US3785755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air compressor system
Assignee: Rogers Machinery Co Inc
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Filing: 1971-11-22
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Granted: 1974-01-15
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Expires: 1991-11-22
Abstract
Abstract Air and oil are flowed through an oil flooded screw compressor which heats the air and oil, after which the air and oil are separated and the air is cooled to extract moisture therefrom. Then the cooled air and the hot oil are passed through a heat exchanger which heats the air to a desired temperature for use and cools the oil to a desired temperature for recirculation through the compressor.
Inventors
- 👤 W Novak
- 👤 F Thurmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:40
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/04; F04C29/042; F04C29/0007; Y; Y10; Y10S; Y10S418/00; Y10S418/01; Y10S55/00; Y10S55/17
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
The method of producing compressed air comprising: compressing moisture laden air in an oil flooded screw compressor, whereby the air and oil are heated to a predetermined temperature, separating the heated oil from the heated air, cooling the heated air to a second temperature substantially less than said predetermined temperature, removing moisture from the air so cooled, passing the air and the separated, heated oil through a heat exchanger to reheat the air and cool the oil, and returning the cooled oil to the compressor.
Claim 2
Independent Claim
85 words
The method of producing compressed air comprising: compressing moisture laden air in an oil flooded screw compressor, whereby the air and oil are heated to a predetermined temperature, separating the heated oil from the heated air, cooling the heated air to a second temperature substantially less than said predetermined temperature, removing moisture from the air so cooled, passing the air and the separated, heated oil through a heat exchanger to reheat the air and cool the oil, and returning the cooled oil to the compressor.
Claim 3
Dependent Claim
155 words
In an air compressor system, an oil flooded screw compressor having an air inlet and an air and oil outlet for compressing air whereby oil is heated, an air-oil separator having an inlet connected to the air and oil outlet and also having an oil outlet and an air outlet for separating oil from the compressed air, an aftercooler having an outlet and an inlet connected to the air outlet for cooling the compressed air, a moisture separator having an outlet and an inlet connected to the outlet of the aftercooler for removing moisture from the cooled compressed air, a reheater heat exchanger having an air passage through which cooled compressed air from the moisture separator flows and also having an oil passage in heat exchanging relationship with the air passage and receiving oil from the air-oil separator, and pump means for pumping oil from the separator, through the reheater heat exchanger, to the compressor.
Claim 4
Dependent Claim
155 words
In an air compressor system, an oil flooded screw compressor having an air inlet and an air and oil outlet for compressing air whereby oil is heated, an air-oil separator having an inlet connected to the air and oil outlet and also having an oil outlet and an air outlet for separating oil from the compressed air, an aftercooler having an outlet and an inlet connected to the air outlet for cooling the compressed air, a moisture separator having an outlet and an inlet connected to the outlet of the aftercooler for removing moisture from the cooled compressed air, a reheater heat exchanger having an air passage through which cooled compressed air from the moisture separator flows and also having an oil passage in heat exchanging relationship with the air passage and receiving oil from the air-oil separator, and pump means for pumping oil from the separator, through the reheater heat exchanger, to the compressor.
Claim 5
Dependent Claim
29 words
The air compressor system of claim 2 including an oil filter and an oil cooler positioned in series with and between the reheater heat exchanger and the pump means.
References Cited (Backward Citations)
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US2209661A
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US2323802A
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US2361393A
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US3191854A
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US3473298A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |