EP1454062A1 - Feed pump for fluidic media - Google Patents

Feed pump for fluidic media

Info

Publication number
EP1454062A1
EP1454062A1 EP02792638A EP02792638A EP1454062A1 EP 1454062 A1 EP1454062 A1 EP 1454062A1 EP 02792638 A EP02792638 A EP 02792638A EP 02792638 A EP02792638 A EP 02792638A EP 1454062 A1 EP1454062 A1 EP 1454062A1
Authority
EP
European Patent Office
Prior art keywords
channel
channels
length
pump
housing
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
Application number
EP02792638A
Other languages
German (de)
French (fr)
Other versions
EP1454062B1 (en
Inventor
Georg Gillert
Dirk Henningsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG
Original Assignee
Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE10202618A external-priority patent/DE10202618C1/en
Application filed by Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG filed Critical Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG
Publication of EP1454062A1 publication Critical patent/EP1454062A1/en
Application granted granted Critical
Publication of EP1454062B1 publication Critical patent/EP1454062B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning

Definitions

  • the invention relates to a feed pump for fluid media according to the preamble of the main claim.
  • EP 0 061 630 A1 describes a gear pump for metering
  • the arrangement is provided with a rinsing channel system for rinsing gaps between the gears, the shafts and the pump housing before a color change, the rinsing channel system having at least one rinsing chamber and a closable inlet for a detergent and a plurality of rinsing channels connected to the rinsing chamber.
  • the suction of the medium used as a lubricant is caused by the differential pressure between the suction side and the pressure side in the product channel and the lubricant is released into the product channel on the suction side of the pump after lubrication of the plain bearings.
  • the lubricant is thus pressed into the space of the slide bearings by the pump pressure, on the one hand, and is sucked out of the slide bearings by the lower pressure prevailing on the suction side.
  • the invention has for its object to provide an arrangement in which this removal of the pump and the cleaning of the plain bearings is no longer necessary, but the cleaning should be done by the medium itself, and it should be controllable from the outside whether this cleaning is complete took place.
  • This object on which the invention is based is achieved by the teaching of the main claim.
  • a control channel is additionally provided, which is arranged on the suction side of the pump for both slide bearings and with the connecting channels in connection, which are intended for the supply of the medium lubricating the slide bearings and which open on the suction side of the pump.
  • Valve tappets are arranged in these connecting channels, which have a constriction and which can be adjusted from a position in which they do not hinder the return of the conveying medium lubricating the slide bearings to the suction side of the product channel, into a position in which the return of the
  • Lubricating connection channel is closed. Not only is the connecting channel closed, but the valve tappet has a length in this area which corresponds to the length of the connecting channel in order to avoid dead zones. Furthermore, the valve tappet has a constriction which, when the connecting channel is closed by adjusting the tappet, enables a passage from the channel which connects to the slide bearing to a control channel, so that now pumped medium flows from the pump through the slide bearing to Control channel is led. It can easily be determined at the discharge end of the control channel whether the plain bearings are completely cleaned when changing materials or whether a product mixture is still being dispensed. As soon as the plain bearings are completely cleaned, the valve lifters are returned to their starting position, and the plain bearings are now lubricated in the previously usual manner, ie the medium is returned through the plain bearings to the suction side of the product channel.
  • the arrangement described above can also be used to carry out product tests at the end of the control channels, for example in order to be able to take samples which are then further examined and make the quality of the goods conveyed by the pump controllable.
  • the constriction has a length that corresponds to the distance of the mouth of the control channel in the housing cover from the mouth of the connecting channel on the outside of the pump housing.
  • Fig. 1 shows the arrangement according to the invention with the connecting channel open and in
  • Fig. 2 shows the position of the valve lifter, if one now
  • 1 denotes a pump housing, in which a displacement body 12, for example a gearwheel, is arranged, which is effective within a product channel 7.
  • the product channel and thus the displacement body 12 has a suction side S and a pressure side D.
  • the displacer body 12 is driven by a drive shaft 5 and is mounted in slide bearings 8 and 9.
  • connecting channels 10 and 11 are provided, through which - as indicated by the arrows in FIG. 1 - the conveyed in the product channel Pumped medium after flowing through the slide bearings 8 and 9 back to the suction side of the product channel 7 is guided.
  • control channels 14 and 15 are provided, which are arranged in housing covers 2 and 3. Furthermore, in the
  • Housing covers 2 and 3 aligned with the connecting bores 10 and 11 bores 16 and 17 are provided which accommodate the valve lifters 18 and 19.
  • These valve tappets have constrictions 20 and 21, the length of the valve tappet between its end on the product channel side and the constriction being dimensioned such that this length corresponds to the length of the connecting channels 10 and 11 in the pump housing 1.
  • each valve tappet 18 or 19 is adjusted, as can be seen in FIG. 2, in such a way that the end on the product channel side adjoining the constriction 20 or 21 closes the entire connecting bore 10 and 11.
  • the conveyed medium conveyed in the product channel 7 can now, as indicated by the arrows in FIG. 2, via the area of the constriction 20, 21 to the control channel 14 or
  • the medium flowing through the product channel 7 after a product change therefore cleans the slide bearings itself, and at the discharge end of the control channels 14 and 15 it can be determined when completely clean conveying medium which corresponds to the product channel 7 emerges, so that the valve lifters 18 and 19 can be put back into the position shown in Fig. 1 and now normal funding can take place again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Lubricants (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

The invention relates to a feed pump for fluidic media, comprising a displacement body that is mounted in a pump housing and equipped with slide bearings and connecting channels that connect the slide bearings to the produce channel on the suction side for recirculating the fed medium that lubricates the slide bearings. The connecting channels are linked to control channels that lead to the exterior and guide channels are provided in the extension of the connecting channels in the housing of the cover. Said guide channels accommodate the valve plungers, each of which has a constriction. The section of the valve plunger lying adjacent to the product channel has a length and a diameter, which correspond to the length and diameter of the connecting channel.

Description

"Förderpumpe für fluide Medien""Feed pump for fluid media"
Die Erfindung bezieht sich auf eine Förderpumpe für fluide Medien gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a feed pump for fluid media according to the preamble of the main claim.
In der EP 0 061 630 A1 wird eine Zahnradpumpe zum dosiertenEP 0 061 630 A1 describes a gear pump for metering
Fördern von Farblacken beschrieben, die mit einem Pumpeneinlaß und einem Pumpenauslaß sowie mit zwei ineinander kämmenden Zahnrädern versehen ist, welche durch eine angetriebene Antriebswelle und eine feststehende Lagerwelle innerhalb eines Pumpengehäuses drehbar gelagert sind. Diese bekannteConveying colored paints described, which is provided with a pump inlet and a pump outlet and with two intermeshing gears, which are rotatably supported by a driven drive shaft and a fixed bearing shaft within a pump housing. This well-known
Anordnung ist mit einem Spülkanalsystem zum Spülen von Spalten zwischen den Zahnrädern, den Wellen und dem Pumpengehäuse vor einem Farbwechsel versehen, wobei das Spülkanalsystem zumindest eine Spülkammer und einen verschließbaren Zulauf für ein Spülmittel und mehrere mit der Spülkammer verbundene Spülkanäle aufweist.The arrangement is provided with a rinsing channel system for rinsing gaps between the gears, the shafts and the pump housing before a color change, the rinsing channel system having at least one rinsing chamber and a closable inlet for a detergent and a plurality of rinsing channels connected to the rinsing chamber.
Hierbei ist es aus der EP 1 164 293 A2 bekanntgeworden, die Spülkanäle im Bereich der Antriebswelle derart anzuordnen, dass das Spülmittel die Lagerspalte der Antriebswelle über die gesamte Lagerbreite der jeweiligen Lagerstellen von außen nach innen zu den Stirnseiten des Zahnrades hin durchströmt.It has become known from EP 1 164 293 A2 to arrange the flushing channels in the area of the drive shaft in such a way that the flushing agent passes the bearing gaps of the drive shaft via the flows through the entire bearing width of the respective bearing points from the outside inwards to the end faces of the gear.
Bei diesen bekannten Anordnungen kommt es immer wieder vor, dass Farbreste nur ungenügend ausgespült werden, so dass es während des Betriebes mehr oder weniger zu Farbvermischungen kommt.In these known arrangements it happens again and again that color residues are only rinsed out insufficiently, so that there is more or less color mixing during operation.
Aus der GB 322 778 ist eine Förderpumpe bekanntgeworden, die als Zahnradpumpe ausgebildet ist und bei der die Schmierung der Gleitlager durch das eigentliche Fördermedium selbst erfolgt.From GB 322 778 a feed pump has become known which is designed as a gear pump and in which the sliding bearings are lubricated by the actual delivery medium itself.
Das Ansaugen des als Schmiermittel dienenden Fördermediums wird durch den Differenzdruck bedingt, der zwischen der Saugseite und der Druckseite im Produktkanal herrscht und das Schmiermittel wird nach Schmierung der Gleitlager in den Produktkanal an der Saugseite der Pumpe abgegeben. Das Schmiermittel wird also einerseits durch den Pumpendruck in den Raum der Gleitlager gepresst, andererseits durch den auf der Saugseite herrschenden, geringeren Druck aus den Gleitlagern herausgesaugt.The suction of the medium used as a lubricant is caused by the differential pressure between the suction side and the pressure side in the product channel and the lubricant is released into the product channel on the suction side of the pump after lubrication of the plain bearings. The lubricant is thus pressed into the space of the slide bearings by the pump pressure, on the one hand, and is sucked out of the slide bearings by the lower pressure prevailing on the suction side.
Erfolgt ein Produktwechsel in der Produktleitung, ist ein Ausbau- en der Förderpumpe erforderlich, um die Gleitlager von dem vorher geförderten Produkt zu reinigen, um zu verhindern, dass eine Produktmischung eintritt. Diese Arbeiten sind aufwendig und zeitraubend.If there is a product change in the product line, it is necessary to remove the feed pump in order to clean the slide bearing from the product previously conveyed in order to prevent a product mixture from occurring. This work is complex and time consuming.
Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung zu schaffen, bei der dieser Ausbau der Pumpe und das Reinigen der Gleitlager nicht mehr notwendig ist, sondern die Reinigung soll durch das Fördermedium selbst erfolgen, und es soll von außen kontrollierbar sein, ob diese Reinigung vollständig stattge- funden hat. Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelöst.The invention has for its object to provide an arrangement in which this removal of the pump and the cleaning of the plain bearings is no longer necessary, but the cleaning should be done by the medium itself, and it should be controllable from the outside whether this cleaning is complete took place. This object on which the invention is based is achieved by the teaching of the main claim.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen erläutert.Advantageous embodiments of the invention are explained in the subclaims.
Mit anderen Worten ausgedrückt wird vorgeschlagen, dass bei einer Förderpumpe, die als Drehkolbenpumpe oder Zahnrad- pumpe ausgebildet ist und in einem Produktkanal angeordnet ist, zusätzlich ein Kontrollkanal vorgesehen wird, der auf der Saugseite der Pumpe für beide Gleitlager angeordnet ist und der mit den Verbindungskanälen in Verbindung steht, die für die Zuführung des die Gleitlager schmierenden Fördermediums be- stimmt sind und die an der Saugseite der Pumpe münden. In diesen Verbindungskanälen sind Ventilstößel angeordnet, die eine Einschnürung aufweisen und die aus einer Stellung, in der sie die Rückführung des die Gleitlager schmierenden Fördermediums zur Saugseite des Produktkanales nicht behindern, in ei- ne Stellung verstellbar sind, in der dieser der Rückführung desIn other words, it is proposed that in the case of a feed pump, which is designed as a rotary lobe pump or gear pump and is arranged in a product channel, a control channel is additionally provided, which is arranged on the suction side of the pump for both slide bearings and with the connecting channels in connection, which are intended for the supply of the medium lubricating the slide bearings and which open on the suction side of the pump. Valve tappets are arranged in these connecting channels, which have a constriction and which can be adjusted from a position in which they do not hinder the return of the conveying medium lubricating the slide bearings to the suction side of the product channel, into a position in which the return of the
Gleitmittels dienende Verbindungskanal verschlossen ist. Hierbei wird nicht nur der Verbindungskanal verschlossen, sondern der Ventilstößel weist in diesem Bereich eine Länge auf, die der Länge des Verbindungskanales entspricht, um Totzonen zu vermeiden. Weiterhin weist der Ventilstößel eine Einschnürung auf, die, wenn der Verbindungskanal durch Verstellen des Stößels verschlossen ist, einen Durchgang ermöglicht von dem Kanal, der an das Gleitlager anschließt, zu einem Kontrollkanal, so dass nunmehr Fördermedium von der Pumpe durch das Gleitla- ger zum Kontrollkanal geführt wird. Hierbei kann am Abgabeende des Kontrollkanales leicht festgestellt werden, ob die Gleitlager bei einem Materialwechsel vollständig gereinigt sind oder ob noch eine Produktmischung abgegeben wird. Sobald die Gleitlager vollständig gereinigt sind, werden die Ventilstößel wieder in ihre Ausgangsstellung zurückverstellt, und nunmehr erfolgt die Schmierung der Gleitlager in der vorher üblichen Weise, d. h. das Fördermedium wird durch die Gleitlager wieder zu der Saugseite des Produktkanales zurückgeführt.Lubricating connection channel is closed. Not only is the connecting channel closed, but the valve tappet has a length in this area which corresponds to the length of the connecting channel in order to avoid dead zones. Furthermore, the valve tappet has a constriction which, when the connecting channel is closed by adjusting the tappet, enables a passage from the channel which connects to the slide bearing to a control channel, so that now pumped medium flows from the pump through the slide bearing to Control channel is led. It can easily be determined at the discharge end of the control channel whether the plain bearings are completely cleaned when changing materials or whether a product mixture is still being dispensed. As soon as the plain bearings are completely cleaned, the valve lifters are returned to their starting position, and the plain bearings are now lubricated in the previously usual manner, ie the medium is returned through the plain bearings to the suction side of the product channel.
Die vorbeschriebene Anordnung kann auch dazu ausgenutzt werden, um am Ende der Kontrollkanäle Produktprüfungen vorzunehmen, um beispielsweise Proben entnehmen zu können, die dann weiter untersucht werden und die Qualität des durch die Pumpe geförderten Gutes kontrollierbar machen.The arrangement described above can also be used to carry out product tests at the end of the control channels, for example in order to be able to take samples which are then further examined and make the quality of the goods conveyed by the pump controllable.
Gemäß einem weiteren Merkmal der Erfindung weist die Einschnürung eine Länge auf, die der Entfernung der Mündung des Kontrollkanales im Gehäusedeckel von der Mündung des Ver- bindungskanales an der Außenseite des Pumpengehäuses entspricht.According to a further feature of the invention, the constriction has a length that corresponds to the distance of the mouth of the control channel in the housing cover from the mouth of the connecting channel on the outside of the pump housing.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen erläutert. Die Zeichnungen zeigen dabei inAn embodiment of the invention is explained below with reference to the drawings. The drawings show in
Fig. 1 die erfindungsgemäße Anordnung bei geöffnetem Verbindungskanal und inFig. 1 shows the arrangement according to the invention with the connecting channel open and in
Fig. 2 die Stellung der Ventilstößel, wenn nunmehr eineFig. 2 shows the position of the valve lifter, if one now
Verbindung zwischen dem Gleitlager und einemConnection between the plain bearing and a
Kontrollkanal hergestellt ist.Control channel is established.
In den Zeichnungen ist mit 1 ein Pumpengehäuse bezeichnet, in dem ein Verdrängerkörper 12, beispielsweise ein Zahnrad, angeordnet ist, der innerhalb eines Produktkanales 7 wirksam wird. Der Produktkanal und damit der Verdrängerkörper 12 weist eine Saugseite S und eine Druckseite D auf. Der Verdrängerkörper 12 wird von einer Antriebswelle 5 angetrieben und ist in Gleitlagern 8 und 9 gelagert.In the drawings, 1 denotes a pump housing, in which a displacement body 12, for example a gearwheel, is arranged, which is effective within a product channel 7. The product channel and thus the displacement body 12 has a suction side S and a pressure side D. The displacer body 12 is driven by a drive shaft 5 and is mounted in slide bearings 8 and 9.
Auf der Saugseite S des Produktkanales sind Verbindungskanäle 10 und 11 vorgesehen, durch die - wie dies durch die Pfeile in Fig. 1 angedeutet ist - das im Produktkanal geförderte Fördermedium nach Durchströmen der Gleitlager 8 und 9 wieder zurück zur Saugseite des Produktkanales 7 geführt wird.On the suction side S of the product channel, connecting channels 10 and 11 are provided, through which - as indicated by the arrows in FIG. 1 - the conveyed in the product channel Pumped medium after flowing through the slide bearings 8 and 9 back to the suction side of the product channel 7 is guided.
Weiterhin sind Kontrollkanäle 14 und 15 vorgesehen, die in Ge- häusedeckeln 2 und 3 angeordnet sind. Weiterhin sind in denFurthermore, control channels 14 and 15 are provided, which are arranged in housing covers 2 and 3. Furthermore, in the
Gehäusedeckeln 2 und 3 fluchtend mit den Verbindungsbohrungen 10 und 11 Bohrungen 16 und 17 vorgesehen, die Ventilstößel 18 und 19 aufnehmen. Diese Ventilstößel weisen Einschnürungen 20 und 21 auf, wobei die Länge des Ventilstößels zwi- sehen seinem produktkanalseitigen Ende und der Einschnürung so bemessen ist, dass diese Länge der Länge der Verbindungskanäle 10 und 11 im Pumpengehäuse 1 entsprechen.Housing covers 2 and 3 aligned with the connecting bores 10 and 11 bores 16 and 17 are provided which accommodate the valve lifters 18 and 19. These valve tappets have constrictions 20 and 21, the length of the valve tappet between its end on the product channel side and the constriction being dimensioned such that this length corresponds to the length of the connecting channels 10 and 11 in the pump housing 1.
Erfolgt nunmehr ein Produktwechsel, wird - wie aus Fig. 2 er- sichtlich - jeder Ventilstößel 18 bzw. 19 so verstellt, dass das an die Einschnürung 20 bzw. 21 anschließende, produktkanalseiti- ge Ende die gesamte Verbindungsbohrung 10 und 11 verschließt. Nunmehr kann das im Produktkanal 7 geförderte Fördermedium, wie durch die Pfeile in Fig. 2 angedeutet, über den Bereich der Einschnürung 20, 21 zum Kontrollkanal 14 bzw.If there is now a product change, each valve tappet 18 or 19 is adjusted, as can be seen in FIG. 2, in such a way that the end on the product channel side adjoining the constriction 20 or 21 closes the entire connecting bore 10 and 11. The conveyed medium conveyed in the product channel 7 can now, as indicated by the arrows in FIG. 2, via the area of the constriction 20, 21 to the control channel 14 or
15 fließen. Da sowohl die Länge wie auch der Durchmesser der Ventilstößel der Länge und dem Durchmesser der Verbindungsbohrungen 10 und 11 angepaßt ist, erfolgt beim Einfahren der Ventilstößel 18 und 19 in die Verbindungsbohrungen 10 und 11 gleichzeitig ein Reinigen dieser Verbindungsbohrungen.15 flow. Since both the length and the diameter of the valve lifters are adapted to the length and the diameter of the connecting bores 10 and 11, when the valve lifters 18 and 19 are inserted into the connecting bores 10 and 11, these connecting bores are cleaned at the same time.
Das nach einem Produktwechsel durch den Produktkanal 7 fließende Medium reinigt also selbst die Gleitlager, und am Abgabeende der Kontrollkanäle 14 und 15 kann festgestellt wer- den, wann vollkommen reines, dem im Produktkanal 7 entsprechendes Fördermedium austritt, so dass dann die Ventilstößel 18 und 19 wieder zurückgestellt werden können in die in Fig. 1 dargestellte Stellung und nunmehr wieder eine normale Förderung erfolgen kann. The medium flowing through the product channel 7 after a product change therefore cleans the slide bearings itself, and at the discharge end of the control channels 14 and 15 it can be determined when completely clean conveying medium which corresponds to the product channel 7 emerges, so that the valve lifters 18 and 19 can be put back into the position shown in Fig. 1 and now normal funding can take place again.

Claims

Patentansprüche: claims:
1. Förderpumpe für fluide Medien mit in einem Pumpengehäuse (1) gelagertem Verdrängerkörper (12) mit Gleitlager (8, 9) und die Gleitlager (8, 9) mit dem Produktkanal (7) auf der Saugseite (S) verbindenden Verbindungskanälen (10, 11) zur Rückführung des die Gleitlager schmierenden Fördermediums, dadurch gekennzeichnet, dass die Verbindungskanäle (10, 11) mit nach außen mündenden Kon- trollkanälen (14, 15) in Verbindung stehen und in Verlängerung der Verbindungskanäle (10, 11) im Gehäuse des Deckels (2, 3) Führungskanäle (16, 17) vorgesehen sind, die Ventilstößel (18, 19) aufnehmen, die je eine Einschnürung (20, 21) aufweisen, wobei der dem Produktkanal (7) be- nachbarte Teil des Ventilstößels (18, 19) eine Länge und einen Durchmesser aufweist, die der Länge und dem Durchmesser des Verbindungskanales (10, 11) entspricht.1. Feed pump for fluid media with a displacer body (12) with a slide bearing (8, 9) mounted in a pump housing (1) and the slide bearings (8, 9) with the connecting channels (10, 9) connecting the product channel (7) on the suction side (S). 11) for returning the conveying medium lubricating the slide bearings, characterized in that the connecting channels (10, 11) are connected to control channels (14, 15) opening outwards and in the extension of the connecting channels (10, 11) in the housing of the cover (2, 3) guide channels (16, 17) are provided which receive valve tappets (18, 19), each of which has a constriction (20, 21), the part of the valve tappet (18, adjacent to the product channel (7) 19) has a length and a diameter which corresponds to the length and the diameter of the connecting channel (10, 11).
2. Förderpumpe nach Anspruch 1 , dadurch gekennzeichnet, dass die Einschnürung (20, 21) eine Länge aufweist, die der Entfernung der Mündung des Kontrollkanales (14, 15) im Gehäuse der Deckel (2, 3) von der Mündung des Verbindungskanales (10, 11) an der Außenseite des Pumpengehäuses (1) entspricht. 2. Feed pump according to claim 1, characterized in that the constriction (20, 21) has a length which corresponds to the distance from the mouth of the control channel (14, 15) in the housing of the cover (2, 3) from the mouth of the connecting channel (10 , 11) on the outside of the pump housing (1).
EP02792638A 2001-12-12 2002-12-07 Feed pump for fluidic media Expired - Lifetime EP1454062B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10161023 2001-12-12
DE10161023 2001-12-12
DE10202618 2002-01-24
DE10202618A DE10202618C1 (en) 2001-12-12 2002-01-24 Pump for conveying liquid media comprises a displacement body with sliding bearings positioned in a pump housing, and channels connecting the sliding bearings to product channel on the vacuum side to recycle the conveying medium
PCT/DE2002/004486 WO2003050418A1 (en) 2001-12-12 2002-12-07 Feed pump for fluidic media

Publications (2)

Publication Number Publication Date
EP1454062A1 true EP1454062A1 (en) 2004-09-08
EP1454062B1 EP1454062B1 (en) 2008-02-13

Family

ID=26010760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02792638A Expired - Lifetime EP1454062B1 (en) 2001-12-12 2002-12-07 Feed pump for fluidic media

Country Status (6)

Country Link
US (1) US6802702B2 (en)
EP (1) EP1454062B1 (en)
JP (1) JP3909058B2 (en)
AT (1) ATE386212T1 (en)
DE (1) DE50211703D1 (en)
WO (1) WO2003050418A1 (en)

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Also Published As

Publication number Publication date
JP2005511970A (en) 2005-04-28
US6802702B2 (en) 2004-10-12
EP1454062B1 (en) 2008-02-13
US20040109780A1 (en) 2004-06-10
JP3909058B2 (en) 2007-04-25
DE50211703D1 (en) 2008-03-27
WO2003050418A1 (en) 2003-06-19
ATE386212T1 (en) 2008-03-15

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