Patent US3349578A successfully refreshed from Google Patents.
US3349578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: Burlington Industries Inc
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Filing: 1965-08-24
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Granted: 1967-10-31
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Expires: 1985-08-24
Abstract
No abstract record available.
Inventors
- 👤 James E Greer
- 👤 William L Acree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/14; D06B23/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A SEALING DEVICE FOR PRESSURE SEALING A VESSEL FROM AN EXTERNAL ATMOSPHERE AND FOR PASSING A CONTINUOUS LENGTH OF MATERIAL INTO AND OUT OF SAID VESSEL THROUGH SAID SEALING DEVICE, COMPRISING: A HOLLOW CASING HAVING AN OPENING AT EACH END, SAID CASING BEING MOUNTED OVER AN OPENING INTO SAID VESSEL, A PLURALITY OF FLEXIBLE DIAPHRAGM MEANS INCLUDED IN SAID CASING AND SPACED FROM ONE ANOTHER ALONG THE LENGTH OF SAID SEALING DEVICE SO AS TO DEFINE A PLURALITY OF CHAMBERS IN SAID SEALING DEVICE, SAID PLURALITY OF FLEXIBLE DIAPHRAGM MEANS EACH HAVING A CENTRAL OPENING THERETHROUGH FOR ALLOWING THE PASSAGE OF CONTINUOUS LENGTH MATERIAL THROUGH THE PLURALITY OF DIAPHRAGM MEANS AND MEANS FOR INTRODUCING A FLUID INTO AT LEAST ONE OF SAID PLURALITY OF CHAMBERS FOR INCREASING THE PRESSURE WITHIN SAID SEALING DEVICE TO PREVENT THE ESCAPE OF PRESSURE FROM SAID VESSEL, AND WHEREIN SAID CHAMBERS FORMED BETWEEN THE PLURALITY OF DIAPHRAGM MEANS INCLUDE VENTING MEANS FOR EXHAUSTING FLUID TO THE ATMOSPHERE, WHEREBY A FLUID STREAM IS CREATED IN SAID SEALING DEVICE AND CONDENSATION OF STEAM ONTO INCOMING CONTINUOUS LENGTH MATERIAL IS PREVENTED.
Claim 2
Dependent Claim
183 words
A SEALING DEVICE FOR PRESSURE SEALING A VESSEL FROM AN EXTERNAL ATMOSPHERE AND FOR PASSING A CONTINUOUS LENGTH OF MATERIAL INTO AND OUT OF SAID VESSEL THROUGH SAID SEALING DEVICE, COMPRISING: A HOLLOW CASING HAVING AN OPENING AT EACH END, SAID CASING BEING MOUNTED OVER AN OPENING INTO SAID VESSEL, A PLURALITY OF FLEXIBLE DIAPHRAGM MEANS INCLUDED IN SAID CASING AND SPACED FROM ONE ANOTHER ALONG THE LENGTH OF SAID SEALING DEVICE SO AS TO DEFINE A PLURALITY OF CHAMBERS IN SAID SEALING DEVICE, SAID PLURALITY OF FLEXIBLE DIAPHRAGM MEANS EACH HAVING A CENTRAL OPENING THERETHROUGH FOR ALLOWING THE PASSAGE OF CONTINUOUS LENGTH MATERIAL THROUGH THE PLURALITY OF DIAPHRAGM MEANS AND MEANS FOR INTRODUCING A FLUID INTO AT LEAST ONE OF SAID PLURALITY OF CHAMBERS FOR INCREASING THE PRESSURE WITHIN SAID SEALING DEVICE TO PREVENT THE ESCAPE OF PRESSURE FROM SAID VESSEL, AND WHEREIN SAID CHAMBERS FORMED BETWEEN THE PLURALITY OF DIAPHRAGM MEANS INCLUDE VENTING MEANS FOR EXHAUSTING FLUID TO THE ATMOSPHERE, WHEREBY A FLUID STREAM IS CREATED IN SAID SEALING DEVICE AND CONDENSATION OF STEAM ONTO INCOMING CONTINUOUS LENGTH MATERIAL IS PREVENTED.
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |