US3317221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joints
Assignee: Birwelco Ltd
•
Filing: 1964-08-25
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Granted: 1967-05-02
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Brown Anthony Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:27
CPC Classifications
F; F16; F16L; F16L39/00; F16L39/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A PIPE JOINT BETWEEN TWO PIPE ASSEMBLIES, EACH ASSEMBLY COMPRISING AN OUTER PIPE AND AN INNER PIPE MOUNTED WITHIN THE OUTER PIPE TO LEAVE AN ANNULAR SPACE BETWEEN THE PIPES, THE JOINT COMPRISING A SLEEVE MEMBER WHOSE BORE HAS INTERNALLY THREADED END PORTIONS OF OPPOSITE HAND AND WHICH RECEIVES COMPLEMENTARY THREADED END PORTIONS OF SAID INNER PIPES; A RING SEAL IN SAID BORE INTERPOSED BETWEEN, AND IN SEALING ENGAGEMENT WITH, THE ENDS OF SAID INNER PIPES; EXTERNAL FLANGES ON ADJACENT ENDS OF THE OUTER PIPE; AN EXTERNAL FLANGE ON THE SLEEVE MEMBER INTERPOSED BETWEEN SAID OUTER PIPE FLANGES AND HAVING FORMATIONS ON THE OUTER PERIPHERY THEREOF FOR ENGAGEMENT BY A SPANNER; SEALING GASKETS INTERPOSED BETWEEN THE FLANGE ON THE SLEEVE MEMBER AND THE FLANGES ON THE OUTER PIPES; A RING OF BOLTS PASSING THROUGH AND CONNECTING THE FLANGES ON THE OUTER PIPES TO DRAW THEM TOGETHER AND TO COMPRESS THE SEALING GASKETS, SAID FLANGE ON THE SLEEVE MEMBER LYING WHOLLY WITHIN SAID RING, AND PASSAGES IN THE FLANGE OF THE SLEEVE MEMBER TO PLACE THE ANNULAR SPACES OF THE TWO PIPE ASSEMBLIES IN COMMUNICATION.
Claim 2
Dependent Claim
184 words
A PIPE JOINT BETWEEN TWO PIPE ASSEMBLIES, EACH ASSEMBLY COMPRISING AN OUTER PIPE AND AN INNER PIPE MOUNTED WITHIN THE OUTER PIPE TO LEAVE AN ANNULAR SPACE BETWEEN THE PIPES, THE JOINT COMPRISING A SLEEVE MEMBER WHOSE BORE HAS INTERNALLY THREADED END PORTIONS OF OPPOSITE HAND AND WHICH RECEIVES COMPLEMENTARY THREADED END PORTIONS OF SAID INNER PIPES; A RING SEAL IN SAID BORE INTERPOSED BETWEEN, AND IN SEALING ENGAGEMENT WITH, THE ENDS OF SAID INNER PIPES; EXTERNAL FLANGES ON ADJACENT ENDS OF THE OUTER PIPE; AN EXTERNAL FLANGE ON THE SLEEVE MEMBER INTERPOSED BETWEEN SAID OUTER PIPE FLANGES AND HAVING FORMATIONS ON THE OUTER PERIPHERY THEREOF FOR ENGAGEMENT BY A SPANNER; SEALING GASKETS INTERPOSED BETWEEN THE FLANGE ON THE SLEEVE MEMBER AND THE FLANGES ON THE OUTER PIPES; A RING OF BOLTS PASSING THROUGH AND CONNECTING THE FLANGES ON THE OUTER PIPES TO DRAW THEM TOGETHER AND TO COMPRESS THE SEALING GASKETS, SAID FLANGE ON THE SLEEVE MEMBER LYING WHOLLY WITHIN SAID RING, AND PASSAGES IN THE FLANGE OF THE SLEEVE MEMBER TO PLACE THE ANNULAR SPACES OF THE TWO PIPE ASSEMBLIES IN COMMUNICATION.
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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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |