Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1028—Pumps having a pumping chamber with a deformable wall
  • B05B11/1035—Pumps having a pumping chamber with a deformable wall the pumping chamber being a bellow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1066—Pump inlet valves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1066—Pump inlet valves
  • B05B11/1067—Pump inlet valves actuated by pressure
  • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1043—Sealing or attachment arrangements between pump and container
  • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
  • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container

Definitions

• the invention relates to a spray pump for intermittent spraying of liquid substances from bottles or cans like containers with a bellows made of elastic plastic, which is arranged connecting between two housing parts made of dimensionally stable plastic, which is telescopically movable in the axial direction between two stroke limits and by the axial restoring forces of the bellows are resettable, pump valves being arranged at the two ends of the bellows, each of which has radially elastic, sleeve-like annular wall sections arranged in one piece on the bellows, each of which seals on the outer surface of a peg-shaped, ring-shaped or cup-shaped second valve partly concern.
• the open end of the bellows is provided with a mn cuff-like, radially expandable extension, which sealingly encloses an inwardly projecting tube extension of the housing part and at the same time acts as a movable closing element of the outlet valve.
• a closed end wall is provided at the opposite end of the bellows, against which a swivel lever provided with a handle part presses.
• the suction-side valve is arranged in a neck of the liquid container specially designed for this purpose.
• the two housing parts which are axially displaceable relative to one another are each provided with a transverse wall running at right angles to the axis of the bellows, these transverse walls on the mutually facing sides each having ring ribs for sealingly receiving one bellows end each exhibit.
• bores with valve seat surfaces and the associated closing elements of the pump valves are arranged in the two transverse walls.
• the movable closing elements of these pump valves are each designed as separate individual parts and the closing element of the suction-side pump valve is loosely guided by means of ribs arranged in a star shape in a tubular extension of the transverse wall of the container and secured against falling out by claw-like fingers protruding into the interior of the bellows.
• the closing element of the output-side pump valve has integrally molded spring elements which have a small axial closing element Press pressure on the valve seat and hold it in the closed position.
• the patent application P 38 28 811.7 also specifies options by which the uncontrolled, low-pressure flow of liquid from the spray nozzle at the end of a dispensing stroke can be prevented, in the form of a valve opener that opens the suction valve at the end of the dispensing stroke that the remaining excess pressure inside the bellows can escape through the suction valve into the liquid container and close the pump valve on the output side.
• a possibility of preventing the uncontrolled escape of liquid from the spray nozzle under a pressure that cannot cause spraying at the start of a dispensing stroke is also not specified there.
• the invention has for its object to provide a spray pump of the generic type, in which the uncontrolled escape of liquid from the spray nozzle under reduced, for a spray effect too low pressure at the beginning and end of a delivery stroke is prevented with the simplest possible means, taking into account is that such spray pumps are mass-produced items that are manufactured millions of times and that should therefore consist of as few, easy-to-assemble individual parts as possible.
• FIG. 1 shows in section a spray pump with a pressure point locking device
• FIG. 2 shows a section II-II from FIG. 1
• Fig. 3 shows a spray pump like Fig. 1 with another Pressure point locking device in the normal rest position of the two housing parts
• Fig. 4 shows the spray pump of Fig. 3 at the end of a delivery stroke
• Fig. 5 and 6 in an enlarged view the suction side
• Valve pin provided displacement body;
• Fig. 8 shows a spray pump in section with another
• Housing parts 9 shows the spray pump of FIG. 8 at the end of a delivery stroke; 10 the displacement body as a single part in section; 11 is the top end view of the displacement body of FIG.
• Fig. 13 shows another spray pump with a hydraulic
• FIG. 18 Components generating pressure point and FIG. 18 the suction-side valve parts of the spray pump of FIGS. 13 and 14 in an enlarged sectional view.
• the parts that occur jointly in each of the exemplary embodiments are identified by the same reference numbers, even if these parts are designed differently in detail.
• each of the spray pumps shown in full each consist of a total of four individual parts, namely a first housing part 1 and a second housing part. 2, from a bellows 3 and a substantially cylindrical displacement body 4. While the two housing parts 1 and 2 and the displacement body 4 are each made of solid, dimensionally stable plastic, the bellows 3 consists of a rubber-elastic, soft plastic, which is also in is able to apply the restoring forces necessary for the pumping process between the two housing parts 1 and 2.
• the housing part 1 consists of a substantially cylindrical, sleeve-like, relatively thin-walled hollow body 5 with an approximately half of its axial extent, slightly enlarged in diameter, lower guide section 6.
• This guide section 6 is axially displaceable in a guide cylinder 7 of the housing part 2 axially movably guided, wherein an inwardly projecting annular rib 8 overlaps the upper radial shoulder 9 of the guide section 6 at the upper edge and acts as an upper stroke limitation.
• the hollow body 5 of the housing part 1 is surrounded at a radial distance concentrically by a likewise thin-walled and cylindrical outer wall 10, which is approximately half as long as the hollow body 5.
• This outer wall 10 can be telescopically inserted into a cylindrical outer sleeve 11 of the housing part 2 until it limits the stroke movement of the housing part 1 is seated on the annular cover wall 12 of a screw cap 14 provided with an internal thread 13.
• the likewise thin-walled guide cylinder 7 is provided at its lower end protruding into the screw cap 14 with a tapered section 15, which has a flat end wall 16 with a central hose connector 17 on the outside and a cylindrical support ring 18 on the inside.
• the hose connector 17 and the support ring 18 are each arranged concentrically to the common housing axis 20, the diameter of the support ring 18 is approximately twice as large as the diameter of the hose connector 17.
• the end wall 16 has a bore 19 in its center through which the in Hose connection stuzten 17 attached suction hose 21 rait the interior of the guide cylinder 7 and the support ring 18 is in communication.
• the screw cap 14 is suitable for screwing the housing part 2 onto the neck of a can-like or bottle-like container provided with a corresponding external thread. Accordingly, the guide cylinder 7 is designed in its diameter so that it can be inserted into the neck of this container.
• the length of the suction hose 21 is adapted to the length of the container so that the suction hose 21 extends to the bottom of the container.
• the housing part 1 is provided at its upper end section with a radial nozzle nozzle 22 which forms the dispensing mouthpiece and into which a spray nozzle 23 is inserted.
• This spray nozzle 23 has a narrow spray opening 24 which is connected to an at least partially annular swirling space 25 of the nozzle connection 22.
• the swirling space 25 is connected via a wall opening 26 to an annular channel 27, which is formed between a cylindrical inner wall surface 28 adjoining the hollow body 5 and the outer annular surface 29 of an annular extension 30 projecting concentrically to the housing axis 20 into the hollow space of the hollow body 5 is and also occupies a concentric position to the housing axis 20.
• this extension 30 is designed as a cylindrical ring wall and is integrally formed on the closed end wall 31 of the housing part 1.
• This extension 30 has, on its outer annular surface 29 on its side facing the nozzle connection 22 or distributed over the entire circumference, a plurality of axial conveying channels 32 in the form of axial grooves, which, however, do not extend over the entire axial length of the annular surface 29, but rather only up to extend at the level of the spray nozzle axis 33 and which are each provided on the lower end face of the extension 30 with openings 34 through which they are connected to the interior of the extension 30 or the bellows 3.
• the approach 30 is of a relatively thin-walled, radial-ela stisc en enclosed annular wall portion 35, which rests with a certain prestress sealingly on the outer ring surface 29 and which forms the upper end portion of the bellows 3, on which it is integrally formed.
• the axial length of the annular wall section 35 projects beyond that of the conveying channels 32, so that the upper end section of the annular wall section 35 bears all around the uninterrupted part of the annular surface 29 of the projection 30 and, due to its radial elasticity, forms the movable closing element of the pump valve on the output side.
• the circumference of the annular wall section 35 of the bellows 3 is provided with a circumferential sealing rib 36 which bears sealingly against the cylindrical inner surface 28 of the hollow body 5 .
• a cylindrical expansion wall section 37 which is provided with a greater wall thickness than the foldable part of the bellows 3, adjoins the folding section of the bellows 3 which extends approximately over the length of the hollow body 5 and consists of zigzag-shaped folding rings.
• This expansion wall section 37 protrudes with its lower end sealingly and directly on the end wall 16 in the support ring 18 of the housing part 2, and it is provided with an annular end wall 38 which has a central passage opening 39 and a concentrically arranged inwardly directed, thin, cylindrical and radial - Has elastic ring wall 40.
• the stretching wall section 37 On its outer lateral surface, the stretching wall section 37 has a Circumferential, umbrella-like sealing lip 41 is provided, which bears sealingly on the inner surface of the lower section 15 of the guide cylinder 7, and in connection with the ventilation openings 42 arranged in the end wall 16 on the one hand allows air to enter the container and on the other hand that prevents unwanted outflow of the liquid to be sprayed.
• the already mentioned, located inside the bellows 3 displacement body 4 has a cylindrical shape and a length that is shorter by the stroke length of a pump stroke than the axial distance between the end wall 31 of the housing part 1 from the end wall 38 of the bellows 3
• the diameter is kept smaller than the inside diameter of the bellows 3 or the expansion wall section 37, so that the liquid to be sprayed can flow past it through the bellows 3.
• the displacement body 4 has an annular rib 43 which, in cooperation with the lowest fold ring 69, causes an axial movement limitation for the displacement body 4.
• the diameter of the displacement body 4 is held at least at its upper end section so that it can plunge into the cylindrical cavity of the projection 30 with radial play up to the end stop on the end wall 31 of the housing part 1.
• the displacement body 4 is provided with a partly conical, partly cylindrical, central valve pin 44, which has a smaller diameter and which is provided on its circumference with four distributed axial grooves 45. As can be seen from the drawing, these axial grooves do not extend over the entire length of the valve pin 44, but only in the area of the upper half of the valve pin 44.
• valve pin 44 in cooperation with the radially elastic ring wall 40 on the one hand as axial
• the conical part of the valve pin 44 is matched to the inside diameter of the ring wall so that this ring wall 40 under the pressure conditions prevailing in the bellows 3 during an output stroke until shortly before the end of the delivery stroke sealingly rests below or outside the axial grooves 45 on the uninterrupted conical lateral surface and the suction-side pump valve is thus closed, but only when the displacement body 4 at the end of the stroke movement of the arrow 46 in the direction of arrow 46 Housing part 1 of the end wall 31 with its valve pin 44 is pressed so far into the ring wall 40 that the lower ends of the axial grooves 45 also dip into this ring wall 40 and establish a connection between the interior of the bellows 3 and the passage opening 39, which via the Bore 19 and the suction hose 21 communicate
• valve on the output side does not open before the spray pressure in the bellows 3 is reached, in the exemplary embodiments of FIGS. 1 and 2, 3 and 4, and 8 and 9 each have a device for generating a mechanical pressure point between the housing part 1 and the housing part 2.
• This pressure point device is intended to ensure that before opening the pump valve on the output side, ie before the radial lifting of the elastic ring wall section 35 from the ring surface 29 of the extension 30, onto the cover wall 31 of the Housing part 1 in the direction of arrow 46 is exerted such a strong force that after overcoming the pressure point during the remaining pumping stroke in the bellows 3, the spray pressure, which is sufficient to achieve a satisfactory spray effect on the spray nozzle 23, is fully effective.
• this mechanical pressure point device is provided in the form of a tongue-shaped section 48 of the hollow body 5 which is freely cut by two axila slots 47.
• This tongue-shaped section 48 is provided on its outside with a projecting transverse locking rib 49 which, in the upper end position of the housing part 1, that is to say in the starting position, lies above or outside the inwardly directed annular rib 8 of the guide cylinder 7 of the housing part 2 and that when the housing part 1 is actuated in the direction of arrow 46 of the downward movement, there is initially a resistance which is so great that the force required to overcome it is also sufficient to generate the spray pressure inside the bellows 3.
• the spray pump shown in FIGS. 3 and 4 differs from that of FIGS. 1 and 2 only in that it is provided with a different pressure point mechanism. The rest of the structure is the same.
• This pressure point mechanism consists of two diagonally opposed ratchet cams 53 and 54 arranged diametrically opposite one another on the inside of the outer sleeve 11 of the housing part 2, on which the Bottom edge 54 of the outer wall 10 of the housing part 1 is initially seated after a short initial movement in the direction of the arrow 46.
• the further downward movement of the housing part 1 is opposed to such a great resistance that the force required to overcome it is sufficient in any case to generate the spray pressure required for a satisfactory spray effect inside the bellows 3.
• the thin walls of the outer sleeve 11, on the one hand, and the outer wall 10, on the other hand provide the required elasticity, which enables the pressure point to be overcome or the further downward movement with simultaneous radial deflection of the locking cams 53 and 54.
• the two parts 10 and 11, which are telescopically guided one into the other anyway with radial play, are deformed slightly elliptically.
• the presence of the mechanical pressure point device thus ensures that at the beginning of an output pump stroke the output-side pump valve is only opened when the force required to generate the spray pressure inside the bellows 3 is exerted on the housing part 1 in the direction of arrow 46 and that as a result thereof a premature dripping out of liquid from the spray nozzle 22 is avoided.
• the housing part 1 is in the center of the hollow cylindrical projection 30 with a locking pin
• a hollow cylindrical displacement body 4 which at its upper end has four radial-elastic locking segments 62 which are separated from one another by axial slots 61, but which are otherwise integrally formed, and which are each provided with a funnel-like conical end face 63, on which the rest shoulder
• the displacement body 3 is provided with a truncated cone-shaped valve pin 65 which, like the conical part of the valve pin 44 in the exemplary embodiments in FIGS. 1 to 4, is an opening and closing valve part with the radially elastic annular wall 40 of the bellows 3 interacts.
• This valve pin 65 has no axial grooves on its outer surface. However, it is therefore also not suitable for opening the suction-side pump valve at the end of a pressure stroke or discharge stroke.
• the valve pin 65 is surrounded by a thin, interrupted by axial slots 66, also integrally formed on the displacement body 4. Ring wall 67, which is supported during the output stroke of the housing part 1 in the direction of arrow 46 on the end wall 38 of the bellows 3. During this time, the valve pin 65 is pressed somewhat deeper into the ring wall 40. If, for example, an axial pressure is exerted on the end wall 31 of the housing part 1 in the direction of arrow 46 in the direction of arrow 46 in order to carry out an output or pressure stroke, this pressure is first applied via the locking shoulder 59 of the ratchet pin 50 transferred to the locking segments of the displacement body 4 and pushed so far down that its ring wall 67 sits on the end wall 38 of the bellows.
• position illustrated 8 sets by 'the restoring force of the Faltenbalg ⁇ 3 instantly remind constitution ⁇ movement of the housing part 1 in the in Fig. A.
• the displacement body 4 is also initially carried along until its ring rib 43 is stopped by the lowest fold ring 69 of the bellows 3.
• the locking pin 58 returns to its initial position shown in FIG. 8, in which its locking shoulder 59 flies against the conical end faces 63 of the locking segments 62. So that the lowest rib ring 69 resting on the annular rib 43 does not hinder the inflow of liquid into the upper part of the bellows 3, it is provided with a few interruptions 43 '.
• no means for generating a mechanical pressure point are provided, which means that the two housing parts 1 and 2 neither a tongue-shaped section 48 with a locking cam 49 nor Have locking cams 53.
• the shoulder 30 of the housing part 1 which is provided with a smaller inner diameter, is provided with a closure collar 70 which is integrally formed as an extension and which, as shown in FIGS. 13 and 15, in the starting position of the two housing parts 1 and 2 sealingly abuts the inner surface of the uppermost inwardly projecting fold ring 68.
• annular groove 71 adjoins this closing collar 70, which in turn ends at an annular collar 57, which is also present in the embodiment of FIGS. 8 and 9, albeit in a slightly different form, but for the same purpose is.
• the annular groove 71 is designed such that it can freely receive the uppermost pleated ring 68 after a certain initial movement of the housing part 1 and the locking collar 70 during the remainder of the pump stroke, so that liquid can flow through the annular groove 71 unhindered to the delivery channels 32 or through the output-side pump valve can flow to the spray nozzle 23. This functional position is shown in FIG. 16. As can be seen from FIGS.
• the fold rings of the bellows 3 are pressed together towards the end of the discharge stroke so far that the uppermost fold ring 68 rests against the collar 57 and prevents any further liquid supply to the delivery channels 32. This effectively prevents liquid from dripping from the spray nozzle 23.
• the generation of the hydraulic pressure point occurs in that at the beginning of an output or. Pressure stroke is initially prevented by the closing collar 70 still sealingly against the inner surface of the uppermost fold ring 68 and the supply of liquid from the inside of the bellows 3 to the delivery channels 32.
• a lifting of the locking collar 70 from the uppermost folding ring 68 are effected, so that the passage of liquid to the delivery channels 32 is released ⁇
• there is an axial pressure necessary which is certainly sufficient to generate the spray pressure inside the bellows 3, which is necessary for the perfect spraying of the liquid.
• the spray pump is also achieved with a hydraulic pressure point device in this case, that the force required to overcome the pressure point while maintaining the required spray pressure in the bellows 3 results in the delivery stroke being carried out completely.
• the displacement body 4 provided in the exemplary embodiment in FIGS. 14 and 15 consists of a solid cylindrical body with an upper part 4 ′ which is tapered in diameter and which can dip into the cylindrical cavity of the projection 30. At the lower end, the displacement body 4 also has a conical valve pin 65, which is surrounded by a slotted ring wall 67. In contrast to the valve pin 65 of the hollow-cylindrical displacement body 4 shown in FIGS. 8 to 12, in the present case the valve pin 65 in the upper part of its conical outer surface again has four axial grooves 45, which serve the same purpose as the axial grooves 45 of the valve pin 44 in the exemplary embodiments of FIGS. 1 to 4. This means that the valve pin 44 in exemplary embodiments 1 to 7 could also have the shape shown in FIGS. 13, 14 and 18 and described above with 'conical axial grooves 45.
• valve pins 44 and 65 of the displacement body 4 interact with the elastic ring wall 40 in such a way that liquid is sucked into the bellows 3 through the ring wall 40 past the valve pin 44 and 65, respectively, during the dispensing stroke following a dispensing stroke.
• the valve pin 44 or 65 is temporarily slightly pushed out of the annular wall 40. With the vertical normal position of the spray pump, the valve pin 44 or 65 returns to its closed position at the end of a delivery stroke.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=6364557

Family Applications (1)

Country Status (2)

Cited By (6)

Families Citing this family (6)

Citations (4)

Family Cites Families (2)

• 1988
  • 1988-10-07 DE DE3834091A patent/DE3834091A1/de active Granted
• 1989
  • 1989-10-07 WO PCT/EP1989/001177 patent/WO1990003849A1/de unknown

Patent Citations (4)

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