Patent US3222076A successfully refreshed from Google Patents.
US3222076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint packing
Assignee: Woodward Iron Co
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Filing: 1962-04-24
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Granted: 1965-12-07
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Expires: 1982-04-24
Abstract
No abstract record available.
Inventors
- 👤 Albert A Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:21
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A FLUID TIGHT PACKING DEVICE FOR INSERTION BETWEEN THE MATING SURFACES OF THE HUB AND SPIGOT ENDS OF TWO ADAJCENT PIPE SECTIONS, COMPRISING AN ANNULAR, HOLLOW RING OF DEFLATABLE AND INFLATABLE MATERIAL, THE OUTER PERIPHERAL EDGE WALL OF SAID RING BEING PROVIDED WITH A THICKENED INJECTION NEEDLE RECEIVING MEMBER OF PENETRABLE, SELFSEALING MATERIAL WHICH INTERSECTS SAID PERIPHERAL EDGE WALL AND PROJECTS SUBSTANTIALLY, BOTH INTERNALLY AND EXTERNALLY THEREOF, TO PROVIDE LATERALLY COMRESSIBLE AREAS RESPECTIVELY RESPONSIVE TO INTERNAL PRESSURE OF FILL MATERIAL INTRODUCED WITHIN SAID RING AND EXTERNAL ATMOSPHERIC PRESSURE, TO THEREBY SERVE AS A DOUBLE CHECK VALVE.
Claim 2
Dependent Claim
96 words
A FLUID TIGHT PACKING DEVICE FOR INSERTION BETWEEN THE MATING SURFACES OF THE HUB AND SPIGOT ENDS OF TWO ADAJCENT PIPE SECTIONS, COMPRISING AN ANNULAR, HOLLOW RING OF DEFLATABLE AND INFLATABLE MATERIAL, THE OUTER PERIPHERAL EDGE WALL OF SAID RING BEING PROVIDED WITH A THICKENED INJECTION NEEDLE RECEIVING MEMBER OF PENETRABLE, SELFSEALING MATERIAL WHICH INTERSECTS SAID PERIPHERAL EDGE WALL AND PROJECTS SUBSTANTIALLY, BOTH INTERNALLY AND EXTERNALLY THEREOF, TO PROVIDE LATERALLY COMRESSIBLE AREAS RESPECTIVELY RESPONSIVE TO INTERNAL PRESSURE OF FILL MATERIAL INTRODUCED WITHIN SAID RING AND EXTERNAL ATMOSPHERIC PRESSURE, TO THEREBY SERVE AS A DOUBLE CHECK VALVE.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |