US3200644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control apparatus
Assignee: Phillips Petroleum Co
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Filing: 1961-12-04
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Granted: 1965-08-17
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Jack C Brous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:41
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A LIQUID LEVEL CONTROL APPARATUS COMPRISING: A FLOAT DISPOSED IN A TANK CONTAINING THE LIQUID TO BE GAUGED; AN ARM CONNECTED TO SAID FLOAT AT ONE END AND PIVOTALLY TO A SHAFT AT ITS OTHER END; A HOUSING ADAPTED TO BE SECUREDD TO SAID TANK AND SURROUNDING SAID ARM; A PISTON SECURED TO THE FREE END OF SAID SHAFT; SWITCHING MEANS ADJACENT SAID PISTON; AND MEANS AFFIXED TO SAID PISTON TO TRIP AID SWITCHING MEANS IN ON E DIRECTION AND ALTERNATELY THE OTHER; THE IMPROVEMENT WHICH COMPRISES A PURGE SYSTEM FOR MAINTAINING THE OPERATING COMPONENTS OF SAID CONTROL APPARATUS FREE FROM FOULING BY SAID LIQUID, SAID SYSTEM COMPRISING TUBING MEANS COMMUNICATING WITH SAID HOUSING AND A SOURCE OF FLUID SPACED FROM SAID TANK FOR CONTINUOUSLY PASSING A STREAM OF FLUID INERT TO SAID LIQUID THROUGH SAID HOUSING AND VENTING THE SAME THEREFROM.
Claim 2
Dependent Claim
143 words
IN A LIQUID LEVEL CONTROL APPARATUS COMPRISING: A FLOAT DISPOSED IN A TANK CONTAINING THE LIQUID TO BE GAUGED; AN ARM CONNECTED TO SAID FLOAT AT ONE END AND PIVOTALLY TO A SHAFT AT ITS OTHER END; A HOUSING ADAPTED TO BE SECUREDD TO SAID TANK AND SURROUNDING SAID ARM; A PISTON SECURED TO THE FREE END OF SAID SHAFT; SWITCHING MEANS ADJACENT SAID PISTON; AND MEANS AFFIXED TO SAID PISTON TO TRIP AID SWITCHING MEANS IN ON E DIRECTION AND ALTERNATELY THE OTHER; THE IMPROVEMENT WHICH COMPRISES A PURGE SYSTEM FOR MAINTAINING THE OPERATING COMPONENTS OF SAID CONTROL APPARATUS FREE FROM FOULING BY SAID LIQUID, SAID SYSTEM COMPRISING TUBING MEANS COMMUNICATING WITH SAID HOUSING AND A SOURCE OF FLUID SPACED FROM SAID TANK FOR CONTINUOUSLY PASSING A STREAM OF FLUID INERT TO SAID LIQUID THROUGH SAID HOUSING AND VENTING THE SAME THEREFROM.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |