US2834658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids level indication and control system
Assignee: Union Oil Company of California
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Filing: 1955-01-20
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Granted: 1958-05-13
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Expires: 1975-01-20
Abstract
No abstract record available.
Inventors
- 👤 William C Lieffers
- 👤 Frank C Riddick
- 👤 Robert L Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:06
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1809; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/08; G; G01; G01F; G01F23/00; G01F23/003; B01D2253/00; B01D2253/10; B01D2253/104; B01D2253/106; B01D2253/112; B01D2253/1124; B01D2253/25; B01D2257/00; B01D2257/70; B01D2257/702; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40077; B01D2259/40081; B01D2259/40083; B01D2259/40088; B01D53/04; B01D53/0454; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00079; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/0053; B01J2208/0061; Y; Y10; Y10S; Y10S159/00; Y10S159/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
AN APPARATUS FOR HANDLING GRANULAR SOLID MATERIAL WHICH COMPRISES, IN COMBINATION WITH A VESSEL ADAPTED TO CONFINE IN SAID VESSEL A CONTINUOUS DOWNWARDLY MOVING BED OF SOLIDS, MEANS FOR INTRODUCING AND MEANS FOR REMOVING SUBSTANTIALLY CONTINUOUS STREAMS OF SOLIDS AT THE TOP AND BOTTOM OF SAID VESSEL RESPECTIVELY, A DETECTING ELEMENT HAVING A SMALL CROSS SECTION RELATIVE TO SAID VESSEL AND DISPOSED WITHIN SAID VESSEL OPPOSITE A POINT ALONG THE WALL THEREOF ENTIRELY BELOW THE DESIRED SOLIDS LEVEL, A LEVER ARM CONNECTED AT ONE END TO SAID DETECTING ELEMENT AND EXTENDING THROUGH THE WALL OF SAID VESSEL TO A PIVOTABLE LEVER ARM SUPPORT, A TORQUE TUBE DISPOSED AT SUBSTANTIALLY RIGHT ANGLES TO SAID LEVER ARM AND CONNECTED AT TS INNER END THERETO AND RIGIDLY ANCHORED AT ITS OUTER END, A TORQUE ROD COAXIALLY DISPOSED WITHIN SAID TORQUE TUBE AND INTEGRALLY CONNECTED THERETO AT ITS INNER END, THE OUTER AND FREE END OF SAID TORQUE ROD BEING FREE TO ROTATE THROUGH ANGULAR DEFLECTIONS IN CONTINUOUS RESPONSE TO EQUAL ANGULAR DEFLECTIONS OF SAID LEVER ARM IN RESPONSE TO CHANGES IN DEPTH OF SOLIDS ABOVE SAID DETECTING ELEMENT.
Claim 2
Independent Claim
185 words
AN APPARATUS FOR HANDLING GRANULAR SOLID MATERIAL WHICH COMPRISES, IN COMBINATION WITH A VESSEL ADAPTED TO CONFINE IN SAID VESSEL A CONTINUOUS DOWNWARDLY MOVING BED OF SOLIDS, MEANS FOR INTRODUCING AND MEANS FOR REMOVING SUBSTANTIALLY CONTINUOUS STREAMS OF SOLIDS AT THE TOP AND BOTTOM OF SAID VESSEL RESPECTIVELY, A DETECTING ELEMENT HAVING A SMALL CROSS SECTION RELATIVE TO SAID VESSEL AND DISPOSED WITHIN SAID VESSEL OPPOSITE A POINT ALONG THE WALL THEREOF ENTIRELY BELOW THE DESIRED SOLIDS LEVEL, A LEVER ARM CONNECTED AT ONE END TO SAID DETECTING ELEMENT AND EXTENDING THROUGH THE WALL OF SAID VESSEL TO A PIVOTABLE LEVER ARM SUPPORT, A TORQUE TUBE DISPOSED AT SUBSTANTIALLY RIGHT ANGLES TO SAID LEVER ARM AND CONNECTED AT TS INNER END THERETO AND RIGIDLY ANCHORED AT ITS OUTER END, A TORQUE ROD COAXIALLY DISPOSED WITHIN SAID TORQUE TUBE AND INTEGRALLY CONNECTED THERETO AT ITS INNER END, THE OUTER AND FREE END OF SAID TORQUE ROD BEING FREE TO ROTATE THROUGH ANGULAR DEFLECTIONS IN CONTINUOUS RESPONSE TO EQUAL ANGULAR DEFLECTIONS OF SAID LEVER ARM IN RESPONSE TO CHANGES IN DEPTH OF SOLIDS ABOVE SAID DETECTING ELEMENT.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |