Patent US3002828A successfully refreshed from Google Patents.
US3002828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasholder seal
Assignee: Pittsburgh Des Moines Steel Co
•
Filing: 1958-06-09
•
Granted: 1961-10-03
•
Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Alexander F Fino
- 👤 John M Swick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:08
CPC Classifications
F; F17; F17B; F17B1/00; F17B1/02; F17B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A GAS HOLDER HAVING A CYLINDRICAL WALL, ROOF, AND A BOTTOM WALL, A FLOATING COVER DISPOSED WITHIN SAID TANK ADAPTED TO RISE AND FALL IN ACCORDANCE WITH GAS PRESSURE WITHIN THE TANK, SAID COVER BEING OF SMALLER DIAMETER THAN THE INSIDE OF SAID CYLINDRICAL WALL TO PROVIDE AN ANNULAR SPACE BETWEEN THE PERIPHERY OF THE COVER AND THE TANK, A FIRST LIQUID CONTAINING FLEXIBLE HOLLOW ANNULAR MEMBER SUPPORTED BY SAID COVER ADJACENT THE LOWER PORTION THEREOF AND EXTENDING COMPLETELY THEREAROUND, A SECOND LIQUID CONTAINING FLEXIBLE HOLLOW ANNULAR MEMBER SUPPORTED BY SAID COVER ADJACENT THE UPPER PORTION THEREOF AND SPACED FROM SAID FIRST HOLLOW MEMBER AND EXTENDING COMPLETELY THEREAROUND, A FIRST FLEXIBLE ANNULAR BAND HAVING THE UPPER AND LOWER EDGES THEREOF CONNECTED TO SAID COVER AND ENGAGING SAID SECOND HOLLOW MEMBER FOR AT LEAST PARTIALLY SUPPORTING SAID SECOND HOLLOW MEMBER AND EXTENDING COMPLETELY AROUND SAID COVER, A SECOND FLEXIBLE ANNULAR BAND HAVING THE UPPER AND LOWER EDGES THEREOF CONNECTED TO SAID COVER AND EXTENDING COMPLETELY THEREAROUND AND ENGAGING SAID FIRST HOLLOW MEMBER FOR AT LEAST PARTIALLY SUPPORTING SAID FIRST HOLLOW MEMBER, SAID SECOND ANNULAR BAND BEING SPACED FROM SAID COVER AND SPANNING THE SPACE BETWEEN SAID FIRST AND SECOND HOLLOW MEMBERS FOR DEFINING A CLOSED GAS CHAMBER THEREBETWEEN AND CONTACTING THE INNER SURFACE OF SAID CYLINDRICAL WALL.
Claim 2
Dependent Claim
216 words
A GAS HOLDER HAVING A CYLINDRICAL WALL, ROOF, AND A BOTTOM WALL, A FLOATING COVER DISPOSED WITHIN SAID TANK ADAPTED TO RISE AND FALL IN ACCORDANCE WITH GAS PRESSURE WITHIN THE TANK, SAID COVER BEING OF SMALLER DIAMETER THAN THE INSIDE OF SAID CYLINDRICAL WALL TO PROVIDE AN ANNULAR SPACE BETWEEN THE PERIPHERY OF THE COVER AND THE TANK, A FIRST LIQUID CONTAINING FLEXIBLE HOLLOW ANNULAR MEMBER SUPPORTED BY SAID COVER ADJACENT THE LOWER PORTION THEREOF AND EXTENDING COMPLETELY THEREAROUND, A SECOND LIQUID CONTAINING FLEXIBLE HOLLOW ANNULAR MEMBER SUPPORTED BY SAID COVER ADJACENT THE UPPER PORTION THEREOF AND SPACED FROM SAID FIRST HOLLOW MEMBER AND EXTENDING COMPLETELY THEREAROUND, A FIRST FLEXIBLE ANNULAR BAND HAVING THE UPPER AND LOWER EDGES THEREOF CONNECTED TO SAID COVER AND ENGAGING SAID SECOND HOLLOW MEMBER FOR AT LEAST PARTIALLY SUPPORTING SAID SECOND HOLLOW MEMBER AND EXTENDING COMPLETELY AROUND SAID COVER, A SECOND FLEXIBLE ANNULAR BAND HAVING THE UPPER AND LOWER EDGES THEREOF CONNECTED TO SAID COVER AND EXTENDING COMPLETELY THEREAROUND AND ENGAGING SAID FIRST HOLLOW MEMBER FOR AT LEAST PARTIALLY SUPPORTING SAID FIRST HOLLOW MEMBER, SAID SECOND ANNULAR BAND BEING SPACED FROM SAID COVER AND SPANNING THE SPACE BETWEEN SAID FIRST AND SECOND HOLLOW MEMBERS FOR DEFINING A CLOSED GAS CHAMBER THEREBETWEEN AND CONTACTING THE INNER SURFACE OF SAID CYLINDRICAL WALL.
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) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |