US3247499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow responsive means
Assignee: Babcock International Ltd
•
Filing: 1963-01-18
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Granted: 1966-04-19
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Expires: 1983-01-18
Abstract
No abstract record available.
Inventors
- 👤 Owen W Dumpleton
- 👤 Lisowski Jerzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:02
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0013; G01P13/002; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/38; G01F1/383; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A FLUID FLOW RESPONSIVE MEANS COMPRISING A FLUID FLOW PATH, A MAGNETIC ARMATURE MOVABLY POSITIONED IN SAID FLOW PATH AND ARRANGED FOR FLUID FLOW THEREOVER, STOP MEANS ARRANGED TO LIMIT THE MOVEMENT OF SAID ARMATURE WITHIN SAID FLUID FLOW PATH TO A FIRST POSITION AND A SECOND POSITION AND A MAGNETIC FORCE, PRODUCING MEANS DISPOSED ABOUT SAID ARMATURE AND OPERATING TO MAINTAIN SAID ARMATURE IN SAID FIRST POSITION UNTIL A FIRST PREDETERMINED FLOW RATE IS ACHIEVED, SAID ARMATURE WHEN IN SAID FIRST POSITION BEING SUBSTANTIALLY WITHIN THE INFLUENCE OF SAID MAGNETIC FORCE, SAID FLUID FLOW PRODUCING A PRESSURE DROP ACROSS SAID ARMATURE, SAID ARMATURE ARRANGED TO BE MOVED BY SAID PRESSURE DROP AT SAID FIRST PREDETERMINED FLOW RATE AGAINST SAID MAGNETIC FORCE FROM SAID FIRST POSITION TO SAID SECOND POSITION WHERE SAID ARMATURE IS SUBSTANTIALLY OUT OF THE INFLUENCE OF SAID MAGNETIC FORCE, SAID ARMATURE BEING MAINTAINED IN SAID SECOND POSITION BY SAID FLUID FLOW UNTIL THE FLOW RATE FALLS BELOW A SECOND PREDETERMINED FLOW RATE, SAID ARMATURE ARRANGED TO BE RETURNED TO SAID FIRST POSITION BY SAID MAGNETIC FORCE WHEN SAID FLUID FLOW FALLS BELOW SAID SECOND PREDETERMINED FLOW RATE, SAID SECOND PREDETERMINED FLOW RATE BEING LESS THAN SAID FIRST PREDETERMINED FLOW RATE.
Claim 2
Dependent Claim
204 words
A FLUID FLOW RESPONSIVE MEANS COMPRISING A FLUID FLOW PATH, A MAGNETIC ARMATURE MOVABLY POSITIONED IN SAID FLOW PATH AND ARRANGED FOR FLUID FLOW THEREOVER, STOP MEANS ARRANGED TO LIMIT THE MOVEMENT OF SAID ARMATURE WITHIN SAID FLUID FLOW PATH TO A FIRST POSITION AND A SECOND POSITION AND A MAGNETIC FORCE, PRODUCING MEANS DISPOSED ABOUT SAID ARMATURE AND OPERATING TO MAINTAIN SAID ARMATURE IN SAID FIRST POSITION UNTIL A FIRST PREDETERMINED FLOW RATE IS ACHIEVED, SAID ARMATURE WHEN IN SAID FIRST POSITION BEING SUBSTANTIALLY WITHIN THE INFLUENCE OF SAID MAGNETIC FORCE, SAID FLUID FLOW PRODUCING A PRESSURE DROP ACROSS SAID ARMATURE, SAID ARMATURE ARRANGED TO BE MOVED BY SAID PRESSURE DROP AT SAID FIRST PREDETERMINED FLOW RATE AGAINST SAID MAGNETIC FORCE FROM SAID FIRST POSITION TO SAID SECOND POSITION WHERE SAID ARMATURE IS SUBSTANTIALLY OUT OF THE INFLUENCE OF SAID MAGNETIC FORCE, SAID ARMATURE BEING MAINTAINED IN SAID SECOND POSITION BY SAID FLUID FLOW UNTIL THE FLOW RATE FALLS BELOW A SECOND PREDETERMINED FLOW RATE, SAID ARMATURE ARRANGED TO BE RETURNED TO SAID FIRST POSITION BY SAID MAGNETIC FORCE WHEN SAID FLUID FLOW FALLS BELOW SAID SECOND PREDETERMINED FLOW RATE, SAID SECOND PREDETERMINED FLOW RATE BEING LESS THAN SAID FIRST PREDETERMINED FLOW RATE.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |