US3399601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic sequential control systems
Assignee: KNDS Defence UK Ltd
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Filing: 1965-03-24
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Granted: 1968-09-03
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Expires: 1985-03-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Fuell
- 👤 Frank G Mattos
- 👤 John L Fowler
- 👤 Bertie G Parkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:35
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/006; E21D23/0065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A HYDRAULIC SYSTEM FOR AUTOMATICALLY PERFORMING A SERIES OF AT LEAST SIX OPERATIONS, COMPRISING FIRST AND SECOND SEQUENCE CONTROLLERS TO INITIATE THE FIRST THREE OPERATIONS AND THE SECOND THREE OPERATIONS IN SEQUENCE, A REVERSING DEVICE FOR REVERSING A NUMBER OF OPERATIONS, AND MEANS FOR ACTUATING THE FIRST SEQUENCE CONTROLLER AND THEN THE SECOND SEQUENCE CONTROLLER, WITH THE REVERSING DEVICE IN ONE POSITION, TO INITIATE THE OPERATIONS IN ONE SEQUENCE, AND TO ACTUATE THE SECOND SEQUENCE CONTROLLER AND THEN THE FIRST SEQUENCE CONTROLLER, WITH THE REVERSING DEVICE IN ANOTHER POSITION, TO INITIATE THE OPERATIONS IN A DIFFERENT SEQUENCE.
Claim 2
Dependent Claim
97 words
A HYDRAULIC SYSTEM FOR AUTOMATICALLY PERFORMING A SERIES OF AT LEAST SIX OPERATIONS, COMPRISING FIRST AND SECOND SEQUENCE CONTROLLERS TO INITIATE THE FIRST THREE OPERATIONS AND THE SECOND THREE OPERATIONS IN SEQUENCE, A REVERSING DEVICE FOR REVERSING A NUMBER OF OPERATIONS, AND MEANS FOR ACTUATING THE FIRST SEQUENCE CONTROLLER AND THEN THE SECOND SEQUENCE CONTROLLER, WITH THE REVERSING DEVICE IN ONE POSITION, TO INITIATE THE OPERATIONS IN ONE SEQUENCE, AND TO ACTUATE THE SECOND SEQUENCE CONTROLLER AND THEN THE FIRST SEQUENCE CONTROLLER, WITH THE REVERSING DEVICE IN ANOTHER POSITION, TO INITIATE THE OPERATIONS IN A DIFFERENT SEQUENCE.
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |