EP1342917A1 - Pump for aggressive liquids - Google Patents
Pump for aggressive liquids Download PDFInfo
- Publication number
- EP1342917A1 EP1342917A1 EP03010547A EP03010547A EP1342917A1 EP 1342917 A1 EP1342917 A1 EP 1342917A1 EP 03010547 A EP03010547 A EP 03010547A EP 03010547 A EP03010547 A EP 03010547A EP 1342917 A1 EP1342917 A1 EP 1342917A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- piston metering
- metering pumps
- valve
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0038—Piston machines or pumps characterised by having positively-driven valving the distribution member forming a single inlet for a plurality of pumping chambers or a multiple discharge for one single pumping chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/04—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Definitions
- the invention relates to a pumping device for aggressive liquids, in particular liquid metals, e.g. B. lead or aluminum with several piston metering pumps.
- Piston metering pumps comprise a pump housing with a pump base, the pump base having at least one valve which is connected to a plurality of channels arranged in the pump base.
- a piston metering pump for aggressive liquids is known from US-A 5,014,219; however, the promotion of liquid metals is not described here.
- a pump device is therefore proposed, as follows from the features of claim 1.
- the pump device is characterized by a plurality of piston metering pumps.
- the parallel arrangement of several such piston metering pumps has the advantage that a continuous delivery of the Medium is possible because the pistons work alternately, ie while one piston is sucking in, the other is ejecting.
- this has the advantage that the temperature in the casting mold remains essentially constant during the casting process, since a continuous flow of the casting medium is ensured.
- the piston metering pumps of such a pump device advantageously each have a separate drive in order to be able to individually control the inflow of the casting medium.
- the piston metering pumps of the pump device have a common housing, the housing having a common pressure channel for the piston metering pumps. This means that in the case of two parallel piston metering pumps in a pump device, the piston metering pumps each have a separate feed for the casting medium to be pumped, but a single outlet for the pumped medium. In particular, this also ensures the continuous delivery of the casting medium into the mold.
- the piston pump designated as a whole by 1
- the piston pump shows the cylinder 2 and the piston designated as 3, which is arranged in the cylinder.
- the bottom of the cylinder is designated 10 in total.
- the base 10 consists of the three disk-shaped segments 20, 30 and 40, which are connected to one another by screws 70, as can be seen, for example, from FIG.
- the disk-shaped segment 20 has a bore 21, with which the pump base is connected to the interior of the cylinder 2. Furthermore, the segment 20 has a bore 22 which opens into the valve space designated 25, 35. The valve chamber 25, 35 has the valve seat 23 in the region of the outlet of the bore 22.
- the disc-shaped segment 30 has a horizontally running groove 31 which adjoins the bore 21 of the disc-shaped segment 20 and which likewise opens into the valve chamber 25, 35 , A bore 32, which has the valve seat 33, in turn adjoins the valve chamber 25, 35 at the bottom.
- the bore 32 is followed by a again horizontally extending groove 41 in the disk-shaped segment 40, which ends in the pressure pipe designated 50.
- This pressure tube 50 is T-shaped in its end arranged on the pump base (at 55), as a result of which it is received in a form-fitting manner in the region of the segments 20 and 30 by a corresponding recess 37 in the segment 30 and 27 in the segment 20.
- the pressure pipe 50 is advantageously designed to be heatable in order to be able to bring the melt into the casting mold without lowering the temperature.
- valve 60 In the area of the valve chamber 25, 35 there is the valve, designated 60, with the valve body 61 and the valve rod 62.
- the valve body 61 works together with the valve seats 23 and 33.
- the piston metering pump can be used as a submersible pump, with the inlet through the annular gap between the bore 22 and the valve rod 62 takes place in the valve housing 25, 35.
- the bore 32 In the case of the inlet, the bore 32 is blocked by the valve body 61 through the valve body 61.
- the liquid passes through the bore 22, the channel 31 and the bore 21 into the cylinder 2.
- the piston 3 moves downward appropriately, the liquid passes through the bore 21 when the valve body rests on the upper valve seat 23 , The channel 31, the bore 32 and the channel 41 passed into the pressure pipe 50.
- the disk-shaped segments 20, 30, 40 and also the pressure tube 50 are preferably made of a ceramic or else coated accordingly in order to counteract the wear caused by the liquid metal.
- FIG. 5 a pump device with two piston metering pumps is shown.
- the arrangement of the two piston metering pumps 1 in the pump device is parallel, but each individual piston pump designated by 1 has a separate drive (not shown).
- the pump base 100 of the pump device consists of the six segments 110, 120, 130, 140, 150 and 160.
- the disk-shaped segments 110 to 160 are held by screws 70, as can be seen from the sectional views according to FIGS. 6 to 8.
- the disk-shaped segment 110 has two bores 111, with which the pump base is connected to the respective interior of the cylinder 2. Furthermore, the segment 110 has two bores 112 which open into the valve space designated 135.
- the valve chamber 135 shows the valve seat 123 in the area of the exit of the bore 112.
- the disk-shaped segment 130 has a horizontally running groove 131 which is in connection with the bore 111.
- There is a valve 180 for each of the two piston metering pumps provided with the valve body 181 and the valve rod 182. The valve body cooperates with the respective valve seats 123, 142.
- the disk-shaped segment 150 shows a long groove 190 which is finally connected to the pressure pipe 50. Finally, the disk-shaped segment 160 forms the end of the base 100.
- the functioning of this pump device is essentially the same as that of FIGS. 1-4, so that there is no need to go into this in detail.
Abstract
Description
Die Erfindung betrifft eine Pumpeinrichtung für aggressive Flüssigkeiten, insbesondere flüssige Metalle, z. B. Blei oder Aluminium mit mehreren Kolben-Dosierpumpen. Kolben-Dosierpumpen umfassen ein Pumpengehäuse mit einem Pumpenboden, wobei der Pumpenboden mindestens ein Ventil aufweist, das mit mehreren in dem Pumpenboden angeordneten Kanälen in Verbindung steht.The invention relates to a pumping device for aggressive liquids, in particular liquid metals, e.g. B. lead or aluminum with several piston metering pumps. Piston metering pumps comprise a pump housing with a pump base, the pump base having at least one valve which is connected to a plurality of channels arranged in the pump base.
Aus der US-A 5,014,219 ist eine Kolben-Dosierpumpe für aggressive Flüssigkeiten bekannt; die Förderung flüssiger Metalle ist hierin jedoch nicht beschrieben.A piston metering pump for aggressive liquids is known from US-A 5,014,219; however, the promotion of liquid metals is not described here.
Es ist bekannt, dass flüssige Metalle, und hier insbesondere flüssiges Blei und flüssiges Aluminium, äußerst aggressiv sind. Aus der EP 610708 ist daher bereits bekannt, eine Kolben-Dosierpumpe bereitzustellen, bei der Kolben und Zylinder aus einem keramischen Material, z. B. Siliziumnitrit, hergestellt sind. Der Verschleiß einer derartigen Pumpe konnte gegenüber herkömmlichen Pumpen durch den Einsatz solcher keramischer Materialien erheblich reduziert werden. D. h., dass die eigentliche Pumpe mit Kolben und Zylinder durchaus eine Verschleißfestigkeit aufweist, die annehmbar ist.It is known that liquid metals, and here in particular liquid lead and liquid aluminum, are extremely aggressive. From EP 610708 it is therefore already known to provide a piston metering pump in which pistons and cylinders made of a ceramic material, for. B. silicon nitride are made. The wear of such a pump could be considerably reduced compared to conventional pumps by using such ceramic materials. This means that the actual pump with piston and cylinder has a wear resistance that is acceptable.
Problematisch bei einer derartigen Pumpe ist jedoch, dass hiermit eine kontinuierliche Förderung der z. B. flüssigen Schmelze nicht möglich ist.The problem with such a pump, however, is that a continuous promotion of the z. B. liquid melt is not possible.
Erfindungsgemäß wird infolgedessen eine Pumpeinrichtung vorgeschlagen, wie sie sich aus den Merkmalen des Anspruches 1 ergibt.According to the invention, a pump device is therefore proposed, as follows from the features of claim 1.
Insbesondere zeichnet sich die Pumpeinrichtung durch mehrere Kolben-Dosierpumpen aus. Insbesondere die Parallelanordnung mehrerer derartiger Kolben-Dosierpumpen hat den Vorteil, dass eine kontinuierliche Förderung des Mediums möglich ist, da die Kolben im Wechseltakt arbeiten, d. h. während der eine Kolben ansaugt, stößt der andere aus. Bei der Beschickung von Gießformen hat dies den Vorteil, dass die Temperatur in der Gießform während des Gießvorganges im Wesentlichen konstant bleibt, da ein kontinuierlicher Fluss des Gießmediums gewährleistet ist. Infolgedessen ergibt sich auch keine Temperaturabsenkung während des Gießvorganges mit der damit einhergehenden Oxydation des Gießmediums. D. h. es erfolgt eine im Wesentlichen schonende Behandlung der Schmelze, was sich durchaus vorteilhaft in Bezug auf die Qualität des Endproduktes auswirkt.In particular, the pump device is characterized by a plurality of piston metering pumps. In particular, the parallel arrangement of several such piston metering pumps has the advantage that a continuous delivery of the Medium is possible because the pistons work alternately, ie while one piston is sucking in, the other is ejecting. When feeding casting molds, this has the advantage that the temperature in the casting mold remains essentially constant during the casting process, since a continuous flow of the casting medium is ensured. As a result, there is also no temperature drop during the casting process with the associated oxidation of the casting medium. I.e. the melt is treated essentially gently, which has an advantageous effect on the quality of the end product.
Vorteilhaft weisen die Kolben-Dosierpumpen einer derartigen Pumpeinrichtung jeweils einen gesonderten Antrieb auf, um den Zufluss des Gießmediums einzeln steuern zu können. Insbesondere auch zur Vermeidung von übermäßigen Wärmeverlusten ist vorgesehen, dass die Kolben-Dosierpumpen der Pumpeinrichtung ein gemeinsames Gehäuse aufweisen, wobei das Gehäuse einen gemeinsamen Druckkanal für die Kolben-Dosierpumpen aufweist. D. h., dass bei zwei parallelen Kolben-Dosierpumpen in einer Pumpeinrichtung die Kolben-Dosierpumpen jeweils eine gesonderte Zuführung für das zu pumpende Gießmedium aufweisen, jedoch einen einzigen Ausgang für das geförderte Medium. Insbesondere auch hierdurch wird die kontinuierliche Förderung des Gießmediums in die Form gewährleistet.The piston metering pumps of such a pump device advantageously each have a separate drive in order to be able to individually control the inflow of the casting medium. In particular, also to avoid excessive heat losses, it is provided that the piston metering pumps of the pump device have a common housing, the housing having a common pressure channel for the piston metering pumps. This means that in the case of two parallel piston metering pumps in a pump device, the piston metering pumps each have a separate feed for the casting medium to be pumped, but a single outlet for the pumped medium. In particular, this also ensures the continuous delivery of the casting medium into the mold.
Anhand der Zeichnungen wird die Erfindung nachstehend beispielhaft näher erläutert .
- Figur 1
- zeigt eine Kolben-Dosierpumpe in einer Seitenansicht schematisch im Schnitt;
Figur 2- zeigt einen Schnitt gemäß der Linie II/II aus Figur 1;
Figur 3- zeigt einen Schnitt gemäß der Linie III/III aus Figur 1;
- Figur 4
- zeigt einen Schnitt gemäß der Linie IV/IV aus Figur 1;
- Figur 5
- zeigt eine parallele Anordnung zweier Kolben-Dosierpumpen in einem gemeinsamen Gehäuse als Pumpeinrichtung im Schnitt;
- Figuren 6-8
- zeigen Schnitte des Bodens gemäß der Pumpeinrichtung aus Figur 5
- Figure 1
- shows a piston metering pump in a side view schematically in section;
- Figure 2
- shows a section along the line II / II of Figure 1;
- Figure 3
- shows a section along the line III / III of Figure 1;
- Figure 4
- shows a section along the line IV / IV of Figure 1;
- Figure 5
- shows a parallel arrangement of two piston metering pumps in a common housing as a pump device in section;
- Figures 6-8
- show sections of the floor according to the pumping device from FIG. 5
Wie aus Figur 1 erkennbar, zeigt die insgesamt mit 1 bezeichnete Kolbenpumpe den Zylinder 2 und den im Zylinder angeordneten mit 3 bezeichneten Kolben. Der Boden des Zylinders ist insgesamt mit 10 bezeichnet. Der Boden 10 besteht aus den drei scheibenförmigen Segmenten 20, 30 und 40, die untereinander durch Schrauben 70 verbunden sind, wie sich dies beispielsweise aus Figur 2 ergibt.As can be seen from FIG. 1, the piston pump, designated as a whole by 1, shows the
Das scheibenförmige Segment 20 zeigt eine Bohrung 21 auf, mit der der Pumpenboden mit dem Innenraum des Zylinders 2 in Verbindung steht. Des weiteren besitzt das Segment 20 eine Bohrung 22, die in den mit 25, 35 bezeichneten Ventilraum mündet. Der Ventilraum 25, 35 besitzt im Bereich des Ausgangs der Bohrung 22 den Ventilsitz 23. Das scheibenförmige Segment 30 zeigt eine horizontal verlaufende Nut 31, die sich an die Bohrung 21 des scheibenförmigen Segments 20 anschließt, und die ebenfalls in den Ventilraum 25, 35 mündet. An den Ventilraum 25, 35 schließt sich nach unten wiederum eine Bohrung 32 an, die den Ventilsitz 33 aufweist. An die Bohrung 32 schließt sich eine wiederum horizontal verlaufende Nut 41 im scheibenförmigen Segment 40 an, die in dem mit 50 bezeichneten Druckrohr endet. Dieses Druckrohr 50 ist in seinem am Pumpenboden angeordneten Ende T-förmig (bei 55) ausgebildet, wodurch es im Bereich der Segmente 20 und 30 durch eine entsprechende Ausnehmung 37 in dem Segment 30 sowie 27 in dem Segment 20 formschlüssig aufgenommen ist. Vorteilhaft ist das Druckrohr 50 beheizbar ausgebildet, um die Schmelze ohne Temperaturerniedrigung in die Gießform bringen zu können.The disk-
Im Bereich des Ventilraumes 25, 35 befindet sich das mit 60 bezeichnete Ventil mit dem Ventilkörper 61 und der Ventilstange 62. Der Ventilkörper 61 arbeitet mit den Ventilsitzen 23 und 33 zusammen.
Die Kolben-Dosierpumpe ist als Tauchpumpe einsetzbar, wobei der Einlass durch den ringförmigen Spalt zwischen der Bohrung 22 und der Ventilstange 62 in das Ventilgehäuse 25, 35 stattfindet. Im Falle des Einlasses wird durch den Ventilkörper 61 die Bohrung 32 durch den Ventilkörper 61 abgesperrt. D. h., die Flüssigkeit gelangt durch die Bohrung 22, den Kanal 31 und die Bohrung 21 in den Zylinder 2. Bei entsprechender Abwärtsbewegung des Kolbens 3 wird die Flüssigkeit dann, wenn der Ventilkörper an dem oberen Ventilsitz 23 anliegt, durch die Bohrung 21, den Kanal 31, die Bohrung 32 und den Kanal 41 in das Druckrohr 50 geleitet.In the area of the
The piston metering pump can be used as a submersible pump, with the inlet through the annular gap between the
Die scheibenförmigen Segmente 20, 30, 40 und auch das Druckrohr 50 sind vorzugsweise aus einer Keramik hergestellt oder aber entsprechend beschichtet, um dem Verschleiß durch das Flüssigmetall entgegenzuwirken.The disk-
Bei der Darstellung gemäß der Figur 5 und entsprechend den Schnitten gemäß den Figuren 6 bis 8 ist eine Pumpeinrichtung mit zwei Kolben-Dosierpumpen dargestellt. Die Anordnung der beiden Kolben-Dosierpumpen 1 in der Pumpeinrichtung ist parallel, wobei jedoch jede einzelne mit 1 bezeichnete Kolbenpumpe einen gesonderten Antrieb (nicht dargestellt) zeigt. Für die folgende Betrachtung wird in Bezug auf gleiche Teile auf die Ausführungsform einer Kolben-Dosierpumpe gemäß den Figuren 1 bis 4 erwiesen. Lediglich der Boden der Pumpeinrichtung mit den beiden Kolben-Dosierpumpen unterscheidet sich etwas; der Pumpenboden 100 der Pumpeinrichtung besteht aus den sechs Segmenten 110, 120, 130, 140, 150 und 160. Auch hier sind die scheibenförmigen Segmente 110 bis 160 durch Schrauben 70 gehalten, wie sich dies aus den Schnittdarstellungen gemäß den Figuren 6 bis 8 ergibt. Das scheibenförmige Segment 110 zeigt zwei Bohrungen 111 auf, mit der der Pumpenboden mit dem jeweiligen Innenraum des Zylinders 2 in Verbindung steht. Des Weiteren besitzt das Segment 110 zwei Bohrungen 112, die in den mit 135 bezeichneten Ventilraum münden. Der Ventilraum 135 zeigt im Bereich des Ausgangs der Bohrung 112 den Ventilsitz 123. Das scheibenförmige Segment 130 weist eine horizontal verlaufend Nut 131 auf, die in Verbindung mit der Bohrung 111 steht. Im Bereich des scheibenförmigen Segmentes 140 befindet sich wiederum jeweils eine Bohrung 141 mit einem entsprechenden Ventilsitz 142. Für die beiden Kolben-Dosierpumpen ist jeweils ein Ventil 180 vorgesehen mit dem Ventilkörper 181 und der Ventilstange 182. Der Ventilkörper arbeitet hierbei mit den jeweiligen Ventilsitzen 123, 142 zusammen. Das scheibenförmige Segment 150 zeigt eine lang verlaufende Nut 190, die schlussendlich mit dem Druckrohr 50 in Verbindung steht. Schlussendlich bildet das scheibenförmige Segment 160 den Abschluss des Bodens 100. Die Funktionsweise dieser Pumpeinrichtung ist im Wesentlichen gleich der der Figur 1 - 4, so dass hierauf im einzelnen nicht mehr eingegangen werden muss.In the illustration according to FIG. 5 and corresponding to the sections according to FIGS. 6 to 8, a pump device with two piston metering pumps is shown. The arrangement of the two piston metering pumps 1 in the pump device is parallel, but each individual piston pump designated by 1 has a separate drive (not shown). For the following consideration, reference is made to the embodiment of a piston metering pump according to FIGS. 1 to 4 with respect to the same parts. Only the bottom of the pump device with the two piston metering pumps differs somewhat; the
Claims (4)
ein Pumpengehäuse mit einem Pumpenboden (10), wobei der Pumpenboden (10) mindestens ein Ventil (60) aufweist, das mit mehreren im Pumpenboden angeordneten Kanälen in Verbindung steht, wobei der Pumpenboden (10) mehrere scheibenartige Segmente (20, 30, 40) aufweist, wobei die einzelnen Segmente (20, 30, 40) zur Bildung der Kanäle untereinander verbundene Nuten und Bohrungen (21, 22, 31, 41) aufweisen, wobei die Kolben-Dosierpumpen durch ein gemeinsames Druckrohr verbunden sind.Pumping device for aggressive liquids, especially liquid metals, e.g. B. lead or aluminum, with several piston metering pumps, characterized by
a pump housing with a pump base (10), the pump base (10) having at least one valve (60) which is connected to a plurality of channels arranged in the pump base, the pump base (10) having a plurality of disk-like segments (20, 30, 40) The individual segments (20, 30, 40) have mutually connected grooves and bores (21, 22, 31, 41) to form the channels, the piston metering pumps being connected by a common pressure pipe.
dadurch gekennzeichnet
dass die Kolben-Dosierpumpen (1) parallel zueinander angeordnet sind.Pump device according to claim 1,
characterized
that the piston metering pumps (1) are arranged parallel to each other.
dadurch gekennzeichnet,
dass jede Kolben-Dosierpumpe (1) einen gesonderten Antrieb aufweist.Pump device according to claim 2,
characterized,
that each piston metering pump (1) has a separate drive.
dadurch gekennzeichnet,
dass die Kolben-Dosierpumpen (1) der Pumpeinrichtung ein gemeinsames Gehäuse aufweisen.Pump device according to claim 1,
characterized,
that the piston metering pumps (1) of the pump device have a common housing.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29906403 | 1999-04-10 | ||
DE29906403U | 1999-04-10 | ||
DE20001099U DE20001099U1 (en) | 1999-04-10 | 2000-01-22 | Piston metering pump for aggressive liquids |
DE20001099U | 2000-01-22 | ||
EP00926706A EP1171709B1 (en) | 1999-04-10 | 2000-04-10 | Piston metering pump for aggressive liquids |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00926706A Division EP1171709B1 (en) | 1999-04-10 | 2000-04-10 | Piston metering pump for aggressive liquids |
EP00926706.3 Division | 2000-04-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1342917A1 true EP1342917A1 (en) | 2003-09-10 |
EP1342917B1 EP1342917B1 (en) | 2005-11-02 |
Family
ID=8072029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03010547A Expired - Lifetime EP1342917B1 (en) | 1999-04-10 | 2000-04-10 | Pump for aggressive liquids |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1342917B1 (en) |
DE (2) | DE20001099U1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2007759A (en) * | 1977-10-07 | 1979-05-23 | Suisse Horlogerie Rech Lab | Pressure die casting machines |
GB2013776A (en) * | 1977-12-24 | 1979-08-15 | Lucas Industries Ltd | A metering pump |
EP0273692A2 (en) * | 1986-12-30 | 1988-07-06 | Butterworth Jetting Systems, Inc. | A pump head for a high pressure pump |
US5014219A (en) | 1988-05-06 | 1991-05-07 | White James A | Mask controled neural networks |
US5013219A (en) * | 1989-02-09 | 1991-05-07 | The University Of Delaware | Positive displacement piston pump |
US5181551A (en) * | 1991-09-25 | 1993-01-26 | Electrovert Ltd. | Double acting cylinder for filling dies with molten metal |
JPH0539775A (en) * | 1991-08-05 | 1993-02-19 | Kubota Corp | Ceramics pump for molten metal of non-ferrous metal |
EP0610708A1 (en) | 1993-02-09 | 1994-08-17 | MAUCHER, Eberhard | Dosing pump |
-
2000
- 2000-01-22 DE DE20001099U patent/DE20001099U1/en not_active Expired - Lifetime
- 2000-04-10 EP EP03010547A patent/EP1342917B1/en not_active Expired - Lifetime
- 2000-04-10 DE DE50004501T patent/DE50004501D1/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2007759A (en) * | 1977-10-07 | 1979-05-23 | Suisse Horlogerie Rech Lab | Pressure die casting machines |
GB2013776A (en) * | 1977-12-24 | 1979-08-15 | Lucas Industries Ltd | A metering pump |
EP0273692A2 (en) * | 1986-12-30 | 1988-07-06 | Butterworth Jetting Systems, Inc. | A pump head for a high pressure pump |
US5014219A (en) | 1988-05-06 | 1991-05-07 | White James A | Mask controled neural networks |
US5013219A (en) * | 1989-02-09 | 1991-05-07 | The University Of Delaware | Positive displacement piston pump |
JPH0539775A (en) * | 1991-08-05 | 1993-02-19 | Kubota Corp | Ceramics pump for molten metal of non-ferrous metal |
US5181551A (en) * | 1991-09-25 | 1993-01-26 | Electrovert Ltd. | Double acting cylinder for filling dies with molten metal |
EP0610708A1 (en) | 1993-02-09 | 1994-08-17 | MAUCHER, Eberhard | Dosing pump |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 017, no. 330 (M - 1434) 23 June 1993 (1993-06-23) * |
Also Published As
Publication number | Publication date |
---|---|
DE50004501D1 (en) | 2003-12-24 |
DE20001099U1 (en) | 2000-08-17 |
EP1342917B1 (en) | 2005-11-02 |
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Legal Events
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