Patent US3259393A successfully refreshed from Google Patents.
US3259393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lip seal for rotary shaft with patterned grooves
Assignee: Motors Liquidation Co
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Filing: 1964-09-02
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Granted: 1966-07-05
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Expires: 1984-09-02
Abstract
No abstract record available.
Inventors
- 👤 Robert L Dega
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A FLUID SEAL FOR SEALING BETWEEN TWO RELATIVELY ROTATING CONCENTRIC MEMBERS COMPRISING, AN ELASTOMERIC SEALING ANNULUS MOUNTING ON ONE OF THE MEMBERS AND HAVING A FLEXIBLE LIP PORTION ENGAGEABLE WITH A SURFACE OF THE OUTER MEMBER AND A PLURALITY OF SPACED HELICAL GROOVES IN SAID SURFACE OF THE OTHER MEMBER, SAID GROOVES BEING SPIRALED IN THE DIRECTION OF SHAFT ROTATION AS VIEWED FROM THE SEALING SIDE OF THE SEAL AND HAVING WIDTH AND DEPTH IN THE ORDER OF 0.03 TO 0.06 INCH AND 0.0001 TO 0.0004 INCH RESPECTIVELY WITH SPACING BETWEEN ADJACENT GROOVES AT LEAST 5 TIMES THR GROOVE WIDTH, SAID FLEXIBLE LIP PORTION BEING LOCALLY DEFORMED INTO EACH GROOVE WHEN THE MEMBERS ARE ROTATING RELATIVE TO EACH OTHER AND BRIDGING SAID GROOVES WHEN SAID MEMBERS ARE ROTATING RELATIVE TO EACH OTHER.
Claim 2
Dependent Claim
132 words
A FLUID SEAL FOR SEALING BETWEEN TWO RELATIVELY ROTATING CONCENTRIC MEMBERS COMPRISING, AN ELASTOMERIC SEALING ANNULUS MOUNTING ON ONE OF THE MEMBERS AND HAVING A FLEXIBLE LIP PORTION ENGAGEABLE WITH A SURFACE OF THE OUTER MEMBER AND A PLURALITY OF SPACED HELICAL GROOVES IN SAID SURFACE OF THE OTHER MEMBER, SAID GROOVES BEING SPIRALED IN THE DIRECTION OF SHAFT ROTATION AS VIEWED FROM THE SEALING SIDE OF THE SEAL AND HAVING WIDTH AND DEPTH IN THE ORDER OF 0.03 TO 0.06 INCH AND 0.0001 TO 0.0004 INCH RESPECTIVELY WITH SPACING BETWEEN ADJACENT GROOVES AT LEAST 5 TIMES THR GROOVE WIDTH, SAID FLEXIBLE LIP PORTION BEING LOCALLY DEFORMED INTO EACH GROOVE WHEN THE MEMBERS ARE ROTATING RELATIVE TO EACH OTHER AND BRIDGING SAID GROOVES WHEN SAID MEMBERS ARE ROTATING RELATIVE TO EACH OTHER.
References Cited (Backward Citations)
US2860896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |