US3133798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical belt drier
Assignee: Buttner Werke AG
•
Filing: 1960-12-22
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Granted: 1964-05-19
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Expires: 1980-12-22
Abstract
No abstract record available.
Inventors
- 👤 Feld Erich
- 👤 Hensel Otto
- 👤 Roos Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/90; F; F26; F26B; F26B15/00; F26B15/26; B; B65; B65G; B65G2207/00; B65G2207/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A HELICAL BELT DRIER COMPRISING A DRIER HOUSING A ROTARY FRAME WITHIN SAID HOUSING FROMED OF A CLOSED CYLINDER AND DEFINING AN ANNULAR DRYING CHAMBER WITH SAID HOUSING, CONVEYING MEANS IN SAID CHAMBER WRAPPED AROUND SAID FRAME, GUIDE MEANS GUIDING SAID CONVEYOR MEANS ALONG A HELICAL COURSE THROUGH SAID KCHAMBER, AND A PLURALITY OF HOT AIR SUPPLY DUCTS AND A PLURALITY OF DISCHARGE DUCTS COMMUNICATING WITH SAID CHAMBER THROUGH SAID HOUSING AND ARRANGED ALTERNATELY ONE ABOVE THE OTHER, SAID HOT AIR SUPPLY DUCTS AND SAID DISCHARGE DUCTS BEING ECCENTRIC AS VIEWED IN A PLAN VIEW AND ADAPTED TO BE CONNECTED TO HOT AIR SUPPLY PIPES AND DISCHARGE PIPES IN THE REGION OF THE WIDEST SIDE OF THE ECCENTRIC PORTION THEREOF.
Claim 2
Dependent Claim
120 words
A HELICAL BELT DRIER COMPRISING A DRIER HOUSING A ROTARY FRAME WITHIN SAID HOUSING FROMED OF A CLOSED CYLINDER AND DEFINING AN ANNULAR DRYING CHAMBER WITH SAID HOUSING, CONVEYING MEANS IN SAID CHAMBER WRAPPED AROUND SAID FRAME, GUIDE MEANS GUIDING SAID CONVEYOR MEANS ALONG A HELICAL COURSE THROUGH SAID KCHAMBER, AND A PLURALITY OF HOT AIR SUPPLY DUCTS AND A PLURALITY OF DISCHARGE DUCTS COMMUNICATING WITH SAID CHAMBER THROUGH SAID HOUSING AND ARRANGED ALTERNATELY ONE ABOVE THE OTHER, SAID HOT AIR SUPPLY DUCTS AND SAID DISCHARGE DUCTS BEING ECCENTRIC AS VIEWED IN A PLAN VIEW AND ADAPTED TO BE CONNECTED TO HOT AIR SUPPLY PIPES AND DISCHARGE PIPES IN THE REGION OF THE WIDEST SIDE OF THE ECCENTRIC PORTION THEREOF.
References Cited (Backward Citations)
US616293A
Cited
DE567725C
Cited
US1706186A
Cited
US2093270A
Cited
FR798047A
Cited
FR840896A
Cited
US2385628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |