Patent US3645112A successfully refreshed from Google Patents.
US3645112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant cooling system for electric motor
Assignee: Carrier Corp
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Filing: 1970-07-13
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Granted: 1972-02-29
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Expires: 1990-07-13
Abstract
Abstract The low- and high-pressure sides of a refrigerant apparatus are connected to the casing of a hermetically enclosed electric motor. Refrigerant control means is provided to maintain a supply of liquid refrigerant in the casing at a predetermined level. A pump functions to dispense the liquid refrigerant from the supply in the motor casing on the components of the motor to cool the same.
Inventors
- 👤 Gordon L Mount
- 👤 James W Endress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:44
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19; H02K9/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
121 words
A liquid refrigerant cooling system for an electric motor comprising a hermetically sealed casing containing the motor components including a stator having windings and a rotor, the axis of said rotor being disposed horizontally, refrigeration apparatus operable when energized to supply liquid refrigerant to said casing and extract refrigerant vapor therefrom, passage means extending from said apparatus to said casing for the transfer of the liquid refrigerant thereto, refrigerant control means operable to maintain a supply of liquid refrigerant in said motor casing in contact with a portion of the windings of said stator and at a level below and in close proximity to said rotor, and pump means operable to dispense liquid refrigerant from said supply onto said motor components.
Claim 2
Dependent Claim
121 words
A liquid refrigerant cooling system for an electric motor comprising a hermetically sealed casing containing the motor components including a stator having windings and a rotor, the axis of said rotor being disposed horizontally, refrigeration apparatus operable when energized to supply liquid refrigerant to said casing and extract refrigerant vapor therefrom, passage means extending from said apparatus to said casing for the transfer of the liquid refrigerant thereto, refrigerant control means operable to maintain a supply of liquid refrigerant in said motor casing in contact with a portion of the windings of said stator and at a level below and in close proximity to said rotor, and pump means operable to dispense liquid refrigerant from said supply onto said motor components.
Claim 3
Dependent Claim
61 words
A system as set forth in claim 1 wherein said compressor includes capacity control mechanism operable to vary the output capacity of said compressor according to the temperature of said liquid refrigerant supply in said motor casing, and a temperature sensor disposed to sense the temperature of said supply, said temperature sensor being operatively connected to said compressor capacity control mechanism.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |