US3894957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-lead alloys for lubricants and bearings
Assignee: Individual
•
Filing: 1973-01-04
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Granted: 1975-07-15
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Expires: 1993-01-04
Abstract
Abstract This disclosure is directed to copper-lead alloys for lubricants and bearings. The copper-lead alloys have a fine and even dispersion of the lead particles in a copper matrix. The alloy is made by adding an effective amount of a homogeneity promoter to a mixture of molten lead and copper. The promoter comprises elemental carbon and an alkali and/or alkaline earth metal compound capable of reacting to form a gas, or a rare earth metal compound in the form of an oxide or carbonate. The lubricants comprise the copper-lead alloy in powdered form, as a dry lubricant, in a carrier, or in a base of a grease or oil. The bearings comprise the copper-lead alloy as a load-bearing surface.
Inventors
- 👤 Charles E Lundin
- 👤 Robert Turkisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:00
CPC Classifications
C; C10; C10M; C10M103/00; C10M103/04; C10M125/00; C10M125/04; C22; C22C; C22C1/00; C22C1/02; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121; C10M2201/00; C10M2201/04; C10M2201/05; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
A LUBRICATING MATERIAL COMPRISING AN OIL OR GREASE WHICH HAS DISTRIBUTED THEREIN A POWDERED HOMOGENEOUS ALLOY, SAID ALLOY CONTAINING COPPER AND LEAD AND TRACE REMNANTS OF THE PRODUCTS FROM A HOMOGENEITY PREMOTER IN MOLTEN COPPER AND LEAD, SAID HOMOGENEITY PROMOTER COMPRISING ELEMENTAL CARBON AND A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF AN ALKALI METAL AND AN ALKALINE EARTH METAL.
Claim 2
Dependent Claim
63 words
A LUBRICATING MATERIAL COMPRISING AN OIL OR GREASE WHICH HAS DISTRIBUTED THEREIN A POWDERED HOMOGENEOUS ALLOY, SAID ALLOY CONTAINING COPPER AND LEAD AND TRACE REMNANTS OF THE PRODUCTS FROM A HOMOGENEITY PREMOTER IN MOLTEN COPPER AND LEAD, SAID HOMOGENEITY PROMOTER COMPRISING ELEMENTAL CARBON AND A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF AN ALKALI METAL AND AN ALKALINE EARTH METAL.
Claim 3
Dependent Claim
26 words
The lubricating material of claim 1 wherein said alloy comprises from a trace up to about 4 ounces of alloy per pound of oil or grease.
Claim 4
Dependent Claim
16 words
The lubricating material of claim 1 wherein said metal compound is sodium carbonate or potassium carbonate.
Claim 5
Dependent Claim
52 words
The lubricating material of claim 1 wherein said alloy comprises about 5 to 55% lead, and about 95 to 45% copper wherein the lead is in the form of a fine dispersion in a copper matrix, and the average diameter of said lead particles is between about 0.002 mm to 0.02 mm.
Claim 6
Dependent Claim
45 words
The lubricating material of claim 1 wherein said alloy comprises about 20 to 45% lead, wherein the lead is in the form of a fine dispersion in a copper matrix, and the average diameter of said lead particles is between about 0.002 to 0.01 mm.
Claim 7
Dependent Claim
20 words
The lubricating material of claim 1 wherein said alloy has an average particle size of about 6 to 10 microns.
Claim 8
Dependent Claim
13 words
The lubricating material of claim 1 wherein said alloy comprises about 20-45% lead.
Claim 9
Dependent Claim
53 words
A composition comprising a powdered homogeneous alloy consisting essentially of copper and lead, and a homogeneity promoter which is the reaction product of elemental carbon with an alkali metal compound selected from the group consisting of sodium carbonate and potassium carbonate in molten copper and lead, and a petroleum or vegetable based lubricant.
Claim 10
Dependent Claim
53 words
A composition comprising a powdered homogeneous alloy consisting essentially of copper and lead, and a homogeneity promoter which is the reaction product of elemental carbon with an alkali metal compound selected from the group consisting of sodium carbonate and potassium carbonate in molten copper and lead, and a petroleum or vegetable based lubricant.
Claim 11
Dependent Claim
20 words
The composition of claim 8 wherein the alloy comprises from a trace to 4 ounces per pound of said lubricant.
Claim 12
Dependent Claim
12 words
The composition of claim 8 wherein said alloy comprises about 20-45% lead.
Claim 13
Dependent Claim
85 words
A composition comprising a powdered homogeneous alloy comprising a mixture of copper and lead, wherein said mixture comprises from 5-55% lead and from 95-45% copper, and wherein the total of said lead and copper in said mixture is at least 90%, and trace remnants of the products from a homogeneity promoter in molten copper and lead, said homogeneity promoter comprising elemental carbon and a rare earth metal compound selected from the group consisting of oxides, carbonates and halocarbonates, and a petroleum or vegetable based lubricant.
Claim 14
Dependent Claim
85 words
A composition comprising a powdered homogeneous alloy comprising a mixture of copper and lead, wherein said mixture comprises from 5-55% lead and from 95-45% copper, and wherein the total of said lead and copper in said mixture is at least 90%, and trace remnants of the products from a homogeneity promoter in molten copper and lead, said homogeneity promoter comprising elemental carbon and a rare earth metal compound selected from the group consisting of oxides, carbonates and halocarbonates, and a petroleum or vegetable based lubricant.
Claim 15
Dependent Claim
20 words
The composition of claim 11 wherein the alloy comprises from a trace to 4 ounces per pound of said lubricant.
Claim 16
Dependent Claim
14 words
The composition of claim 11 wherein said alloy comprises about 20 - 45% lead.
Claim 17
Dependent Claim
48 words
A composition comprising a powdered homogeneous alloy comprising copper and lead, and trace remnants from a homogeneity promoter comprising elemental carbon and an alkali or alkaline earth metal compound capable of reacting to form a gas in molten copper and lead, and a petroleum or vegetable based lubricant.
Claim 18
Dependent Claim
48 words
A composition comprising a powdered homogeneous alloy comprising copper and lead, and trace remnants from a homogeneity promoter comprising elemental carbon and an alkali or alkaline earth metal compound capable of reacting to form a gas in molten copper and lead, and a petroleum or vegetable based lubricant.
Claim 19
Dependent Claim
20 words
The composition of claim 14 wherein the alloy comprises from a trace to 4 ounces per pound of said lubricant.
Claim 20
Dependent Claim
14 words
The composition of claim 14 wherein said alloy comprises about 20 - 45% lead.
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |