DE1298883B - Sprayer pump - Google Patents

Description

The invention relates to a sprayer pump, which consists of a in a container to be used pump cylinder with an inlet opening for the liquid from the Container, consisting of one in the cylinder between a rest position and an indented one Position can be moved back and forth (preferably pressed against spring action and returned to the rest position under the action of a spring) piston, from one of the Actuating pin protruding from the cylinder, from a (preferably valve) Liquid outlet and from a ventilation device for the interior of the container there is a connection opening in the cylinder wall between the container interior and the cylinder interior behind the piston and one in the rest position of the pump by a shoulder on the actuating pin (for example by resting against the rear Piston surface) closed, ring-shaped, surrounding the actuating pin of the pump Slot as a connection opening between the cylinder interior and the outside air having.

There are known spray pumps which, in addition to the actual pump parts, d. H. the pump cylinder, which can be pressed in against the action of the spring and which is made by the spring returned to the rest position piston and the valve provided with liquid inlets and outlets also have a ventilation device for the interior of the container, which prevents the inside of the container when pumping out the liquid to be sprayed a negative pressure is created.

This previously known ventilation device consists of an opening in the cylinder wall, which is the connection between the interior of the container and the interior of the cylinder represents the air intake connection between the cylinder interior and the outside air by an existing one between the ventilation pin of the pump and the cylinder end wall Ring opening is formed, which in the rest position of the pump by one on the actuating pin intended shoulder, for example the rear face of the piston itself, is closed.

This connection between the inside of the container and the inside of the cylinder becomes by keeping the connection opening at a considerable distance, for example lies behind the sealing area of the piston in the cylinder.

This permanent connection provided in the known sprayer pumps but between the container interior and the cylinder interior has the disadvantage that, for example in the case of horizontal sprayers, considerable quantities of the contents of the container through these openings can enter the cylinder interior behind the piston. It is, therefore, like the experience has shown, basically necessary when using the known spray pumps, keep the sprayer in an upright position so that the contents of the container are not removed gets into the rear cylinder space and there damage, for example due to sticking and rendering inoperable the guides and seals of the pump.

In relation to these known devices, the object of the invention is to be found based on, in a simple but effective manner, a seal between the interior of the container and to create the cylinder space behind the piston, which performs the function of the Ventilation valve not obstructed, but still effective any penetration of Prevents the contents of the container in the cylinder space behind the piston. This task will according to the invention achieved in that the ventilation device for the container interior as positive acting and controlled by the actuation of the piston of the pump Valve is formed and for this purpose between the container interior and the cylinder interior arranged connection opening is designed as a bore in the cylinder wall, which is completely covered and closed by the piston when the pump is in the idle position is.

The positive-acting controlled ventilation valve created according to the invention prevents the contents of the container from penetrating the rear part of the pump cylinder and thus represents a considerable advantage over all known spray pumps With a sprayer pump according to the invention, the sprayer can be in any desired Be packed, transported and displayed without the risk of that any contents of the container get into the rear parts. The pump is immediately in working order and does not require any additional safety devices.

In a particularly advantageous embodiment of the invention, the as a ventilation valve with the cylinder wall and its bore cooperating piston part one that glides on the inner surface of the cylinder and is directly in the idle position of the pump over the bore of the cylinder wall lying annular surface, which has a larger axial Length than its radius.

Further exemplary embodiments of the invention are shown in the drawings and are described in more detail below. It shows F i g. 1 a perspective Illustration of the spray pump mounted on a container, FIG. 2 an enlarged Axial section through the pump with the piston raised, FIG. 3 a section after the line 3-3 of FIG. 2, fig. 4 shows a representation similar to FIG. 2, but with lowered piston, F i g. 5 shows a representation similar to FIG. 2, but with one Amendment, fig. 6 shows a representation similar to FIG. 2 and 5, but with a different one Amendment, fig. Figure 7 is a section showing a modified valve and piston assembly shows F i g. 8 shows an axial section of another embodiment with modifications on valve and piston and F i g. 9 is an axial section of a broader embodiment with changes to the valve and piston structure.

An embodiment according to the invention shows (Fig. 1) that the spray pump in its individual parts 12; 13, 16, 17, 37, 38, 11 as one unit is attached to the container 10. A cap 11 is arranged on the container 10 and above this cap 11 a nozzle head 12, which is the upper end of a piston unit forms. The cap parts 14 represent an interrupted thread with threads cooperates on the container 10 (FIG. 2). In the cap 11 is a sealing ring 15 attached to the cap 11 opposite the mouth edge of the container 10 to seal.

A housing 16 with a side extends from the nozzle head 12 Opening 17. In the housing 16 at a distance from the opening 17 there is a pin 18 with the spiral thread 19, where the air flows through between the turns of the spiral thread and yourself in a mixing chamber 20 with that through the bore of the pin 18 can intensively mix the emerging liquid. If the pin 18 has no hole both air and liquid flow through the scroll wraps. As well as the housing 16 and the pin 18 extend in a vertical bore in the head 12.

The upper part of the piston unit has a metal tube 13, which is preferably folded over to the outside at its lower end 13 '. A ring socket 21 is provided between the tube 13 and an outer tube 22, the the latter represents a cylinder. This unit contains a flexible cuff or a piston 23 engaged with the cylinder wall. The top end 24 of the cuff 23 is continued as a vertical tube and is preferably made made of flexible material.

The cylinder 22 is narrowed at its lower end 25 and carries a flexible immersion tube 27. Between the main cylinder 22 and the lower end 25 is a conical part 29. This conical part 29 represents a valve seat for a spherical valve 30 , which by its own Gravity on the conical part 29 is held.

A spring 31 is provided in the cylinder 22 and is held between a shoulder 23 ′ formed in the sleeve 23 and a shoulder 22 ′ formed in the lower part of the cylinder 22.

In the upper part of the piston unit, a second valve 33 is provided that lies in a conical seat 32 at the upper end of the flexible sleeve or piston 24. The valve 33 is held on its seat by a spring 34. To lift the valve 33 when the head 12 is pressed down against the action of the spring 31, a pin 35 is provided in the flexible sleeve or piston 24, which is free from the valve ball 33 when the head 12 is in the in Fig. 2 is in the upper position shown. The lower end of the pin 35 rests on the valve ball 30 and there is sufficient clearance between the pin 35 and the bore of the flexible sleeve or piston.

When the head 12 is pushed down, the top end lays down of the pin 35 against the valve 33, while the lower end of the pin 35 on the Valve 30 remains so that valve 33 is lifted from its seat 32, as F i g. 4 shows.

An air opening 36 is provided in the wall of the cylinder 22. When the head 12 is in the up position (Fig. 2), the opening is located 36 free of the metal tube 13.

When the head 12 of the unit, as shown in FIG. 4 shows, is pressed down, the outwardly folded part 13 'of the tube 13 runs to below the opening 36 and air can enter the container 10 through the opening 36, since it is due to the loose fit of the tube 13 in the ring socket 21 can reach the opening 36 from the outside. The upward movement of the flexible sleeve or of the piston 24 by the spring 31 is limited by the lower edge 13 ′ of the tube 13, which lies against the lower edge of the ring socket 21.

The piston unit forms one with its sleeve and the edge 13 ' tight sliding fit with respect to the ring bushing 21, so that under normal operating conditions the escape of liquids through this is prevented.

When the head 12 is pressed in against the action of the spring 31, the unit is displaced into its pressed-in position (FIG. 4), in which the pin 35 lifts the valve 33 and the spring 34 is compressed. When the button is released, the head 12 is raised under the joint action of the springs 31 and 34 , and the flexible sleeve or piston 23 exerts a suction effect in order to draw the liquid through the immersion tube 27 into the cylinder 22. This prevents the liquid from flowing back through the valve. A second depression of the head 12 causes the piston 23 to compress the air in the cylinder 22 and this pushes the liquid in the cylinder 22 upwards into the bore of the tubular extension 24 of the cuff and from there through the open valve 33. The liquid does not have to enter the tubular extension 24 lift the valve to flow to the nozzle can.

The liquid and air passing together through the bore of the piston move to the nozzle through the spiral passage formed by the rib 19 and / or through any bore which may be axially made in the pin 18. A finely divided mixture of liquid and air is sprayed from the chamber 20 through the opening 17.

The feature that the folded edge 13 'is held firmly and practically rigid or not flexible, while the sleeve or its extension of the piston 23 is flexible, is of particular importance in order to keep the piston 23 axially aligned and to deform laterally which could render the pump unusable.

In order to be able to hold the piston unit in the depressed state, can the nozzle can also be equipped with a pin 37 with a tab on the upper part of the piston unit 13 can be attached.

It is necessary for air to enter the container 10 to replace the dispensed liquid. This is referred to as venting in the following. It is also important to prevent leakage when turning the container upside down. However, it is often inevitable in the creation of a vent that the seal becomes ineffective in allowing liquid to pass from the container when the container is inverted.

The invention overcomes this difficulty and provides a satisfactory one Ventilation with full security against leakage of liquid.

The seal used here between the container and the outside atmosphere however, it is ineffective in the position shown in FIG. 4 is shown so that in the Creation of suction in the container of air between the ring sleeve 21 and the tube 13 and can be replaced by the ventilation hole 23 in the interior of the container. if the container in the in F i g. 2 is turned over to form the folded over Edge 13 'and the cuff 23 provide a secure seal.

In FIG. 5 the nozzle head is continued downward as a tube 39 which surrounds a second tube 40 which is part of the piston unit and continues downward as an annular collar 41 of larger diameter. This collar 41 slides in the cylinder 42 which has a valve 43 corresponding to parts 29 and 30 of FIG. 2 and 4.

In Fig. 5 are parts 23 and 24 of FIG. 2 and 4 not necessary for the unit. Instead, the collar 41 represents the piston, which can open and close the side ventilation opening 44 at the same time. At the upper end of the tube 40, a valve element 45 is provided which is attached to the upper end of the pin 46.

The parts work in a similar way to the structure described above. Here, too, the liquid in the cylinder 42 does not have to overcome the pressure with which the valve 45 is held on its seat when the nozzle head is pressed in. More often than not, the upper valve opens in the course of the pushing-in movement to provide a free flow passage for the liquid and the air to the nozzle. In the raised position of the nozzle, as shown in FIG. 5, the valve 45 seals against the top edge of the tube 40 , thus holding any liquid above the valve into the passage which extends to the nozzle opening. In its upper position, the piston 41 covers and closes the ventilation opening 44, and in its lower position it releases the ventilation opening 44 to the outside.

An optional form of valve construction is shown in FIG. 6 shown. there the cylinder 47 which carries the valve arrangement 48 is indicated. The spring 49 engages in the piston 50 corresponding to the unit 23, 24 of FIG. 4 or the unit 41 in FIG. 5. A drilled extension 51 constitutes an integral part of the Piston. The pin 52 has suitable clearance in the extension 51. The upper The end of the extension 51 has a valve seat 53, while the pin 52 is a valve 54 carries. If the other parts described above with the valve structure according to F i g. 6 are combined, particular advantages can be achieved.

In FIG. 7 shows another form of the upper valve. It consists of a piston, which is formed from a metal collar 55, and one upper tubular extension 56 terminating with a transverse wall. The pin 58 corresponding to the pin 52 (FIG. 6) rests with its lower end on the lower one valve (not shown) and its upper end carries a valve 59 with a lower one conical surface 60. The top wall 57 has an opening that is just wide enough to to slidably receive the valve 59. The edges surrounding the top opening are rounded. When the valve 59 fills the opening, the reflux of liquid ceases and air sufficiently effectively prevented. When the tapered surface 60 is in the Opening of the wall 57 is located, an unimpeded flow of liquid and Air. The operation of this valve is in the; rest the same as described above.

In Fig. 8 there is shown a further embodiment of the invention and those parts that are the same as in the embodiment of FIG. 2, have the same reference numerals, but with the; Appendix "a". The device according to FIG. 8 has a pin 61 in part 24 a, which corresponds to pin 45 of FIG. 5 is similar. The operation of the pen 61 in FIG. 8 is, as described above, so that when the head 12 a is pressed in, the parts are caused to move downward against the action of the spring 31 a and the lower end of the pin 61 sits on the ball 30 a. As a result, the valve 62 lifts and allows the liquid to flow upward from the chamber 22 a. In Fig. 8, a sealing element 63 made of rubber is provided, as it is not shown in the previous embodiments, and which has a cylindrical part 64 and an outwardly directed flange 65 opposite the upper surface of the container 10. The sealing element 63 also has a lower, inwardly directed shoulder 66, and a conically tapered end 68 which engages on the outer wall part 67 of the cylinder 22 a. The end 68 is exposed to the contents of the container 10 and constitutes a kind of membrane. Between the part 64 of the sealing element 63 and the cylinder 22a there is a chamber 69. This structure is a very effective seal that prevents any leakage of liquid prevents the container 10 and at the same time allows a satisfactory ventilation of the container, namely that the liquid dispensed from the container is replaced by air. When liquid is withdrawn from the container 10 into the cylinder 22 a, air enters the underpressure container by entering the chamber 69 between the ring sleeve 21 a and the tube 13 a through the ventilation hole 36 a, and from there into the container through the membrane 68, which expands under the internal pressure in the chamber 69. The escape of liquid is prevented by the pressure exerted on the membrane 68 by the liquid when the container is turned over.

F i g. 9 shows a further embodiment of the invention, which is shown in FIG the improvement according to FIG. 2 together with the sealing arrangement according to FIG. 8 contains.

In Fig. 9 wear all the parts identical to those of the embodiment according to FIG. 2 are the same, the same reference number, but with the addition "b". The sealing element of FIG. 9 is the same as the sealing element 64, 65, 66, 68 according to FIG. B.

The invention thus achieves the various advantages. Numerous changes in the structure and arrangement of the parts can also be made can be made without deviating from the inventive concept. All of the above Description in the drawing and features laid down in the claims can be essential on their own or in any conceivable combination Be of importance to the invention.

In the claims for individual parts of the sprayer after Invention more general terms are used to denote their more general meaning in To highlight the scope of the invention.

The following are referred to more generally: the immersion tube 27 as the inlet; the cylinder 22, the folded edge 13 'and the membrane 23 as axially spaced lying piston parts; the tube 13 as an actuating pin or tubular element; the folded edge 13 'and the cylinder 22 with the opening 36 as positive acting Ventilation valve that is opened and closed by the piston or the piston unit will; the extension 24 as a resilient tubular part.

Claims (6)

Claims: 1. Sprayer pump, consisting of one in a container to be used pump cylinder with an inlet opening for the liquid from the Container, consisting of one in the cylinder between a rest position and an indented one Position can be moved back and forth (preferably pressed against spring action and returned to the rest position under the action of a spring) piston, from one of the Cylinder protruding Actuating pin, from a (preferably with Valve provided) liquid outlet and from a ventilation device for the Container interior, which has a connection opening in the cylinder wall between the Container interior and the cylinder interior behind the piston and one in the rest position the pump by a shoulder on the actuating pin (for example by resting against the rear piston surface) closed, annular, the actuating pin the slot surrounding the pump as a connection opening between the cylinder interior and the outside air, characterized in that the ventilation device for the interior of the container as a positive effect and by actuating the piston the pump controlled valve is formed and for this purpose between the container interior and the connecting opening arranged in the cylinder interior as a bore (36, 44) in the cylinder wall (22, 42) is formed, which in the rest position of the pump from the piston (23, 41, 50, 55) is completely covered and sealed. 2. Pump according to claim 1, characterized in that the ventilation valve with the cylinder wall (42, 47) and its bore (44) cooperating piston part (41, 50, 55) one on the Inner cylinder surface sliding, in the idle position of the pump directly above the bore (44) of the cylinder wall (42, 47) lying annular surface, which has a larger axial Length than its radius. 3. Pump according to claim 2, characterized in that that the piston part sliding with the annular surface on the inner surface of the cylinder (42) (41, 55) is essentially rigid. 4. Pump according to claim 1 or 2, characterized in that the piston part (23, 50) cooperating as a ventilation valve with the cylinder wall (22, 47) and its bore (36, 44) is resilient and cup-shaped under the effect of the internal pressure in the cylinder (22 , 47) is designed to be expandable against the cylinder wall. 5. Pump after one of claims 1 to 4, characterized in that a bearing bush (21) as a guide of the piston actuating pin (13) is provided in the cylinder (22), the sufficient having axial length to stabilize the actuating pin (13). 6. Sprayer pump according to claim 5, characterized in that as a ventilation valve with the cylinder wall (22) and its bore (36) cooperating piston part (23,13) with an in the rest position of the pump against the inner end of the bearing bush (21) laying stop (13 ') is formed.