Patent US2673579A successfully refreshed from Google Patents.
Patent US3330218A successfully refreshed from Google Patents.
US3330218A
Expired / Lapsed
US
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Metering pump
Assignee: Individual
•
Filing: 1965-06-11
•
Granted: 1967-07-11
•
Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 James H Bumstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:06
CPC Classifications
F; F04; F04B; F04B13/00; G; G01; G01F; G01F11/00; G01F11/28; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A LIQUID TRANSFER DEVICE COMPRISING A PRESSURE VESSEL HAVING; A LIQUID INLET PIPE ADAPTED FOR CONNECTION TO A SOURCE OF LIQUID TO BE METERED; A GAS OUTLET PIPE CONNECTED TO THE UPPER PORTION OF SAID PRESSURE VESSEL, FOR VENTING GAS EXPELLED FROM THE PRESSURE VESSEL WHILE THE LATTER IS BEING FILLED WITH LIQUID; A GAS INLET PIPE ADAPTED FOR CONNECTION TO A SOURCE OF PRESSURIZED GAS, AND HAVING GAS REGULATING VALVE MEANS OPERABLE TO CONTROL THE FLOW OF PRESSURIZED GAS INTO THE LIQUID-FILLED PRESSURE VESSEL; A LIQUID OUTLET PIPE CONNECTED TO THE LOWER PART OF THE PRESSURE VESSEL, AND HAVING A LIQUID METERING DEVICE PROVIDED THEREIN; AND CONTROL MEANS OPERATIVELY CONNECTED TO SAID GAS REGULATING VALVE FOR CONTROLLING THE FLOW OF GAS INTO SAID PRESSURE VESSEL RESPONSIVE TO THE METERED OUTFLOW OF SAID LIQUID THROUGH SAID OUTLET PIPE.
Claim 2
Dependent Claim
138 words
A LIQUID TRANSFER DEVICE COMPRISING A PRESSURE VESSEL HAVING; A LIQUID INLET PIPE ADAPTED FOR CONNECTION TO A SOURCE OF LIQUID TO BE METERED; A GAS OUTLET PIPE CONNECTED TO THE UPPER PORTION OF SAID PRESSURE VESSEL, FOR VENTING GAS EXPELLED FROM THE PRESSURE VESSEL WHILE THE LATTER IS BEING FILLED WITH LIQUID; A GAS INLET PIPE ADAPTED FOR CONNECTION TO A SOURCE OF PRESSURIZED GAS, AND HAVING GAS REGULATING VALVE MEANS OPERABLE TO CONTROL THE FLOW OF PRESSURIZED GAS INTO THE LIQUID-FILLED PRESSURE VESSEL; A LIQUID OUTLET PIPE CONNECTED TO THE LOWER PART OF THE PRESSURE VESSEL, AND HAVING A LIQUID METERING DEVICE PROVIDED THEREIN; AND CONTROL MEANS OPERATIVELY CONNECTED TO SAID GAS REGULATING VALVE FOR CONTROLLING THE FLOW OF GAS INTO SAID PRESSURE VESSEL RESPONSIVE TO THE METERED OUTFLOW OF SAID LIQUID THROUGH SAID OUTLET PIPE.
References Cited (Backward Citations)
US2339487A
Cited
US2572082A
Cited
US2630249A
Cited
US2892416A
Cited
US3097659A
Cited
US3208934A
Cited
US3262396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |