US3235275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing ring
Assignee: Cooper Bessemer Corp
•
Filing: 1963-03-21
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Granted: 1966-02-15
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:56
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PACKING RING COMPRISING A PLURALITY OF GENERALLY ARCUATELY SHAPED SECTIONS WHICH WHEN ASSEMBLED END TO END DEFINE RADIALLY INNER AND OUTER CYLINDRICAL SURFACES AND ANNULAR SIDE SURFACES ONE OF WHICH IS SUBJECTED TO PRESSURE AND THE OTHER OF WHICH IS ADAPTED TO BE SUPPORTED BY A BACKUP STRUCTURE, THE ENDS OF SAID SECTIONS HAVING TANGENTIAL SEALING SURFACES FOR SLIDING ABUTMENT WITH EACH OTHER, ONE END OF SAID TANGENTIAL SURFACES TERMINATING ADJACENT SAID INNER CYLINDRICAL SURFACE IN A MANNER PERMITTING REDUCTION OF THE DIAMETER OF SAID CYLINDRICAL SURFACES, EACH OF SAID ADJACENT SECTIONS HAVING A GENERALLY RADIALLY EXTENDING GROOVE IN THE SIDE THEREOF SUBJECTED TO PRESSURE WHICH WHEN SAID SECTIONS ARE ASSEMBLED FORM A SINGLE GROOVE AREA WHICH EXTENDS ON EITHER SIDE OF SAID ONE END OF SAID TANGENTIAL SEALING SURFACES, SAID GROOVED AREAS BEING OF UNIFORM PREDETERMINED DEPTH, A
Claim 2
Dependent Claim
140 words
A PACKING RING COMPRISING A PLURALITY OF GENERALLY ARCUATELY SHAPED SECTIONS WHICH WHEN ASSEMBLED END TO END DEFINE RADIALLY INNER AND OUTER CYLINDRICAL SURFACES AND ANNULAR SIDE SURFACES ONE OF WHICH IS SUBJECTED TO PRESSURE AND THE OTHER OF WHICH IS ADAPTED TO BE SUPPORTED BY A BACKUP STRUCTURE, THE ENDS OF SAID SECTIONS HAVING TANGENTIAL SEALING SURFACES FOR SLIDING ABUTMENT WITH EACH OTHER, ONE END OF SAID TANGENTIAL SURFACES TERMINATING ADJACENT SAID INNER CYLINDRICAL SURFACE IN A MANNER PERMITTING REDUCTION OF THE DIAMETER OF SAID CYLINDRICAL SURFACES, EACH OF SAID ADJACENT SECTIONS HAVING A GENERALLY RADIALLY EXTENDING GROOVE IN THE SIDE THEREOF SUBJECTED TO PRESSURE WHICH WHEN SAID SECTIONS ARE ASSEMBLED FORM A SINGLE GROOVE AREA WHICH EXTENDS ON EITHER SIDE OF SAID ONE END OF SAID TANGENTIAL SEALING SURFACES, SAID GROOVED AREAS BEING OF UNIFORM PREDETERMINED DEPTH, A
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |