Patent US3101031A successfully refreshed from Google Patents.
US3101031A
Expired / Lapsed
US
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Electro-hydraulic actuator system
Assignee: Robertshaw Controls Co
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Filing: 1960-09-08
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Granted: 1963-08-20
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Expires: 1980-09-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry E Crossley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:43
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/09; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
AN ELECTRO-HYDRAULIC ACTUATOR SYSTEM COMPRISING A HOUSING, A PIVOTALLY SUPPORTED BEAM IN SAID HOUSING, MEANS WITHIN SAID HOUSING DEFINING A MAGNETIC FIELD, A COIL CARRIED BY SAID BEAM AND POSITIONED IN SAID MAGNETIC FIELD, MEANS FOR SUPPLYING A DIRECT CURRENT INPUT SIGNAL TO SAID COIL SO AS TO EXERT A FORCE ON SAID BEAM CORRESPONDING TO SAID INPUT SIGNAL, A CONTROL VALVE POSITIONED WITHIN SAID HOUSING AND HAVING A MOVABLE ELEMENT CONNECTED TO SAID BEAM FOR CONTROLLING FLUID FLOW FROM A VALVE INLET TO A VALVE OUTLET, A SOURCE OF FLUID FOR SUPPLYING FLUID TO SAID VALVE INLET AT RELATIVELY HIGH PRESSURE, A CYLINDER POSITIONED WITHIN SAID HOUSING, A PISTON SLIDABLY MOUNTED IN SAID CYLINDER AND CONNECTED TO AN OUTPUT MEMBER, MEANS CONNECTING SAID VALVE OUTLET AND SAID CYLINDER,
Claim 2
Dependent Claim
129 words
AN ELECTRO-HYDRAULIC ACTUATOR SYSTEM COMPRISING A HOUSING, A PIVOTALLY SUPPORTED BEAM IN SAID HOUSING, MEANS WITHIN SAID HOUSING DEFINING A MAGNETIC FIELD, A COIL CARRIED BY SAID BEAM AND POSITIONED IN SAID MAGNETIC FIELD, MEANS FOR SUPPLYING A DIRECT CURRENT INPUT SIGNAL TO SAID COIL SO AS TO EXERT A FORCE ON SAID BEAM CORRESPONDING TO SAID INPUT SIGNAL, A CONTROL VALVE POSITIONED WITHIN SAID HOUSING AND HAVING A MOVABLE ELEMENT CONNECTED TO SAID BEAM FOR CONTROLLING FLUID FLOW FROM A VALVE INLET TO A VALVE OUTLET, A SOURCE OF FLUID FOR SUPPLYING FLUID TO SAID VALVE INLET AT RELATIVELY HIGH PRESSURE, A CYLINDER POSITIONED WITHIN SAID HOUSING, A PISTON SLIDABLY MOUNTED IN SAID CYLINDER AND CONNECTED TO AN OUTPUT MEMBER, MEANS CONNECTING SAID VALVE OUTLET AND SAID CYLINDER,
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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) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |