US3838581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator apparatus including motor cooling means
Assignee: Carrier Corp
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Filing: 1973-10-29
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Granted: 1974-10-01
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Expires: 1993-10-29
Abstract
Abstract The open drive motor for a refrigeration apparatus is mounted in a hermetic casing containing a quantity of a mixture consisting of a refrigerant and a lubricating oil. A passage extends from the upper portion of the casing to an auxiliary condenser, and a second passage returns condensed mixture to the motor casing. The auxiliary condenser is cooled by a metered flow of refrigerant from the condenser of the apparatus. The flow is metered to supply the condensed mixture in sufficient quantity to effectively cool the motor during continuous operation of the motor at full load.
Inventors
- 👤 J Endress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:32
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B31/00; F25B31/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
24 words
Apparatus as set forth in claim 1 wherein the mixture in said motor casing consists of 50 percent refrigerant and 50 percent lubricating oil.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |