Patent US3128709A successfully refreshed from Google Patents.
US3128709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for pumping liquids into and out of tanks
Assignee: Weir Group PLC
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Filing: 1962-06-14
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Granted: 1964-04-14
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Expires: 1982-06-14
Abstract
No abstract record available.
Inventors
- 👤 George F Arkless
- 👤 Forrest T Randell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:24
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187; Y10T137/8622
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A SYSTEM FOR PUMPING LIQUIDS INTO AND OUT OF A MAIN STORAGE TANK, INCLUDING AN AUXILIARY TANK, A PUMP THE SUCTION OF WHICH IS IN COMMUNICATION WITH THE INTERIOR OF THE AUXILIARY TANK, A JET PUMP LOCATED IN THE MAIN TANK ADJACENT THE BOTTOM THEREOF, A BRANCH CONNECTING THE DISCHARGE FROM THE PUMP TO THE SUCTION OF THE JET PUMP, A DUCT CONNECTING THE DISCHARGE FROM THE JET PUMP TO THE INTERIOR OF THE AUXILIARY TANK WHEREBY LIQUID MAY CIRCULATE THROUGH THE PUMP, THE JET PUMP, THE AUXILIARY TANK AND BACK TO THE PUMP AND MEANS FOR CONTROLLING THE FLOW OF LIQUID THROUGH THE BRANCH CONNECTING THE PUMP DISCHARGE WITH THE JET PUMP SUCTION, SAID MEANS COMPRISING A DEVICE LOCATED WITHIN THE AUXILIARY TANK AND SENSITIVE TO THE LEVEL OF LIQUID IN THE AUXILIARY TANK, A THROTTLE VALVE INTERCALATED IN THE BRANCH CONNECTING THE PUMP DISCHARGE WITH THE JET PUMP, AND MEANS OPERATIVELY CONNECTING THE DEVICE TO THE THROTTLE VALVE TO CONTROL THE FLOW OF LIQUID THROUGH THE AFORESAID BRANCH.
Claim 2
Independent Claim
170 words
A SYSTEM FOR PUMPING LIQUIDS INTO AND OUT OF A MAIN STORAGE TANK, INCLUDING AN AUXILIARY TANK, A PUMP THE SUCTION OF WHICH IS IN COMMUNICATION WITH THE INTERIOR OF THE AUXILIARY TANK, A JET PUMP LOCATED IN THE MAIN TANK ADJACENT THE BOTTOM THEREOF, A BRANCH CONNECTING THE DISCHARGE FROM THE PUMP TO THE SUCTION OF THE JET PUMP, A DUCT CONNECTING THE DISCHARGE FROM THE JET PUMP TO THE INTERIOR OF THE AUXILIARY TANK WHEREBY LIQUID MAY CIRCULATE THROUGH THE PUMP, THE JET PUMP, THE AUXILIARY TANK AND BACK TO THE PUMP AND MEANS FOR CONTROLLING THE FLOW OF LIQUID THROUGH THE BRANCH CONNECTING THE PUMP DISCHARGE WITH THE JET PUMP SUCTION, SAID MEANS COMPRISING A DEVICE LOCATED WITHIN THE AUXILIARY TANK AND SENSITIVE TO THE LEVEL OF LIQUID IN THE AUXILIARY TANK, A THROTTLE VALVE INTERCALATED IN THE BRANCH CONNECTING THE PUMP DISCHARGE WITH THE JET PUMP, AND MEANS OPERATIVELY CONNECTING THE DEVICE TO THE THROTTLE VALVE TO CONTROL THE FLOW OF LIQUID THROUGH THE AFORESAID BRANCH.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |