US3104678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level controlling device
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-10-05
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Granted: 1963-09-24
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Expires: 1982-10-05
Abstract
No abstract record available.
Inventors
- 👤 Cole Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
FLUID CONTROLLING APPARATUS COMPRISING A LIQUID SUPPLY CONTROL VALVE, PNEUMATIC CONTROL MEANS FOR REGULATING THE OPERATION OF SAID CONTROL VALVE INCLUDING INLET MEANS FOR COMPRESSED AIR, A NOZZLE RESTRICTOR IN COMMUNICATION WITH SAID INLET MEANS AND A PILOT VALVE HAVING AN ADJUSTABLE LEAK IN COMMUNICATION WITH SAID RESTRICTOR, MEANS FOR BIASING SAID PILOT VALVE TOWARDS THE CLOSED POSITION, SAID CONTROL MEANS INCLUDING A DIAPHRAGM DEFINING A FIRST AND SECOND CHAMBER, MEANS MECHANICALLY CONNECTING SAID DIAPHRAGM TO SAID PILOT VALVE, A FIRST GAS LINE CONNECTING SAID PILOT VALVE LEAK TO SAID FIRST CHAMBER, A SECOND GAS LINE OPERATIVELY CONNECTED TO SAID FIRST CHAMBER IN COMMUNICATION WITH THE ATMOSPHERE, AN ADJUSTABLE FEED BACK RESTRICTOR IN SAID LAST-MENTIONED LINE, FLUID PRESSURE SENSING MEANS, A THIRD GAS LINE CONNECTING SAID FLUID PRES-
Claim 2
Dependent Claim
128 words
FLUID CONTROLLING APPARATUS COMPRISING A LIQUID SUPPLY CONTROL VALVE, PNEUMATIC CONTROL MEANS FOR REGULATING THE OPERATION OF SAID CONTROL VALVE INCLUDING INLET MEANS FOR COMPRESSED AIR, A NOZZLE RESTRICTOR IN COMMUNICATION WITH SAID INLET MEANS AND A PILOT VALVE HAVING AN ADJUSTABLE LEAK IN COMMUNICATION WITH SAID RESTRICTOR, MEANS FOR BIASING SAID PILOT VALVE TOWARDS THE CLOSED POSITION, SAID CONTROL MEANS INCLUDING A DIAPHRAGM DEFINING A FIRST AND SECOND CHAMBER, MEANS MECHANICALLY CONNECTING SAID DIAPHRAGM TO SAID PILOT VALVE, A FIRST GAS LINE CONNECTING SAID PILOT VALVE LEAK TO SAID FIRST CHAMBER, A SECOND GAS LINE OPERATIVELY CONNECTED TO SAID FIRST CHAMBER IN COMMUNICATION WITH THE ATMOSPHERE, AN ADJUSTABLE FEED BACK RESTRICTOR IN SAID LAST-MENTIONED LINE, FLUID PRESSURE SENSING MEANS, A THIRD GAS LINE CONNECTING SAID FLUID PRES-
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |