US3071447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic classifier
Assignee: Whiting Corp
•
Filing: 1958-09-09
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Granted: 1963-01-01
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Expires: 1978-09-09
Abstract
No abstract record available.
Inventors
- 👤 Tom G Bernhardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:03
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0031; B01D9/0036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A HYDRAULIC CLASSIFIER COMPRISING A VESSEL HAVING A MECHANICAL CIRCULATING MEANS FOR CIRCULATING SLURRY WITHIN SAID VESSEL IN A GENERALLY TOROIDAL FLOW PATTERN WITH THE PRINCIPAL AXIS OF SAID PATTERN BEING APPROXIMATELY VERTICAL, AT LEAST ONE ELUTRIATION COLUMN IN SAID VESSEL HAVING A CHANNEL OF UNIFORM CROSS-SECTION FOR AT LEAST A SUBSTANTIAL PORTION OF ITS HEIGHT, SAID CHANNEL HAVING AN INLET NEAR ITS LOWER END FOR COMMUNICATING WITH SLURRY NEAR THE PERIPHERY OF SAID TOROIDAL FLOW PATTERN AND AN OUTLET AT LEAST A SUBSTANTIAL HEIGHT ABOVE THE LOWER END OF SAID CHANNEL OF UNIFORM CROSS-SECTION, SAID CHANNEL DEFINING A FLOW PATH FOR A PORTION OF THE SLURRY SEPARATE AND DISTINCT FROM SAID TOROIDAL FLOW PATTERN AND EXTENDING FROM SAID CHANNEL INLET TO SAID CHANNEL OUTLET, AND MEANS COMMUNICATING WITH SAID OUTLET FOR SAID CHANNEL FOR WITHDRAWING SLURRY THEREFROM AT A PREDETERMINED RATE, SAID RATE BEING SELECTED TO ESTABLISH A FLOW VELOCITY IN SAID COLUMN TO SUSPEND ONLY PARTICLES FINER THAN A PREDETERMIXED MACIMUM SIZE.
Claim 2
Dependent Claim
164 words
A HYDRAULIC CLASSIFIER COMPRISING A VESSEL HAVING A MECHANICAL CIRCULATING MEANS FOR CIRCULATING SLURRY WITHIN SAID VESSEL IN A GENERALLY TOROIDAL FLOW PATTERN WITH THE PRINCIPAL AXIS OF SAID PATTERN BEING APPROXIMATELY VERTICAL, AT LEAST ONE ELUTRIATION COLUMN IN SAID VESSEL HAVING A CHANNEL OF UNIFORM CROSS-SECTION FOR AT LEAST A SUBSTANTIAL PORTION OF ITS HEIGHT, SAID CHANNEL HAVING AN INLET NEAR ITS LOWER END FOR COMMUNICATING WITH SLURRY NEAR THE PERIPHERY OF SAID TOROIDAL FLOW PATTERN AND AN OUTLET AT LEAST A SUBSTANTIAL HEIGHT ABOVE THE LOWER END OF SAID CHANNEL OF UNIFORM CROSS-SECTION, SAID CHANNEL DEFINING A FLOW PATH FOR A PORTION OF THE SLURRY SEPARATE AND DISTINCT FROM SAID TOROIDAL FLOW PATTERN AND EXTENDING FROM SAID CHANNEL INLET TO SAID CHANNEL OUTLET, AND MEANS COMMUNICATING WITH SAID OUTLET FOR SAID CHANNEL FOR WITHDRAWING SLURRY THEREFROM AT A PREDETERMINED RATE, SAID RATE BEING SELECTED TO ESTABLISH A FLOW VELOCITY IN SAID COLUMN TO SUSPEND ONLY PARTICLES FINER THAN A PREDETERMIXED MACIMUM SIZE.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |