US3797084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a fine dispersion aluminum base bearing
Assignee: JPI Transportation Products Inc
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Filing: 1972-12-18
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Granted: 1974-03-19
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Expires: 1992-12-18
Abstract
Abstract A mixture of metals composed predominantly of aluminum and the balance bearing phase materials are heated to a molten state, ejected through an orifice and atomized by impinging a stream of cold water against the molten metal to effect a rapid drop in temperature as well as solidification. A layer of the resulting pre-alloyed particles are roll compacted simultaneously with a sacrificial surface layer and a bottom bonding layer, both being composed of aluminum base particulate materials. The bottom layer is devoid of bearing phase materials. The tri-layer strip is sintered, roll clad onto a backing member and post-annealed, blanked and formed into a bearing which is bored to remove the sacrificial layer.
Inventors
- 👤 R Fedor
- 👤 W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:12
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/233; B23K20/2333; B22; B22F; B22F7/00; B22F7/02; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/14; F16C2220/00; F16C2220/20; F16C2220/80; F16C2220/82; F16C2223/00; F16C2223/30; F16C2223/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49709; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/1209
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
256 words
A method of making a bearing strip comprising the steps of: simultaneously roll compacting three distinct layers of aluminum base powder particles, in which the bottom layer of said layers constitutes a powder metal bonding layer consisting essentially of more than 55 weight percent aluminum and the balance selected from a first group of additives consisting of silicon, copper, manganese, magnesium, nickel, iron, zinc, chromium, zirconium and titanium; the intermediate layer of said layers constituting a powder metal bearing layer consisting essentially of at least 55 weight percent aluminum and the balance selected from said first group of materials in an amount of 0 to about 20 weight percent and from a second group composed of bearing phase materials in the amount of 5 to 25 weight percent, said second group consisting of lead, tin, cadmium, bismuth and antimony; the surface layer of said layers constituting a sacrificial layer deposited on said powder metal bearing layer and consisting essentially of more than 50 weight percent of aluminum particles and the balance of additives selected from said first and second groups; at least all of said aluminum and said bearing phase materials of said bearing layer being placed in pre-alloyed particle form to establish an intra-particle position relative to each other; and the bearing phase particles in said sacrificial layer being formed for establishing an interstitial position therein relative to the aluminum particles; sintering the tri-layer composite; roll cladding the bonding layer face to face onto a rigid backing layer; and thereafter removing said sacrificial surface layer.
Claim 2
Independent Claim
256 words
A method of making a bearing strip comprising the steps of: simultaneously roll compacting three distinct layers of aluminum base powder particles, in which the bottom layer of said layers constitutes a powder metal bonding layer consisting essentially of more than 55 weight percent aluminum and the balance selected from a first group of additives consisting of silicon, copper, manganese, magnesium, nickel, iron, zinc, chromium, zirconium and titanium; the intermediate layer of said layers constituting a powder metal bearing layer consisting essentially of at least 55 weight percent aluminum and the balance selected from said first group of materials in an amount of 0 to about 20 weight percent and from a second group composed of bearing phase materials in the amount of 5 to 25 weight percent, said second group consisting of lead, tin, cadmium, bismuth and antimony; the surface layer of said layers constituting a sacrificial layer deposited on said powder metal bearing layer and consisting essentially of more than 50 weight percent of aluminum particles and the balance of additives selected from said first and second groups; at least all of said aluminum and said bearing phase materials of said bearing layer being placed in pre-alloyed particle form to establish an intra-particle position relative to each other; and the bearing phase particles in said sacrificial layer being formed for establishing an interstitial position therein relative to the aluminum particles; sintering the tri-layer composite; roll cladding the bonding layer face to face onto a rigid backing layer; and thereafter removing said sacrificial surface layer.
Claim 3
Dependent Claim
62 words
A method of making a bearing strip according to claim 1, wherein the material forming the intermediate layer is produced by heating at least the aluminum and the bearing phase thereof until the materials form a single, liquid phase, molten mass and then atomizing said molten mass and effecting a rapid drop in temperature in the atomized particles to solidify the latter.
Claim 4
Dependent Claim
19 words
A method of making a bearing strip according to claim 1, and passing said composite through an annealing furnace.
Claim 5
Dependent Claim
22 words
A method of making a bearing strip according to claim 1, and blanking and forming the resulting bearing strip into a bearing.
Claim 6
Dependent Claim
30 words
A method of making a bearing strip according to claim 1, wherein said molten mass is ejected through an orifice and disintegrated by an application of a stream of fluid.
Claim 7
Dependent Claim
34 words
A method of making a bearing strip according to claim 1, wherein said mixture of metals is heated in a crucible and the metals placed into said crucible are a mixture of elemental constituents.
Claim 8
Dependent Claim
32 words
A method of making a bearing strip according to claim 1, wherein said mixture of metals is heated in a crucible and said metals comprise a mixture of elemental and alloyed constituents.
Claim 9
Dependent Claim
29 words
A method of making a bearing strip according to claim 1, wherein said mixture of metals is heated in a crucible and said metals comprise a mixture of alloys.
Claim 10
Independent Claim
250 words
A method of making a bearing strip comprising the steps of: simultaneously roll compactors three distinct layers of aluminum base powder particles, in which the bottom layer of said layers constitutes a powder metal bonding layer consisting essentially of more than 55 weight percent aluminum and the balance selected from a first group of additives consisting of silicon, copper, manganese, magnesium, nickel, iron, zinc, chromium, zirconium and titanium; the intermediate layer of said layers constituting a powder metal bearing layer consisting essentially of at least 55 weight percent aluminum and the balance selected from said first group of materials in an amount of 0 to about 20 weight percent and from a second group composed of bearing phase materials in the amount of 5 to 25 weight percent, said second group consisting of lead, tin cadmium, bismuth and antimony; the surface layer of said layer constituting a sacrificial layer deposited of said powder metal bearing layer and consisting essentially of more than 50 weight percent of aluminum particles and the balance of additives selected from said first and second groups; at least all of said aluminum and said bearing phase materials of said bearing layer being placed in pre-alloyed particle form to establish an intra-particle position relative to each other; and the bearing phase particles in said sacrificial layer being formed for establishing an interstitial position therein relative to the aluminum particles; sintering the tri-layer composite, and roll cladding the bonding layer face to face onto a rigid backing layer.
Claim 11
Independent Claim
250 words
A method of making a bearing strip comprising the steps of: simultaneously roll compactors three distinct layers of aluminum base powder particles, in which the bottom layer of said layers constitutes a powder metal bonding layer consisting essentially of more than 55 weight percent aluminum and the balance selected from a first group of additives consisting of silicon, copper, manganese, magnesium, nickel, iron, zinc, chromium, zirconium and titanium; the intermediate layer of said layers constituting a powder metal bearing layer consisting essentially of at least 55 weight percent aluminum and the balance selected from said first group of materials in an amount of 0 to about 20 weight percent and from a second group composed of bearing phase materials in the amount of 5 to 25 weight percent, said second group consisting of lead, tin cadmium, bismuth and antimony; the surface layer of said layer constituting a sacrificial layer deposited of said powder metal bearing layer and consisting essentially of more than 50 weight percent of aluminum particles and the balance of additives selected from said first and second groups; at least all of said aluminum and said bearing phase materials of said bearing layer being placed in pre-alloyed particle form to establish an intra-particle position relative to each other; and the bearing phase particles in said sacrificial layer being formed for establishing an interstitial position therein relative to the aluminum particles; sintering the tri-layer composite, and roll cladding the bonding layer face to face onto a rigid backing layer.
Claim 12
Dependent Claim
15 words
The method of claim 1 wherein said powder metal bonding layer is essentially pure aluminum.
Claim 13
Dependent Claim
15 words
The method of claim 9 wherein said powder metal bonding layer is essentially pure aluminum.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |