a material selected from the group consisting of Al 2 O 3 , Al 2 O 3 +TiO 2 , Al 2 O 3 +ZrO 2 , Cr 2 O 3 , and Al 2 O 3 +Cr 2 O 3 .
Claim 5
Dependent Claim
37 words
A wear resistant coating according to claim 1 wherein the aluminum containing component of said cermet coating is selected from the group consisting of pure aluminum, an aluminum alloy containing silicon and an aluminum alloy containing magnesium.
Claim 6
Dependent Claim
33 words
A wear resistant coating according to claim 1 wherein the weight ratio of the ceramic component of said cermet coating to the metal component of said cermet coating lies between 90:10 and 60:40.
Claim 7
Dependent Claim
21 words
A wear resistant coating according to claim 5 wherein the weight ratio of ceramic to metal lies between 85:15 and 75:25.
Claim 8
Dependent Claim
17 words
A wear resistant coating according to claim 1 wherein the said coating is deposited by plasma spraying.
Claim 9
Dependent Claim
23 words
A wear resistant coating according to claim 1 wherein an intermediate adhesive layer is provided between the substrate material and the cermet coating.
Claim 10
Dependent Claim
20 words
A wear resistant coating according to claim 8 wherein the adhesive layer is of aluminum and is 10-100 μm thick.
Claim 11
Dependent Claim
61 words
A wear resistant coating according to claim 1 wherein the said coating is penetrated by holes which do not have a disadvantageous effect on the disc-shaped machine parts, and which are spaced at least 6 mm apart, wherein a straight line joining any two holes makes an angle of at least 30° to the radius drawn through one of the holes.
Claim 12
Dependent Claim
53 words
A wear resistant coating according to claim 1 wherein the said coating is penetrated by slits which do not have a disadvantageous effect on the disc-shaped machine parts, wherein the axis of any of the slits forms an angle of 30° to 60° with a radius passing through the slit in the disc.
Claim 13
Dependent Claim
12 words
A wear resistant coating according to claim 1 applied to brake discs.
Claim 14
Dependent Claim
12 words
A wear resistant coating according to claim 1 applied to clutch plates.
References Cited (Backward Citations)
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US3371756A
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US3485331A
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US3584718A
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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) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |