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US3341173A
Expired / Lapsed
US
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Apparatus employing gas bearings
Assignee: BOC Group Ltd
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Filing: 1966-02-25
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Granted: 1967-09-12
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Michael E Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:19
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F01; F01D; F01D25/00; F01D25/18; F01D25/22; F16C32/0651
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A HIGH SPEED EXPANSION TURBINE COMPRISING A GAS BEARING, A ROTATABLE SHAFT SUPPORTED IN SAID GAS BEARING, A ROTOR MOUNTED ON THE SHAFT, A CHAMBER INTERPOSED BETWEEN THE ROTOR AND THE BEARING, AND GUARD MEANS ADJACENT TO SAID BEARING, SAID GUARD MEANS COMPRISING TWO POCKETS SURROUNDING THE SHAFT IN AXIALLY SPACED RELATIONSHIP; A FIRST MEANS BEING PROVIDED FOR MAINTAINING IN THE POCKET PROXIMATE TO THE BEARING A GAS PRESSURE NOT EXCEEDING THE LIMITING END PRESSURE OF THE BEARING, AND A SECOND MEANS BEING PROVIDED FOR MAINTAINING IN THE POCKET PROXIMATE TO THE CHAMBER A PRESSURE SUBSTANTIALLY EQUAL TO THAT IN THE CHAMBER.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |