Patent US3379404A successfully refreshed from Google Patents.
US3379404A
Expired / Lapsed
US
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Control system
Assignee: ACF Industries Inc
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Filing: 1964-09-18
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Granted: 1968-04-23
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Expires: 1984-09-18
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:40
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/0355; B; B63; B63B; B63B22/00; B63B22/02; B63B22/021; E21B34/00; E21B34/02; E21B34/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A SELF-CONTAINED APPARATUS FOR CONTROLLING OPENING AND CLOSING OF AT LEAST ONE VALVE HAVING A MOVABLE VALVE MEMBER AND A RECIPROCATING STEM CONNECTED TO SAID VALVE MEMBER, SAID APPARATUS COMPRISING A POWER OPERATOR HAVING A CYLINDER, A PISTON DISPOSED IN THE CYLINDER AND DIVIDING THE CYLINDER INTO TWO COMPARTMENTS, SAID PISTON ADAPTED TO IMPART LONGITUDINAL MOVEMENT TO THE STEM FOR OPENING AND CLOSING THE VALVE, A PAIR OF PRESSURE CONDUITS EXTENDING ONE FROM EACH OF SAID TWO COMPARTMENTS, A RESERVOIR FOR STORAGE OF HYDRAULIC FLUID, FLUID PUMP MEANS CONNECTED TO SAID RESERVOIR, HYDRAULIC SUPPLY LINES INTERCONNECTING SAID PUMP MEANS AND SAID CONDUITS FOR SUPPLYING HYDRAULIC FLUID FROM SAID PUMP MEANS TO SAID PRESSURE CONDUITS, COMPRESSED GAS ENERGIZED MOTOR MEANS FOR DRIVING SAID FLUID PUMP MEANS, A SELF-CONTAINED SOURCE OF COMPRESSED GAS SUPPLYING COMPRESSED GAS TO
Claim 2
Dependent Claim
135 words
A SELF-CONTAINED APPARATUS FOR CONTROLLING OPENING AND CLOSING OF AT LEAST ONE VALVE HAVING A MOVABLE VALVE MEMBER AND A RECIPROCATING STEM CONNECTED TO SAID VALVE MEMBER, SAID APPARATUS COMPRISING A POWER OPERATOR HAVING A CYLINDER, A PISTON DISPOSED IN THE CYLINDER AND DIVIDING THE CYLINDER INTO TWO COMPARTMENTS, SAID PISTON ADAPTED TO IMPART LONGITUDINAL MOVEMENT TO THE STEM FOR OPENING AND CLOSING THE VALVE, A PAIR OF PRESSURE CONDUITS EXTENDING ONE FROM EACH OF SAID TWO COMPARTMENTS, A RESERVOIR FOR STORAGE OF HYDRAULIC FLUID, FLUID PUMP MEANS CONNECTED TO SAID RESERVOIR, HYDRAULIC SUPPLY LINES INTERCONNECTING SAID PUMP MEANS AND SAID CONDUITS FOR SUPPLYING HYDRAULIC FLUID FROM SAID PUMP MEANS TO SAID PRESSURE CONDUITS, COMPRESSED GAS ENERGIZED MOTOR MEANS FOR DRIVING SAID FLUID PUMP MEANS, A SELF-CONTAINED SOURCE OF COMPRESSED GAS SUPPLYING COMPRESSED GAS TO
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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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |