Patent US3503376A successfully refreshed from Google Patents.
Patent US3299655A successfully refreshed from Google Patents.
US3299655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil lubrication system for refrigeration apparatus
Assignee: Worthington Corp
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Filing: 1965-06-01
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Granted: 1967-01-24
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Rayner
- 👤 Wilbur C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:55
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN OIL LUBRICATION SYSTEM FOR REFRIGERATION APPARATUS WHICH HAS A CENTRIFUGAL COMPRESSOR DRIVEN BY A MOTIVE MEANS, A CONDENSER, AN EXPANSION DEVICE AND AN EVAPORATOR, CONNECTED TO EACH OTHER IN AN OPERATIVE REFRIGERATION LOOP, SAID SYSTEM COMPRISING: (A) AN OIL RESERVOIR HAVING A GASEOUS PORTION AND AN OIL PORTION, (B) AN OIL PUMP IN COMMUNICATION WITH THE OIL PORTION OF THE OIL RESERVOIR FOR DELIVERING OIL LUBRICANT TO THE COMPRESSOR AND MOTIVE MEANS, (C) PRESSURE EQUALIZATION LINE MEANS CONNECTED BETWEEN THE OIL RESERVOIR, THE COMPRESSOR AND THE MOTIVE MEANS TO EQUALIZE THE PRESSURE IN THE OIL RESERVOIR, (D) OIL SEPARATION MEANS DISPOSED IN THE PRESSURE EQUALIZATION LINE MEANS TO COLLECT OIL THEREIN AND LIMIT THE FLOW OF OIL FROM THE OIL RESERVOIR TO THE COMPRESSOR, (E) A FLOW INDUCING MEANS IN COMMUNICATION WITH THE OIL SEPARATOR TO INDUCE THE FLOW OF COLLECTED OIL THEREIN FOR RETURN TO THE OIL RESERVOIR.
Claim 2
Dependent Claim
150 words
AN OIL LUBRICATION SYSTEM FOR REFRIGERATION APPARATUS WHICH HAS A CENTRIFUGAL COMPRESSOR DRIVEN BY A MOTIVE MEANS, A CONDENSER, AN EXPANSION DEVICE AND AN EVAPORATOR, CONNECTED TO EACH OTHER IN AN OPERATIVE REFRIGERATION LOOP, SAID SYSTEM COMPRISING: (A) AN OIL RESERVOIR HAVING A GASEOUS PORTION AND AN OIL PORTION, (B) AN OIL PUMP IN COMMUNICATION WITH THE OIL PORTION OF THE OIL RESERVOIR FOR DELIVERING OIL LUBRICANT TO THE COMPRESSOR AND MOTIVE MEANS, (C) PRESSURE EQUALIZATION LINE MEANS CONNECTED BETWEEN THE OIL RESERVOIR, THE COMPRESSOR AND THE MOTIVE MEANS TO EQUALIZE THE PRESSURE IN THE OIL RESERVOIR, (D) OIL SEPARATION MEANS DISPOSED IN THE PRESSURE EQUALIZATION LINE MEANS TO COLLECT OIL THEREIN AND LIMIT THE FLOW OF OIL FROM THE OIL RESERVOIR TO THE COMPRESSOR, (E) A FLOW INDUCING MEANS IN COMMUNICATION WITH THE OIL SEPARATOR TO INDUCE THE FLOW OF COLLECTED OIL THEREIN FOR RETURN TO THE OIL RESERVOIR.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |