Patent US1914828A successfully refreshed from Google Patents.
Patent US3291349A successfully refreshed from Google Patents.
US3291349A
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Pressure sealing arrangements
Assignee: SENTREX DEV CO Ltd
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Filing: 1964-06-19
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Granted: 1966-12-13
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Expires: 1984-06-19
Abstract
No abstract record available.
Inventors
- 👤 Mckellar Duncan Campbell
- 👤 Robertshaw Graham William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:26
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/168; D; D06; D06B; D06B23/00; D06B23/14; D06B23/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PRESSURE SEAL ARRANGEMENT COMPRISING AN ORIFICE IN THE CONTAINER TO BE SEALED, A LIP FORMATION ABOUT THE PERIPHERY OF SUCH ORIFICE, A MOVING SURFACE ADAPTED TO CONTACT SAID LIP FORMATION OVER SUBSTANTIALLY THE FULL EXTENT THEREOF AND MEANS FOR PRESSING SAID LIP AND SURFACE AGAINST EACH OTHER SUFFICIENTLY TO CREATE A POSITIVE PRESSURE BETWEEN THEM, AT LEAST ONE OF THE MUTUAL CONTACTING SURFACES DEFINED BY THE MOVING SURFACE AND THE LIP FORMATION BEING RESILIENTLY DEFORMABLE THUS TO ALLOW PASSAGE THEREBETWEEN OF A WEB OR THE LIKE WHILST RETAINING AN EFFECTIVE SEAL OVER THE FULL EXTENT OF THE SAID LIP FORMATION.
Claim 2
Dependent Claim
101 words
A PRESSURE SEAL ARRANGEMENT COMPRISING AN ORIFICE IN THE CONTAINER TO BE SEALED, A LIP FORMATION ABOUT THE PERIPHERY OF SUCH ORIFICE, A MOVING SURFACE ADAPTED TO CONTACT SAID LIP FORMATION OVER SUBSTANTIALLY THE FULL EXTENT THEREOF AND MEANS FOR PRESSING SAID LIP AND SURFACE AGAINST EACH OTHER SUFFICIENTLY TO CREATE A POSITIVE PRESSURE BETWEEN THEM, AT LEAST ONE OF THE MUTUAL CONTACTING SURFACES DEFINED BY THE MOVING SURFACE AND THE LIP FORMATION BEING RESILIENTLY DEFORMABLE THUS TO ALLOW PASSAGE THEREBETWEEN OF A WEB OR THE LIKE WHILST RETAINING AN EFFECTIVE SEAL OVER THE FULL EXTENT OF THE SAID LIP FORMATION.
References Cited (Backward Citations)
US1595238A
Cited
US2796781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |