Patent US3075781A successfully refreshed from Google Patents.
US3075781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing seal
Assignee: Hughes Tool Co
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Filing: 1958-02-10
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Granted: 1963-01-29
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Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Gerald O Atkinson
- 👤 Jr William H Cline
- 👤 Robert A Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:55
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A MACHINE HAVING A SUPPORT MEMBER, A SHAFT EXTENDING TRANSVERSELY THEREOF, AND A RELATIVELY ROTATABLE MEMBER MOUNTED ON SUCH SHAFT, THERE BEING OPPOSED, GENERALLY RADIALLY EXTENDING ANNULAR SURFACES ON SUCH MEMBERS, AN ANNULAR SEAL RING RADIALLY FLOATINGLY SURROUNDING SAID SHAFT AND GENERALLY COAXIAL THEREWITH, SAID SEAL RING IN RELAXED POSITION HAVING THE GENERAL FORM OF A FRUSTO-CONICAL SHELL HAVING A WALL OF ELONGATED LENGTH IN COMPARISON WITH BOTH ITS THICKNESS AND ITS AXIAL HEIGHT AND BEING AXIALLY ELASTICALLY FLATTENABLE TO REDUCE SUCH HEIGHT, SAID SEAL RING HAVING A PAIR OF AXIALLY FACING, RADIALLY SPACED ANNULAR SURFACES AT ITS INNER AND OUTER PERIPHERAL PORTIONS, SAID SURFACES FACING IN OPPOSITE DIRECTIONS AND EACH IN SLIDING AND SEALING ENGAGEMENT WITH ONE OF THE ANNULAR SURFACES OF SAID MEMBERS, SUCH ENGAGEMENT RESULTING FROM A PARTIAL FLATTENING OF SAID SEAL RING BETWEEN AND BY THE ANNULAR SURFACES OF SAID MEMBERS.
Claim 2
Dependent Claim
146 words
IN A MACHINE HAVING A SUPPORT MEMBER, A SHAFT EXTENDING TRANSVERSELY THEREOF, AND A RELATIVELY ROTATABLE MEMBER MOUNTED ON SUCH SHAFT, THERE BEING OPPOSED, GENERALLY RADIALLY EXTENDING ANNULAR SURFACES ON SUCH MEMBERS, AN ANNULAR SEAL RING RADIALLY FLOATINGLY SURROUNDING SAID SHAFT AND GENERALLY COAXIAL THEREWITH, SAID SEAL RING IN RELAXED POSITION HAVING THE GENERAL FORM OF A FRUSTO-CONICAL SHELL HAVING A WALL OF ELONGATED LENGTH IN COMPARISON WITH BOTH ITS THICKNESS AND ITS AXIAL HEIGHT AND BEING AXIALLY ELASTICALLY FLATTENABLE TO REDUCE SUCH HEIGHT, SAID SEAL RING HAVING A PAIR OF AXIALLY FACING, RADIALLY SPACED ANNULAR SURFACES AT ITS INNER AND OUTER PERIPHERAL PORTIONS, SAID SURFACES FACING IN OPPOSITE DIRECTIONS AND EACH IN SLIDING AND SEALING ENGAGEMENT WITH ONE OF THE ANNULAR SURFACES OF SAID MEMBERS, SUCH ENGAGEMENT RESULTING FROM A PARTIAL FLATTENING OF SAID SEAL RING BETWEEN AND BY THE ANNULAR SURFACES OF SAID MEMBERS.
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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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |