US3251601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Labyrinth seal
Assignee: Motors Liquidation Co
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Filing: 1963-03-20
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Granted: 1966-05-17
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Expires: 1983-03-20
Abstract
No abstract record available.
Inventors
- 👤 Robert R Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:01
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4472; F01; F01D; F01D11/00; F01D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A LABYRINTH SEAL STRUCTURE COMPRISING, IN COMBINATION, A STATOR MEMBER, A ROTOR MEMBER DISPOSED ADJACENT THE STATOR MEMBER AND MOUNTED FOR RAPID ROTATION, THE SAID CHAMBERS BEING MUTUALLY SPACED TO PROVIDE RUNNING CLEARANCE FOR RELATIVE ROTATION, THE MEMBERS DEFINING BETWEEN THEM A PASSAGE FROM A FIRST SPACE CONTAINING A GASEOUS FLUID UNDER A FIRST PRESSURE TO A SECOND SPACE CONTAINING A FLUID UNDER A SECOND AND LOWER PRESSURE, THE PASSAGE BEING CONFIGURED TO PROVIDE IN SUCCESSION FROM THE FIRST TO THE SECOND SPACE AN ANNULAR ORIFICE HAVING SMALL CLEARANCE BETWEEN THE ROTOR AND STATOR AND AN ANNULAR CHAMBER HAVING CLEARANCE BETWEEN THE ROTOR AND STATOR LARGE RELATIVE TO THAT OF THE ORIFICE, THE CHAMBER BEING DEMARKED FROM THE ORIFICE BY A SHOULDER ON THE ROTOR TRANSVERSE TO THE DIRECTION OF FLOW THROUGH THE ORIFICE, THE ROTOR HAVING VANES EXTENDING FROM THE SAID SHOULDER INTO THE CHAMBER ADAPTED TO PUMP THE SAID GASEOUS FLUID IN THE CHAMBER ACROSS THE EXIT OF THE SAID ORIFICE TRANSVERSELY TO THE DIRECTION OF FLOW THROUGH THE ORIFICE AND THUS PROVIDE A DYNAMIC RESTRICTION OF THE SAID ORIFICE BELOW THE GEOMETRIC CLEARANCE THEREIN BETWEEN THE MEMBERS.
Claim 2
Dependent Claim
190 words
A LABYRINTH SEAL STRUCTURE COMPRISING, IN COMBINATION, A STATOR MEMBER, A ROTOR MEMBER DISPOSED ADJACENT THE STATOR MEMBER AND MOUNTED FOR RAPID ROTATION, THE SAID CHAMBERS BEING MUTUALLY SPACED TO PROVIDE RUNNING CLEARANCE FOR RELATIVE ROTATION, THE MEMBERS DEFINING BETWEEN THEM A PASSAGE FROM A FIRST SPACE CONTAINING A GASEOUS FLUID UNDER A FIRST PRESSURE TO A SECOND SPACE CONTAINING A FLUID UNDER A SECOND AND LOWER PRESSURE, THE PASSAGE BEING CONFIGURED TO PROVIDE IN SUCCESSION FROM THE FIRST TO THE SECOND SPACE AN ANNULAR ORIFICE HAVING SMALL CLEARANCE BETWEEN THE ROTOR AND STATOR AND AN ANNULAR CHAMBER HAVING CLEARANCE BETWEEN THE ROTOR AND STATOR LARGE RELATIVE TO THAT OF THE ORIFICE, THE CHAMBER BEING DEMARKED FROM THE ORIFICE BY A SHOULDER ON THE ROTOR TRANSVERSE TO THE DIRECTION OF FLOW THROUGH THE ORIFICE, THE ROTOR HAVING VANES EXTENDING FROM THE SAID SHOULDER INTO THE CHAMBER ADAPTED TO PUMP THE SAID GASEOUS FLUID IN THE CHAMBER ACROSS THE EXIT OF THE SAID ORIFICE TRANSVERSELY TO THE DIRECTION OF FLOW THROUGH THE ORIFICE AND THUS PROVIDE A DYNAMIC RESTRICTION OF THE SAID ORIFICE BELOW THE GEOMETRIC CLEARANCE THEREIN BETWEEN THE MEMBERS.
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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |