US3339731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen drum
Assignee: Individual
•
Filing: 1964-04-22
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Granted: 1967-09-05
•
Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Merges Herbert Alfred
- 👤 Krestin Hans Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:50
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/18; B07B1/22; B02; B02C; B02C13/00; B02C13/26; B02C13/282; B02C13/284; B07B1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A SCREEN DRUM, PARTICULARLY FOR USE IN PULVERIZERS OR MILLS, SAID DRUM COMPRISING: A CYLINDRICAL SCREEN PLATE; OVERLAPPING END PORTIONS OF SAID PLATE EXTENDING AXIALLY ALONG SAID DRUM TO FORM A SEAM; ONE OF SAID END PORTIONS OF SAID CYLINDRICAL SCREEN PLATE BEING RADIALLY PERIPHERALLY OFFSET AT SAID SEAM SO AS SMOOTHLY TO OVERLAP THE OTHER NON-OFFSET END PORTION; OUTER AXIALLY SPACED SCREEN SUPPORTING RINGS; A TRANSVERSE AXIAL CONNECTING MEMBER BETWEEN SAID RINGS, SECURING SAID RINGS IN POSITION; INNER LATERAL PLATE RETAINING SLOT RECESSES IN SAID SUPPORTING RINGS; AND THE OFFSET END PORTIONS OF SAID SCREEN PLATE ENGAGING INTO SAID SLOT RECESSES IN SAID SUPPORTING RINGS.
Claim 2
Dependent Claim
106 words
A SCREEN DRUM, PARTICULARLY FOR USE IN PULVERIZERS OR MILLS, SAID DRUM COMPRISING: A CYLINDRICAL SCREEN PLATE; OVERLAPPING END PORTIONS OF SAID PLATE EXTENDING AXIALLY ALONG SAID DRUM TO FORM A SEAM; ONE OF SAID END PORTIONS OF SAID CYLINDRICAL SCREEN PLATE BEING RADIALLY PERIPHERALLY OFFSET AT SAID SEAM SO AS SMOOTHLY TO OVERLAP THE OTHER NON-OFFSET END PORTION; OUTER AXIALLY SPACED SCREEN SUPPORTING RINGS; A TRANSVERSE AXIAL CONNECTING MEMBER BETWEEN SAID RINGS, SECURING SAID RINGS IN POSITION; INNER LATERAL PLATE RETAINING SLOT RECESSES IN SAID SUPPORTING RINGS; AND THE OFFSET END PORTIONS OF SAID SCREEN PLATE ENGAGING INTO SAID SLOT RECESSES IN SAID SUPPORTING RINGS.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |