US3071384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing structure for rotary mechanism
Assignee: Alsacienne de Constructions Mecaniques SA
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Filing: 1961-04-04
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Granted: 1963-01-01
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Expires: 1981-04-04
Abstract
No abstract record available.
Inventors
- 👤 Friberg Jean Marie Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/143; F16J15/16; F16J15/40; F16J15/406; Y; Y10; Y10S; Y10S277/00; Y10S277/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN ROTARY MECHANISM INCLUDING A STATOR AND ROTOR DEFINING AN AXIALLY ELONGATED ANNULAR SPACE BETWEEN ADJACENT SURFACES THEREOF, THE COMBINATION COMPRISING: SUCTION MEANS CONNECTED WITH A FIRST ZONE OF SAID SPACE FOR MAINTAINING A LOW FIRST PRESSURE IN SAID FIRST ZONE; MEANS DELIVERING A RELATIVELY VALUABLE GAS INTO A SECOND ZONE OF SAID SPACE AXIALLY DISPLACED FROM THE FIRST ZONE AT A SECOND PRESSURE SUBSTANTIALLY HIGHER THAN SAID FIRST PRESSURE; FURTHER SUCTION MEANS CONNECTED WITH A THIRD ZONE OF SAID SPACE AXIALLY DISPLACED FROM THE SECOND ZONE AWAY FROM THE FIRST ZONE FOR MAINTAINING IN SAID THIRD ZONE A THIRD PRESSURE SOMEWHAT LOWER THAN SAID SECOND PRESSURE, AND MEANS DELIVERING A LOW-VALUED GAS INTO SAID SPACE IN A FOURTH ZONE THEREOF AXIALLY DISPLACED FROM THE THIRD ZONE AWAY FROM THE FIRST AND SECOND ZONES AT A FOURTH PRESSURE SUBSTANTIALLY HIGHER THAN SAID SECOND PRESSURE.
Claim 2
Dependent Claim
144 words
IN ROTARY MECHANISM INCLUDING A STATOR AND ROTOR DEFINING AN AXIALLY ELONGATED ANNULAR SPACE BETWEEN ADJACENT SURFACES THEREOF, THE COMBINATION COMPRISING: SUCTION MEANS CONNECTED WITH A FIRST ZONE OF SAID SPACE FOR MAINTAINING A LOW FIRST PRESSURE IN SAID FIRST ZONE; MEANS DELIVERING A RELATIVELY VALUABLE GAS INTO A SECOND ZONE OF SAID SPACE AXIALLY DISPLACED FROM THE FIRST ZONE AT A SECOND PRESSURE SUBSTANTIALLY HIGHER THAN SAID FIRST PRESSURE; FURTHER SUCTION MEANS CONNECTED WITH A THIRD ZONE OF SAID SPACE AXIALLY DISPLACED FROM THE SECOND ZONE AWAY FROM THE FIRST ZONE FOR MAINTAINING IN SAID THIRD ZONE A THIRD PRESSURE SOMEWHAT LOWER THAN SAID SECOND PRESSURE, AND MEANS DELIVERING A LOW-VALUED GAS INTO SAID SPACE IN A FOURTH ZONE THEREOF AXIALLY DISPLACED FROM THE THIRD ZONE AWAY FROM THE FIRST AND SECOND ZONES AT A FOURTH PRESSURE SUBSTANTIALLY HIGHER THAN SAID SECOND PRESSURE.
References Cited (Backward Citations)
US2721747A
Cited
US2903280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |