Patent US3128104A successfully refreshed from Google Patents.
US3128104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic labyrinth-type seal for shafts
Assignee: Individual
•
Filing: 1961-12-15
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Granted: 1964-04-07
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Expires: 1981-12-15
Abstract
No abstract record available.
Inventors
- 👤 Teske Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:50
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A UNITARY SHAFT SEAL COMPRISING, IN COMBINATION, INNER AND OUTER ANNULAR HOUSING RINGS, AT LEAST ONE OF SAID RINGS HAVING A PAIR OF AXIALLY SPACED ANNULAR GROOVES THEREIN, DISC MEMBERS ASSOCIATED WITH THE OTHER OF SAID RINGS EXTENDING INTO SAID GROOVES TO FORM LONGITUDINALLY SPACED LABYRINTH SEALS, MEANS DEFINING A CHAMBER BETWEEN SAID DISC MEMBERS, A PERMANENT RING MAGNET HAVING A RADIAL MIRROR GROUND SURFACE IN SAID CHAMBER, A COOPERATING MAGNETIC RADIAL MIRROR GROUND SURFACE ASSOCIATED WITH SAID OTHER RING SLIDABLY ABUTTING THE RADIAL MIRROR GROUND SURFACE OF SAID RING MAGNET TO FORM A SEAL, AND A FLEXIBLE CORRUGATED MEMBRANE IN SAID CHAMBER SEALINGLY CONNECTED BETWEEN SAID RING MAGNET AND SAID ONE HOUSING RING.
Claim 2
Dependent Claim
114 words
A UNITARY SHAFT SEAL COMPRISING, IN COMBINATION, INNER AND OUTER ANNULAR HOUSING RINGS, AT LEAST ONE OF SAID RINGS HAVING A PAIR OF AXIALLY SPACED ANNULAR GROOVES THEREIN, DISC MEMBERS ASSOCIATED WITH THE OTHER OF SAID RINGS EXTENDING INTO SAID GROOVES TO FORM LONGITUDINALLY SPACED LABYRINTH SEALS, MEANS DEFINING A CHAMBER BETWEEN SAID DISC MEMBERS, A PERMANENT RING MAGNET HAVING A RADIAL MIRROR GROUND SURFACE IN SAID CHAMBER, A COOPERATING MAGNETIC RADIAL MIRROR GROUND SURFACE ASSOCIATED WITH SAID OTHER RING SLIDABLY ABUTTING THE RADIAL MIRROR GROUND SURFACE OF SAID RING MAGNET TO FORM A SEAL, AND A FLEXIBLE CORRUGATED MEMBRANE IN SAID CHAMBER SEALINGLY CONNECTED BETWEEN SAID RING MAGNET AND SAID ONE HOUSING RING.
References Cited (Backward Citations)
US2554488A
Cited
GB631981A
Cited
US2685463A
Cited
US2843403A
Cited
US3050319A
Cited
US2883212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |