US3085502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic choke control for a screw press
Assignee: FMC Corp
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Filing: 1958-08-15
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Granted: 1963-04-16
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Expires: 1978-08-15
Abstract
No abstract record available.
Inventors
- 👤 Roy E Hurtig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:39
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/12; B30B9/18; B30B9/125; D; D21; D21B; D21B1/00; D21B1/04; D21B1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A PRESS STRUCTURE HAVING A CYLINDRICAL SCREEN HAVING A DISCHARGE END, A SCREW WITHIN THE SCREEN, DRIVE MEANS FOR ROTATING SAID SCREW, AND A CHOKE MOUNTED FOR MOVEMENT TOWARD AND AWAY FROM THE DISCHARGE END OF SAID SCREEN, THE IMPROVEMENT WHICH COMPRISES A DOUBLE ACTING PNEUMATIC CYLINDER RIGIDLY CONNECTED TO THE PRESS SCREEN, A PISTON IN SAID CYLINDER CONNECTED TO SAID CHOKE, MEANS FOR SUPPLYING AIR UNDER A PREDETERMINED CONSTANT PRESSURE TO THE SIDE OF SAID PISTON TOWARD SAID SCREEN, A PRESSURE CONTROL UNIT RESPONSIVE TO INCREMENTAL VARIATIONS IN THE REACTION TORQUE ON SAID DRIVE MEANS FOR INCREMENTALLY REGULATING THE ADMISSION OF AIR PRESSURE TO THE
Claim 2
Dependent Claim
107 words
IN A PRESS STRUCTURE HAVING A CYLINDRICAL SCREEN HAVING A DISCHARGE END, A SCREW WITHIN THE SCREEN, DRIVE MEANS FOR ROTATING SAID SCREW, AND A CHOKE MOUNTED FOR MOVEMENT TOWARD AND AWAY FROM THE DISCHARGE END OF SAID SCREEN, THE IMPROVEMENT WHICH COMPRISES A DOUBLE ACTING PNEUMATIC CYLINDER RIGIDLY CONNECTED TO THE PRESS SCREEN, A PISTON IN SAID CYLINDER CONNECTED TO SAID CHOKE, MEANS FOR SUPPLYING AIR UNDER A PREDETERMINED CONSTANT PRESSURE TO THE SIDE OF SAID PISTON TOWARD SAID SCREEN, A PRESSURE CONTROL UNIT RESPONSIVE TO INCREMENTAL VARIATIONS IN THE REACTION TORQUE ON SAID DRIVE MEANS FOR INCREMENTALLY REGULATING THE ADMISSION OF AIR PRESSURE TO THE
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |