US3282067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means for conveyor ports of a material treatment chamber
Assignee: Frick Co Inc
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Filing: 1965-04-01
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Granted: 1966-11-01
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Moshe Y Dreksler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:22
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/44; F; F16; F16J; F16J15/00; F16J15/16; F16J15/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN COMBINATION WITH A CHAMBER HAVING VERTICALLY SPACED PORTS IN THE WALLS THEREOF THROUGH WHICH A CONVEYOR BELT EXTENDS AND WHEREIN AIR PRESSURE WITHIN THE CHAMBER ADJACENT A LOWER PORT IS DIFFERENT FROM THE AIR PRESSURE ADJACENT AN UPPER PORT, A SEALING MEANS FOR SUCH PORTS COMPRISING MECHANICAL SEAL MEANS CONSISTING OF A PLURALITY OF FLEXIBLE WALLS DISPOSED WITHIN THE PORTS IN SPACED RELATIONSHIP TO EACH OTHER AND ENGAGING THE CONVEYOR BELT TO FORM AT LEAST ONE COMPARTMENT WITHIN EACH OF SAID PORTS, AND CONDUIT MEANS FOR COMMUNICATING EACH OF SAID COMPARTMENTS TO TEND TO EQUALIZE THE PRESSURE IN THE COMPARTMENTS OF THE VERTICALLY SPACED PORTS.
Claim 2
Dependent Claim
106 words
IN COMBINATION WITH A CHAMBER HAVING VERTICALLY SPACED PORTS IN THE WALLS THEREOF THROUGH WHICH A CONVEYOR BELT EXTENDS AND WHEREIN AIR PRESSURE WITHIN THE CHAMBER ADJACENT A LOWER PORT IS DIFFERENT FROM THE AIR PRESSURE ADJACENT AN UPPER PORT, A SEALING MEANS FOR SUCH PORTS COMPRISING MECHANICAL SEAL MEANS CONSISTING OF A PLURALITY OF FLEXIBLE WALLS DISPOSED WITHIN THE PORTS IN SPACED RELATIONSHIP TO EACH OTHER AND ENGAGING THE CONVEYOR BELT TO FORM AT LEAST ONE COMPARTMENT WITHIN EACH OF SAID PORTS, AND CONDUIT MEANS FOR COMMUNICATING EACH OF SAID COMPARTMENTS TO TEND TO EQUALIZE THE PRESSURE IN THE COMPARTMENTS OF THE VERTICALLY SPACED PORTS.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |