Patent US3311291A successfully refreshed from Google Patents.
US3311291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical screw compressors
Assignee: Individual
•
Filing: 1965-09-16
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Granted: 1967-03-28
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Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Charles J Surdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:45
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A ROTARY COMPRESSOR, A HOUSING WITH A PAIR OF CYLINDRICAL INTERSECTING CHAMBERS, EACH ADAPTED RESPECTIVELY TO RECEIVE INTERMESHING HELICALLY LOBED MALE AND HELICALLY GROOVED FEMALE ROTORS COOPERATING WITH EACH OTHER AND THE HOUSING TO FORM CHEVRON SHAPED POCKETS THAT PROGRESS FROM ONE END OF THE HOUSING TO THE OTHER END DURING ROTATION OF THE ROTORS, GAS INTAKE AND DISCHARGE PORTS IN OPPOSITE END PORTIONS OF SAID HOUSING, SAID INTAKE PORT NORMALLY EXPOSING A SUBSTANTIAL PORTION OF THE INTERMESHED HELICALLY LOBED MALE AND HELICALLY GROOVED FEMALE ROTORS, THE NORMAL ROTATIONAL SPEED OF SAID ROTORS BEING SUFFICIENT TO PRODUCE A CENTRIFUGAL PRESSURE EQUIVALENT TO AT LEAST 1,000 MICRONS OF MERCURY ABOVE INLET GAS PRESSURE AND CONTRA INLET FLOW, THE IMPROVEMENT WHICH COMPRISES A DEFLECTOR ELEMENT HAVING ARCUATE WALLS EMBRACING RESPECTIVE PORTIONS OF SAID MALE AND FEMALE ROTORS AND PROVIDING A RUNNING FIT WITH SAID
Claim 2
Dependent Claim
143 words
IN A ROTARY COMPRESSOR, A HOUSING WITH A PAIR OF CYLINDRICAL INTERSECTING CHAMBERS, EACH ADAPTED RESPECTIVELY TO RECEIVE INTERMESHING HELICALLY LOBED MALE AND HELICALLY GROOVED FEMALE ROTORS COOPERATING WITH EACH OTHER AND THE HOUSING TO FORM CHEVRON SHAPED POCKETS THAT PROGRESS FROM ONE END OF THE HOUSING TO THE OTHER END DURING ROTATION OF THE ROTORS, GAS INTAKE AND DISCHARGE PORTS IN OPPOSITE END PORTIONS OF SAID HOUSING, SAID INTAKE PORT NORMALLY EXPOSING A SUBSTANTIAL PORTION OF THE INTERMESHED HELICALLY LOBED MALE AND HELICALLY GROOVED FEMALE ROTORS, THE NORMAL ROTATIONAL SPEED OF SAID ROTORS BEING SUFFICIENT TO PRODUCE A CENTRIFUGAL PRESSURE EQUIVALENT TO AT LEAST 1,000 MICRONS OF MERCURY ABOVE INLET GAS PRESSURE AND CONTRA INLET FLOW, THE IMPROVEMENT WHICH COMPRISES A DEFLECTOR ELEMENT HAVING ARCUATE WALLS EMBRACING RESPECTIVE PORTIONS OF SAID MALE AND FEMALE ROTORS AND PROVIDING A RUNNING FIT WITH SAID
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |