US3143675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor cooling in a centrifugal pump unit
Assignee: Individual
•
Filing: 1961-05-01
•
Granted: 1964-08-04
•
Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Hauenstein Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
ELECTRIC MOTOR PARTICULARLY FOR DRIVING AN IMPELLER OF A PUMP, COMPRISING A BEARING SLEEVE, A VERTICALLY ARRANGED SHAFT ROTATABLY MOUNTED IN THE SLEEVE, A STATOR HAVING A MAGNET IRON PACK AND A WINDING WITHIN THE MAGNET-IRON PACK, A ROTOR MOUNTED ON THE SHAFT, A MAGNET-IRON PACK HAVING A SHORT CIRCUITED WINDING MOUNTED IN THE ROTOR AS A PART THEREOF, THE SPACE BETWEEN THE PACK OF THE STATOR AND THE PACK OF THE ROTOR FORMING AN AIR GAP, MEANS TO DIRECT A COOLING FLUID TO THE ROTOR WITH THE LATTER FORMED AS AN UPWARDLY OPEN BELL TO RECEIVE THE COOLING FLUID, AND A RADIALLY INWARDS DIRECTED CIRCUMFERENTIAL BULGE AT THE UPPER EDGE OF THE BELL REACHING
Claim 2
Dependent Claim
115 words
ELECTRIC MOTOR PARTICULARLY FOR DRIVING AN IMPELLER OF A PUMP, COMPRISING A BEARING SLEEVE, A VERTICALLY ARRANGED SHAFT ROTATABLY MOUNTED IN THE SLEEVE, A STATOR HAVING A MAGNET IRON PACK AND A WINDING WITHIN THE MAGNET-IRON PACK, A ROTOR MOUNTED ON THE SHAFT, A MAGNET-IRON PACK HAVING A SHORT CIRCUITED WINDING MOUNTED IN THE ROTOR AS A PART THEREOF, THE SPACE BETWEEN THE PACK OF THE STATOR AND THE PACK OF THE ROTOR FORMING AN AIR GAP, MEANS TO DIRECT A COOLING FLUID TO THE ROTOR WITH THE LATTER FORMED AS AN UPWARDLY OPEN BELL TO RECEIVE THE COOLING FLUID, AND A RADIALLY INWARDS DIRECTED CIRCUMFERENTIAL BULGE AT THE UPPER EDGE OF THE BELL REACHING
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |