DE19713720A1 - Pump dispenser for dosed delivery of fluid, viscous or paste type substances - Google Patents

Abstract

The dispenser has two pump sections, the second section(160) being lockable in a position of minimum volume of the pump chamber(180), and means(420) are provided to keep the first valve(190) in the locked position of the second pump section. The second pump section form-locks on the container(110) on the first pump section(150). The locking is carried out by means of a bayonet connection.

Description

The invention relates to a pump dispenser according to the preamble of claim 1.

Such pump dispensers are from practice for metered discharge of liquid, viscous or pasty substances from a container knows, such as for soaps or body lotions. This got Pump dispensers pump via a pump chamber, the entrance and exit is provided on the aisle side with a valve from one to the other Bottom of a container leading riser substances into a beyond Pump chamber arranged further riser pipe, to which there is a discharge pipe connects. Pump dispensers have recently become known at a lock against unintentional pumping seen is that the discharge tube on the other side protrudes with it the discharge tube is pivoted, causing a depression of the upper Part of the pump by means of stops u. The like is prevented. This is the leakage of substances due to a pump actuation ver  prevents, but there is still a risk that, for example Substance escapes due to a tilted transport position. Because on reason pressure equalization between the pumping chamber and the interior of the container It is possible that under the influence of gravity this the valve separating the two areas and the pump chamber is then filled. The second valve is also overcome, so that substances can escape from the pump dispenser.

Another disadvantage of donors known from practice is the number of strokes that are required to make a certain amount To discharge substance. Other donors known from practice are to discharge large quantities of substance with an elongated pump large stroke equipped; such pumps are not very aesthetic and uncomfortable to handle, which is why the acceptance by the consumer is low.

The object of the invention is to provide a pump dispenser Preamble of claim 1 to create the in a transport position prevents the escape of substances.

This task is performed according to the characteristic part of the Claim 1 solved.

According to the invention, the second pump part is in one position minimum volume of the pump chamber lockable, d. H. in its regard lowest position on the first pump part. It is in this position tion means are provided which keep the first valve securely closed, to prevent substance from entering the inside of the container To prevent the pump chamber. This is not just an accidental one Pump actuation of the pump dispenser prevented, but also beyond a creeping out of the substances from the container, so that the position of the pump dispenser on delivery when the second pump part is in the locked position, no effect on the Leakproofness of the container closed by the pump dispenser having. Another advantage is that even after the Using the pump dispenser, a container with body lotion or the like can be closed again drip-proof. Because the second Pump part in a position of minimum volume of the pump chamber arre animal position, this position is advantageously also  by one position of maximum emptying of the pump chamber. This is up to Partially as a result that even when transported in private luggage of a consumer where the container is subject to many changes in position can be a gradual leakage of the substance from the pump chamber is largely excluded beyond the second valve.

According to a particularly preferred development, as white tere precautionary measure of the mouth area of the second Ven til subsequent discharge tube in the position of minimum volume Pump chamber can also be arranged such that the mouth area directly opposite the shoulder of the container on which the Pump dispenser is located. This will add another lock provided that the accidental dripping of substance from the loading rich beyond the pump chamber. Furthermore it is immediately obvious to the user that a pump stroke is not is possible because the required gap between the mouth area of the Discharge tube and the shoulder of the container is almost zero. Ge then violent attempts to operate the pump dispenser are omitted partly.

The dispenser according to the invention is advantageously equipped with a Pump chamber provided, which has a large cross section and a piston area area for the application of the pressure in the order of the cross section having. With a stroke of no more than 15 mm, the dispenser enables then the discharge of a large volume of substance. The first pump part preferably dresses the interior of a container protruding from the container head and uses its entire volume, creating a com compact design of the dispenser. Alternatively, the pump chamber can also can be arranged above or below the container head, whereby the use of larger cross sections than that of the container head is made possible. Such a dispenser with a small axial Displacement carries a large volume of approximately 4.5 to 5 ml of substance, enables the bottler of the substance to also provide larger portions, which can be precisely dosed with a single depression of the dispenser. If a larger volume is desired, the container head can expediently be trained broader. In order to make this aesthetic, the  Dispenser preferably with a container head at least partially concealing cover member.

The pump dispenser according to the invention is inexpensive to manufacture bar and is also suitable as a disposable part. Its components can be realize in a simple manner by means of injection molding technology, wherein it is possible to add several functional units in one part each tegrate, resulting in further cost savings. The assembly of the pump dispenser according to the invention is simple and can be done by the simplest Assembly machines or unskilled workers. Here it is before partially possible, the components of the pump dispenser are not together delivered to a bottler in the assembled state and after filling the container ters.

Advantageously, the means for keeping the first valve arranged on the second pump part so that they in the Minimum volume position can be brought into contact with each other and in particular form a striking lock that the valve member of the first valve prevents it from moving towards the pump chamber relocate. These stops and the first valve are expediently aligned with each other in the center, so that when the two pumps are rotated penteile relative to each other through the secure hold of the first valve this means of keeping closed remains. This is how it is done partially possible, either locking the second pump part the first pump part or on the container by rotation or to solve. A bayonet is expediently used for the locking closure arrangement or other clamping or locking arrangement provided, in particular such that the second pump part by about 20 ° to 180 °, preferably rotated 90 ° relative to the first pump part, e.g. B. um the restoring force of a spring tensioned by pressing down chern.

For the production of the components of the invention Pump dispensers are particularly suitable for injection molding technology, the one Advantageously uses a plurality of plastics, preferably selected from the group comprising polyolefins, polyethylene, polypro pylene, polyoxymethylene, acetal resin, high density polyethylene. Hereby  are the components in bulk in a particularly cost-effective manner production can be manufactured and allow large quantities to be produced manufacturing tolerances inexpensively.

According to a particularly advantageous further development of the Erfin the valve member belonging to the relevant pump part created together with this in an injection molding process. According to a first Variant this can be done by providing a flap valve that is hinged to the associated pump part via a film hinge and which accordingly has a bias; the flap can by ge slight deformation can be folded between two boundaries, which on the one hand define a valve seat and on the other hand an on Impact for the stroke of the valve member when opening. But it is also possible Lich, together with appropriately trained cores a valve member to inject with the pump part, which when removing the cores from the Pump part main body is torn off, but within a limited th area axially to release or to close a with the Pump part one-piece valve seat is relocatable. In both The above-mentioned cases do not involve assembly work around the valve to be attached to the pump part, so that the handling costs are clear be reduced.

In another advantageous development of the invention the valve is designed as a slotted membrane, which corresponds in a appropriate groove or groove of the pump part is jammed and only at Presence of a pressure gradient in a direction transverse to the pump part Slit deformed into an open position, while the slot otherwise ge remains closed, so that a valve in the manner of a check valve ge create without the need for a displacing valve member. This further development has the advantage that, with an appropriate selection dimensioning of the diaphragm a tolerant production of the pumps parts is permissible, which in the case of the formation of a valve seat otherwise within the pump part due to leakage considerations is not easily considered.

The pump dispenser according to the invention is expediently shown in shaped in an ergonomically particularly favorable manner by the second  Pump part expands into a box-like cover member that - too at least in the locked position - the upper shoulder of the container covered and instead of the shoulders as a top is shaped. On the one hand, this makes it advantageously possible to use the entire Surface of the cover member as a print run, for example for a Palm of a user, for transferring the force to the compress sion of a return spring, and on the other hand becomes an aesthetic overall impression created, which gives the packaged product a special which gives a noble and valuable note. In a particularly preferred Variant is the pump dispenser according to the invention on a non-rotating arranged symmetrical container or in a rotationally symmetrical Containers arranged eccentrically on a container head or both, so that with a rotary movement to release the locking of the first Shoulder of the container facing the mouth of the discharge tube protrudes from the shoulder area so that it is possible for the user his open hand, for example, against the Shell surface of the container brings and below the mouth area positioned. The discharge tube is preferably integral with the Ab deck member formed, d. H. the cover member limits the discharge pipe upwards, so that the cover member in the area of the discharge tube from the outside looks the same as in the other areas. It is possible to To give users a detection aid through a discharge tube to mark colored part or the like.

The discharge channel, the exit of which is the mouth area, he Expediently extends essentially from the main axis of the pump dispenser to the outside; another is expedient vertical channel section formed in the interior of the piston working second pump part facing away from the pressure chamber Side inside the piston.

An inventive and particularly preferred pump part of a donor is created by an injection molding process that the Pump part and the valve member of its integrated valve in one Squirts step and then burns.

Further refinements of the invention are as follows  Description and the dependent claims.

The invention is described below with reference to the accompanying figures Illustrated embodiments illustrated in more detail.

Fig. 1 shows in longitudinal section a container with a first embodiment of a pump dispenser according to the invention.

FIG. 2 shows a cross section through the pump dispenser from FIG. 1 along the line II-II.

Fig. 3 shows in longitudinal section a container with a second embodiment of a pump dispenser according to the invention.

FIG. 4 shows a view of the second pump part from FIG. 3 from the direction of the arrow IV-IV.

FIG. 5 shows an enlarged view of a valve membrane of the second pump part from FIG. 3.

Fig. 6 shows in longitudinal section a container with a third embodiment of a pump dispenser according to the invention.

Fig. 7 shows in longitudinal section a container with a fourth embodiment of a pump dispenser according to the invention.

Fig. 8 shows in longitudinal section a container with a fifth embodiment of a pump dispenser according to the invention.

Fig. 9 shows in longitudinal section a container with a sixth embodiment of a pump dispenser according to the invention.

Fig. 10 shows in longitudinal section a container of a seventh embodiment of a pump dispenser of the invention.

Fig. 11 shows in longitudinal section a container with an eighth embodiment of a pump dispenser of the invention.

Fig. 12 shows in half a longitudinal section of a container with a ninth embodiment of a pump dispenser according to the invention.

FIG. 13 shows an enlarged representation of a section through the sealing lip of the second pump part of the pump dispenser from FIG. 9.

FIG. 14 shows an enlarged view of the valve of the first pump part of the pump dispenser from FIG. 1.

Fig. 15 to 17 show a container with a tenth operation example from a pump dispenser of the invention.

A first embodiment of a pump dispenser 100 according to the invention is shown in FIGS . 1 and 2. In the present exemplary embodiment, the dispenser 100 is mounted on a bottle 110 , of which only the upper area is shown. The bottle 110 has a bottle head 120 projecting from the bottle body, which is cylindrical and near the end 130 has a circumferential projection 140 , the flank of which is directed away from the bottle 110 and whose flank facing the bottle 110 is flat. Before jump 140 is particularly suitable for snapping the pump dispenser 100th On the bottle head 120 near the shoulder of the bottle 110 United cam 450 are provided, which can be seen better in the sectional view of FIG. 2.

The pump dispenser 100 consists of two interacting pump parts, a first pump part in the form of a cylindrical plastic molded body 150 and a second pump part 160 designed as a dispenser head. Both pump parts 150 , 160 are injection molded plastic bodies. The material of both pump parts 150 , 160 is polypropylene. But it is also possible to provide other plastics suitable for injection molding, e.g. B. Polyethylene (PET), Polyoxymethylene (POM), and others.

The first pump part 150 and the second pump part 160 can be displaced relative to one another, the inner lateral surface of the first pump part 150 forming a guide surface for the second pump part 160 comprising a piston. A spring 170 biases the second pump part 160 against the first pump part 150 in an extended position. The first pump part 150 and the second pump part 160 delimit a pump chamber 180 with a volume that can be varied depending on the relative position of the two pump parts 150 , 160 . A first valve 190 is provided in the first pump part 150 , which releases or closes a connection between the contents of the bottle 110 and the pump chamber 180 . The second pump part 160 has a second valve 200 , which opens or closes a passage between the pump chamber 180 and a discharge pipe 210 . With the pump dispenser 100 , it is possible to dispense liquid, viscous or pasty media, which are stored in the bottle 110 , metered in portions through the support tube 210 by actuating the pump dispenser 100 , as will be explained in more detail below.

The first pump part 150 consists of an essentially circular cylindrical sleeve part which is inserted into the bottle head 120 . In order to attach the first pump part 150 to the bottle head 120 , this has a folded-over collar 220 which has the shape of an inverted U in cross-section, one leg of the U being slightly tapered towards the center into the hollow cylinder inner wall of the first Pump part 150 merges, which forms a guide and sealing surface 230 for the second pump part 160 , while the other outer leg of the collar 220 has an annular groove 240 inside, which engages over the projection 140 of the bottle head 120 and the first pump part 150 against the Bottle 110 or the bottle head 120 locked with the projection 140 . The bottom of the U lies against the front end 130 of the bottle head 120 .

A bottom 250 of the first pump part 150 adjoins the surface 230 and forms an angle of approximately 100 ° with the surface 230 . On the side of the bottom 250 facing away from the pump chamber 180 , a pipe socket 260 is formed in one piece with the first pump part 150 , onto which a riser pipe 270 , which leads to the bottom (not shown) of the bottle 110 , can be plugged on or plugged in.

At the end of the lumen of the pipe socket 260 , the first valve 190 is provided in the bottom 250 of the first pump part 150 . The valve 190 shown in more detail in FIG. 14 is a movable sealing element 300 injection molded together with the first pump part 150 , which has an H-like cross section and whose upper and middle area is rotationally symmetrical. The upper legs of the "H" are angled around 45 ° from the central base. In the fully illustrated position, its circumferential outer surface lies on a collar 280 , likewise angled by approximately 45 °, which delimits the opening 290 in the base 250 and defines a valve seat. In this position, the opening 290 in the bottom 250 is closed, ie there is no fluid connection between the contents of the bottle 110 and the pump chamber 180 . In the indicated position of the valve 190 , this is raised relative to the collar 280 forming the valve seat, so that a fluid connection between the interior of the bottle 110 and the pump chamber is formed between the surfaces of the collar 280 which are in contact against one another in the closed state and the angled leg of the valve 190 180 manufactures is. The lower legs of the "H" - these are the narrow ribs 300 a - are angled outwards approximately in the middle of their extension. They abut against the bottom 250 against projections 730 which surround the opening 290 delimited by the collar 280 in order to form a path limitation for the valve member 300 of the first Ven valve 190 .

The first pump part 150 can be produced together with the first valve 190 in a single injection molding process in a particularly favorable manner. For this purpose, a removable core with the counter shape of the running surface 230 including the pump chamber 180 is arranged in a counter shape of the outer contour including a U-shaped anchoring collar 220 and also a counter shape core for the pipe socket 260 . The two sides of the bottom 250 attached cores are designed so that they also include hollow parts in which the legs or the ribs 300 a of the valve member 300 can be formed. About a circumferential film or some connecting webs between projections 730 and ribs 300 a, the Ven tillied 300 is sprayed out. If the cores removed, they exert on the valve member 300 consequently abducted thighs a Zugbewe supply, which in the first pulled-out core results in a stripping off of the valve member 300 and the then extracted core tearing of the valve member 300 of the film result has before the valve member 300 is released due to the resistance of the valve member 300 supported against the area around the collar 280 . It is thus advantageously possible to simultaneously form in the first pump part 150 a first valve 190 with a movable valve member 300 which, with the valve seat designed as a collar 280 , permits or blocks the passage through the base 250 . It goes without saying that the production costs are low due to the production of the first pump part 150 with the first valve 190 in one piece.

The second pump part 160 has a circular cylindrical middle portion 310 , the outer surface of which is designed to be displaced like the piston of a piston-cylinder unit along the running surface 230 of the first pump part 150 , which forms the guide surface of the cylinder. Furthermore, the two pump parts 150 , 160 seal the pump chamber 180 to the outside in the manner of a labyrinth. For this purpose, ring-shaped projections and recesses 490 are formed at the lower end of the section 310 , which form a seal against the pump chamber 180 with the running surface 230 .

The middle section 310 is concentrically surrounded at a distance by an annular outer section 320 , which is also circular-cylindrical and is formed coaxially with the middle section 310 or the first pump part 150 , the lower end of the outer section 320 having two claws 460 , which are clipped over the outer leg of the collar 220 of the first pump part 150 . The outer part 320 and the middle part 310 of the second pump part 160 are delimited at the top by a cover member 330 and connected to one another. From the cover member 330 has a dome-shaped contour when viewed from the outside, which extends substantially in the manner of a hemisphere such that the area of the bottle head 120 and the shoulder of the bottle 110 surrounding the bottle head are covered by the cover member 330 . The discharge tube 210 is formed in one piece with the cover member 330 of the second pump part 160 .

The discharge tube 210 has an angled course, proceeding from a mouth region 340 , and consists of a first channel section 350 delimited by the cover member 330 , the outward-facing wall of which is integrally formed by the cover member 330 , the first channel section 350 being in one The second channel section 360 provided perpendicularly in the middle section 310 opens out. The vertical right channel section 360 extends from the cover member 330 to a bottom 370 of the second pump part 160 and is delimited on the one hand by the cylindrical wall of the middle section 310 and on the other hand by a partition wall 380 which defines the interior of the middle section 310 of the second pump section 160 divides vertically into two rooms, of which the smaller room forms the channel section 360 . The discharge pipe 310 formed from the first channel section 350 and the second channel section 360 is limited against the pump chamber 180 by a second valve 200 in the manner of a check valve, which in its physical configuration is designed like the first valve 190 of the first pump part 150 and that with a valve member 390 opens or blocks an opening in the second channel 360 . In its raised position, the valve member 390 releases a fluid connection between the pump chamber 180 and the discharge pipe 310 , in its lowered position the valve member 390 bears against the valve seat 400 , and the passage is blocked.

The outer part 320 and the middle part 310 of the second pump part 160 laterally delimit an annular chamber 410 , in which the spring 170 is supported at the top against the cover member 330 and at the bottom against the collar 220 and prestresses the pump parts 150 , 160 against one another. The ring chamber 410 is advantageously not readily accessible in the assembled state of the two pump parts 150 , 160 . The spring 170 is a conical spiral steel spring, but could also be cylindrical or a leaf spring. The annular chamber formed between the two pumps 150 , 160 enables the arrangement of the spring 170 for the mutual pretensioning of the two parts outside of an area which is flowed through by the medium, so that even with prolonged storage or penetration with air there is no lump formation or gluing the function of Spring affected. In addition, the mate rial of the spring can not affect the medium to be conveyed, for. B. by corrosion or chemical exchange processes, so that the pump dispenser 100 is also net for the metered discharge of food or pharmaceuticals. This makes it possible to provide the simplest structural springs and materials for the prestressing, which means that the manufacturing costs of the dispenser can be kept low.

The bottom 370 of the middle section 310 of the second pump part 160 has a web region 420 projecting vertically downwards, which is axially symmetrical and dimensioned such that it can essentially cooperate with the upper legs of the "H" of the valve 190 as a transport lock, such as will be explained further below. The apex area covering the middle part 310 is closed by a cover 430 which is articulated on the cover member 330 by a film hinge 440 which is integral with the cover member 330 . The cover 430 spans the entire middle section 310 and part of the discharge tube 310 in the region of the second channel section 360 and is snapped in a fluid-tight manner with the cover member 330 , so that a spherical cap closed to the outside results. The cover member 330 is thus designed as a pressure area suitable for the handball for actuating the pump dispenser 100 .

The second pump part 160 is now manufactured as follows in the injection molding process: in the area of the middle section 310 , two pull-out cores are provided, between which the partition 380 will be formed. Another extractable core with a curved course is provided to form the first channel section 350 of the discharge tube 210 . The cover 430 is spread apart during manufacture from the middle section 310 and is only pivoted after the manufacture position along the film hinge 440 and is clamped with the cover member 330 in a fluid-tight manner, as a result of which the two aforementioned cores can be easily removed. The second valve 200 is formed in a corresponding manner to the first valve 190 by the core for the second channel 360 tearing the valve member 390 from its attachment to the common injection-molded second pump part 160 upon removal, as a result of which it becomes axially movable. After the injection molding process, the cores are removed, and the second pump part 160 with a second valve 200 , which is injection-molded from one piece, is obtained inexpensively.

To assemble the pump dispenser 100 , a riser tube 270 is first plugged onto the pipe socket 260 , which extends to the bottom of the bottle, and then the first pump part 150 is placed on the bottle head 120 and the projection 140 is snapped onto the collar 220 . After the first pump part 150 is connected to the bottle 110 , the second pump part 160 is plugged with its middle part 320 into the first pump part 150 and its outer part 330 outside the first pump part 150 onto the first pump part 150 , the ones in the annular chamber 410 previously arranged spring 170 is compressed. The first pump part 190 is fixedly connected to the bottle 110 , while the second pump part 160 can be moved up and down relative to the first pump part 150 between a first and a second end position. It should be noted that capillaries, not shown, the number and cross-section of which can be determined depending on the viscosity of the medium to be conveyed, connect the outside of the bottle 110 to the inside of the bottle 110 . These capillaries are in the inner surface of the collar 220 of the first pump part 150 , for. B. formed as grooves such that they allow a supply of ambient air between the collar 220 and bottle head 120 , and are used in particular for pressure compensation for medium conveyed out of the bottle 110 .

The pump dispenser assembled in the above manner now works as follows. In the unloaded state, the second pump part 160 is in its upper stroke position due to the preload by the spring 170 . If the second pump part 160 is shifted downward by pressing down, for example by placing a user's palm on the cover member 330, the valve member 390 of the second valve 200 is pressed out of its seat 400 due to the compression exerted on the pump chamber 180 , and the contents of the pump chamber 180 (first air, later medium) pressed into the discharge pipe 310 , while the valve member 300 of the first valve 190 is pressed against its seat 280 . In addition, the valve member 390 is mechanically forced upwards in the lower end position of the second pump part 160 by resting on a part of the bottom 250 and is thus opened completely continuously. For this purpose, the base 250 can have an elevation that is formed in relation to the valve 200 . If the pressure on the second pump part 160 is released, this is shifted again from its lower stroke position to its upper stroke position due to the spring force of the spring 170 , as a result of which the valve member 390 of the second valve 200 due to the negative pressure prevailing in the pump chamber 180 and due to the dead weight of the the valve member is displaced into its closed position 390, is sucked out from its closed position while the valve member 300 of the first valve 190 and enters due to the self-adjusting with the stroke in the pump chamber 180 under pressure medium from the riser 270 into the pump chamber 180th The negative pressure inside the bottle 110 is then compensated for by supplying ambient air through the capillaries, which are not shown. After several strokes, the discharge tube 210 is also filled with medium, and this medium then emerges via the mouth region 340 .

When the second pump part 160 is in its lower position, it can be z. B. are rotated about 90 °, the claws 460 provided at the ends of the outer part 320 latching against the locking cams 450 of the bottle. The web area 420 then presses the valve member 300 of the first valve 190 into the closed position, so that there is a leak-proof transport position, which can also be tested as a delivery position with an integrity seal. The end-side claws 460 of the outer part 320 can, however, also be guided like cams in an extension of the outer U-shaped leg of the collar 220 of the first pump part 150 , as indicated in FIG. 1 on the left-hand side, as a result of which twisting of the second pump part against the first pump part in a different than the safe lower stroke position is prevented.

In the present exemplary embodiment, the bottle 110 is essentially of elliptical cross section, as is the foot of the cover member 330 . This makes it possible to face the mouth region 340 of the discharge tube 210 in the transport position of the shoulder of the bottle 110 and to let it protrude over the shoulder of the bottle 110 in the working position, as a result of which a user's hand can be held beneath the mouth region 340 in a favorable manner. However, it is also possible to form the cover member 330 with a different symmetry than the bottle 110 or to offset the axis of rotation with respect to the axes of the pump dispenser 100 and the bottle 110 . The pump dispenser 100 according to the invention consists only of four parts which can be produced cost-effectively, namely the first pump part 150 as the pump cylinder, the second pump part 160 as a movable pump piston, the spring 170 and the riser pipe 270 , which can be plugged together in a simple manner. The assembly can thus also be carried out cost-effectively at the bottler of the bottles. The actuation is simple and reliable. The shape of the cover member 330 gives the entire unit 100 an elegant and hygienic look.

FIGS. 3, 4 and 5 show another embodiment of a pump dispenser 101 of the invention. The same parts as in the pump dispenser 100 are identified by reference numerals incremented by one.

The pump dispenser 101 consists of two interacting pump parts, a first pump part in the form of a cylindrical plastic molded body 151 and a second pump part 161 designed as a dispenser head made of plastic injection molding. The material of both pump parts 151 , 161 is polypropylene. But it is also possible to provide other plastics suitable for injection molding, e.g. B. polyethylene (PET), polyoxymethylene (POM) and others.

The first pump part 151 and the second pump part 161 can be displaced relative to one another, the inner lateral surface of the first pump part 151 forming a guide surface for the second pump part 161 comprising a piston. A spring 171 biases the second pump part 161 against the first pump part 151 in an extended position. The first pump part 151 and the second pump part 161 delimit a pump chamber 181 with a volume that can be changed depending on the relative position of the two pump parts 151 , 161 . A first valve 191 is provided in the first pump part 151 , which releases or closes a connection between the contents of the bottle 111 and the pump chamber 181 . The second pump part 161 has a second valve 211 , which releases or closes a passage between the pump chamber 181 and a discharge pipe 211 . With the pump dispenser 101 , it is possible to dispense liquid, viscous or pasty media, which are stored in the bottle 111 , metered in portions through the support tube 211 by actuating the pump dispenser 101 , as will be explained in more detail below.

The first pump part 151 consists of an essentially circular cylindrical sleeve part which is inserted into the bottle head 121 . In order to fasten the first pump part 151 to the bottle head 121 , this has a folded collar 221 , which has the shape of an inverted U in cross section, the one leg of the U under execution of a slight taper towards the center into the inner wall of the hollow cylinder passes over the first pump part 151 , which forms a guide and sealing surface 231 for the second pump part 161 , while the other outer leg of the collar 221 has an annular groove 241 on the inside, which engages over the projection 141 of the bottle head 121 and the first pump part 151 against the Bottle 111 or the bottle head 121 locked with the projection 141 . The bottom of the U lies against the front end 131 of the bottle head 121 .

A bottom 251 of the first pump part 151 adjoins the surface 231 and forms an angle of approximately 100 ° with the surface 231 . On the side of the bottom 251 facing away from the pump chamber 181 , a pipe socket 261 formed integrally with the first pump part 151 is formed, onto which a riser pipe 271 , which leads to the bottom (not shown) of the bottle 111 , can be plugged on or plugged in.

The first valve 191 closes the opening 291 of the first pump part 151 by means of a slotted silicone membrane 471 , the jaws provided on both sides of the slit being pressed together under pressure in the pump chamber 181 in such a way that a fluid connection between the interior of the bottle 111 and the pump chamber 181 is prevented , while they are pressed in an oppositely directed pressure distribution and release a passage for the medium by enlarging the slot. The valve 191 thus works like a check valve. The silicone membrane 471 is securely held in a clamping unit of the first pump part 151 . Fig. 5 shows an embodiment of a silicone membrane 471st

The first pump part 151 is produced from an injection-moldable plastic material in a conventional manner. Subsequently, the silicone membrane 471 is fastened in slots recessed for this purpose during injection molding in such a way that the silicone membrane 471 is held clampingly. Alternatively, it is possible to inject the silicone membrane 471 in a two-component injection molding process or to assign it in the manufacturing tool for the first pump part 151 before the injection molding process. The membranes 471 , 481 are preferably fastened on the pressure side of the pump chamber 181 in order to simultaneously apply the pressure to the membrane on its holder. This reduces the risk of the membrane tearing out.

The second pump part 161 has a circular cylindrical middle portion 311 , the outer surface of which is designed to be displaced like the piston of a piston-cylinder unit along the running surface 231 of the first pump part 151 , which forms the guide surface of the cylinder. Furthermore, the two pump parts 151 , 161 seal the pump chamber 181 to the outside in the manner of a labyrinth. For this purpose, annular projections and recesses 491 are formed at the lower end of the section 311 , which form a seal against the pump chamber 181 with the running surface 231 .

The middle section 311 is concentrically surrounded at a distance by an annular outer section 321 , which is also circular cylindrical and is coaxial with the middle section 311 or the first pump part 151 , the lower end of the outer section 321 having two claws 461 which are clipped over the outer leg of the collar 221 of the first pump part 151 . The outer part 321 and the middle part 311 of the second pump part 161 are delimited at the top by a cover member 331 and connected to one another. From the cover member 331 has a dome-shaped contour when viewed from the outside, which extends essentially in the manner of a hemisphere such that the area of the bottle head 121 and the bottle head surrounding shoulder of the bottle 111 are covered by the cover member 331 . A discharge pipe 211 is formed in one piece with the cover member 331 of the second pump part 161 .

The discharge tube 211 has an angled course, starting from a mouth region 341 , and consists of a first channel section 351 , delimited by the cover member 331 , the outward wall of which is integrally formed by the cover member 331 , the first channel section 351 being perpendicular The second channel section 361 provided in the middle part 311 opens out. The vertical right channel section 361 extends from the cover member 331 to a bottom 371 of the second pump part 161 and is delimited on the one hand by the cylindrical wall of the middle section 311 and on the other hand by a partition 381 which defines the interior of the middle section 311 of the second pump section 161 divides vertically into two rooms, of which the smaller room forms the channel section 361 . The discharge pipe 311 formed from the first channel section 351 and the second channel section 361 is limited against the pump chamber 181 by a second valve 201 in the manner of a check valve.

The outer part 321 and the middle part 311 of the second pump part 161 laterally delimit an annular chamber 411 in which the spring 171 is supported at the top against the cover member 331 and at the bottom against the collar 221 and prestresses the pump parts 151 , 161 against one another. The ring chamber 411 is advantageously not readily accessible in the assembled state of the two pump parts 151 , 161 . The spring 171 is a conical spiral steel spring, but could also be cylindrical or a leaf spring.

The apex area covering the middle part 311 is closed by a cover 431 which can be pivoted on the cover member 331 via a film hinge 441 which is integral with the cover member 331 . The cover 431 spans the entire central portion 311 outside of the discharge tube 311 , and is snapped with the cover member 331 , so that there is an outwardly closed cap.

The second valve 201 of the second pump part 161 also has if as a valve member a silicone membrane 481 , which also functions as a check valve by opening at a positive pressure drop between the pump chamber 181 and the discharge pipe 211 and closing in the opposite case, so that a Backflow of medium from the discharge tube 211 in the pump chamber 181 is prevented.

The bottom 371 of the second pump part 161 has a gradation, as can also be seen in FIG. 4. The bottom 371 consists of a central region 371 a, which is planar and is essentially designed so large that it can cover the opening 291 and thus the part of the first valve 191 which is accessible from above. Peripherally of the region 371 a of the base 271 of the peripheral region 371 extends upward b angled towards and terminates in a formed in the outer edge region of the base 371 channel 371 c, which is substantially flush with the level of the second valve the two hundred and first Due to the nature of the formation of the bottom 371 , it is possible to let the area 371 a in the deepest stroke position of the piston 311 strike at the bottom 251 of the first pump part 151 , thereby causing the claws 461 to engage with locking cams 451 , e.g. B. for a secure position for the transport of the bottle, a gradual discharge of fluid from the inside of the bottle 111 is prevented.

The production of the second pump part 161 as an injection molded part is simple to carry out. Compared to the pump part 160 , the shaping is simpler, because it is possible to provide the core for the second channel section 361 from below, so that the area that must be spanned by the cover 431 in the cover member 331 is somewhat smaller. Leakage problems that must be taken into account in the exemplary embodiment from FIG. 1 at the transition from cover 430 to cover member 330 in the region of the discharge tube 210 are thereby avoided. The second pump part 161 can also be easily implemented by injection molding with the shape of the base 271 . Then the silicone membrane 481 is clamped in the area of the bottom 291 .

By plugging the first and the second pump parts together, an easy-to-use pump dispenser 101 is created , which can also be manufactured inexpensively. The pump dispenser 101 thus consists of six parts, namely the first pump part 151 , the second pump part 161 , the spring 171 , the riser pipe 271 , the first silicone membrane 471 and the second silicone membrane 481 . The membranes can already be connected to the pump parts before they are delivered to the customer, so that only four parts need to be taken into account for the delivery when forming the pump dispenser 101 .

The pump actuation takes place as with the pump dispenser 100 and is therefore no longer explained in detail.

Another embodiment of a pump dispenser 102 according to the invention is shown in FIG. 6. The same parts as in the pump dispenser 100 are designated by two incremented reference numerals.

The first pump part 152 is identical to the first pump part 150 from FIG. 1 and is therefore not explained in more detail in its construction and manufacture.

The structure of the second pump part 162 corresponds to that of the second pump part 160 from FIG. 1, but the second valve 202 is designed as a slotted silicone membrane 482 as in FIG. 3. The Sili konmembran 482 is pressed with the bottom 372 and limits the discharge pipe 212 from the pump chamber 182nd As in Fig. 3, the overwhelming part of the middle part 312 is hollow and closed by a cover 432 , which is pivotable about the film hinge 442 , ge. To lock the first valve 192 , web areas 422 are again provided on the bottom 372 of the second pump part 162 . It goes without saying that the hollow area of the middle section 312 is formed in the union for injection molding, but also for reasons of cost. The assembly and operation of the pump dispenser 102 are the same as in the previous embodiments to which reference is made.

In Fig. 7, a fourth embodiment of an inventive pump dispenser 103 is shown. The same parts as in the pump dispenser 100 are designated by three incremented reference numerals.

The first pump part 153 of the pump dispenser 103 is identical to the first pump part 150 of the first pump dispenser 100 in all its components and its manufacture and therefore requires no further explanation.

The second pump part 163 has a central part 313 which, like a piston, can be moved back and forth in the guide surface 233 of the first guide part. The middle section 313 has a central vertical channel section 363 which is connected to a first curved channel section 353 in the region of the cover member 333 . In the bottom region of the middle part 313 , a slotted silicone membrane 483 is provided which, in the manner of a check valve, releases the support tube 213 formed from the first channel section 353 in the second channel 363 against the pump chamber 183 with a downward stroke and with one stroke closes at the top. The silicone membrane 483 is clamped in a cylindrical circular wall 383 , which is provided coaxially and centrally in the middle section 313 , and has an essentially rotationally symmetrical contour which, in the sectional representation shown, is reminiscent of the bumps of a sinus curve, which is of a relatively flat section be connected to each other. In the fla chen lot two intersecting slots are formed, the slotted cross can let a considerable volume pass through in its passage position. The outside of the partition 383 and inside half of the middle part 313 provided ring section is hollow ausgebil det and 373 on the bottom side with a part of the silicone membrane 483 ver closed. However, it is also possible to select a different closure for this area, which is advantageous because there is no longer any fluid connection with the discharge tube 213 from the ring part and the medium settling therein could not be discharged. By closing with the silicone membrane 483 simultaneously with the formation of the second valve 203 , the second pump part can be produced in a simple manner by providing a core for the area inside or outside the partition 383 and a further core for the area between the middle section 313 and outer section 323 or for the first channel section 353 .

The assembly of the first pump part 153 and the second pump part 163 and their actuation correspond to the pump dispensers described in the previous exemplary embodiments. When the claws 463 snap into a transport position (lower lifting position), the central region of the silicone membrane 483 presses into the upper part of the valve member 303 of the first valve 193 , whereby this is biased in the closed position and at the same time the cross recess in the silicone membrane 483 is closed .

Fig. 8 shows a fifth embodiment of a pump dispenser 104 according to the invention in the closed transport position.

The pump dispenser 104 has a first pump part 154 , which is suspended circumferentially on the bottle head 124 of a bottle 114 with a collar 224 . The first pump part 154 has an essentially cylindrical shape, which forms a guide and sealing surface 234 on the inside, along which a second pump part 164 can be displaced. The bottom 254 of the first pump part 154 extends from the running surface 234 and forms a downward bend in a central region 504 , which extends on the other side of the bottom 254 in the form of a pipe socket 264 , onto which a riser pipe 274 is attached . In the area of the pipe socket 264 , an opening 294 is provided in the bottom 254 , which is closed by a ball 514 in the illustration in FIG. 8. The ball 514 is held in the lower stroke position of the second pump part 164 by a valve holder 524 arranged below the second pump part 164 , which will be explained in more detail below, in the closed position.

The second pump part 164 has a central part 314 , which can be stored in the manner of a piston back and forth along the running surface 234 . This middle section 314 is delimited at the bottom by a second valve 204 in the form of an attached valve plate 544 , which assumes a closed position when the second pump part 164 is displaced upward by the pretensioning of a spring 174 and in the opposite direction medium from a below the middle one Part 314 can flow through the pump chamber 184 arranged in the first pump part 154 . The inside of the middle part 314 is connected to a curved, radially projecting channel section 354 and forms together with this a discharge pipe 214 .

The valve holder 524 consists of a deformable plate 524 a, from which a plunger member protrudes centrally and normally on both sides of the plate 524 a, which has a support foot 524 b at its lower region for contacting the ball 514 and a rounded nose 524 on its upper side c, which penetrates into the valve plate 544 provided in the bottom 374 . The plate 524 a is broken several times for the passage of medium. The openings are sufficiently large so that the risk of clogging is avoided. In its initial position, the plate 524 a of the valve holder 524 is arranged essentially horizontally in the pump chamber 184 . The foot 524 b of the plunger is located above three stops 534 which are provided in the lower part of the cranked portion of the first pump part 154 and which form a diameter constriction which limits the path of the ball 514 .

The pump dispenser 104 is now actuated in the following manner: If the second pump part 164 is pressed against the pretension of the spring 174 , the pressure increase in the pump chamber 184 causes the ball 514 to press against the opening 284 forming a seat in the first pump part 154 while the second valve 204 opens and establishes a fluid connection between the pump chamber 184 and the discharge pipe 214 . Reaches the second pump part 164 its lower stroke position, the pressure exerted on the nose 524 c of the valve holder 524 deflects it out of its essentially horizontal position downwards, whereby the seat 524 is displaced up to the stop against the ball 514 . If the second pump part is locked in this position against the first pump part, the valve holder 524 effects a leak-proof transport position by the ball 514 being held permanently against its seat 304 . If one releases the pressure on the second pump part 164 , the spring 174 shifts the second pump part 164 from the first pump part 154 back into the starting position, the own restoring force of the valve holder 524 shifting it back into its essentially horizontal position. The negative pressure in the pump chamber 184 causes a suction that sucks the ball 514 against the intended 534 strokes and at the same time opens the opening 294 so that medium can flow through the opening 294 and along the webs 534 into the pump chamber 184 . Since the second valve 204 closes at the same time, it is excluded that medium flows from the inside of the discharge pipe back into the pump chamber 184 .

The pump dispenser 104 makes it possible to discharge large volumes of medium by using the entire interior of the middle part 314 , which works in the manner of a piston, as a supply for the medium to be discharged. The manufacture of such a hollow cylinder is easily possible with simple means. The second pump part 164 is formed in one piece with the cover member 334 and the channel section 354 of the discharge tube, so that it emits a substantially dome-shaped closed contour to the outside. In order to somewhat reduce the volume conveyed or that volume which is temporarily stored in the hollow cylinder 314 , it is advantageously possible to provide a porous filling element in the manner of a sponge in the hollow cylinder 314 , which correspondingly reduces the holding volume.

The two pump parts 154 , 164 are inexpensive in a simple manner and can be produced with little effort. By plugging the first and second pump parts 154 , 164 together , an easy-to-use pump dispenser 104 is created , which, moreover, can be assembled inexpensively. The pump dispenser 104 thus consists of seven parts, namely the first pump part 154 , the second pump part 164 , the spring 174 , the riser pipe 274 , the ball 514 , the valve plate 544 and the valve plate holder 524 . The parts can be preassembled before delivery to the customer, so that only a few parts need to be taken into account for the delivery when forming the pump dispenser 101 .

In Fig. 9, a further embodiment of a pump dispenser OF INVENTION to the invention 105 is shown.

The pump dispenser comprises a first pump part 155 made of plastic in injection molding technology and a second pump part 165 which can be displaced relative thereto, both of which are made of polypropylene. The first pump part 155 is a cap part, the outer collar of which can be plugged over the bottle head 125 and a projection 545 is formed in the edge region thereof, which extends the bottom 255 essentially radially outwards. On the inside, an annular notch 245 of the cylinder jacket surface rides on an annular projection 145 of the bottle head 125 . In the middle of the bottom 255 there is a pipe socket 265 pointing towards the inside of the bottle, onto which a riser pipe 275 is attached from below. A steel ball 515 closes an opening 295 in the pipe socket 265 , and above the steel ball 515 provided spaced holding means 535 prevent them from moving out of the area of the opening 295 further than a predetermined distance. Between the holding means 535 and the ball 515 there is sufficient space for the passage of medium.

The second pump part 165 , which is made of plastic using injection molding technology, has an outer part 325 which can be moved back and forth along the outer wall of the first pump part 155 by means of a sealing lip 725 to be described in more detail. A cylindrical spring 175 supported or hooked in the shoulder area of the bottle 115 biases the second pump part 165 relative to the first pump part 155 . The second pump part 165 essentially has the shape of a cover member 335 , from which the hollow part which is displaceable along the pump part 155 comes from the outer part 325 . A discharge tube 215 is formed in one piece with the cover member 335 , starting from a mouth region 345 , at the other end of which a second valve 205 is provided. The second valve 205 is designed as a slotted rubber or silicone membrane 485 , which is prestressed in the closed position and only opens when an overpressure arises in the pump chamber 185 delimited by the first pump part 155 and the second pump part 165 . On the second pump part 165 , web areas 425 are also provided in the region of the second valve 205 for engagement with the ball 515 in the lower stroke position of the second pump part 165 . With a somewhat eccentric arrangement of the second valve 205 in the second pump part 165 , a central mandrel could also be provided for this instead of the web regions 425 .

The sealing lip 725 , which is shown in more detail in FIG. 13, is circumferentially formed on the inside of the outer part 325 and has the shape of a circumferential projection in cross section, from which an inwardly and downwardly projecting leg 725 a projects. The upper shoulder 725 b of the sealing lip forms a stop and acts with the projection 545 upward stroke limitation. The inward area of the sealing lip 725 is the only permanent point of contact between the two pump parts 155 , 165 and must therefore also seal the pump chamber 185 . The pressure equalization in the bottle 115 again takes place via capillaries (not shown) in the region of the first pump part 155 .

It can be seen in FIG. 9 that the pump chamber 185 is arranged essentially above the bottle head 125 between the first pump part 155 and the second pump part 165 . This advantageously enables a large delivery volume.

The second pump part 165 has a locking means on the side facing away from the mouth 345 of the discharge tube 215 and in one piece with the cover member 335 as a locking hook 705 , which protrudes below the limit level of the cover member 335 and when the second pump part 165 is depressed into the area of the bottle 115 dips. When the pump dispenser 105 is locked in the closed position, the engagement hook is pivoted in a bayonet lock 715 and the second pump part 165 is thus held securely. The web areas 425 then press the steel ball 505 against its seat 285 and thus prevent any leakage of medium from the bottle 115 .

The second pump part 165 can be easily produced by injection molding. The circumferential sealing lip 725 is formed with the aid of a folding core which can be collapsed during removal from the mold in order to release the undercuts. The silicone membrane 485 is clamped onto the finished pump part 165 .

The assembly and pumping operation of the assembled pump dispenser are carried out in accordance with the previous exemplary embodiments, to which reference is hereby made, but the spring 175 is attached between the bottle 115 and the second pump part 165 .

The pump dispenser 105 according to the invention consists only of six parts which can be produced inexpensively, namely the first pump part 155 , the second pump part 165 , the membrane 485 , the ball 515 , the spring 175 and the riser pipe 275 .

In Fig. 10, a further embodiment of a pump dispenser OF INVENTION to the invention 106 is shown. The pump dispenser has essentially the same structure as the pump dispenser 105 from FIG. 9, and the same parts as in the pump dispenser 105 are denoted by reference numerals incremented by one.

The pump dispenser 106 differs from the pump dispenser 105 essentially due to the design of the first valve 196 and the second valve 206 .

The first valve 196 is comparable to the first valve 190 of the embodiment of FIGS. 1 and 2, so that ver can be referred to the associated versions for the manufacture and operation. The corresponding parts of the valve 196 are designated by six incremented reference characters with respect to the reference numerals of FIG. 1.

The second valve 206 is ausgebil det as a check valve, which was simultaneously manufactured with the second pump part 166 in the injection molding process and whose structure and operation is analogous to the first valve 196 . The corresponding parts of the valve 206 are designated by six incremented reference characters with respect to the reference numerals from FIG. 1.

The area above the second valve 206 in the cover member 336 has a cover 436 , which is folded along a film hinge 446 . This enables the manufacture of the movable valve member by means of a core inserted from the top with the counter-shape of the valve member.

The area of the cover member 336 facing away from the mouth region 346 of the discharge tube 216 is drawn a little lower than the plane of the mouth region 346 and at the same time is slightly bent inwards, as shown in FIG. 10 at 706 . The area 706 forms a clamping lug which, when the second pump part 166 is depressed, when this is rotated by approximately 90 °, comes into engagement with a corresponding recess or the outer surface of the bottle 116 and the two parts are clamped against one another.

For the manufacture and assembly of the parts and the Operation of the pump dispenser is based on that of the previous execution examples said reference.

The pump dispenser 106 according to the invention consists only of four parts that can be produced inexpensively, namely the first pump part 156 , the second pump part 166 , the spring 176 and the riser pipe 276 .

In Fig. 11, another embodiment of a pump dispenser OF INVENTION to the invention 107 is illustrated.

The pump dispenser 107 comprises a first pump part 157 and a second pump part 167 , each made of plastic, which can be moved up and down relative to one another and between which a pump chamber 187 is defined. The first pump part forms a fixed piston, while the second pump part 167 acts as a movable cylinder.

The first pump part 157 is cap-shaped and has the shape of an inverted U in cross section. It is clipped over the bottle head 127 of a bottle 117 and has on the inside on the area surrounding the bottle head a projection 247 which abuts an overlying projection 147 of the bottle 117 and locks the first pump part 157 with the bottle 117 . On the side of the first pump part 157 facing away from the projection 147, a circumferential snap element 657 in the manner of a ring is arranged circumferentially on an edge 677, which is formed in one piece with the first pump part 157 via film hinges 667 . The snap element 657 is injection molded with the first pump part 157 in one piece.

The first pump part 157 further comprises a first valve 197 which closes an opening which is provided in the region of a pipe socket 267 . A riser pipe 277 is inserted into the pipe socket 267 .

The first valve 197 includes a trained as a flap Ven tilglied 307 on which a displaceable along a film hinge 307 by abutting against a valve seat defining collar 287 in the closed position whereby the opening is sealed 297, and is biased in the closing direction onto the pipe socket 267 toward in which the opening 297 passes medium. A protruding nose 537 of the bottom 257 forms a stop for the flap 307 and ensures that it does not open more than a desired angle. When the pump dispenser 107 is under pressure, there is always a sufficiently large effective area facing the pump chamber 217 to press the flap 307 downward.

On the side of the bottom 257 of the first pump part 157 facing away from the pipe socket 267, a conical spring 177 made of plastic is injection molded near the edge 677 . The spring 177 biases the first pump part 157 against a second pump part 167 , which likewise has an essentially U-shaped cross section and overlaps the first pump part 157 . The ends of the legs 327 are formed as a circumferential sealing lip 727 , which also forms a stop in the upper stroke position against the lower ends of the snap element 657 clamped between the two pump parts 157 , 167 .

In Fig. 11, the starting position of a snap-in element on the right is indicated by dashed lines 657 after manufacture. The snap element is articulated approximately in the middle of its longitudinal extent to the edge of the first pump part 157 and takes an angle of approximately 45 ° to the bottom or to the main axis of the first pump part 157 . The snap element is slightly inclined outwards in its upper region so as to generate a slight preload against the inner wall of the second pump part 167 and to keep the second pump part 167 snapping firmly. In addition to the snap function, the snap element 657 also has a sealing function in that it circumferentially seals the pump chamber 187 with the second pump part 167 to the outside. The upper nose acts like an additional sealing lip. It is also possible to provide on the lower leg a radially protruding projection in addition to the nose provided above, which at the same time compensates for bends in the snap ring 657 and increases its preload against the second pump part 167 . Alternatively, the snap ring can also be thicker at the bottom than at the top. Because of the flexibility required by the snap ring 657 , a softer plastic is particularly suitable for production.

In the second pump part 167 , a second valve 207 is seen, which is designed as a folding valve 397 , which is biased in the closing direction and is raised when pressure builds up in the pump chamber 187 to release a passage for medium. The folding valve 397 is hinged to a film hinge and is limited by the wall of the discharge tube in its opening. The spring 177 passes through the pump chamber 187 . Beyond the second valve 207 , the discharge channel 217 is integrally formed integrally with the cover member 337 , which leads the medium conveyed out of the pump chamber 187 to the outside. A pin 427 on the second pump part 167 is intended to press against the valve flap 307 and to keep it in the closed position when the second pump part 167 is locked in its transport position. For this purpose, a bayonet catch 717 designed as a cam track is provided in the lower area of the first pump part, in the track of which cams 707 designed against the sealing lip can snap into place.

The first pump part 167 is produced in two steps. In a first step, the first pump part 167 is injection molded from HDPE, the flap 307 and the snap element assuming the position indicated by dashed lines in FIG. 11. The corresponding counter forms are formed in the cores used. In a second step, the spring 177 made of POM is molded onto the bottom 257 of the first pump part. POM is chosen to avoid shape change due to cold flow. The two-component injection molding process delivers an already advantageously highly integrated component. It is understood that the spring 177 can also be injected onto the second pump part 167 in the same way. The second pump part 167 is produced in a conventional manner with cores embedded in the openings.

Assembling and pumping the assembled pump spenders is carried out in the same way as in the previous execution examples to which reference is hereby made.

Another embodiment of a pump dispenser 108 according to the invention will now be explained with reference to FIG. 12.

The pump dispenser 108 comprises a first pump part 158 , which is snapped in an extension of the bottle head 128 inside the bottle 118 between projections 558 . The first pump part 158 is injection molded from polyethylene and is essentially designed as a flat disk 258 , from which a pipe socket 268 extends in the middle downward, into which a riser pipe 278 is inserted. A first valve 198 in the area of the pipe socket 268 controls the passage of medium from the inside of the bottle 118 into a pump chamber 188 located above the disk 258 .

The first valve 198 is a membrane 478 molded onto the disk 258 in the region of the pipe socket, which is slotted for the passage of medium. The diaphragm portions delimiting the slot are biased such that they form a check valve which opens or closes the chamber in response to the pressure drop or build-up between the interior of the bottle and the pump.

A circular, web-like spring support 608 on the side of the disk 258 facing away from the pipe socket 268 holds a conical spring made of POM at a distance from the first valve 198 . The other end of the spring 178 is supported against a sleeve 618 , which forms a first component made of polyethylene of a second pump part 168 . The cuff 618 consists of a lower disc 618 a, which is provided all round with a sealing crown 618 b in the manner of a double sealing lip, which is designed to be displaced back and forth along the inner wall of the bottle head 128 in the manner of a piston. The spring 178 biases the cuff 618 to its upper stroke position. On the side remote from the spring side of the disc 618 a goes on the ticket 618 be a part of a hollow tube 618 from c, which is snapped at its other end with a dispensing head 628th In the area of the tube part 618 c, a slotted membrane 488 is injection molded into the disc 618 a as a second valve 208 , which functions like the first valve 198 . The lumen of the tubular part 618 c thus forms a first channel section 358 of a support tube 218 .

The dispenser head 628 forms the second component of the second pump part 168 . The head 628 has an upwardly bulging calotte-like shape which is shaped as a cover member 338 . The second channel section 368 of the discharge tube 218 is formed in one piece with the cover member 338 and extends below the cover member. The two components of the second pump part 168 are put together such that a tight transition for medium between the two channel sections 358 , 368 is formed. The dispenser head 628 also has a cylindrical outer part 328 , which extends from the cover member 338 and is concentric with the tube part 618 c and encompasses the bottle head and is provided at the end with claws 468 which hold the second pump part 168 and the bottle 118 in engagement and at the same time form an upward stroke limitation. It is advantageously possible, in addition, for. B. in the manner of the above embodiments to provide a transport lock.

The two components of the second pump part 168 can be simply plugged together. The pump dispenser 108 can then be assembled simply by first snapping the first pump part 158 with the attached riser pipe 278 into the bottle 118 , placing the spring 178 on the first pump part 158 and then pressing the spring 178 over the second pump part 168 Bottle neck 128 is clipped.

The pump dispenser according to the invention consists only of six parts which can be produced inexpensively, namely the first pump part 158 , the sleeve 618 , the dispenser head 628 , the dispenser outlet pipe 358 , the spring 178 and the riser pipe 278 .

Referring to FIGS. 15 to 17, a tenth exporting is described approximately, for example a pump dispenser 109th The same or the functionally identical units as in the previous embodiment examples are again designated by one incremented reference numerals.

The pump dispenser 109 arranged on the bottle head 129 on the bottle 119 has a first pump part 159 , which can be seen in plan view in FIG. 17, and a second pump part 169 , which can be displaced up and down relative to this, and which in FIG. 16 is a plan view is shown. The first valve 199 of the first pump part 159 consists of a ball 519 which , due to gravity, presses against its seat 289 and is prevented from entering the pump interior 189 by webs 539 arranged above its seat.

The valve 209 of the second pump part 169 is also a ball valve, comprising a ball 809 , which due to gravity rests on the seat 409 and is prevented from leaving the second pump part 169 by projections 819 . Immediately on the side of the projections 819 is the mouth area 249 in the cover member 339 , with a discharge tube being largely eliminated. A middle part 319 and an outer part 329 go off in the cover member 339 .

The first pump part 159 has a circumference of a plurality of collar sections 229 which are clipped over the end face 139 of the bottle head 129 , as can be seen more precisely in FIG. 17. The second pump part 169 is plugged onto the first pump part 159 in such a way that the middle part 319 slides along the inside of the cylinder wall 239 of the first pump part 159 and the outer part 329 , which is provided at the end with claws 469 , engages around the bottle head 129 from the outside .

The claw 469 strikes in the upper stroke position of the second pump part 169 against a projection of the bottle head 129 or accordingly designed parts, in particular the collar parts 229 , of the first pump part 159 . The middle and the outer part 319 , 329 and part of the cover member 339 and the first pump part 159 delimit a chamber 419 into which a spring can be arranged. In the present embodiment, however, the pump dispenser 109 does not require a spring. The middle section 319 seals the pump chamber 189 against the ring chamber 419 . It should be noted that a groove-like depression in the bottom 259 of the first pump part 159 enables the middle section 319 to be stored in the lower stroke position with a reduced pump volume. In this lower stroke position, the web area 429 , which is provided on the underside of the first valve 209 , clamps the first ball 519 against its seat 289 .

In order to lock the first pump part with the second pump part in the lower stroke position, the second pump part, as can be seen more clearly in FIG. 16, has circumferentially arranged catch pockets 829 which are provided in the collar parts 229 in accordance with the circumferential distances and dimensions. A catch pocket 829 corresponds approximately to an opening angle β of 30 °, as does the angle β between two adjacent catch pockets 829 , which are shown in dashed lines in FIG. 16. The catch pockets 829 are extended downwards by vertical webs 04512 00070 552 001000280000000200012000285910440100040 0002019713720 00004 04393rt, which run along the side of the collar sections 229 . The second pump section 169 is in the position of minimum pump chamber volume, there is a catching pocket 829 between each two adjacent collar sections 229, so that by a rotation of approx β equal to 30 ° of the second pump member 169 relative to the first pump section 159, the catch pockets 829 can be pushed over the collar portions 229 and lock them together. The second pump part 169 is then held firmly against the first pump part 159 by a rotation by approximately 30 °, and the web part 429 presses the ball 519 against its seat 289 . Preferably, the catch pockets 829 are "open" for rotation in one direction only and also have a lock to be overcome by pressure. This advantageously ensures that, on the one hand, the second pump part 169 is only intentionally locked in place with the first pump part 159 and, on the other hand, inadvertent releasing of the catch pockets 829 from the collar parts 229 is prevented when the bottle 119 with pump dispenser 109 is transported.

Since the pump dispenser 109 has no spring, which is designed for lifting the second pump part 169 , the second pump part must be pulled up for pumping operation. A pull handle can advantageously be provided for this. It should also be pointed out that on the underside of the first valve 199, a riser pipe 279 was produced in one piece with the first pump part 159 by injection molding. A plug connection between the pipe socket and the riser pipe is therefore omitted, so that the assembly effort is reduced.

The production of the pump parts and the assembly happen hen in an analogous manner to the previously described Ausführungsbei play. The result is a pump dispenser 109 , which only consists of four parts that can be produced inexpensively, namely the first pump part 159 with an integrally molded riser pipe 179 , the second pump part 169 and the two balls 519 , 809 . If the valves were injection-molded in one piece with the pump parts, as is the case, for example, in the embodiment according to FIG. 1 and can easily be transferred to the present exemplary embodiment, the pump dispenser 109 would only consist of two parts.

The invention is based on ten exemplary embodiments play has been explained in more detail. The specialist easily recognizes that under the condition of the appropriate shape the different those configurations of the first pump part or the second pump some of these can be combined to form further pump dispensers according to the invention are.

There are a number of valve designs in the first Pump part or in the second pump part have been disclosed, but the ver always on the other part in an analogous manner can become real.

So it is to reduce the number of parts for each of the be written embodiments possible, the riser pipe in one piece  to manufacture the first pump part and thereby one part less to Get assemble. This can be done in a common injection molding step, but also take place according to a two-component process.

So much for the description of the individual exemplary embodiments Materials have been specified, the skilled worker will readily recognize that these materials are substituted by corresponding other materials let them do that for the intended purpose or the selected one Manufacturing processes have the required properties.

For the sake of clarity, each of the above is standing embodiments have been briefly described, and the On possible alternatives were not counted. The professional he knows, however, without further ado that the disclosure of the invention about the Disclosure of each example also the combinations of Parts should be disclosed as part of the invention.

Claims (33)

1. Pump dispenser for the metered discharge of liquid, viscous or pasty substances from a container, comprising a first pump part which can be fixed to the container and a second pump part which can be displaced relative to the first, the one with the container via a first valve and with a discharge opening via limit the pump chamber connected to the second valve,
characterized by
that the second pump part ( 160-169 ) can be locked in a position of minimum volume of the pump chamber ( 180-189 ), and
that means ( 420-429 ) are provided which keep the first valve ( 190-199 ) closed in the locked position of the second pump part ( 160-169 ). 2. Pump dispenser according to claim 1, characterized in that the second pump part ( 160-166 , 168 ) can be locked in a form-fitting manner on the container ( 110-116 , 118 ). 3. A pump dispenser according to claim 1, characterized in that the second pump section (160, 167, 169) form-locking to the first pump section (150, 157, 169) can be locked. 4. Pump dispenser according to claim 2 or 3, characterized in that the locking means can be released by rotating the second pump part ( 160-169 ) relative to the container ( 110-119 ). 5. Pump dispenser according to claim 4, characterized in that the Locking includes a bayonet lock assembly. 6. Pump dispenser according to one of claims 1 to 5, characterized in that the means for keeping the first valve ( 190-197 , 199 ) on the second pump part ( 160-167 , 169 ) are arranged. 7. Pump dispenser according to claim 6, characterized in that the first valve ( 190-199 ) has at its opening in the interior of the pump chamber ( 180-189 ) displaceable valve member, and that the second pump part ( 160-169 ) for the Pressing the valve member ( 300-309 ) of the first valve ( 150-159 ) on its valve seat ( 280-289 ) is formed. 8. Pump dispenser according to one of claims 1 to 7, characterized in that the pump parts ( 150-159 ; 160-169 ) are injection molded parts made of plastic. 9. Pump dispenser according to claim 8, characterized in that the Ven tile ( 190 , 192 , 193 , 196 , 197 ; 200 , 206 , 207 ) each have a valve member ( 300 , 302 , 303 , 306 , 307 ; 390 , 396 , 397 ) comprise, which is sprayed together with the relevant pump part ( 150 , 152 , 153 , 156 , 157 ; 160 , 166 , 167 ). 10. Pump dispenser according to claim 9, characterized in that the valve member ( 307 ; 397 ) of the first and / or second valve ( 197 ; 207 ) is designed as on the pump part ( 157 ; 167 ) via a film hinge is steered flap. 11. Pump dispenser according to one of claims 1 to 8, characterized in that the first and / or second valve ( 191 ; 201 , 203 , 208 ) is designed as a slotted membrane ( 471 ; 481 , 483 , 488 ). 12. Pump dispenser according to claim 11, characterized in that the membrane ( 471 ; 481 , 483 , 488 ) on the relevant pump part ( 151 ; 161 , 163 , 168 ) is clamped. 13. Pump dispenser according to one of claims 1 to 12, characterized in that a discharge channel ( 210-218 ) is integrally formed with the second pump part ( 160-168 ). 14. Pump dispenser according to claim 13, characterized in that the discharge channel ( 210-218 ) has a plurality of channel sections ( 350-354 , 358 ; 360-364 , 368 ). 15. Pump dispenser according to one of claims 1 to 14, characterized in that a spring ( 170-178 ) is provided for the return movement of the second pump part ( 160-168 ) relative to the first pump part ( 150-158 ). 16. Pump dispenser according to claim 15, characterized in that the return spring ( 170-174 ) in one of the two pump parts ( 150-154 ; 160-164 ) limited chamber ( 410-414 ) is provided, which is outside the flow path of the substances to be discharged lies. 17. A pump dispenser according to claim 15, characterized in that the spring ( 177 ) is a plastic spring that is molded onto the pump chamber ( 187 ) and is injected onto one of the pump parts ( 157 ). 18. Pump dispenser according to one of claims 1 to 17, characterized in that a cover member ( 330-336 , 338 ) is provided for covering the container shoulder, which is integrally formed with the second pump part ( 160-166 , 168 ). 19. Pump dispenser according to claim 18, characterized in that the cover member ( 330-336 , 338 ) has a spherical shape. 20. Pump dispenser according to claim 18 or 19, characterized in that the cover member ( 330-336 , 338 ) has a contour flush with the container shoulder . 21. Pump dispenser according to one of claims 1 to 20, characterized in that the first pump part ( 150-154 , 159 ) is designed as a cylinder of a piston-cylinder unit, which can be fixed on the container ( 110-114 , 119 ) , while the second pump part ( 160-164 , 169 ) is designed as a piston which is displaceable in the cylinder. 22. Pump dispenser according to one of claims 1 to 21, characterized in that the first pump part ( 155-157 ) is designed as a piston of a piston-cylinder unit, which can be fixed to the container ( 115-117 ), while the second Pump part ( 165-167 ) is designed as a cylinder which is displaceable on the piston. 23. Pump dispenser according to one of claims 1 to 21, characterized in that the first pump part ( 158 ) is fixed in the container ( 118 ) and with a cylinder wall of the container ( 118 ) a cylinder for a displaceable piston of the second pump part ( 168 ) forms. 24. Pump dispenser according to one of claims 21 to 23, characterized in that sealing projections for sealing the pump chamber ( 180-189 ) against the ambient atmosphere are provided on the displaceable part. 25. Pump dispenser according to one of claims 1 to 24, characterized in that the means for keeping the first valve ( 190-197 , 199 ) downward projecting parts ( 420 , 371 a, 422 , 524 b, 425 , 426 , 427 , 429 ) of the second pump part ( 160-167 , 169 ). 26. Pump dispenser according to one of claims 1 to 25, characterized in that the means ( 460-464 , 705-708 , 829 ) for locking the second pump part ( 160-169 ) in a position of minimum volume of the pump chamber ( 180-189 ) interact with locking means ( 450-454 , 715-718 , 229 ) on the container ( 110-118 ) or the first pump part ( 150 , 159 ). 27. Pump dispenser according to claim 26, characterized in that the means for locking catch pockets ( 829 ) which can be pivoted by rotation over parts ( 229 ) of the first pump part ( 159 ). 28. Pump dispenser according to one of claims 1 to 27, characterized in that on the side of the first pump part ( 150-158 ) facing away from the second pump part ( 160-168 ), a pipe socket ( 260-268 ) for pinning a riser pipe ( 270- 278 ) is formed. 29. Pump dispenser according to one of claims 1 to 28, characterized in that a sponge-like filling element is provided for volume reduction in the region of the discharge tube ( 214 ). 30. Pump dispenser according to one of claims 1 to 29, characterized in that snap-on elements ( 657 ) molded onto at least one pump part latch the two pump parts ( 157 ; 167 ) against one another. 31. A method for producing a pump part with a dispenser valve according to one of claims 1 to 30,
characterized by the steps
Forming the pump part ( 150 , 152 , 153 , 156 , 160 , 166 ) from plastic by means of injection molding, a valve member ( 300 , 302 , 303 , 306 , 390 , 396 ) of the valve ( 190 , 192 , 193 , 196 , 400 , 406 ) is formed integrally with the pump part ( 150 , 152 , 153 , 156 , 160 , 166 ); and
Tear off the valve member ( 300 , 302 , 303 , 306 , 390 , 396 ) from the pump part ( 150 , 152 , 153 , 156 , 160 , 166 ) during demolding, the pump part ( 150 , 152 , 153 , 156 , 160 , 166 ) has a path limitation for the valve member ( 300 , 302 , 303 , 306 , 390 , 396 ). 32. The method according to claim 31, characterized in that for forming the pump part ( 150 , 152 , 153 , 156 , 160 , 166 ) cores are arranged in a shape which is used for demolding the pump part ( 150 , 152 , 153 , 156 , 160 , 166 ) can be removed from the mold. 33. The method according to claim 32, characterized in that one of the cores for producing the valve member ( 300 , 302 , 303 , 306 , 390 , 396 ) has at least one undercut portion.