Patent US3618337A successfully refreshed from Google Patents.
US3618337A
Expired / Lapsed
US
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Hermetic refrigeration compressor
Assignee: Carrier Corp
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Filing: 1970-06-22
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Granted: 1971-11-09
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Expires: 1990-06-22
Abstract
Abstract THE LOWER END OF THE CASING OF THE VERTICALLY MOUNTED HERMETIC COMPRESSOR UNIT IS FORMED WITH AN OIL SUMP TO WHICH LIQUID REFRIGERANT IS SUPPLIED. THE LIQUID OIL-REFRIGERANT MIXTURE IS ELEVATED FROM THE SUMP BY A LIFT TUBE FIXED TO AND DEPENDING FROM THE MOTOR ROTOR. DURING OPERATION OF THE MOTOR, A ROTATIONAL VORTEX IS FORMED IN THE TUBE AND THE LIQUID MIXTURE IS PASSED UPWARDLY THROUGH AXIALLY EXTENDING PASSAGES IN THE ROTOR AND IS DISPENSED ON THE UPPER AND LOWER END TURNS OF THE STATOR WINDINGS. SUCTION IS APPLIED TO THE CASING ABOVE THE MOTOR FOR REMOVAL OF REFRIGERANT VAPOR.
Inventors
- 👤 Gordon L Mount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:55
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19; H02K9/20; F; F04; F04D; F04D1/00; F04D1/14; F25; F25B; F25B31/00; F25B31/002; F25B31/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |