DE2209015A1 - Pump, especially for spraying liquids - Google Patents

Description

The invention is particularly directed to a hand operated pump for pumping fluids and liquids directed, in which part of the pump chamber is formed by an elastically deformable wall and in which the Pumping action that promotes liquids or disinfectants by increasing and decreasing the volume of the pump chamber is achievable.

The!, RfiMung is based on the task of creating a simple Means economically producible within a short time Accessible and reliable, hand-made; itable Create pump.

209838/0733

BATH ORIGINAL

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Pump of the type mentioned is characterized according to the invention in that a substantially flat membrane made of elastic material has a first, second and third zone to which, respectively a first, second and third chamber enclosed by a support body connects that an inlet with the second zone forms a normally closed inlet opening, which when the pressure difference increases opens between the first and the second chamber over a first threshold or limit value and in the open state connects the first with the second chamber so that an outlet with the third zone forms a normally closed outlet opening which, when the pressure difference increases opens between the first and the third chamber over a second threshold or limit value and in the open state connects the first to the third chamber, and that to supply fluid from the inlet to the outlet opening pump, the volume of the first chamber can be changed to a selectable extent.

The invention is illustrated more schematically below with reference to the hand Drawings of several embodiments with further details explained. In the drawing shows:

l'ig. 1 shows a section through a first: Yusiührungsform of Pump,

! '' ig. 2 shows a section through part of the pump Fig. 1 to illustrate the operation of this pump part,

Fig. "> A bottom view of one for use in elastic member suitable for the first embodiment of the invention,

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Fig. 4 is an oblique view of the pump part according to Fig. ^,

Fig.:> A front view of the assembled pump in the first implementation after the invention,

i'ifT. 6 is a side view of the assembled pump after Fir'r. 5,

7 shows a section through a second embodiment the pump,

! '' ig. b a plan view of the injection molding technique from ge i'ühi'ton btützkör-per to :, / αιί would take the elastic member in the first embodiment according to the invention,

: ^r 'ig. 9 one-n-section corresponding to the line 9 - 9 in

l'ig. 10 a section through a third embodiment After the invention,

rig. 11 is a sectional du3 ⁿ ch a fourth embodiment of the invention,

12 shows a section through a fifth embodiment according to the invention and

f'ir. '. 1 * a section through a sixth embodiment according to the invention.

in Fii ·. 1 in its entirety with 10 designated pump has an injection-molded part 11 and an elastic part 12 made of an elastomer hay. The injection-molded part 11 is essentially composed of two sub-members 14 and \ ^v i

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together, which are connected to one another by a web 16 made in one piece with these. It is known to produce objects, such as the injection-molded part 11, from materials such as polypropylene, which can withstand repeated bending stresses without breakage or damage, even when designed with very weak cross-sections. The partial member has a central part 18 in which an opening or an inlet 19 is formed, which is in communication with a bore 20. According to FIG. 2, a liolir 23 can be connected to this, which is guided downward into a container 25 (Pig. B) , on the upper part of which the pump 10 according to FIG. 1 is arranged. To achieve a pleasing appearance, the gradual transition to the top of the container is made by a conical flange 21.

On its upper linden tree, the partial link 14 carries a protruding one Approach 22, the bore 24 of which is in communication with a spray nozzle 26.

The resilient or made of an elastomer member is formed similar to the part which is in the US patent 3 486 663, relating to "Pump and check valve made of elastomer material", is described and shown. That elastic member 12 has a hat-like cap 27, a sealing rib 30 extending in the circumferential direction and a Projection 31> into the bore 24, leaving one itself can be received along the bore extending passage 32. From a wall 28 go in an oblique direction to the middle part 1Ö towards two partitions 34 and 35, which are enclosed between the central part 18 and the elastic member 12 Space in a middle chamber 37 »a rear chamber 38 and a divide front chamber 40.

The tube 23 inserted into the bore 20 is dimensioned so that it extends to the upper end 41 of the bore 20. In

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the bore 20 goes from the lower end of the bore a longitudinal recess 42 up "to a passage 44, which means a flap 46 formed in one piece with the elastic member 12 and closed by a ventilation chamber or air chamber 47, which is formed in the partial member 15 of the injection molded part 11, can be separated. The flap 46 works as a flap valve and allows air access to the (not shown) container as soon as the contents of the container, as a result of the pumping action has sunk so far that air must be supplied to expel the pumped volume.

In the embodiment according to FIG. 1, the reduction in size of the volume of the central chamber 37 due to the elastic deformation of the hat-like cap 27 liquid or fluid pumped from inlet 19 to spray nozzle 26. Since the partition walls 34 and 35 are inclined towards the central part 18 are arranged, a reduction in the volume of the chamber 37 causes the partition 35 to rest securely on the central part 18. The partition wall 34 is raised, but upwardly from the central part 18 and allows the drainage of liquid or fluid from the central chamber 37 between the central part 18 and the partition wall 34 through. The liquid or fluid then passes into the passage 32 and flows from there via the spray nozzle 26 out of the pump. When you cancel the hat-like cap 27 acting deforming pressure force, the cap 27 is due to its natural resilience in its initial position back and thereby increases the volume of the central chamber 37, so that the partition wall 34 securely on Central part 18 rests, while liquid or fluid is discharged as a result of the reduced pressure in the central chamber 37 the ßohrung 20 via the inlet 19 into the rear chamber 38 and is sucked from there under the partition 35 into the central chamber 37. Since as a result of the pumping action of the liquid or. If the fluid level in the container drops, it is necessary to the container to compensate for the pumped volume

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to supply air from outside. This occurs naturally as a result of the action of the flap 46. Once the difference has reached a certain value between the pressures prevailing inside and outside the container, the Flap 46 in the arrangement shown in FIG. 2 to the left and allows air to flow into the container from the atmosphere.

Fig. 3 and 4 show the structure of the elastic or from a Elastomer material made member 12 with the integrally adjoining flap 46 and part of the Partial member 15 of the injection molded part 11, which cooperates with the flap. The lower end of the ventilation or air chamber 47 can be seen in FIG.

Figs. 5 and 6 show the pump according to the first embodiment in assembled condition. The partial member 15 of the injection molded part 11 acts as a kind of protective collar for the hat-like cap 27 », however, without the unimpeded actuation of the To impair the cap on the part of the operating personnel by pressing with the thumb.

Fig. 9 Zej $ a slightly modified embodiment of the invention, in which the spray nozzle 26 belongs to a nozzle arrangement 48 which can be pushed onto a projecting extension 50 is. This approach 50 has a groove 51 which widens to an inlet 52 and through the middle part 18 in one Area is passed, in which there is a connection with the front chamber 40. In this modified embodiment is an elastic member 12 · performed without the projection 31 (Fig. 1). However, it is essential that the in Fig. The modified embodiment shown is very similar to the embodiment according to Fig. 1 is.

Reference is now made to FIG. 7, which shows a second embodiment according to the invention. One in its entirety with

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53 designated pump knows an injection molded part 54 with a Middle part 55, a fastening or connecting element 56 and an operating lever 58. Instead of an elastic Link 12, such as shown in Fig. 1, is in the embodiment according to "Fig. 7 an elastic membrane 60 is provided which has a flat section 61, an inner bead 63, an outer VmIst 64, a projection or lug 66, a first flap 68, a second flap 69 and a ventilation respectively. Air damper 71 has. The fastener 56 operates with the middle part 55 together so that the elastic membrane 60 is firmly held and that the inner and outer Bead 63 and 64 fulfill the tasks of O-rings and seal the various chambers against each other. In the upper region of the middle part 55 is a projection 72 with a Inner bore 73 is provided, into which the projection or the projection 66 penetrates. This approach 66 is so measured that after the insertion of which into the bore 73 leaves a passage 75 which is in communication with a nozzle outlet 76. On the middle part 55 a recess 78 is worked out, which with the flat section 61 of the elastic membrane 60 a central chamber 80 forms. The first flap 68, which fulfills a valve function, is a unidirectional valve which provides the transition of fluid from central chamber 80 to passage 75, but not the other way around Execution, allow. The second flap valve 69 also acts in one direction and enables the inflow of liquid or of fluid from a bore 82 via a passage 83 into the central chamber 80, but not in the reverse direction. In this way it is achieved that the pump 53 in a cyclical change between volume enlargement and volume reduction in the middle chamber 80 liquid resp. Conveys fluid from the bore 82 to the nozzle outlet 76. The actuating lever 58 has a hemispherical curvature 85, which fits to the recess 78 and by the elastic deformation of the flat portion 61 of the elastic membrane

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against the recess 78 to the contents of the central chamber scaled down. When the operating lever 58 is released, the flat portion 61 of the elastic membrane 60 takes as a result of it natural resilience in its initial shown in Fig. 7 Position again and thereby increases the volume of the central chamber 80.

Similar to the first embodiment of FIG Here, too, the ventilation or air flap 71 via an opening 86 and an anger 82 'allows atmospheric air to enter the Container closed, on the upper area of which the pump 53 is supported. The pipe to be inserted into the bore 82 should be extend to the top of this hole.

In a third embodiment, corresponding to FIG. 10, a pump 87 has a first sub-member 88, a second sub-member and a third sub-member 90. An elastic membrane 91 has two beads 92 arranged concentrically with one another and 93a, which perform the role of 0-rings and seal the various chambers against each other. The ice part member 88 has a bulge 93 and connecting or. Fastening members 94 for clamping the inner Bead 92.

Second and third sub-members 89 and 90 are designed so that that they cooperate with the first partial member 88 and clamp both the inner and the outer bead 92 and 93a, respectively.

On the elastic membrane 91, a first zone 96, a second zone 97 and a third zone 98 are formed, which are different Tasks are described below. The first zone 96 works with the bulge 9? together and causes an increase or decrease in the volume of a central chamber 100 formed between the two. The second zone

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has a conical recess 102 into which a conically beveled recess arranged on the second partial member 89 Plug 103 fits tightly.

In the area of the third zone 98, a further conical recess 104 is formed on the elastic membrane 91. That first partial member 88 has a hollow, conically tapered one Approach 106 with a central bore 10? ', With the one Nozzle 108 cooperates via a nozzle outlet 109 communicating with the central bore 107. The one above the The middle chamber 100 located in the first zone 96 stands above the outer one Bead 92 with a chamber 110 formed over the second zone 97 and one over the third zone 98 shaped chamber 112 in communication.

at the first zone 96 of the elastic membrane 91 in In accordance with the drawn in "arrow 114, it acts upwards Force causes a reduction in the volume of the central chamber 100 and moves the second zone 97 downwards against the conically tapered stopper 103, so that the conical recess 102 formed therein is securely closed. At the same time, the third zone 98 of the elastic membrane 91 is moved downwards by this pressure force, so that it moves from the conical surface of the hollow, conically tapered attachment a 1OG lifts off and the outflow of the liquid or the 'Jtrüuungsmittel aus3 the middle camera 100 around the cone-shaped angular approach 106 around in the central bore 107 and from there into the outlet 109. The second sub-member according to the embodiment of FIG. 10 forms one oc-.u ^ & anal 116, in which radially aligned support arms 117 for the support of the conically shaped stopper 103 are. The Jaugkanal 116 stands over a (not shown) itohr in connection with a suitable container.

209838/0736

220901S

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Fig. 11 shows a fourth embodiment of the invention, which is that in Pig. 10 shown is very similar. For the sake of simplicity, the Pig. 10 and 11 similar parts, especially in the area of the right half of the drawing, are not described again in detail. The left half of the drawing in Pig. However, FIG. 11 shows a different structure of a first partial link 88 '. A conically tapered stopper 118 is supported on this first sub-member 88 'and engages in a conical opening 104' of an elastic membrane 91 '. By reducing the size of the central chamber 100 *, a right conical recess 102 'is securely closed and a third zone 98' of the elastic membrane 91 'is moved downwards and thereby lifted off the conical surface of the conically beveled stopper 118. In this way, liquid or fluid located in the central chamber 10O ¹ is pumped into an outlet or outlet 120.

Reference is now made to FIG. 12, in which a fifth Embodiment according to the invention is shown. One in hers The unit designated 122 has an elastic diaphragm 124 or a diaphragm 124 made from an elastomer, a hemispherical one curved, elastic part 126, or part produced from an elastomer, an essentially rigid cast base body 127 and one with this cooperating Hing 128. The elastic, hemispherical part 126 has a circumferential plunge 130 that elastic membrane 124 has a circumferential bead 132. Through the on a peripheral portion 133 of the essentially rigid .Grundkörper 127 acting clamping force of the cooperating with this Ring 128 is the splash 130 along its circumference can be pressed against the circumferential bead 132.

A substantially rigid body 127 is an inlet and an outlet 137 formed, of which the former has a

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cd.elite connection to an iJaugrohr 1 ' ^J 3, the latter is connected via a tight connection to a nozzle 140 and to its nozzle outlet 141. A first, radially oriented support arm or support cross 142 arranged in the inlet 1 ^ 5 supports a conically tapered! Plug 144 in a centered position within the passage 1? 7 is secured by means of a second, radially aligned support arm or support cross 146. The elastic or elastomeric membrane 124 has a first conical, upwardly tapering recess 150, which seals with surface contact with the conical beveled stopper 144, as well as a second conical, downwardly tapering recess 152, which by surface contact with the with reverse conical shape tapered plug 148 causes a seal in this area.

The essentially rigid base body 127 continues to close a ventilation or air chamber 154, on the substantially circular upper hand 155 of which the elastic or Membrane 124 made of an elastomer is resiliently supported. The air chamber 154 is in communication with the atmosphere via an opening 156 and opens into a passage 157 Container from which the pump flows via suction pipe 138 igle ext sucks.

A shut-off member 158 with predominantly longitudinal extension is connected in one piece to the elastic membrane at right angles to the general plane of the diaphragm 124 extends below and at its end facing away from Ivlernbran 124 ' has an extension 160. This is dimensioned and arranged so that in the rest position of the membrane 124 at the top Hand 155 the air chamber 154 the extension 160 tightly into the Opening 156 fits and closes it.

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If now, in the direction of the arrow drawn, a downward pressure force is applied against the elastic or made of an elastomer, exerted hemispherical curved part 126, the volume of space between this and the elastic or membrane 124 made of an elastomer Chamber 161 reduced in size. As a result of this reduction in the volume of the chamber 161, the pressure in this chamber rises. It follows that the diaphragm 124 securely to the cone-shaped tapered stopper 144 rests and at the same time bridged downward and thus out of engagement with the with inverted cone shape tapered plug 148 is moved out. Fluid or fluid located in chamber 161 Liquid therefore flows out of the chamber 161 via the second conical recess 152 into the outlet 137. From there the fluid or the liquid is conveyed to the nozzle outlet 141 and sprayed out from there. When you cancel the the elastic, hemispherical arched part 126 acting and downwardly directed compressive force passes the member 126 automatically returns to its initial position shown in Fig. 12, so that the volume of the chamber 161 increases, the However, the pressure prevailing therein is reduced and the second conical recess 152 is sealed off from this System on the tapered stopper 148 with an inverted cone shape results. At the same time, the membrane 124 rises upwards from the conically tapered stopper 144 and sucks fluid or liquid from the inlet 135 into the chamber 161 at. Simultaneously with this, further liquid or further fluid is drawn out of the container via the suction pipe 138 promoted above.

With each downward stroke, the pressure in chamber 161 increases. This is the middle part of the elastic membrane 124 slightly pressed in in the area of the shut-off element 158, so that the extension 160 at the end of the shut-off member 158 moves downward away from the recess 156 and thereby this

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The recess opens and allows atmospheric air to flow into the air chamber 154. From there the air flows over the passage 157 into the container and equalizes that which is pumped out Volume out.

In a sixth embodiment, corresponding to FIG a pump designated in its entirety by 163 with a rigid support body 165 and, to match, with a first i'eil member 166 and a second part member 167 equipped. An elastic membrane 16d or one made from an elastomer has an internal continuous bead 169 and an external continuous bead 171. These two ridges 169 and 171 are between cooperating Sections of the rigid support body 165 and the first and second partial members 166 and 167 can be clamped. The first partial link 166 includes a cylindrical portion 173 in which a radially oriented support cross 174 for support a conically tapered plug 176 is arranged. The elastic membrane delimits the area of this stopper 176 168 in cooperation with a wall 178 and with the inner and outer beads 169 and 171 an inlet chamber 180. In the area of which a conical recess 181 is worked into the membrane 168, which tapers upwards and can be closed by contacting the surface with the upper end of the conically tapered plug 176. On the cylindrical views Section 173 is connected to a suction pipe 182, via which the conical recess 181 fluid or liquid can be supplied as soon as in the area above this recess the pressure has dropped.

In the left half of the drawing the 3J ¹ Ig. 13, an access channel 183 is formed in the rigid support body 165, which opens out at its lower end into a circular hand I84 and with this rests against the elastic membrane 168. This rests resiliently on the circular iiand 184 and thus, in the normal state, closes this end of the outlet channel I83.

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A nozzle 186 with a nozzle outlet 187 is arranged in such a way that the outlet channel 183 communicates with the nozzle outlet 187 stands.

The second sub-member 167, which cooperates with the support body and the membrane, has an opening into the atmosphere Air gap 18g, which causes the in the area of the circular edge 184 between the inner and outer Bead 189 or 171 located section of the elastic membrane 168 is bent downwards and thus exposes the end of the outlet channel I83.

The rigid support body 165 has a hemispherically curved part 190, which with the elastic membrane 168 has a central chamber 192 limited. This stands with the inlet chamber 180 and with an annular chamber surrounding the circular edge I84 193 in connection.

If the middle section of the elastic membrane 168 is now deformed in the direction of the hemispherically curved part 190, this results in a reduction in the volume of the central chamber 192 and an increase in the pressure in this chamber. This increased pressure is transmitted both to the inlet chamber 180 and to the annular chamber 193 »so that the elastic The membrane 168 is pressed downwards against the conically tapered stopper 176 and thus the conical recess is sealed against this plug. Also the section of the elastic membrane 168 located in the area of the annular chamber 193 moves downward, away from the circular edge 184, that the contents of the central chamber 192 via the outlet channel 183 is ejected and sprayed through the nozzle outlet 187. After the force which deforms the elastic membrane 168 has been released the membrane goes back to the position shown in Fig. 13 due to its natural resilience, which calibrates the Volume of the central chamber 192 increases and the pressure prevailing therein decreases. The elastic membrane 168 comes to

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secure sealing again in contact with the circular edge 184 and at the same time draws its conical recess 181 at the top out of engagement with the tapered one Plug 176 out. This is done over the conical recess 131 from the suction pipe 182 and the cylindrical portion 173 Liquid or fluid is sucked into the inlet chamber 180 and from there into the central chamber 192.

The pumps described are particularly suitable for spraying or atomizing liquid cosmetics, deodorants, insecticides, rust inhibitors and the like.

209838/0736

Claims (8)

Claims 1J pump, characterized in that a essentially flat membrane (12; 60;; 91; 124; 168) made of elastic material, a first, second and third Zone (27,28,31; 61,66; 96,97,98) to which ^ each one of a support body (11; 54; 88; 126; 165) enclosed first, second and third chamber (37,38,40; 80, ..., ...; 100,110, 112; 161,135,137; 192, ..., 183) is followed by an inlet (19; 83; 116; 138; 182) with the second zone a normally forms closed inlet opening, which when the pressure difference increases between the first and the second Chamber (37,38; 80, ...; 1OO, 112; 161,135) over a first Threshold or limit value opens and in the open state connects the first with the second chamber that an outlet (24; 75 »107; 140; 183) with the third zone one normally forms closed outlet opening, which increases when the pressure difference between the first and the third chamber (37.40; 80, ...; 1OO, 11O; 161.137; 192.183) over a second Threshold value or limit value opens and, in the open state, connects the first to the third chamber, and c & ß, um To pump fluid from the inlet r to the outlet opening, the volume of the first chamber (37 »80; 100; 161; 192) can be changed to a selectable extent. 2. Pump according to claim 1, characterized in that that the inlet (116; 138; 182) one in the direction of the second chamber (110; 135) to the first chamber (100; 161; 192) has tapered conical surface that the membrane (91; 124; 168) in the second zone has a conical Recess (102; 102 '; 150; 181) has the counterpart 209838 / U736 to the conical surface forms -and when the pressure is equal between the first and the second chamber rests against this with surface contact. 3. Pump according to claim 2, characterized in that the outlet (107; 140) one in the direction of the first chamber (100; 161) tapering to the third chamber (112; 137) has conical surface that the membrane (91; 124) in the third zone has a conical recess (104; 152), which forms the counterpart to the conical surface and when the pressure is equal between the first and the third chamber rests against the latter with surface contact. 4. Pump according to claim 2, characterized in that the outlet (18g) has an internally hollow tubular member (184) which rests at one end with an opening in the region of the third zone on the membrane (168), the third chamber and is enclosed by the third zone, and that _: the surface of the third zone adjacent to the opening is in communication with the first chamber (192) and the other surface of the third zone is in communication with the atmosphere. 5. Pump according to claim 2, characterized in that that the second and third zones (28,31; ···· »66; 97.98) each connect to the first zone (27.61; 96). 6. Pump according to claim 2, characterized in that that the first zone (27 »61; 96) is accessible from the outside for the hand and for changing the volume the first chamber (37; 80; 100; 161; 192) in any way is deformable. 209838/0736 7. Pump according to claim 2, characterized in that a section enclosing the first chamber (161) (126) of the support body for changing the volume of the first chamber (161) elastically deformable by hand is. 8. Pump according to claim 7, characterized in that that the first zone (27; 61) is deformable in one direction with increasing pressure in the first chamber (37; 80) is and is designed so that when deformed in this one direction a vent valve (44,46,47; 71.86) opens. 209838/0736