US3254898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple lip seal
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1963-06-21
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Granted: 1966-06-07
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Edward J Herbenar
- 👤 Norman A Stenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:35
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A SEAL FOR ROTARY SHAFTS AND THE LIKE COMPRISING, AN OUTER SEALING RING OF A PLASTIC MATERIAL, AN INNER SEALING RING OF A RESILIENT MATERIAL, A RIGID OUTER ANNULAR CASING HAVING A RADIAL FLANGE PORTION EMBRACING A RIM PORTION OF SAID OUTER SEALING RING AND A LATERAL RIM PORTION EXTENDING FROM SAID RADIAL FLANGE PORTION AND TERMINATING IN A CRIMPED PORTION, SAID LATERAL PORTION BEING SIZED TO RECEIVE THE OUTER SEALING RING AND INNER SEALING RING BETWEEN SAID RADIAL FLANGE AND SAID CRIMPED PORTION, A RIGID INNER CASING BONDED TO SAID INNER SEALING RING AND EMBRACING SAID RIM PORTION OF SAID OUTER CASING AND HAVING A FLANGE PORTION COOPERATING WITH SAID RADIAL FLANGE OF SAID OUTER CASING TO RIGIDLY SECURE SAID RIM PORTION OF SAID OUTER SEALING RING, SAID INNER SEALING RING HAVING A LIP PORTION SEALINGLY ENGAGING SAID SHAFT,
Claim 2
Dependent Claim
140 words
A SEAL FOR ROTARY SHAFTS AND THE LIKE COMPRISING, AN OUTER SEALING RING OF A PLASTIC MATERIAL, AN INNER SEALING RING OF A RESILIENT MATERIAL, A RIGID OUTER ANNULAR CASING HAVING A RADIAL FLANGE PORTION EMBRACING A RIM PORTION OF SAID OUTER SEALING RING AND A LATERAL RIM PORTION EXTENDING FROM SAID RADIAL FLANGE PORTION AND TERMINATING IN A CRIMPED PORTION, SAID LATERAL PORTION BEING SIZED TO RECEIVE THE OUTER SEALING RING AND INNER SEALING RING BETWEEN SAID RADIAL FLANGE AND SAID CRIMPED PORTION, A RIGID INNER CASING BONDED TO SAID INNER SEALING RING AND EMBRACING SAID RIM PORTION OF SAID OUTER CASING AND HAVING A FLANGE PORTION COOPERATING WITH SAID RADIAL FLANGE OF SAID OUTER CASING TO RIGIDLY SECURE SAID RIM PORTION OF SAID OUTER SEALING RING, SAID INNER SEALING RING HAVING A LIP PORTION SEALINGLY ENGAGING SAID SHAFT,
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |