Patent US3241496A successfully refreshed from Google Patents.
US3241496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pumping slurry and like fluids
Assignee: Mitsubishi Shindoh Co Ltd
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Filing: 1964-09-23
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Granted: 1966-03-22
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Expires: 1984-09-23
Abstract
No abstract record available.
Inventors
- 👤 Imai Masaharu
- 👤 Kazama Tosio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:36
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B53/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
247 words
AN APPARATUS FOR PUMPING SLURRY OR THE LIKE COMPRISING A CYLINDER-PLUNGER ASSEMBLY OPERABLE ALTERNATELY TO DISCHARGE THEREFROM AND SUCH THEREINTO A LIQUID MEDIUM, A VALVE BOX INCLUDING THEREIN A CHAMBER CONNECTED TO A SUCTION INLET AND A DISCHARGE OUTLET, SAID VALVE BOX HAVING FIRST VALVE AND A DISCHARGE OUTLET, SAID SUCTION INLET AND SAID CHAMBER SO AS TO BE CLOSED UPON INCREASE OF THE PRESSURE WITHIN SAID CHAMBER AND OPENED UPON REDUCTION OF THE PRESSURE WITHIN THE SAME AND SECOND VALVE MEANS ARRANGED BETWEEN SAID CHAMBER AND SAID DISCHARGE OUTLET SO AS TO BE OPENED UPON INCREASE OF THE PRESSURE WITHIN SAID CHAMBER AND CLOSED UPON REDUCATION OF THE PRESSURE WITHIN THE SAME, A VERTICALLY ARRANGED TANK COMMUNICATING AT THE UPPER END PORTION THEREOF WITH THE INTERIOR OF SAID CYLINDER-PLUNGER ASSEMBLY AND AT THE LOWER END PORTION THEREOF WITH SAID CHAMBER, BOTH SAID VALVE BOX AND THE LOWER HALF PORTION OF SAID TANK BEING FILLED WITH THE SLURRY TO BE JUMPED AND BOTH SAID CYLINDER-PLUNGER ASSEMBLY AND THE UPPER HALF PORTION OF SAID TANK BEING FILLED WITH SAID LIQUID MEDIUM WHICH HAS A SPECIFIC GRAVITY LOWER THAN THAT OF SAID SLURRY AND IS OF SUCH NATURE THAT IT DOES NOT MIX WITH, DISSOLVE INTO, OR REACT WITH THE SLURRY, SO THAT SAID LIQUID MEDIUM AND SAID SLURRY FORM THEREBETWEEN A HORIZONTAL BOUNDARY PLANE WITHIN SAID TANK, AND STABILIZING MEANS DISPOSED WITHIN SAID TANK AT THE POSITION OF SAID BOUNDARY PLANE TO PREVENT DISTURBANCE OF SAID BOUNDARY PLANE.
Claim 2
Independent Claim
247 words
AN APPARATUS FOR PUMPING SLURRY OR THE LIKE COMPRISING A CYLINDER-PLUNGER ASSEMBLY OPERABLE ALTERNATELY TO DISCHARGE THEREFROM AND SUCH THEREINTO A LIQUID MEDIUM, A VALVE BOX INCLUDING THEREIN A CHAMBER CONNECTED TO A SUCTION INLET AND A DISCHARGE OUTLET, SAID VALVE BOX HAVING FIRST VALVE AND A DISCHARGE OUTLET, SAID SUCTION INLET AND SAID CHAMBER SO AS TO BE CLOSED UPON INCREASE OF THE PRESSURE WITHIN SAID CHAMBER AND OPENED UPON REDUCTION OF THE PRESSURE WITHIN THE SAME AND SECOND VALVE MEANS ARRANGED BETWEEN SAID CHAMBER AND SAID DISCHARGE OUTLET SO AS TO BE OPENED UPON INCREASE OF THE PRESSURE WITHIN SAID CHAMBER AND CLOSED UPON REDUCATION OF THE PRESSURE WITHIN THE SAME, A VERTICALLY ARRANGED TANK COMMUNICATING AT THE UPPER END PORTION THEREOF WITH THE INTERIOR OF SAID CYLINDER-PLUNGER ASSEMBLY AND AT THE LOWER END PORTION THEREOF WITH SAID CHAMBER, BOTH SAID VALVE BOX AND THE LOWER HALF PORTION OF SAID TANK BEING FILLED WITH THE SLURRY TO BE JUMPED AND BOTH SAID CYLINDER-PLUNGER ASSEMBLY AND THE UPPER HALF PORTION OF SAID TANK BEING FILLED WITH SAID LIQUID MEDIUM WHICH HAS A SPECIFIC GRAVITY LOWER THAN THAT OF SAID SLURRY AND IS OF SUCH NATURE THAT IT DOES NOT MIX WITH, DISSOLVE INTO, OR REACT WITH THE SLURRY, SO THAT SAID LIQUID MEDIUM AND SAID SLURRY FORM THEREBETWEEN A HORIZONTAL BOUNDARY PLANE WITHIN SAID TANK, AND STABILIZING MEANS DISPOSED WITHIN SAID TANK AT THE POSITION OF SAID BOUNDARY PLANE TO PREVENT DISTURBANCE OF SAID BOUNDARY PLANE.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |