US3090627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tandem seal
Assignee: Crane Packing Co
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Filing: 1959-12-21
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Granted: 1963-05-21
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Tankus Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
A ROTARY MECHANICAL SEAL FOR RELATIVELY ROTATABLE MEMBERS, SAID SEAL INCLUDING A SEAL SEAT ON ONE MEMBER, AN AXIALLY MOVABLE SEALING WASHER MEANS ENCIRCLING THE OTHER MEMBER, A RETAINER FIXED TO THE SAID OTHER MEMBER,, SAID SEALING WASHER MEANS HAVING A RECESS THEREIN OPENING UPON THE OTHER MEMBER, A REACTION RING SUBSTANTIALLY CLOSING OFF THE RECESS, A RADIALLY DISTORTABLE SEALING RING DISPOSED IN THE RECESS AND PROVIDING A SEAL BETWEEN THE SEALING WASHER MEANS AND THE SAID OTHER MEMBER, A SPREADER RING ADJACENT THE RADIALLY DISTORTABLE RING AND ADAPTED TO DISTORT SAID DISTORTABLE RING UPON THE APPLICATION OF AXIAL PRESSURE TO THE SPREADER RING, SPRING MEANS COMPRESSED BETWEEN THE REACTION RING AND THE SPREADER RING TO APPLY AXIAL PRESSURE TO SAID SPREADER RING, SAID REACTION RING HAVING A RECESS THEREIN OPENING UPON THE SAID OTHER MEMBER, A RADIALLY DISTORTABLE SEALING RING DISPOSED IN THE RECESS IN THE REACTION RING AND PROVIDING A SEAL BETWEEN THE REACTION RING AND THE SAID OTHER MEMBER, A SECOND SPREADER RING ADJACENT THE LAST MENTIONED RADIALLY DISTORTABLE SEALING RING AND ADAPTED TO DISTORT SAID DISTORTABLE RING UPON THE APPLICATION OF AXIAL PRESSURE TO THE SECOND SPREADER RING, AND SPRING MEANS COMPRESSED BETWEEN THE RETAINER FIXED TO THE SAID OTHER MEMBER AND THE SECOND SPREADER RING TO APPLY AXIAL PRESSURE TO SAID SECOND SPREADER RING.
Claim 2
Dependent Claim
219 words
A ROTARY MECHANICAL SEAL FOR RELATIVELY ROTATABLE MEMBERS, SAID SEAL INCLUDING A SEAL SEAT ON ONE MEMBER, AN AXIALLY MOVABLE SEALING WASHER MEANS ENCIRCLING THE OTHER MEMBER, A RETAINER FIXED TO THE SAID OTHER MEMBER,, SAID SEALING WASHER MEANS HAVING A RECESS THEREIN OPENING UPON THE OTHER MEMBER, A REACTION RING SUBSTANTIALLY CLOSING OFF THE RECESS, A RADIALLY DISTORTABLE SEALING RING DISPOSED IN THE RECESS AND PROVIDING A SEAL BETWEEN THE SEALING WASHER MEANS AND THE SAID OTHER MEMBER, A SPREADER RING ADJACENT THE RADIALLY DISTORTABLE RING AND ADAPTED TO DISTORT SAID DISTORTABLE RING UPON THE APPLICATION OF AXIAL PRESSURE TO THE SPREADER RING, SPRING MEANS COMPRESSED BETWEEN THE REACTION RING AND THE SPREADER RING TO APPLY AXIAL PRESSURE TO SAID SPREADER RING, SAID REACTION RING HAVING A RECESS THEREIN OPENING UPON THE SAID OTHER MEMBER, A RADIALLY DISTORTABLE SEALING RING DISPOSED IN THE RECESS IN THE REACTION RING AND PROVIDING A SEAL BETWEEN THE REACTION RING AND THE SAID OTHER MEMBER, A SECOND SPREADER RING ADJACENT THE LAST MENTIONED RADIALLY DISTORTABLE SEALING RING AND ADAPTED TO DISTORT SAID DISTORTABLE RING UPON THE APPLICATION OF AXIAL PRESSURE TO THE SECOND SPREADER RING, AND SPRING MEANS COMPRESSED BETWEEN THE RETAINER FIXED TO THE SAID OTHER MEMBER AND THE SECOND SPREADER RING TO APPLY AXIAL PRESSURE TO SAID SECOND SPREADER RING.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |