EP0345132B1 - Vordruck Dosierpumpe mit verbessertem Ansaugverhalten - Google Patents

Vordruck Dosierpumpe mit verbessertem Ansaugverhalten Download PDF

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Publication number
EP0345132B1
EP0345132B1 EP89401449A EP89401449A EP0345132B1 EP 0345132 B1 EP0345132 B1 EP 0345132B1 EP 89401449 A EP89401449 A EP 89401449A EP 89401449 A EP89401449 A EP 89401449A EP 0345132 B1 EP0345132 B1 EP 0345132B1
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EP
European Patent Office
Prior art keywords
metering pump
pump according
piston
channel
actuator rod
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.)
Expired - Lifetime
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EP89401449A
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English (en)
French (fr)
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EP0345132A1 (de
Inventor
Michel Brunet
Patrick Di Giovanni
Claude Jouillat
Jean-Pierre Lina
Hervé Pennaneac'h
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Societe Technique de Pulverisation SA STEP
Original Assignee
Societe Technique de Pulverisation SA STEP
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Filing date
Publication date
Priority claimed from FR8807337A external-priority patent/FR2632358B1/fr
Priority claimed from FR8816722A external-priority patent/FR2640695B1/fr
Priority claimed from FR8906817A external-priority patent/FR2647509B1/fr
Application filed by Societe Technique de Pulverisation SA STEP filed Critical Societe Technique de Pulverisation SA STEP
Priority to AT89401449T priority Critical patent/ATE94780T1/de
Publication of EP0345132A1 publication Critical patent/EP0345132A1/de
Application granted granted Critical
Publication of EP0345132B1 publication Critical patent/EP0345132B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1061—Pump priming means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve

Definitions

  • the present invention relates to a precompression metering pump with improved priming.
  • the precompression dosing pumps have many advantages.
  • the emission of the fluid product essentially results from manual actuation.
  • the latter also does not need to be particularly reinforced to contain a product under high pressure.
  • the metering function is also very useful in the cosmetic or pharmaceutical industry where the quantity of product delivered each time the pump is actuated must be sufficiently precise.
  • the spring 5 ensures the closing of the emission channel 33 by again pressing the needle 41 of the differential piston 4 against the throttle 32 of the rod 31. By releasing moreover the manual effort, the spring 5 causes the pistons 3 and 4 to rise. The pump chamber 23 sees its volume increase again. There is therefore a depression. As soon as the skirt 42 of the differential piston 4 releases the sleeve 24, this causes the product to be sucked in from the reservoir into the chamber 23. The product which it now contains is none other than the next dose which will be emitted during a subsequent actuation of the pump.
  • This priming method is particularly suitable for liquid products which do not fear contact with air. But for pasty products, the discharge of air into the tank only results in the formation of a bubble which generally adheres to the pump body 2. Thus, when the pistons go up, the air in the bubble is preferably at again sucked into the pump chamber 23 which therefore hardly ever starts. As for products which must not remain in the presence of air, it is clear that a backflow inside the container is contraindicated. This is how the present invention aims to arrange the precompression dosing pump of the prior art described above in order to improve priming without introducing the air initially contained in the pump chamber. inside the reservoir of product to be emitted.
  • FIG. 4 to 6 shows compared to the prior art an enlargement of the channel 33 inside the rod 31 downstream of the throttle 32. The latter is then reduced to an annular lug to which reference 32 will now be reserved.
  • a ring 10 is housed in the enlarged section of the channel 33 as well as a cylindrical spring 20, both like the channel 33 and placed with a radial clearance one behind the other. On one side, the ring 10 abuts at the level of the outer ring 103 of its base on the lug 32.
  • the spring 20 is supported on a shoulder 34 of the rod 31 corresponding to the passage of the widening of the channel 33 to its traditional size at the outlet of the rod.
  • the stiffness of the spring 20 must moreover be significant so that everything takes place, in the use phase of the pump, as in the previous state (cf. FIG. 3). If necessary, it is a precompressed spring. In fact, when the actuating rod 31 is pressed, it now transmits its movement to the piston 4 via the contact between the needle 41 and the internal crown 104 of the base of the ring 10 (cf. FIG. 6) . Then, the precompression of the product resulting in the withdrawal of the needle 41, it is this contact which is destroyed while the product fuses outside, passing between the conical top of needle 41 and ring 10.
  • the base of the ring 10 is cut into a truncated cone. This favors in particular the contact 103 of its outer ring against a lug 32 having the simple form of a boss. This also results in a self-centering of the ring 10 on the conical top of the needle 41 which guarantees the contact 104 of its inner crown even if the parts have played a little. It is finally advantageous that the two ends of the ring are cut identically. In this way, the parts are assembled without having to pay attention to the direction of introduction of the ring 10 into the rod 31.
  • the outer surface of the end piece 30 preferably comprises two stages of annular spurs. These can either snap into two grooves in the wall of the channel 33 (not shown), or anchor directly in this wall as long as the material of the main part lends itself to it. In the latter case, the end piece 30 advantageously has an external flange 37. This is then used to adjust the final degree of insertion of the nozzle 30 into the channel 33.
  • the mold comprises for example two dies.
  • a first matrix 6 comprises a central finger 61 matching the shape of the transmission channel 33 from the free end of the main part forming the rod 31 to the lug 32.
  • a second matrix 7 comprises a boss 71 conforming to the part piston 3 proper and also going up to lug 32.
  • the end piece 30 can be made in one piece with the ring 10.
  • the elasticity necessary for push the latter against the lug 32 is then advantageously provided by molded tabs between the base of the nozzle 30 and the upper surface of the ring 10. These are, as the case may be, parallel to the axis of revolution of the assembly and bend towards the surface of the channel 33 or else arranged in a spiral and approach each other. It goes without saying that this second embodiment is very convenient in terms of mounting the pump since three elements can thus be assembled in a single operation.
  • the end piece 30 is preferably made of a fairly rigid plastic material. It is indeed the part of the first hollow piston 3 which is directly actuated. Often, a pusher, itself rigid, covers it in order to facilitate this manipulation by the user. The transmission of the force between the pusher and the end piece 30 is thus made more secure.
  • the main part of the first hollow piston 3 has sealing lips 35 and 36 allowing it to circulate in leaktight fashion along the pump body 2. It is therefore preferable to use a relatively flexible plastic material to constitute it.
  • a rigid material is found in contact with a flexible material and it is not said that the corresponding connection is sufficiently solid and the remainder in spite of the aging of the dosing pump to support the thrust transmitted to the tip 30 by the elastic means 20. In the long run, a separation of the tip is in fact to be feared, fatigue or creep of the materials modifying the conditions of subjugation whether they consist of a force fit or a snap-in.
  • FIGS 10 and 11 show that the first piston 3 is formed in this version of two hollow cylinders 300 and 310 engaged one in the other.
  • the inner cylinder 300 has a sealing lip 36 oriented towards the bottom 22 of the pump body in order to slide in leaktight manner within the pump body 2. It extends upwards into a rod pierced with a central channel 33 for the product issue. About halfway up the channel 33 projects an annular lug 32 advantageously having the shape of a sealing lip oriented towards the outlet of the channel 33.
  • the external cylinder 310 comprises, in this embodiment, also a sealing lip 35 oriented towards the upper end 21 of the pump body in order to slide in leaktight manner within the pump body 2. In a more characteristic manner the present invention, it extends upward into a rod. The latter surrounds the rod of the inner cylinder 300 and thins above it into a hollow end portion 37 extending from the channel 33.
  • a free space 320 is provided between the end of the rod of the inner cylinder 300 and the thinning of the outer cylinder 310.
  • a crown 34 protrudes opposite the channel 33 at the base of the terminal part 37 of the rod of the outer cylinder 310.
  • This ring 34 has different radial channels 311 connecting the free space 320 with the channel 33.
  • annular notch 312 is formed at the outer root of the rod of the inner cylinder 300.
  • annular boss is provided at the inner root of the rod of the outer cylinder 310.
  • a priming assembly 100 is presented. It could just as easily be used in the two variants described above in place of the ring 10 and elastic means 20.
  • This assembly 100 is in fact made up of two identical rings 10 and 10 ′ linked together by a partition 20 cylindrical with the same axis as the rings. In the absence of external stresses, the latter corresponds for example to a thin hollow cylinder of the same internal diameter as the rings 10 and 10 '. Its small thickness also allows its elastic bending so that it can take the shape of a barrel shown in the drawings. It is however less flexible than spring 5.
  • the priming assembly 100 is housed within the channel 33. If a radial clearance is maintained, the assembly 100 is therein compressed axially between the end portion 37 of the rod of the outer cylinder 310 and the annular lug 32 which both provide support.
  • the upper ring 10 'rests on the entire surface of its section against the crown 34 of the terminal part 37.
  • the lower ring 10 is applied, for its part, against the lug 32 in a very localized zone 103 which, the elasticity of the parts helping, guarantees a tight contact.
  • the partition 20 When the user stops pressing the first piston 3, the partition 20 immediately seeks to return to its initial shape. It follows the very rapid restoration of contact 103 between the ring 10 and the lug 32 so that the pump chamber 23 is found completely isolated from the outside. As it is also isolated from the tank thanks to the sealing lips 43 of the skirt 42 circulating on the sleeve 24, the increase in its volume as the return spring 5 relaxes, causes the development of a depression within it. In the embodiment of Figure 10, the depression can reach a substantial value thanks to the presence in particular of the sealing lip 35 of the cylinder 310 outside of the piston rod 3 which prevents any infiltration of air.
  • a suction force urges this lip 35 and effectively opposes the separation of the two cylinders 300 and 310 forming the first piston 3 that the assembly 100 would otherwise tend to cause. This strengthens their connection at the snap 312 and, in some cases, can even make the latter useless.
  • a new actuation of the first piston 3 results this time in the compression of the product trapped in the pump chamber 23.
  • the return spring 5 more flexible, is always stressed in the first place.
  • the volume of the pump chamber 23 drops.
  • the sealing lip 43 of the skirt 42 circulating on the sleeve 24 as well as the sealing lip 36 of the cylinder 300 inside the first piston 3 also guarantee the insulation of the chamber 23 so that the pressure of the product trapped in her breast is growing. This then causes the differential piston 4 to be withdrawn by the intermediary of the pressure which is exerted on the step 44 and opposes the restoring force of the spring 5.
  • the ring 10 therefore remains all the better maintained at 103 against the lug 32 that the cylinder 310 outside tends to deform in a barrel and compress the priming assembly 100. It is rather the turn of contact 104 with the needle 41 to break. The product under pressure then fuses between the needle 41 and the ring 10 to gain the exterior via the central holes of the ring 10, of the partition 20, of the ring 10 ′ and finally of the terminal part 37 of the cylinder 310 outside.
  • FIG. 12 very schematically shows how its internal cylinder 300 could be produced. It would suffice to use a two-part mold. A first part 6 would have in hollow the imprint of the outer surface of the cylinder 300 and, projecting in the center of the latter, a first finger 61 conforming to the internal shape of the channel 33 downstream of the lug 32. A second part 7 of the mold would, in turn, have a second finger 71 matching the interior shape of the channel 33 upstream of the lug 32. By pulling part 6 to the right of Figure 12 and part 7 to the left, the cylinder 300 find naked without the pin 32 does not suffer from friction.
  • the priming assembly 100 is engaged in the latter downstream of the lug.
  • the assembly 100 is advantageously reversible. This is the case of the assembly 100 which has just been described and which comprises two identical rings 10 and 10 ′ while only the ring 10 in contact with the lug is useful for the proper functioning of the pump. Then, the assembly is completed by engaging the outer cylinder 310 on the inner cylinder 300 and causing them to snap, if necessary.
  • the third variant described hitherto with reference to FIG. 10 involves two sealing lips carried by the first hollow piston 3.
  • each of them is active in a different phase of the pump's operation: the lip 36 of the inner cylinder 300 participating in the isolation of the pump chamber 23 during the compression of its contents and the lip 35 of the outer cylinder 310 guaranteeing the development of a significant depression in chamber 23.
  • the metering pump of the prior art is sometimes arranged in such a way that, during the raising of the pistons, its chamber 23 is the place of a depression of lesser importance.
  • French patent 2,558,214 filed in 1984 by the company VALOIS provides for example one or more bores 48 in the differential piston 4.
  • the sealing lip 35 of the outer cylinder 310 is no longer useful. As shown in FIG. 11, it is then preferable to eliminate it in order to reduce the friction of the first hollow piston 3 on the pump body 2 and thus authorize the use of a more flexible return spring 5. Instead, a simple annular rim 35 can be provided. If its diameter is less than that of the interior of the pump body 2, the flange 35 must remain suitable for contact with the tower 1 in the pump rest position. This contact is indeed useful at the stop of the first hollow piston 3 determining its high position. It may also be necessary to isolate the tank from the outside when an air vent 13 is otherwise provided. It is understood, however, that the molding of the rim 35 with the external cylinder 310 does not present any particular difficulty.
  • the constitution of the first hollow piston 3 in two parts even allows easy adaptation to this second type of metering pump since the inner cylinder 300 and the priming assembly 100 remain, for their part, unchanged. Their respective molds therefore apply to all of the dosing pumps mentioned here. Note, however, that in this embodiment, the snap-fastening 312 or any other means of connection is essential in order to keep the two cylinders 300 and 310 integral, especially during the raising of the pistons to which no suction is no longer opposed. .
  • the needle 41 is roughly replaced by a cylindrical piece 10 of the same axis as that of the pump and which fits inside the piston 4 reduced in this case to its skirt 42 and its tier 44.
  • the base of the cylindrical part 10 is full. It is provided on the outside with a rim 101 which allows the spring 5 to press it against the piston 4.
  • the part 10 is made integral with the piston in order to reproduce the operating mode of the anterior pumps.
  • the upper part of the part 10 has an internal channel 105 opening directly into the channel 33 of the rod 31 of the piston 3.
  • This internal channel 105 communicates with another channel 102, horizontal, located approximately halfway up the part cylindrical 10.
  • this horizontal channel 102 is insulated by an upper skirt 46 provided specially in the upper part of the piston 4.
  • a cylindrical spring 20 bears against this upper skirt 46. It surrounds the head of the cylindrical part 10 so as to bear moreover against the throttle 32 of the channel 33 inside the rod 31.
  • the spring 20 must be hard so that at least at the start of the stroke of the actuating rod 31, the descent of the latter does indeed cause an identical movement of the p iston 4. It can for example be precompressed.
  • the depression of the rod 31 drives the piston 4 towards the inside of the pump thanks to the stop offered by the throttle 32.
  • the product put under pressure in this way ensures the withdrawal of the piston 4 as well as the cylindrical piece 10 which is then gripped by the upper skirt 46 having, for this purpose, a hook shape.
  • the insertion of the actuating rod 31 can be carried out further.
  • the air from the pump chamber 23 does not hinder its descent until the piston 4 comes into abutment on the sleeve 24.
  • the user then manages to compress the spring 20. This results in a relative movement of the cylindrical part 10 relative to the piston 4 and the release of the upper skirt 46 (cf. FIG. 14).
  • the compressed air can then flow through the channels 102, 105, then 33 and be evacuated outside the tank, which is the end sought after.
  • FIGS. 15 and 16 The fifth variant of the improvement illustrated by FIGS. 15 and 16 is very close to the previous one.
  • the cylindrical part 10 is almost entirely reproduced with the rim 101, the channels 102 and 105 ...
  • the difference lies only in the elastic means which allow, at the end of the first depression of the actuating rod 31, to cause the release of the upper skirt 46 of the piston 4.
  • the upper part of the cylindrical part 10 has fins with a lower bevel.
  • the upper skirt 46 can then be deformed when its hook-shaped edge rises on the beveling under the effect of external compression.
  • the air in this case flows between the fins as far as channel 102.

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  • Reciprocating Pumps (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (28)

  1. Vorkompressions-Dosierpumpe, die zur Ausgabe eines flüssigen oder pastenförmigen Produkts dient, wobei die Pumpe aufweist
    - einen Pumpenkörper (2) mit einem Boden (22), der mit einem Reservoir des Produkts in Verbindung steht, und mit einem zur Atmosphäre hin offenen Oberteil (21),
    - einen Hohlkolben (3), um eine Pumpenkammer (23) im Inneren des Pumpenkörpers (2) abzutrennen und unter Druck zu setzen, wobei der Hohlkolben (3) sich durch das offene Oberteil (21) des Pumpenkörpers (2) in einer Betätigungsstange (31) verlängert, durch die ein Ausgangskanal (33) verläuft, der an einem freien Ende der Stange (31) mündet,
    - einen Differentialkolben (4), der in der Pumpenkammer (23) angeordnet ist, um die Verbindung mit dem Reservoir und/oder dem Ausgangskanal (33) zu unterbrechen,
    - einer Rückholfeder (5), um den Hohl- (3) und den Differentialkolben (4) vorzuspannen,
    dadurch gekennzeichnet, daß außerdem eine Ansaugeinrichtung (100) vorgesehen ist, die elastische Mittel (20) und mindestens ein zylindrisches Teil (10) aufweist, das einerseits mit dem Differentialkolben (4) zur Bildung einer erste Ausgangsklappe, die für die Ausgabe des Produkts reserviert ist, und andererseits mit der Betätigungsstange (31) zusammenwirkt, um eine zweite Ausgangsklappe zu bilden, die innerhalb des Ausgangskanals (33) die Entfernung der Luft erlaubt, die ursprünglich in der Pumpenkammer (23) enthalten war, wobei die erste Klappe geschlossen ist, wenn die zweite Klappe geöffnet ist und umgekehrt.
  2. Dosierpumpe nach Anspruch 1, in der die elastischen Mittel (20) weniger biegsam sind als die Rückholfeder (5), so daß, während eine äußere Kraft auf die Betätigungsstange (31) ausgeübt wird, um den Hohlkolben (3) in den Pumpenkörper (2) zurückzustoßen, die erste Ausgangsklappe sich öffnet, wenn die Pumpenkammer (23) einen ausreichenden Druck aufweist, um den Differentialkolben (4) gegen die von der Rückholfeder (5) übertragene Rückholkraft zu verschieben, wobei die zweite Ausgangsklappe sich öffnet, wenn der Differentialkolben (4) gegen den Pumpenkörper (2) in Anschlag liegt.
  3. Dosierpumpe nach einem beliebigen der Ansprüche 1 oder 2, bei der die Ansaugeinrichtung (100), deren mindestens ein zylindrisches Teil (10) aus einem Ring mit einer Basis besteht, mit radialem Spiel im Ausgangskanal (33) der Betätigungsstange (31) angeordnet und durch Anschlag zwischen Auflagemitteln (34) und einem Zapfen (32) zurückgehalten wird, die dieser Kanal (33) aufweist und die sich je auf der Seite des freien Endes der Betätigungsstange (31) bzw. auf der Seite der Pumpenkammer (23) befinden, wobei die Basis dieses Rings innen in einer ersten ringförmigen Kontaktzone (104) auf dem Differentialkolben (4) aufliegt, um die erste Ausgangsklappe zu bilden, und außen in einer zweiten ringförmigen Kontaktzone (103) auf dem Zapfen (32) aufliegt, um die zweite Ausgangsklappe zu bilden, wobei das zylindrische Teil (10) des Differentialkolbens (4) und die Stange (31) in Höhe der ringförmigen Kontaktzonen (103, 104) so geformt sind, daß, wenn der Differentialkolben (4) gegen den Pumpenkörper (2) in Anschlag kommt, die Betätigungsstange (31) weiter in den Pumpenkörper (2) eingedrückt werden kann, und daß die zweite ringförmige Kontaktzone (103) verschwindet.
  4. Dosierpumpe nach Anspruch 3, bei der die Basis des Rings kegelstumpfförmig geformt ist, während der Zapfen (32) die Form einer Wölbung hat.
  5. Dosierpumpe nach Anspruch 3, bei der die Basis des Rings eben ist, während der Zapfen (32) eine Dichtlippe ist, die zum freien Ende der Betätigungsstange (31) hin ausgerichtet ist.
  6. Dosierpumpe nach einem beliebigen der Ansprüche 3 bis 5, bei der die Auflagemittel (34) aus einer Verengung des Ausgangskanals (33) bestehen.
  7. Dosierpumpe nach einem beliebigen der Ansprüche 3 bis 6, bei der die elastischen Mittel (20) aus einer vorgespannten Feder bestehen.
  8. Dosierpumpe nach einem beliebigen der Ansprüche 3 bis 5, bei der ein hohler Einsatz (30) durch dichtes Einfügen in das freie Ende der Betätigungsstange (31) eingeklemmt ist, so daß er den Querschnitt des Ausgangskanals (33) verengt und die Auflagemittel (34) bildet, die als Anschlag für die Ansaugeinrichtung (100) dienen.
  9. Dosierpumpe nach Anspruch 8, bei der der hohle Einsatz (30) außen mindestens zwei ringförmige Sporne aufweist, die mit mindestens zwei ringförmige Kerben des freien Endes der Betätigungsstange (31) zusammenwirken, um durch Einklinken befestigt zu werden.
  10. Dosierpumpe nach Anspruch 8, bei der der hohle Einsatz (30) aus dem freien Ende der Betätigungsstange (31) vorsteht und aus einem Kunststoffmaterial besteht, das steifer ist als das des ersten Kolbens (3).
  11. Dosierpumpe nach Anspruch 10, bei der der Einsatz (30) außen mindestens zwei ringförmige Sporne sowie einen Kragen (37) aufweist, wobei die Sporne sich im Inneren des freien Endes der Betätigungsstange (31) verankern, während der Kragen (37) sich auf das freie Ende der Betätigungsstange (31) auflegt.
  12. Dosierpumpe nach einem beliebigen der Ansprüche 8 bis 11, bei der der Einsatz (30) fest mit dem Ring verbunden ist, wobei die elastischen Mittel (20) aus Zungen bestehen, die den Einsatz (30) und den Ring verbinden.
  13. Dosierpumpe nach Anspruch 12, bei der die Zungen parallel zur Achse des Ausgangskanals (33) sind.
  14. Dosierpumpe nach Anspruch 12, bei der die Zungen sich spiralförmig um die Achse des Ausgangskanals (33) rollen.
  15. Dosierpumpe nach einem beliebigen der Ansprüche 3 bis 5, bei der der Hohlkolben (3) aus einem inneren Hohlzylinder (300) und einem äußeren Hohlzylinder (310) besteht, wobei diese Zylinder (300, 310) sich ineinander einfügen können, wobei der Zapfen (32) an der Innenwand des inneren Zylinders (300) vorsteht, während die Auflagemittel (34) aus einer Querschnittsverjüngung des äußeren Zylinders (310) bestehen.
  16. Dosierpumpe nach Anspruch 15, bei der der innere Zylinder (300) eine Dichtlippe (36) aufweist, die zur Pumpenkammer (23) hin ausgerichtet ist, um dicht innerhalb des Pumpenkörpers (2) zu gleiten.
  17. Dosierpumpe nach Anspruch 16, bei der die Zylinder (300, 310) des Hohlkolbens (3) mit Verbindungsmitteln (312) versehen sind, die es erlauben, sie fest miteinander zu verbinden.
  18. Dosierpumpe nach Anspruch 17, bei der die Verbindungsmittel (312) der Zylinder (300, 310) des Hohlkolbens (3) aus einer ringförmigen Kerbe, die auf der Außenoberfläche des inneren Zylinders (300) angebracht ist, und einer ringförmigen Wölbung bestehen, die auf der Innenoberfläche des äußeren Zylinders (310) ausgearbeitet ist, wobei die Kerbe und die Wölbung sich ineinander verklinken können, wenn die Zylinder (300, 310) übereinandergeschoben sind.
  19. Dosierpumpe nach einem beliebigen der Ansprüche 16 bis 18, bei der der äußere Zylinder (310) eine Dichtlippe (35) aufweist, die zur offenen Oberseite (21) des Pumpenkörpers (2) hin gerichtet ist, um dicht innerhalb des Pumpenkörpers (2) zu gleiten.
  20. Dosierpumpe nach Anspruch 17 oder Anspruch 18, wobei die Dosierpumpe mit einer komplementären Einlaßklappe (47) versehen ist, die sich zu Beginn des Aufsteigens der Kolben (3, 4) öffnet, bei der der äußere Zylinder (310) einen Rand (35) aufweist, der sich zur offenen Oberseite (21) des Pumpenkörpers (2) hin erstreckt und mit Spiel innerhalb des Pumpenkörpers (2) gleitet.
  21. Dosierpumpe nach einem beliebigen der Ansprüche 15 bis 20, bei der der äußere Zylinder (310) einen verdünnten Endbereich (37) aufweist, von dem eine innere Basis beim Ineinanderfügen der Zylinder (300, 310) vor das Innere des inneren Zylinders (300) zu liegen kommt, um die Auflagemittel (34) des Kanals (33) zu bilden.
  22. Dosierpumpe nach Anspruch 21, bei der ein Ring (10'), der identisch dem mindestens einen zylindrischen Teil (10) ist, das vom Ring gebildet wird, ebenfalls im Kanal (33) stromabwärts hinter den elastischen Mitteln (20) angeordnet ist.
  23. Dosierpumpe nach Anspruch 22, bei der die innere Basis des Endbereichs (37) des äußeren Zylinders (310) eine Oberfläche aufweist, die im wesentlichen gleich dem Querschnitt der Ringe (10, 10') ist, so daß der eine oder der andere dieser Ringe (10, 10') darauf aufliegen kann.
  24. Dosierpumpe nach Anspruch 23, bei der die elastischen Mittel (20) aus einer dünnen zylindrischen Trennwand bestehen, die fest mit den Ringen (10, 10') verbunden ist und den gleichen Innendurchmesser aufweist wie die Ringe (10, 10').
  25. Dosierpumpe nach Anspruch 24, bei der die innere Basis des Endbereichs (37) des äußeren Zylinders (310) in einer Krone vorspringt; wenn die Zylinder (300, 310) des Hohlkolbens (3) übereinandergeschoben sind, der innere Zylinder (300) sich bis zur Oberfläche dieser Krone erstreckt, so daß ein freier Raum (320) am Ende des inneren Zylinders (300) vorhanden ist, der der Dicke entspricht, um die die Krone vorspringt; und radiale Rinnen (311) in der Krone ausgearbeitet sind, um den freien Raum (320) mit dem Kanal (33) zu verbinden.
  26. Dosierpumpe nach einem beliebigen der Ansprüche 1 oder 2, bei der das mindestens eine zylindrische Teil (10) einen massiven unteren Bereich mit einem Außenrand (101) aufweist, während ein oberer Bereich mit einem senkrechten Kanal (105) mit einem waagrechten Kanal (102) in Verbindung steht, welcher in etwa in der Hälfte seiner Höhe angeordnet ist, wobei das Teil (10) sich in den Differentialkolben (4) derart einfügt, daß der Rand (101) sein Wiederaufsteigen im Differentialkolben (4) blockiert, und daß eine obere Schürze (46) des Differentialkolbens (4) mit einem hakenförmigen Rand diesen waagrechten Kanal (102) bedeckt und die zweite Ausgangsklappe bildet, wobei die erste Ausgangsklappe aus der Spitze des mindestens einen zylindrischen Teils (10) besteht, die sich auf eine Verengung (32) des Ausgangskanals (33) der Stange (31) stützt, und daß die elastischen Mittel (20) sich der relativen Verschiebung der Betätigungsstange (31) und des Differentialkolbens (4) widersetzen.
  27. Dosierpumpe nach Anspruch 26, bei der die elastischen Mittel (20) aus einer Feder, vorzugsweise einer vorgespannten Feder bestehen, die den oberen Bereich des zylindrischen Teils (10) umgibt und sich auf die obere Schürze (46) des Kolbens (4) sowie auf die Verengung (32) des Kanals (33) der Betätigungsstange (31) stützt.
  28. Dosierpumpe nach Anspruch 26, bei der die elastischen Mittel (20) mit abgeschrägten Rippen des oberen Bereichs des zylindrischen Teils (10) zusammenwirken.
EP89401449A 1988-06-02 1989-05-26 Vordruck Dosierpumpe mit verbessertem Ansaugverhalten Expired - Lifetime EP0345132B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401449T ATE94780T1 (de) 1988-06-02 1989-05-26 Vordruck dosierpumpe mit verbessertem ansaugverhalten.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
FR8807337A FR2632358B1 (fr) 1988-06-02 1988-06-02 Perfectionnement de pompes-doseuses a precompression ameliorant l'amorcage
FR8807337 1988-06-02
FR8816722 1988-12-19
FR8816722A FR2640695B1 (fr) 1988-12-19 1988-12-19 Pompe doseuse a precompression et a amorcage ameliore avec tige-piston adaptee aux conditions de moulage et de fonctionnement
FR8906817A FR2647509B1 (fr) 1989-05-24 1989-05-24 Tige-piston pour pompe-doseuse a precompression et a amorcage ameliore et son procede de moulage
FR8906817 1989-05-24

Publications (2)

Publication Number Publication Date
EP0345132A1 EP0345132A1 (de) 1989-12-06
EP0345132B1 true EP0345132B1 (de) 1993-09-22

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EP89401449A Expired - Lifetime EP0345132B1 (de) 1988-06-02 1989-05-26 Vordruck Dosierpumpe mit verbessertem Ansaugverhalten

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Country Link
US (1) US4930999A (de)
EP (1) EP0345132B1 (de)
JP (1) JPH02127270A (de)
DE (1) DE68909310T2 (de)

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JPH0410087U (de) * 1990-05-15 1992-01-28
FR2664182B1 (fr) * 1990-07-09 1992-10-09 Valois Pompe-doseuse pour pulverisateur sous pression avec securite intrinseque.
DE4035688A1 (de) * 1990-11-09 1992-05-14 Pfeiffer Erich Gmbh & Co Kg Austragvorrichtung fuer medien
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FR2674747B1 (fr) * 1991-04-05 1993-07-30 Step Soc Tech Pulverisation Dispositif distributeur de gouttes de petit volume, notamment pour soins ophtalmologiques.
ATE180685T1 (de) * 1991-12-02 1999-06-15 Py Daniel C Vorrichtung zum verabreichen eines medikaments ins auge
BR9201113A (pt) * 1992-03-30 1993-10-05 Jack Brakarz Aperfeicoamento em micro-bomba atomizadora de liquidos
US5267986A (en) 1992-04-06 1993-12-07 Self-Instill & Co., Inc. Cartridge for applying medicament to an eye from a dispenser
FR2699835B1 (fr) * 1992-12-28 1995-03-31 Oreal Ensemble pour la pulvérisation d'un liquide comportant une pompe à précompression.
US5370280A (en) * 1993-12-14 1994-12-06 Su; Cheng-Yuan Valve for a sprayer
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Also Published As

Publication number Publication date
DE68909310D1 (de) 1993-10-28
DE68909310T2 (de) 1994-03-24
EP0345132A1 (de) 1989-12-06
JPH02127270A (ja) 1990-05-15
US4930999A (en) 1990-06-05

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