US3710156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating electric machine with evaporation cooling
Assignee: Individual
•
Filing: 1970-11-30
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Granted: 1973-01-09
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Expires: 1990-11-30
Abstract
Abstract An electric rotating machine having a stator or a pole ring producing a rotating magnetic field and a rotor supported in the fluid being conveyed where said stator or pole ring is hermetically sealed in a housing which is filled with a saturated vapor of an electrically non-conducting material whose boiling point is below the highest permissible temperature of components producing electric resistance power.
Inventors
- 👤 N Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1282; H02K9/00; H02K9/22; H02K9/225
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
An electric rotatable machine having a rotor, a stator and a non-magnetic separating wall positioned between said rotor and stator; the improvement comprising having in addition a hermetically sealed housing enclosing said stator of which said separating wall forms a part, a condensate of an electrical nonconductive material in said housing where said material has a boiling point which is less than the highest permissible operating temperature to which said stator may be subjected and which is above the ambient temperature of said machine at a predetermined operational internal pressure of the housing, a vapor of said condensate substantially filling the unoccupied spaces in said housing, and means for bringing said condensate into thermal contact with heated portions of said stator to cool the same.
Claim 2
Dependent Claim
125 words
An electric rotatable machine having a rotor, a stator and a non-magnetic separating wall positioned between said rotor and stator; the improvement comprising having in addition a hermetically sealed housing enclosing said stator of which said separating wall forms a part, a condensate of an electrical nonconductive material in said housing where said material has a boiling point which is less than the highest permissible operating temperature to which said stator may be subjected and which is above the ambient temperature of said machine at a predetermined operational internal pressure of the housing, a vapor of said condensate substantially filling the unoccupied spaces in said housing, and means for bringing said condensate into thermal contact with heated portions of said stator to cool the same.
Claim 3
Dependent Claim
48 words
An electric rotatable machine according to claim 1 wherein said separating wall forms a condenser which condenses part of said vapor into said condensate and having in addition absorbent bodies for removing said condensate from said separating wall to the heated portion of said stator by capillary action.
Claim 4
Dependent Claim
23 words
An electric rotatable machine according to claim 1 wherein an absorbent body forms an electrically insulated jacket for a pole of said stator.
Claim 5
Dependent Claim
50 words
An electric rotatable machine according to claim 1 wherein said separating wall serves to cool and condense the vapor in the housing and wherein the stator has a laminated core with narrow strips therein through which the condensate may penetrate to the interior of the stator to cool the same.
Claim 6
Dependent Claim
37 words
An electric rotatable machine according to claim 1 wherein said separating wall is in heat conductive contact with ambient temperature exterior of the housing and wherein heated portions of said stator are positioned below said separating wall.
Claim 7
Dependent Claim
97 words
An electric rotatable machine having a rotor, a stator and a non-magnetic separating wall positioned betweeN said rotor and stator; the improvement comprising having in addition a hermetically sealed housing enclosing said stator of which said separating wall forms a part, a condensate of electrical non-conductive material in said housing where said material at the desired operating temperature of the separating wall is also in a vapor phase, said vapor substantially filling the unoccupied spaces in said housing, and means for bringing said condensate into thermal contact with heated portions of said stator to cool the same.
Claim 8
Dependent Claim
97 words
An electric rotatable machine having a rotor, a stator and a non-magnetic separating wall positioned betweeN said rotor and stator; the improvement comprising having in addition a hermetically sealed housing enclosing said stator of which said separating wall forms a part, a condensate of electrical non-conductive material in said housing where said material at the desired operating temperature of the separating wall is also in a vapor phase, said vapor substantially filling the unoccupied spaces in said housing, and means for bringing said condensate into thermal contact with heated portions of said stator to cool the same.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |