Slurry pump arrangement
Abstract
Abstract A RECIPROCATING DUPLEX SLURRY PUMP IS EQUIPPED WITH A FOUR-WAY VALVE FOR ALTERNATINGLY FEEDING CONCRETE MIXTURE TO TWO CYLINDERS ARRANGED IN A COMMON HORIZONTAL PLANE WHOSE PISTONS OPERATE IN PHASE OPPOSITION, AND FOR DISCHARGING THE MIXTURE UNDER PRESSURE. THE VALVE HOUSING WHICH CONNECTS THE OPEN FRONT ENDS OF THE CYLINDERS INCLUDES A CENTRAL VALVE BODY CONNECTED WITH THE CYLINDER ENDS BY PIVOTALLY MOUNTED WIDE AND SHORT ELBOWS. CONCRETE MIXTURE ENTERS THE VALVE BODY FROM ABOVE AND IS DISCHARGED DOWNWARDLY AS DIRECTED BY A VALVE PLATE PIVOTALLY MOUNTED IN THE VALVE BODY. THE VALVE ARRANGEMENT PERMITS THE PUMP ELEMENTS TO BE MOUNTED CLOSELY ADJACENT EACH OTHER TO SHORTEN THE PATH OF CONCRETE MIXTURE AND TO MINIMIZE CLOGGING BY HARDENING CONCRETE.
Inventors
- 👤 Karl Schlecht
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |