US3311234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for pneumatically separating solid particles
Assignee: Individual
•
Filing: 1964-12-17
•
Granted: 1967-03-28
•
Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 Rumpf Hans
- 👤 Leschonski Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:00
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B4/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A DEVICE FOR SHIFTING GRANULAR MATERIAL IN A TRANSVERSE CURRENT, COMPRISING, IN COMBINATION, A PROJECTING DEVICE FOR INTRODUCING ALL THE PARTICLES OF SAID MATERIAL IN A THIN LAYER AND AT A PREDETERMINED FORWARDING VELOCITY INTO A GASEOUS CURRENT, A FLOW DUCT FOR INTRODUCING SAID CURRENT, IN THE FORM OF A LAMINAR FLOW CORE, INTO A SHIFTING ZONE WHERE IT ENTRAINS SAID PATICLES, AT LEAST ONE COARSE-MATERIAL WITHDRAWAL DUCT WHICH OPENS UPWARDLY TO SAID SIFTING ZONE BELOW SAID FLOW DUCT AND IN FRONT OF SAID PROJECTING DEVICE, SAID CURRENT HAVING A ZONE OF TURBULENCE AT THE AREA OF SAID CORE BETWEEN SAID SIFTING ZONE AND SAID COARSE MATERIAL WITHDRAWAL DUCT, AT LEAST ONE BLADE AT THE INLET EDGE OF SAID COARSE-MATERIAL DUCT, SAID BLADE BEING ADJUSTABLE PARALLEL TO THE DIRECTION OF STREAM LINES OF SAID CURRENT, AND A SECONDARY INLET FOR INTRODUCING ADDITIONAL GAS INTO SAID ZONE OF TURBULENCE AND INTO SAID COARSE-MATERIAL DUCT, SAID SECONDARY INLET BEING SITUATED LATERALLY OF SAID FLOW DUCT AND APPROXIMATELY PARALLEL THERETO AND HAVING AN OUTLET DIRECTED TOWARD SAID COARSEMATERIAL DUCT.
Claim 2
Independent Claim
176 words
A DEVICE FOR SHIFTING GRANULAR MATERIAL IN A TRANSVERSE CURRENT, COMPRISING, IN COMBINATION, A PROJECTING DEVICE FOR INTRODUCING ALL THE PARTICLES OF SAID MATERIAL IN A THIN LAYER AND AT A PREDETERMINED FORWARDING VELOCITY INTO A GASEOUS CURRENT, A FLOW DUCT FOR INTRODUCING SAID CURRENT, IN THE FORM OF A LAMINAR FLOW CORE, INTO A SHIFTING ZONE WHERE IT ENTRAINS SAID PATICLES, AT LEAST ONE COARSE-MATERIAL WITHDRAWAL DUCT WHICH OPENS UPWARDLY TO SAID SIFTING ZONE BELOW SAID FLOW DUCT AND IN FRONT OF SAID PROJECTING DEVICE, SAID CURRENT HAVING A ZONE OF TURBULENCE AT THE AREA OF SAID CORE BETWEEN SAID SIFTING ZONE AND SAID COARSE MATERIAL WITHDRAWAL DUCT, AT LEAST ONE BLADE AT THE INLET EDGE OF SAID COARSE-MATERIAL DUCT, SAID BLADE BEING ADJUSTABLE PARALLEL TO THE DIRECTION OF STREAM LINES OF SAID CURRENT, AND A SECONDARY INLET FOR INTRODUCING ADDITIONAL GAS INTO SAID ZONE OF TURBULENCE AND INTO SAID COARSE-MATERIAL DUCT, SAID SECONDARY INLET BEING SITUATED LATERALLY OF SAID FLOW DUCT AND APPROXIMATELY PARALLEL THERETO AND HAVING AN OUTLET DIRECTED TOWARD SAID COARSEMATERIAL DUCT.
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |