US3261995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for electrical machines
Assignee: Forges et Ateliers de Constructions Electriques de Jeumont SA
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Filing: 1963-03-01
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Granted: 1966-07-19
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Kohn Stephane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:46
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A COOLING SYSTEM FOR ROTATING FIELD WINDINGS OF ELECTRICAL MACHINES WITH SALIENT MAGNETIC CORES EACH BEING SURROUNDED BY SUPERPOSED TURNS OF HEAVY CONDUCTOR BARS OF SUBSTANTIALLY RECTANGULAR CROSS-SECTION, THE COMBINATION COMPRISING A DISTINCT NETWORK FORMED BY A PLURALITY OF SEPARATE TUBULAR COOLING DUCTS ELASTICALLY CONTACT SEMBLED IN GOODS THERMAL, BUT NOT IN ELECTRICAL CONTACT WITH SAID TURNS, SAID DUCTS BEING PREFABRICATED IN THE FORM OF LOOPS HAVING EACH AT LEAST WTO BRANCHES, EACH OF SAID LOOPS BEING CLOSELY ATTACHED TO SAID FIELD WINDING ALONGISE AT LEAST ONE OF SAID TURNS AND LOCATED LATERALLY WITH RESPECT TO SAID MAGNETIC CORE; INPUT AND OUTPUT HEADERS FOR LIQUID COOLANT CIRCULATING IN SAID LOOPS, AND INTERCONNECTIONS BETWEEN SAID LOOPS AND SAID HEADERS TO ESTABLISH COOLANT CIRCULATION PATHS OF LIMITED LENGTH WITH A MUTUAL REVERSAL OF THE RESPECTIVE DIRCETIONS OF COOLANT IN ALL ADJACENT BRANCHES.
Claim 2
Dependent Claim
141 words
IN A COOLING SYSTEM FOR ROTATING FIELD WINDINGS OF ELECTRICAL MACHINES WITH SALIENT MAGNETIC CORES EACH BEING SURROUNDED BY SUPERPOSED TURNS OF HEAVY CONDUCTOR BARS OF SUBSTANTIALLY RECTANGULAR CROSS-SECTION, THE COMBINATION COMPRISING A DISTINCT NETWORK FORMED BY A PLURALITY OF SEPARATE TUBULAR COOLING DUCTS ELASTICALLY CONTACT SEMBLED IN GOODS THERMAL, BUT NOT IN ELECTRICAL CONTACT WITH SAID TURNS, SAID DUCTS BEING PREFABRICATED IN THE FORM OF LOOPS HAVING EACH AT LEAST WTO BRANCHES, EACH OF SAID LOOPS BEING CLOSELY ATTACHED TO SAID FIELD WINDING ALONGISE AT LEAST ONE OF SAID TURNS AND LOCATED LATERALLY WITH RESPECT TO SAID MAGNETIC CORE; INPUT AND OUTPUT HEADERS FOR LIQUID COOLANT CIRCULATING IN SAID LOOPS, AND INTERCONNECTIONS BETWEEN SAID LOOPS AND SAID HEADERS TO ESTABLISH COOLANT CIRCULATION PATHS OF LIMITED LENGTH WITH A MUTUAL REVERSAL OF THE RESPECTIVE DIRCETIONS OF COOLANT IN ALL ADJACENT BRANCHES.
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |