US3880600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricating slide element
Assignee: BBC Brown Boveri AG Switzerland
•
Filing: 1973-04-10
•
Granted: 1975-04-29
•
Expires: 1993-04-10
Abstract
Abstract A self-lubricating slide component is made from a sintered material which includes graphite in a metal phase. The metal phase consists of one or more nitride or carbo-nitride forming metal elements and which are located at least partially in the region of the surface of the slide component.
Inventors
- 👤 Josef Zboril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; B; B22; B22F; B22F3/00; B22F3/24; C22C33/0207; C22C33/0228; C22C33/0285; B22F2201/00; B22F2201/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
79 words
A self-lubricating slide component consisting essentially of a sintered material which includes graphite in a matrix consisting essentially of metal components, said metal components consisting at least partially of one or more nitride-or carbo-nitride-forming metal elements, and said metal elements in the surface zone of the slide component hAving at least partially the form of their nitrides or carbo-nitrides, said slide component being characterized by a hard and wear-resistant surface zone and a softer but still tough inner zone.
Claim 2
Dependent Claim
79 words
A self-lubricating slide component consisting essentially of a sintered material which includes graphite in a matrix consisting essentially of metal components, said metal components consisting at least partially of one or more nitride-or carbo-nitride-forming metal elements, and said metal elements in the surface zone of the slide component hAving at least partially the form of their nitrides or carbo-nitrides, said slide component being characterized by a hard and wear-resistant surface zone and a softer but still tough inner zone.
Claim 3
Dependent Claim
37 words
A self-lubricating slide component as defined in claim 1 wherein the metal components, in addition to the nitride- or carbo-nitride-forming metal elements contain a member of the group consisting of copper, nickel, tin, lead, zinc and antimony.
Claim 4
Dependent Claim
51 words
A self-lubricating slide component as defined in claim 1, consisting of, by weight, 8% graphite, 60% iron alloy subjected to nitriding and the remainder nickel and copper, the iron alloy consisting essentially of by weight approximately 12% chromium, 0.5% nickel, 1.0% molybdenum, 0.3% vanadium, 0.3% tungsten and 0.1% niobium, balance iron.
Claim 5
Dependent Claim
46 words
A self-lubricating slide component as defined in claim 1 containing by weight 8% graphite, 60% iron alloy subjected to nitriding and the remainder nickel and copper, the iron alloy consisting essentially of by weight approximately, 1.0% aluminum, 1.7% chromium, 0.2% molybdenum and 1.0% nickel, balance iron.
Claim 6
Dependent Claim
32 words
A self-lubricating slide component as defined in claim 1 and which contains from 10 to 90% by weight of the nitride-or carbo-nitride-forming metal elements and wherein said metal elements are iron alloys.
Claim 7
Dependent Claim
17 words
A self-lubricating slide component as defined in claim 5 wherein the iron alloy is an iron-aluminum alloy.
Claim 8
Dependent Claim
23 words
A self-lubricating slide component as defined in claim 6 wherein the iron aluminum alloy contains between 0.2 and 2.0% by weight of aluminum.
Claim 9
Dependent Claim
17 words
A self-lubricating slide component as defined in claim 5 wherein the iron alloy is an iron-aluminum-chromium alloy.
Claim 10
Dependent Claim
36 words
A self-lubricating slide component as defined in claim 8 wherein the iron-aluminum-chromium alloy contains approximately, by weight, 1% of aluminum, 1.0 to 2.0% of chromium, up to 0.6% of molybdenum, and up to 0.6% of vanadium.
Claim 11
Dependent Claim
17 words
A self-lubricating slide component as defined in claim 5 wherein the iron alloy is an iron-chromium alloy.
Claim 12
Dependent Claim
22 words
A self-lubricating slide component as defined in claim 10 wherein the iron-chromium alloy contains between 1 and 30%, by weight, of chromium.
Claim 13
Dependent Claim
17 words
A self-lubricating slide component as defined in claim 5 wherein the iron alloy is an iron-nickel-chromium alloy.
Claim 14
Dependent Claim
23 words
A self-lubricating slide component as defined in claim 12 wherein the iron-nickel-chromium alloy contains, by weight, 18% of nickel and 8% of chromium.
Claim 15
Dependent Claim
30 words
A SELF-LUBRICATING SLIDE COMPONENT AS DEFINED IN CLAIM 1 CONTAINING 8% BY WEIGHT OF GRAPHITE, 70% BY WEIGHT, OF IRON SUBJECTED TO NITRIDING AND THE REMAINDER BEING NICKEL AND COPPER.
References Cited (Backward Citations)
US2448369A
Cited
US2725265A
Cited
US2906007A
Cited
US2994600A
Cited
US3282746A
Cited
US3377214A
Cited
US3741733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |