WO2011060801A1

WO2011060801A1 - Liquid pumping device

Info

Publication number: WO2011060801A1
Application number: PCT/EP2009/008246
Authority: WO
Inventors: Karan Dadgar
Original assignee: Karan Dadgar
Priority date: 2009-11-19
Filing date: 2009-11-19
Publication date: 2011-05-26

Abstract

The invention relates to a liquid pumping device in the form of a syringe-like device, an injection syringe, or a dispenser, for dispensing or injecting in a metered manner fluids such as liquids in particular, including in the form of a mist, or liquid or mushy masses or pastes, the liquid pumping device being substantially composed of a dispensing device (1c) for dispensing the fluid in a metered manner, a reservoir (1a) for the fluid (M) that can be fastened thereto in an exchangeable manner, and an outer housing (1b), which encloses at least the reservoir (1a) and can be detachably fastened to the dispensing device (1c).

Description

Liquid pump device

The invention relates to a liquid pump device in the form of a syringe-like device, an injection syringe or a dispenser for the metered dispensing or injection of fluids such as in particular liquids, also in the form of a spray, or liquid or pasty masses or pastes, with a reservoir for the fluid and a dispenser for metered dispensing of the fluid. The invention is particularly suitable for the metered dispensing of dyes, adhesives and sealants as well as food masses such as spice sauces and spreads, or for the metered injection of, for example, vaccines, medicaments or other, for example, dental substances.

Such a liquid pump device is known from DE 10 2008 005 557. An object of the invention is to further improve the ease of use of such a liquid pump device.

This object is achieved with a liquid pump device of the type mentioned, having the features of claim 1.

A particular advantage of this solution is that the reservoir containing the fluid to be dispensed can be replaced in a relatively simple manner. This not only simplifies and speeds up the dispensing or application of different fluids, but also has cost advantages in that after a complete consumption of the fluid does not change the entire fluid pump device, but only the empty reservoir must be replaced with a new reservoir.

The dependent claims have advantageous developments of the invention to the content.

Further details, features and advantages of the invention will become apparent from the following description of exemplary and preferred embodiments with reference to the figures, in which identical or corresponding parts or components are designated by like reference numerals. It shows:

1 is a schematic representation of a partially known liquid pump

CONFIRMATION COPY pengerätes;

Fig. 2 is a schematic representation of a first embodiment of a liquid pump device according to the invention;

3 schematic representations of a second embodiment of a liquid pump device according to the invention and of a dispensing device in an enlarged view;

4 shows a schematic detail view of a first embodiment of the connection region between a storage container and a delivery device;

5 shows a schematic detail view of a second embodiment of the connection region between a storage container and a delivery device;

6 shows a schematic detail view of a third embodiment of the connection region between a storage container and a delivery device;

FIG. 7 shows a schematic detail view of a fourth embodiment of the connection area between a storage container and a delivery device; FIG.

8 shows schematic detail views of various embodiments of the delivery device of the liquid pump device according to the invention;

9 shows various detail views of a third embodiment of a fluid pump device according to the invention;

10 shows a schematic representation of a fourth embodiment of a fluid pump device according to the invention; and

Fig.ll is a schematic representation of a fifth embodiment of a liquid pump device according to the invention.

FIG. 1 shows a schematic view of an overall view of a known liquid pump device, as it is partially shown in DE 10 2008 005 557 with regard to its basic construction. The device comprises a storage container 1 in which the fluid M to be dispensed or to be injected through a drainage tube 4 is located. The storage container 1 is here preferably cylindrical, but may also have other shapes. Within the reservoir 1 is preferably a reservoir-piston 2, which rests on the fluid M and hermetically seals with the inner wall of the reservoir 1. In the upper region of the storage container 1, ie at its end opposite the drainage tube 4, there is a small opening 3 through which air can enter the space of the storage container 1 above the storage container piston 2 to equalize the pressure during emptying of the storage container 1 to accomplish. The liquid pump apparatus further comprises a dispenser having substantially a pump tube 7 and a first check valve 5 for supplying fluid from the reservoir 1 into the pump tube 7 and a second check valve 6 for discharging fluid from the pump tube 7 into the drain tube 4 each of the first and second check valves 5, 6 may be in the form of first and second ball-spring systems or first and second rubber diaphragms or otherwise configured to function as a passage of the fluid in one direction and to block the fluid to meet in the opposite direction.

In the pump tube 7 is a hermetically sealed with the inner wall of the pump tube 7 piston 9, with the within the pump tube 7 a volume for the occurred through the first check valve 5 in this volume fluid M is delimited. The piston 9 is displaceable to change this volume in the pump tube 7, wherein the fluid M sucked at an increase in volume through the first check valve 5 from the reservoir 1 in the volume and at a reduction of the volume through the second check valve 6 from the volume and is discharged through the drainage tube 4 from the liquid pumping apparatus.

The piston 9 is preferably acted on by the force of a compression or tension spring 8, with which this is displaced in one of the two directions, while the displacement of the piston 9 in the other direction manually by means of a connected to the piston 9 operating knob 12th takes place, either by pressing, preferably until the operating knob 12 abuts a first stop 91a on the pump tube 7, or by pulling the operating knob 12, preferably until the piston 9 at this first stop 91a or another stop inside the pump tube. 7 is applied.

The compression or tension spring 8 can be mounted at three different locations, namely either, as shown in Figure 1, between the piston 9 and the first stop 91a opposite end 92 of the pump tube 7, or between the piston 9 and the first stop 91a within the pumping tube 7, as shown in FIGS. 2, 3 (A) and 3 (B), or between the actuating button 12 and the first stop 91a, as shown in FIG. 3 (C). provides.

To set the path length with which the piston 9 can be pressed in, it is preferably connected to the actuating knob 12 via a threaded mechanism 10, 11. The threaded mechanism comprises a threaded rod 10 which can be screwed into or out of a threaded sleeve 11, wherein in the illustrated case, the threaded rod 10 is fixed to the piston 9 and the threaded sleeve 11 on the actuating knob 12. Preferably, the threaded rod 10 and the threaded sleeve 11 are secured together so that the threaded sleeve 11 can not be completely turned off by the threaded rod 10.

By turning the actuating knob 12 and thus the threaded sleeve 11 relative to the threaded rod 10, the maximum path length of the actuating knob 12 to the first stop 91a on the pump tube 7, and thus the maximum distance, with the piston 9 by pressing the operating knob 12th in the pump tube 7 can be moved in the direction of the second end 92, increased or decreased. By completely screwing the operating knob 12 to the first stop 91a, the function of the dispensing device can be put out of operation, since in this case the operating knob 12 can not be (further) pressed. This effectively prevents e.g. during transport of the liquid pump device accidentally by pressing the actuating button 12 fluid is discharged.

The first stop 91a is provided with a bore for the threaded rod 10 and in this way also serves to guide the threaded rod 10. Overall, therefore, by turning the actuating knob 12, the amount of fluid to be dispensed can be adjusted very easily and accurately. The dispensing itself then takes place by pressing the actuating button 12 as far as the first stop 91a, whereby a corresponding pressure is exerted on the fluid present in the pump tube 7 by means of the piston 9 hermetically sealed against the inner wall of the pump tube 7 and thereby the second non-return valve 6 opens so that the fluid through the drainpipe 4th can escape. By the pressure, the first check valve 5 is kept closed at the same time, so that the fluid can not flow back into the reservoir 1. On the drainage tube 4, a suitable for the application in question or the fluid to be dispensed applicator preferably, for example in the form of an injection needle or a brush or a nozzle for generating a spray can be attached. For screwing a cap on the drain tube 4 or a container for the applicator member when not in use of the Flüssigkeitsspumpe- device, a threaded projection 41 is finally provided.

Figure 2 shows a schematic representation of a first embodiment of a liquid pump device according to the invention. Identical or corresponding parts as in Figure 1 are again denoted by the same reference numerals, so that it is possible to dispense with a new explanation in particular of the dispensing device.

In contrast to the liquid pumping device according to FIG. 1, the embodiment according to the invention according to FIG. 2 comprises three components which can be separated from one another, namely a reservoir 1a, an outer housing 1b enclosing the same, and the delivery device 1c, which essentially comprises the fluid pump with the pump tube 7, the spring 8, the piston 9, the first and the second check valve 5, 6, the Abschlussröhrchen 4, and the Betätigungslementen 10, 11, 12 as described above in connection with Figure 1 comprises.

FIGS. 3 (A) and 3 (B) show again in a simplified representation the principle of the liquid pump device according to FIG. 2 with its three components mentioned above. From this representation, it is clear that first of all the storage container 1a is fastened to the delivery device 1c and then the outer housing 1b is guided over the storage container 1a (FIG. 3 (A)) and fastened to the delivery device 1c (FIG. 3 (B)). ).

On the one hand, the outer housing 1b protects the (inner) storage container 1a located therein against, in particular, mechanical action from the outside and, on the other hand, also increases the mechanical strength of the entire liquid container. Pumping device, so that there is no risk that the connection area between the reservoir la and the dispenser lc breaks off, leaking or takes damage. In this context, it should be noted that the storage container la on the one hand according to Figure 2, a solid container and on the other according to Figure 3 (A) and 3 (B) can also be designed as a flexible container, for example in the form of a tube, which during emptying of course, so that the preferably provided in the solid container piston 2 in the tube is of course not required. Optionally, the housing lb is provided with an opening to provide during the emptying of the tube pressure equalization within the housing lb, as described in connection with Figure 1 and the opening 3 shown there. The housing 1b preferably has a cylindrical shape with a circular or oval cross-section. It is preferably provided at its open end with an internal thread 3a, with which the housing lb can be screwed onto a corresponding external thread 3b on the circumference of the dispenser lc. Instead of the illustrated screw connection 3a, 3b, however, a bayonet or plug connection 31a, 31b (see FIG. 11) may also be provided.

FIG. 3 (C) again shows in detail the dispensing device 1c of a liquid pump device according to the invention, as shown by way of example in FIGS. 2, 3 (A) and 3 (B).

The dispenser lc essentially comprises a carrier T, on the outer circumference of which the external thread 3b for the internal thread 3a is located on the housing 1b. In the carrier T is the pump tube 7, in which the piston 9 is guided. The piston 9 is connected via the threaded rod 10 and the threaded sleeve 11 with the actuating knob 12. Between the operating knob 12 and the first stop 91a on the carrier T is a tensile or pressure error 8, against the force of which the piston 9 manually as described above in the pump tube 7 is moved and in particular can be pressed into this. Further, in Figure 3 (C), the first check valve 5 and the second check valve 6 are indicated, which are each formed here in the form of a rubber membrane or rubber lips. Furthermore, it can be seen in FIG. 3 (C) that an internal thread 52 is located in the channel in which the first check valve 5 is arranged and which establishes a fluid connection to the reservoir 1a. This internal thread 52 serves to screw the reservoir la by means of a corresponding threaded pin 51 fluid-tight with the dispenser lc.

Instead of the illustrated screw 51, 52, however, may be provided for securing the reservoir la to the dispenser lc turn a bayonet or plug connection, as long as thus a fluid-tight connection between the reservoir la and the dispenser lc can be ensured.

The second check valve 6 constitutes a fluid connection for the fluid M sucked into the pump tube 7 from the reservoir la, via which this fluid is led into the drain tube 4. The drainage tube 4 is surrounded by the threaded projection 41, which can serve to screw a container or a cap onto the drainage tube 4, thereby preventing the fluid M present in the drainage tube 4 from drying up when the liquid pumping device is not in use. On the drain tube 4, in turn, a suitable applicator organ, for example in the form of a brush or an injection needle or a spray nozzle or the like can be placed, with which the fluid is discharged. This also applies to all embodiments described below. The connection area between the reservoir la and the dispenser lc will now be explained in more detail in different variants with reference to Figures 4 to 7, wherein instead of the threaded connection 51, 52 shown in each case also a bayonet or plug connection can be provided. Figure 4 shows a first embodiment of such a connection region, in Figure 4 (A) in a side view, in Figure 4 (B) in a plan view of the internally threaded bore 52, and in Figure 4 (C) is a perspective view in this hole. The connection area comprises the area between the first check valve 5 and the threaded pin 51, which is arranged in the bottom of the storage container la. is net. This threaded pin 51 is provided with a channel through which the existing in the reservoir la fluid M can enter the dispenser lc. The channel in the threaded pin 51 has at its free end a closure 51a, by which it is prevented that the existing in the reservoir la fluid M can escape as long as the reservoir la is not connected to the dispenser lc.

This shutter 51a is designed to open upon connection of the reservoir 1a to the dispenser lc. For this purpose, the exhaust device 1c has a device 53a, with which the closure 51a pierces during connection (which preferably takes place by screwing on) and is thus opened. In the first embodiment of the connection region shown in FIG. 4, this device comprises a mandrel 53a, which presses into the closure 51a when the threaded pin 51 is screwed into the threaded bore 52 in the delivery device 1c, thereby opening it.

The closure 51a is formed in the simplest case by a glued to the free end of the threaded pin 51 film. It can also be formed by a pre-punching in a closure lid of the threaded pin 51, a ball at the free end of the channel of the threaded pin 51 or by a valve in the manner that it closes again when the reservoir la detached from the dispenser lc or is unscrewed. For this purpose, a lid formed of rubber is preferably used at the end of the threaded pin 51 or a rubber element at the end of the channel, which is pierced by the mandrel 53 a and again closes fluid-tight upon withdrawal of the mandrel 53 a due to its elastic properties.

The mandrel 53 a is by means of a web 54 at the lower end of the threaded bore 52, that is mounted above the first check valve 5 approximately centrally in the threaded bore 52. This can be seen particularly well in FIGS. 4 (B) and 4 (C). The mandrel 53a may be hollow so that the fluid M exiting the reservoir la may also flow therethrough, or it may be solid, so that the fluid M flows around it and the land 54. In the above-mentioned case where the spike 53a is provided for piercing a valve-like or rubber-like termination or rubber member 51a at the free end of the channel of the threaded pin 51, the spike 53a must be hollow since the fluid in this case can only enter through the mandrel 53a in the dispenser lc.

In this context, it should be mentioned that the length of the threaded pin 51 and the depth of the bore 52 are preferably matched to each other in all versions, that after the complete screwing of the threaded pin 51 into the bore 52, the free end of the threaded pin 51 on the web 54th or the immediately below first check valve 5 rests, so that the reservoir la is fluid-tightly connected to the dispenser lc. This applies accordingly, of course, in the case of a plug or bayonet connection.

FIG. 5 shows a second embodiment of the connection region, in a side view in FIG. 5 (A), in a plan view of the internally threaded bore 52 in FIG. 5 (B), and in FIG. 5 (C) a perspective view in FIG this hole. Identical or mutually corresponding parts as in FIG. 4 are again provided with the same reference numerals, so that in this respect a further explanation can be dispensed with.

In contrast to FIG. 4, in this second embodiment, instead of the mandrel 53a, a pin 53b is provided, which is preferably traversed by a cannula or a tube (see in particular FIG. 5 (B)), so that the fluid can pass therethrough , The pin 53b is in turn held by a web 54 which extends at the bottom of the bore 52 immediately above the first check valve 5 through the bore 52. This embodiment is particularly advantageous when the closure 51b is formed at the lower end of the threaded pin 51 by a ball or a pre-punched disc or a plate 51b. So that this ball, disc or the plate or a part thereof can not enter into the cannula or into the tube of the pin 53b after screwing the threaded pin 51 into the threaded bore 52 and thereby obstruct the outflow of the fluid, its mouth preferably has a diameter which is smaller than the diameter of the channel in the threaded pin 51. This is indicated in Figure 5 (A) by the shoulder on the pin 53b. By contrast, the section of the pin 53b located below the shoulder has essentially the same diameter as the channel in the threaded pin 51, so that the fluid enters the delivery device lc mainly through the cannula or the tube in the pin 53b. FIG. 6 shows a third embodiment of the connection region, again in FIG. 6 (A) in a side view, in FIG. 6 (B) in a plan view of the internally threaded bore 52, and in FIG. 6 (C) a perspective view. see view into this hole. The same or corresponding parts as in Figures 4 and 5 are again provided with the same reference numerals, so that it can be dispensed with a further explanation.

In this third embodiment, the edge of the opening of the cannula or tube passing through the pin 53c has a roughness or roughness shaped so that the shutter 51c in the threaded pin 51 or parts thereof can not be placed sealingly on this opening when the threaded pin 51 is screwed into the threaded bore 52. This ensures an always undisturbed outflow of the fluid from the reservoir 1a into the dispenser lc. The closure 51c itself may in turn be a ball or pre-punched plate or foil, as explained above.

Finally, FIG. 7 shows a fourth embodiment of the connection region, again in FIG. 7 (A) in a side view, in FIG. 7 (B) in a plan view of the bore 52 provided with the internal thread, and in FIG. 7 (C) a perspective view View into this hole. The same or corresponding parts as in Figures 4 to 6 are again provided with the same reference numerals, so that it can be dispensed with a further explanation. In contrast to the embodiments according to FIGS. 4 to 6, in this fourth embodiment the means for opening the channel running in the threaded pin 51 is formed by a blade or cutting edge 53d, which preferably tapers towards its free end and one or more Tips forms. With these, when inserting the threaded pin 51 into the threaded bore 52, a circular region is cut out of the closure 51d and this is thereby opened. This embodiment is particularly advantageous when the closure 51d is formed at the end of the channel by a film. Also in this embodiment, as in all other embodiments, instead of the screw in turn a plug or bayonet connection can be provided.

The blade or cutting edge 53 d is in turn attached to a web 54, the is located at the bottom of the threaded bore 52.

FIG. 8 shows various embodiments of the dispensing device 1c, which are provided in particular for dispensing the fluid in the form of a spray S and relate to different dispensing directions. Identical parts and components of the delivery device 1c according to FIG. 3 (C) are also designated in FIG. 8 with the same reference numbers, so that a further explanation can be dispensed with in this respect. In the case where the fluid is to be discharged in the form of a spray S, the opening of the drain tube 4 is provided with a nozzle 42 corresponding to the consistency of the fluid therefor.

In contrast to the embodiment of the dispensing device 1c according to FIG. 3 (C), in the dispensing devices 1c shown in FIG. 8, the spring 8 acts as an example between the first stop 91a and the piston 9 inside the pump tube 7. However, the spring 8 could also be arranged at one of the other two, explained above. The direction of release of the spray S may be as shown in Figure 8 (A) in the longitudinal direction of the liquid pumping apparatus or in Figures 8 (B) and 8 (C) at an angle in the lateral direction thereto, for example at about 45 ° or 90 ° or any one of take another angle. With such lateral delivery, the corresponding laterally directed portion of the pumping tube 7 may be external to the dispenser lc as shown in Figure 8 (B) or as shown in Figure 8 (C).

In this context, it should be noted that due to the construction of the pump unlike conventional pump guards, the liquid pump apparatus can be used in any position, even upside down, and in any direction for delivering the fluid, and it can also operate reliably regardless of gravity and air pressure ,

Of course, the dispensing devices shown in FIG. 8 are also suitable for dispensing the fluid in flowing form when dispensing with the use of the nozzle 42 and instead, for example, using an injection needle (see FIG. 10) or a pin. sel is attached to the opening of the drainage tube 4, as explained above.

In all embodiments or embodiments, the second check valve 6 is preferably always arranged directly on the opening of the drainage tube 4 or the nozzle 42. This ensures that during and in particular after the delivery of fluid only minor residues thereof can remain in the region of the opening of the drainage tube 4 or the nozzle 42, so that dripping is prevented. In addition, these minor residues, if they dry there, can be easily removed, so that a possible clogging of the opening of the drain tube 4 and the nozzle 42 can be easily eliminated.

FIG. 9 shows a third embodiment of the liquid pump device equipped with a pump lever 121. The pump lever 121 is fixed to a first end of the housing or the reservoir 1 of the liquid pump device by gluing, welding or otherwise. The opposite second end of the pump lever 121 has two legs 121 a, which form a U-shape, between which the attached to the operating knob 12 threaded sleeve 11 is attached.

The pump mist 121 is preferably biased in one direction to the outside, so that it biases the piston 9 by pulling on the operating knob 12 against the first stop 91a. In this way, the pump lever 121 may replace the function of the spring 8 (in particular if the fluid is relatively thin liquid) or at least support the action of the spring 8. This latter case is particularly advantageous when the fluid is relatively viscous.

To actuate the liquid pumping device, a user presses on the pump lever 121 and thus moves the piston 9 against the force of the pump lever 121 and possibly the above-described acting on the piston 9 spring 8 into the pump tube 7 in order to thereby fluid from the liquid pump device leave. Thereafter, the piston 9 is guided back against the first stop 91a by the force of the pump lever 121 and optionally the force of the spring 8, so that the pump tube 7 as described above fills again with fluid M from the reservoir 1. In this embodiment as well, a brush or an injection needle can again be arranged on the drainage tube 4, or the drainage tube 4, as described with reference to FIG. 8, is provided with a nozzle for producing a spray mist.

The discharge of the fluid or spray can, as shown in Figure 9 (A) and (B), in the axial direction (longitudinal direction) of the liquid pump apparatus, or even in an embodiment as shown in Figures 8 (B) and (C). in a lateral direction at an angle of, for example, about 90 ° or at any other angles laterally to the axial direction.

Such a (fourth) embodiment is shown by way of example in FIG. 10, in which the same parts and components as in the other figures are again designated by the same reference numerals, so that a further explanation can be dispensed with. By way of example, in this embodiment, the fluid M is not discharged through the end cap 4 or the nozzle 42, but by means of an injection needle 43. This embodiment has the advantage that it is very easy to handle due to the lateral operation of the pump and the laterally opposite injection needle 43 and occurs in particular for vaccinations and for use in the dental field. Finally, Fig. 11 shows a fifth embodiment of the liquid pumping apparatus which, like the first and second embodiments, is in three parts, i. is composed essentially of the reservoir la, the housing lb and the dispenser lc according to the above explanations in connection with Figures 2 and 3. Like parts and components as in these figures are again denoted by the same reference numerals.

The reservoir la can be both a solid container according to Figure 2, as well as a flexible container such as a tube according to Figure 3. An essential difference from the first and second embodiments is that in the fifth embodiment according to FIG. 11, a pump lever 121 according to FIGS. 9 and 10 is provided for actuating the liquid pump device. There this pump lever 121 on the one hand on the housing lb and on the other hand, as described above, must be attached to the operating knob 12, a plug connection 31a, 31b is preferably provided instead of a screw, with which the housing lb is attached to the dispenser lc, wherein corresponding parts This connection device in turn in the region of the opening of the housing lb or on the outer circumference of the dispenser lc are. If a plug connection is provided, conventional corrugations 31a, 31b may be provided on the opening of the housing 1b or on the outer circumference of the dispenser lc, which engage in the mating of the two parts 1b, 1c.

In this embodiment, therefore, the reservoir 1a is first attached to the dispenser lc as described above and as shown in Figure 11 (A). Subsequently, the housing lb is attached to the dispenser lc and locked at this, at the same time the attached to the operating knob 12 threaded sleeve 11 is guided between the two legs 121a of the pump lever 121. This condition is finally shown in Fig. 11 (B).

Claims

claims

A fluid pump apparatus for metering fluid, comprising a fluid delivery means (lc) having a manually operable pump (5 to 12) for discharging the fluid, a reservoir (1a) containing the fluid contains fluid to be dispensed (M) and interchangeable with the dispenser (lc) can be fastened, and an outer housing (lb), which surrounds at least the reservoir (la) and on the dispenser (lc) is releasably attachable.

2.) Liquid pump device according to claim 1,

in which the storage container (1a) can be fastened to the delivery device (1c) by means of a plug-in or bayonet or screw connection (51, 52), the delivery device (1c) having a device (53a-53d) for opening a closure (51a) 51d) on the storage container (1a) and for establishing a fluid connection between the storage container (1a) and the delivery device (1c) when the storage container (1a) is fastened to the delivery device (1c).

3.) Liquid pump device according to claim 1,

in which the outer housing (1b) can be fastened to the delivery device (1c) by means of a plug-in or bayonet or screw connection (3a, 3b; 31a, 31b).

4.) Liquid pump device according to claim 1,

in which the pump (5 to 12) can be actuated manually in a direction substantially perpendicular to the longitudinal extent of the liquid pump device by pressing in an actuating knob (12).

5.) Liquid pump device according to claim 4,

in which a pump lever (121) is provided which is fastened at one end to the housing (1b) and at the other end to the actuation button (12) and is articulated or flexible in such a way that the pump (5 to 12) by pressing on the lever (121) is operable.

6.) Liquid pump device according to claim 1,

in which the storage container (la) in the form of a solid container with a piston (2) or in the form of a tube.

7.) Liquid pump device according to claim 1,

in which the discharge device (lc) for the fluid (M) has a pump tube (7) extending with its length substantially perpendicular to the longitudinal extension of the liquid pump device, in which a volume for the hermetically sealed piston (9) is provided Fluid (M) is delimited, wherein the piston (9) for changing this volume along the pump tube (7) is displaceable, and wherein the fluid (M) at an increase in the volume through a first check valve (5) from the reservoir (la) is sucked into this volume and at a reduction of the volume by a second check valve (6) from this volume and from the dispenser is discharged.

8.) Liquid pump device according to claim 1,

in which the fluid can be delivered in the direction of the axial longitudinal extent of the liquid pump device or in a direction to the side.

9.) Liquid pump device according to claim 1,

in which the fluid can be delivered through a nozzle (42) to produce a spray (S) or through an injection needle (43) or applied by means of a brush.

10.) Liquid pump device according to claim 2,

in which the dispensing device (lc) has a threaded bore (52) into which a corresponding threaded pin (51) of the reservoir (1a) can be screwed.

11.) Liquid pump device according to claim 10,

wherein the means (53a-53d) for opening the shutter (51a-51d) is disposed in the threaded bore (52).

12.) Liquid pump device according to claim 11,

wherein the means for opening the shutter (51a-51d) is in the form of a spike (53a) which is either solid or hollow so that the fluid can enter therethrough into the dispenser (lc).

13.) Liquid pump device according to claim 11,

wherein the means for opening the shutter (51a-51d) is in the form of a pin (53b; 53c) through which passes a cannula or tube so that the fluid can pass therethrough into the dispenser (lc).

14.) Liquid pump device according to claim 13,

wherein the opening of the pin (53c) is provided with unevenness or roughness such that the shutter (51a-51d) or parts thereof can not sealingly rest on the opening of the pin (53c) after the reservoir (1a ) has been attached to the dispenser (lc).

15.) Liquid pump device according to claim 11,

wherein the means for opening the shutter (51a-51d) is formed in the form of a blade or a blade (53d) which tapers towards its free end.

16) Liquid pump device according to claim 11,

wherein the means for opening the shutter (51a-51d) is secured to a web (54) extending through the threaded bore (52).

17.) A storage container for use with a liquid pumping apparatus according to claim 1, with a fastening device for the dispensing device, wherein the fastening device has a closed with a closure (51 a-51 d) opening for discharging the fluid contained in the reservoir (la) (M).

18.) reservoir according to claim 17,

wherein the shutter (51a-51d) is formed so as to be opened by the means (53a-53d) for opening a shutter (51a-51d) disposed on the discharger (lc) of the liquid pump apparatus according to claim 2 the storage container (la) is attached to the dispenser (lc).

19.) reservoir according to claim 17,

which is formed in the form of a tube or a solid container (la).