US3799632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearings for railway vehicles
Assignee: VANDORVELL PROD Ltd
•
Filing: 1972-09-05
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Granted: 1974-03-26
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Expires: 1992-09-05
Abstract
Abstract A railway bearing consisting of an aluminium alloy bearing block having a part-cylindrical recess in which two flexible bearing liners are seated. The liners have pre-formed bearing surfaces and are pressed against the surface of the recess to ensure good heat transfer from the liners to the block.
Inventors
- 👤 J Hill
- 👤 R Walmsley
- 👤 D Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:07
CPC Classifications
B; B61; B61F; B61F15/00; B61F15/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A bearing for a railway vehicle comprising a bearing block having a part-cylindrical recess and a bearing liner forced into engagement with the surface of the recess by at least one key engaging an axially extending edge of the liner, characterized in that the block is formed from an aluminium silicon alloy of thermal conductivity of at least 0.23 (c.g.s. units) and in that the liner has a preformed bearing surface to receive a railway vehicle axle.
Claim 2
Dependent Claim
77 words
A bearing for a railway vehicle comprising a bearing block having a part-cylindrical recess and a bearing liner forced into engagement with the surface of the recess by at least one key engaging an axially extending edge of the liner, characterized in that the block is formed from an aluminium silicon alloy of thermal conductivity of at least 0.23 (c.g.s. units) and in that the liner has a preformed bearing surface to receive a railway vehicle axle.
Claim 3
Dependent Claim
20 words
A bearing as claimed in claim 1 wherein the aluminium-silicon alloy contains 7.5 to 13 percent by weight of silicon.
Claim 4
Dependent Claim
31 words
A bearing as claimed in claim 2 wherein the composition of the aluminium-silicon alloy is 12 percent silicon, 1 percent copper; 1 percent nickel; 1 percent manganese and the remainder aluminium.
Claim 5
Dependent Claim
21 words
A bearing as claimed in claim 1 wherein the bearing liner comprises a steel back having a coating of bearing material.
Claim 6
Dependent Claim
13 words
A bearing as claimed in claim 4 wherein the bearing material is babbit.
Claim 7
Dependent Claim
26 words
A bearing as claimed in claim 1 wherein the bearing liner has out-turned flanges at the axial ends thereof which abut side faces of the block.
Claim 8
Dependent Claim
48 words
A bearing as claimed in claim 1 wherein the bearing liner has out-turned flanges at the axial ends thereof which abut side faces of the block and the bearing liner comprises two parts located end to end in the recess with a slight gap between adjacent ends thereof.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |