US3149819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for protecting a bearing against heat
Assignee: BBC Brown Boveri AG Germany
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Filing: 1962-02-08
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Granted: 1964-09-22
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Baumann Hans
- 👤 Eggmann Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:34
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D29/057; F04D29/58; F04D29/582; F04D29/584; F04D29/5853; F04D29/053; F16; F16C; F16C37/00; F16C37/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A TURBO-MACHINE SUCH AS A TURBINE OR A COMPRESSOR WITH GAS LUBRICATED BEARINGS AND WHEREIN AT LEAST ONE OF SAID BEARINGS IS LOCATED CLOSELY TO THE BLADED ROTOR OF SAID MACHINE AND WHICH IS MOUNTED ON A HOLLOW CYLINDRICAL SHAFT EXTENDING THROUGH SAID BEARING, THE IMPROVEMENT WHEREIN A HOLLOW BUSH FOR HEAT DISTRIBUTION AND COOLING IS LOCATED WITHIN THAT PART OF SAID HOLLOW SHAFT WHICH EXTENDS THROUGH SAID BEARING, SAID HOLLOW SHAFT BEING MADE FROM STEEL AND SAID HOLLOW BUSH BEING MADE FROM A METAL HAVING A COEFFICIENT OF HEAT CONDUCTIVITY HIGHER THAN THAT OF THE STEEL, SAID HOLLOW BUSH AND HOLLOW SHAFT BEING TRAVERSED INTERIORLY THEREOF BY A GASEOUS COOLANT, AND SAID HOLLOW BUSH EXTENDING SUBSTANTIALLY FOR THE LENGTH OF SAID BEARING AND BEING IN SURFACE CONTACT WITH THE INTERIOR SURFACE OF SAID HOLLOW SHAFT THROUGHOUT ITS LENGTH.
Claim 2
Dependent Claim
140 words
IN A TURBO-MACHINE SUCH AS A TURBINE OR A COMPRESSOR WITH GAS LUBRICATED BEARINGS AND WHEREIN AT LEAST ONE OF SAID BEARINGS IS LOCATED CLOSELY TO THE BLADED ROTOR OF SAID MACHINE AND WHICH IS MOUNTED ON A HOLLOW CYLINDRICAL SHAFT EXTENDING THROUGH SAID BEARING, THE IMPROVEMENT WHEREIN A HOLLOW BUSH FOR HEAT DISTRIBUTION AND COOLING IS LOCATED WITHIN THAT PART OF SAID HOLLOW SHAFT WHICH EXTENDS THROUGH SAID BEARING, SAID HOLLOW SHAFT BEING MADE FROM STEEL AND SAID HOLLOW BUSH BEING MADE FROM A METAL HAVING A COEFFICIENT OF HEAT CONDUCTIVITY HIGHER THAN THAT OF THE STEEL, SAID HOLLOW BUSH AND HOLLOW SHAFT BEING TRAVERSED INTERIORLY THEREOF BY A GASEOUS COOLANT, AND SAID HOLLOW BUSH EXTENDING SUBSTANTIALLY FOR THE LENGTH OF SAID BEARING AND BEING IN SURFACE CONTACT WITH THE INTERIOR SURFACE OF SAID HOLLOW SHAFT THROUGHOUT ITS LENGTH.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |