US4604037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry pumping apparatus for solid-liquid separation
Assignee: Individual
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Filing: 1984-12-17
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Granted: 1986-08-05
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Expires: 2004-12-17
Abstract
Abstract The present invention relates to a slurry pumping apparatus for solid-liquid separation. More specifically, the invention provides, in a slurry pumping apparatus arranged such that a diaphragm pump connected to an oil tank is actuated to deliver a hydraulic oil when a predetermined amount of slurry is supplied from a slurry tank to a solid-fluid separator, such as a filter press, which obtains cake from slurry, a slurry pumping apparatus for solid-liquid separation in which the diaphragm pump has its hydraulic pressure chamber connected to a supply/discharge pump through a changeover operation of a change-over valve such that the slurry is pumped to the solid-liquid separator by the operation of the diaphragm pump.
Inventors
- 👤 Takesi Hoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:18
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; B; B01; B01D; B01D25/00; B01D25/30; B01D25/302
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
In a slurry pumping apparatus including a hydraulic pressure source, and a diaphragm pump, interposed between a solid-liquid separator and a slurry tank, and connected to an oil tank, the diaphragm pump having a hydraulic pressure chamber connected to a supply/discharge pump through changeover valve means, the improvement comprising: said supply/discharge pump comprising a fluid supply pump and a fluid discharge pump which are mechanically connected together such as to be operable as one unit, said fluid discharge pump having its suction/discharge chamber connected through a suction/discharge passage to a first changeover valve communicating with said oil tank and the hydraulic pressure chamber of said diaphragm pump, said fluid supply pump having a first pressurizing chamber connected to said oil tank through a second changeover valve, and a second pressurizing chamber connected to said oil tank and to the hydraulic pressure chamber of said diaphragm pump.
Claim 2
Dependent Claim
146 words
In a slurry pumping apparatus including a hydraulic pressure source, and a diaphragm pump, interposed between a solid-liquid separator and a slurry tank, and connected to an oil tank, the diaphragm pump having a hydraulic pressure chamber connected to a supply/discharge pump through changeover valve means, the improvement comprising: said supply/discharge pump comprising a fluid supply pump and a fluid discharge pump which are mechanically connected together such as to be operable as one unit, said fluid discharge pump having its suction/discharge chamber connected through a suction/discharge passage to a first changeover valve communicating with said oil tank and the hydraulic pressure chamber of said diaphragm pump, said fluid supply pump having a first pressurizing chamber connected to said oil tank through a second changeover valve, and a second pressurizing chamber connected to said oil tank and to the hydraulic pressure chamber of said diaphragm pump.
Claim 3
Dependent Claim
20 words
The improvement according to claim 1, wherein said fluid discharge pump and said fluid supply pump are connected in series.
Claim 4
Dependent Claim
20 words
The improvement according to claim 1, wherein said fluid discharge pump and said fluid supply pump are connected in parallel.
Claim 5
Dependent Claim
172 words
In a slurry pumping apparatus including a hydraulic pressure source, and a diaphragm pump, interposed between a solid-liquid separator and a slurry tank, and connected to an oil tank, said diaphragm pump having a hydraulic pressure chamber connected to a supply/discharge pump through changeover valve means, a slurry pumping apparatus for solid-liquid separation comprising: said supply/discharge pump being composed of a fluid supply pump and a fluid discharge pump which are mechanically connected together such as to be operable as one unit, said fluid discharge pump having its suction/discharge chamber connected through a suction/discharge passage to a first changeover valve communicating with said oil tank and the hydraulic pressure chamber of said diaphragm pump, said fluid supply pump having a first pressurizing chamber connected to said oil tank through a second changeover valve, and a second pressurizing chamber connected to said oil tank and to the hydraulic pressure chamber of said diaphragm pump, and the hydraulic pressure chamber of said diaphragm pump being provided therein with a support net for a diaphragm.
Claim 6
Dependent Claim
172 words
In a slurry pumping apparatus including a hydraulic pressure source, and a diaphragm pump, interposed between a solid-liquid separator and a slurry tank, and connected to an oil tank, said diaphragm pump having a hydraulic pressure chamber connected to a supply/discharge pump through changeover valve means, a slurry pumping apparatus for solid-liquid separation comprising: said supply/discharge pump being composed of a fluid supply pump and a fluid discharge pump which are mechanically connected together such as to be operable as one unit, said fluid discharge pump having its suction/discharge chamber connected through a suction/discharge passage to a first changeover valve communicating with said oil tank and the hydraulic pressure chamber of said diaphragm pump, said fluid supply pump having a first pressurizing chamber connected to said oil tank through a second changeover valve, and a second pressurizing chamber connected to said oil tank and to the hydraulic pressure chamber of said diaphragm pump, and the hydraulic pressure chamber of said diaphragm pump being provided therein with a support net for a diaphragm.
Claim 7
Dependent Claim
25 words
A slurry pumping apparatus for solid-liquid separation according to claim 4, wherein said support net is adapted to advance and retract in the axial direction.
Claim 8
Dependent Claim
25 words
A slurry pumping apparatus for solid-liquid separation according to claim 5, wherein said support net is engaged at its proximal portion thereof with said diaphragm.
Claim 9
Dependent Claim
29 words
A slurry pumping apparatus for solid-liquid separation according to claim 5, wherein said support net is attached to a sleeve which slides on a guide secured to a casing.
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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |