Patent US4215464A successfully refreshed from Google Patents.
Patent USRE28094E successfully refreshed from Google Patents.
USRE28094E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing arrangement for electric motors
Assignee: Centrilift Hughes Inc
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Filing: 1973-05-21
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Granted: 1974-07-30
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Expires: 1993-05-21
Abstract
Abstract AN ELONGATED ELECTRIC MOTOR HAVING A STATOR COMPRISING A PLURALITY OF MAGNETIC LAMINATIONS. A ROTOR INCLUDING A PLURALITY OF SEGMENTS AND A SUPPORTING SHAFT DISPOSED WITHIN THE STATOR. THE ROTOR IS SUPPORTED BY A PLURALITY OF SPACED APART BEARING ASSEMBLIES WHICH INCLUDE A STATIONARY JOURNAL SUPPORTED BY THE STATOR AND A SLEEVE WHICH ROTATES WITH THE SHAFT. THE JOURNAL IS MADE OF A NON-MAGNETIC MATERIAL HAVING A RESISTIVITY OF AT LEAST 100 MICROHMS/CM.3 WHEN MEASURED AT 20 DEGREES CENTIGRADE.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:02
CPC Classifications
F; F16; F16C; F16C37/00; F16C37/002; F16C17/00; H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; F16C2380/00; F16C2380/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |