WO1998011995A1

WO1998011995A1 - Outlet valve, especially for a hand pump, and the pump

Info

Publication number: WO1998011995A1
Application number: PCT/EP1997/002283
Authority: WO
Inventors: Fritz Meckenstock
Original assignee: Fritz Meckenstock
Priority date: 1996-09-20
Filing date: 1997-05-05
Publication date: 1998-03-26
Also published as: AU2891497A

Abstract

Disclosed is an outlet valve provided with an obturator for an outlet from a chamber likely to be pressurized, including a pump chamber, which, once a set pressure level is reached, triggers the outlet opening. In order to enable 'pre-charging' using a simple assembly, the invention suggests that the obturator (8) shall be able to move in a straight line from an obturating position to an opening position, and that movement towards the opening position shall run against a force exerted by a spiral spring or a bellow-type spring.

Description

00001 outlet valve, in particular for a hand-operated 00002 pump and hand-operated pump 00003 00004 The invention relates to an outlet valve with a Ver00005 closure element for closing an outlet opening 00006 of a pressurizable chamber, in particular a 00007 pump chamber, which opens the 00008 outlet opening at a predeterminable pressure and a manually operated pump 00009 is particularly suitable for the atomizing delivery of liquid 00010 media from a storage container and 00011 includes a 00012 pump chamber having an inlet valve and an outlet valve. Such exhaust valves and pumps are known in a variety of variants. DE-A 44 11 031 discloses a hand-operated pump in which a pump 00017 chamber is surrounded by a fixed piston and a displaceable cylinder - with reference to a fixed 00019 pump housing. If their volume 00020 is reduced by shifting the piston and cylinder against each other, a pressure builds up inside the pump chamber 00022 in accordance with the volume reduction until 00023 en nozzle-side outlet valve clears the way for, for example, a liquid medium from the pump chamber. 00025 However, it has been shown that the response behavior 00026 of these exhaust valves for some applications does not occur with sufficient uniformity. There is therefore the problem of improving the response behavior 00030 of such exhaust valves, in particular for the pumps mentioned at the beginning, with the simplest possible structure, however structurally reliable. 00033 00034 This technical problem is solved first and in essence in the subject matter of claim 1, at The focus is on that the closure element

00037 linear between a closed position and an open

00038 position is movable and that the movement m the open

00039 position against the force of a spring coil or

00040 bellows. The aim is that one

Predetermined pressure, the closure element after completion

00042 pressure build-up opens almost suddenly. This can be due to

00043 different ways can be achieved. With an execution

00044 approximately this is through the use of the bellows

00045 supported, which is almost after pressure build-up

Can suddenly move to the open position. at

00047 of another embodiment and preferably also if necessary

00048 m combination with the bellows, this is achieved by a

00049 idle stroke of the valve piston in a valve cylinder

00050 is sufficient, but only after passing through this idle stroke

00051 the opening to the spray channel takes place. Corresponding

00052 the pressurized content m

00053 of the chamber, preferably a pump chamber, released and

For example, 00054 can exit through a nozzle. As far as a spring

00055 bellows is used is the structure of the bellows

00056 advantageous for this. The compared to a pressure

0 ₀ 057 the one made of metal with only two conditions

00058 bellows, namely an unfolded and folded,

00059 can be correspondingly fast - if necessary after a certain

Open 00060 "Start-up section". A change in this effect

00061 tes was also able to perform a large number of load cycles

00062 cannot be determined. One after that with metallic

0 ₀ 063 springs change in elasticity behavior

00064 tens could not be observed. Such a thing

00065 behavior is particularly desirable for pumps which

00066 m irregular intervals only used

00067. In an advantageous further development,

00068 represents that the outlet valve s is guided linearly in an outlet opening ₀ 0069 of the pump chamber, from a closed position 0007 ₀ against the force of a bellows into a 00071 open position sliding closure element

00072 points. As a result of this training is opposite

Known pumps an extremely compact structure initially

00074 reached. Structurally simple, but of high functionality

00075 on security, is also the arrangement of the closure

00076 mentes of the exhaust valve directly in the exhaust opening

00077 the pump chamber. The support of the locking element

00078 mentes is preferably carried out by a compression spring force

00079 of the Federbalgeε, through which the closure element in

00080 the closed position is held. The spring

Bellows, for example, between the closure element and

00082 arranged the housing of a pump. As a result of one

Such an arrangement can in the open position of the

Clamping element tensioned bellows from the

Medium flowing out of the pump chamber. To

The pressure can be reduced by the bellows if necessary

00087 during its relaxation and the associated movement

00088 gene of the closure element in its closed position

For example, suck up liquid inside.

00090 This also makes the spring characteristic of the spring

00091 balges then co-determined. With a tight connection

The bellows with the housing can also be a

00093 other filling medium may be provided or a connection

00094 to the surrounding outside air, with which the air then

00095 can communicate half of the bellows. These addressed

Measures allow a wide influence on the

00097 behavior of the bellows and thus an attitude

00098 of the opening characteristic of the closure element

00099 using one and the same type of spring

00100 total In further, alternative configurations of the

00101 pump is provided that the outlet valve a in

00102 an outlet opening of the Ftmpenkammer linearly guided,

00103 from a closed position against the force of a spring

00104 in an open position sliding closure element

00105, the movement in the open position against 00106 the force of a plastic injection molded

00107 th spring takes place, the spring continuing from

00108 a middle area two oppositely aligned,

00109 each spiral-shaped spring arms on ice.

00110 Invention has been recognized that such

00111 spring with reliable spring properties simply in

00112 plastic injection molding process can be produced.

00113 Through the middle area, which

00114 is equally large, is a central one

00115 injection point for the oppositely extending

00116 spring arms created. In a further embodiment

00117 also provided that the central area ring-like

00118 is formed. Alternatively, the spring that is

00119 injected integrally molded onto the closure element

00120 is essentially helical, spiral or with

00121 of the same diameter, with wide

00122 rer preferred embodiment, a closed ring

00123 provided on the upper side for support in the point housing

00124 hen. In a further embodiment, the

00125 closure element provided that this a protruding

00126 has cones, which m one to the pump

₀ 0 ₁ 27 chamber connecting first section of the outlet δff

00 ₁ 28 intervention. This cone has two meanings

00 ₁ 29 to. On the one hand, it serves as a guide and, if necessary

00 ₁ 30 centering the closure element and the other

00131 it reduces the volume attributable to the chamber volume

00 ₁ 32 men of the first portion of the outlet opening. This is

00 ₁ 33 is particularly advantageous if the volume of the

₀ 0134 Pump chamber of a pump for the first time through the inlet valve

00135 til is filled to the then contained in the chamber

00136 to keep compressible residual air as small as possible.

00137 For this purpose it is provided in a further development that the pin

00138 the volume of the first section of the outlet opening

00139 almost completely filled out. Depending on the training of the

001 ₄₀ outlet valve, the pin can also be 00141 protrude pu ppenkarrimer. It is thought

00142 that over the entire axial extent of the first

00143 section also extends the pin. In

00144 radial direction between the wall of the outlet opening

00145 voltage and the pin little play provided so that

00146 the pin in the first section largely

00147 can move smoothly. A preferred measure 00148 also provides that the pin on the side of the 00149 closure element has a thickened cross section.

00150 points which in the closed position the first

00151 cut the outlet opening seals. By

00152 this design of the closure element is a first

00153 Measure for sealing the outlet opening and thus the

00154 pump chamber given. For this purpose, the

00155 conical outlet opening in its end area, in which

00156 before widening with bevelled counter surfaces

00157 cross-section thickening engages, whereby a funnel

00158 nested, self-centering

00159 Creation of the cross-section thickening and the wall of the

00160 outlet opening is given. With regard to the closure

00161 element is with respect to all described execution

00162 shape that this is in the outlet opening,

00163 in which the closure element is guided, in any case

00164 is stiff in a first way. This

00165 Stiffness is preferred by a measure of

00166 closure element reached. If, for example, the exit opening

00167 has an internal dimension of 7 mm, the tolerance is

00168 ranz between 7 mm and 7 mm minus 1/10 mm

00169, however, the closure element with an outer diameter

00170 of 7.1 min as a minimum and, if necessary, a tolerance

00171 above of a further 1/10 to 2/10 mm. Another advantage -

00172 embodiment is the closure element and the

00173 bellows, or the aforementioned in plastic injection molding

00174 ren manufactured spring, with a continuous coil

00175 or with two spring arms aligned in opposite directions, 00176 and if necessary the pin in one piece made of plastic

00177 trained provided. For example as a molded part

00178 produces, is thereby a unit of the individual

00179 components created and thus a reduction in

00180 Overall components of such a pump

00181 tion of the components is also the functional security of the

00182 arrangement increased again. In a further embodiment

00183 provided that the closure element with a plate

00184 formed radially outwardly projecting lip

00185, which m of the closure division in a sealed

00186 the plant within a second section of the

00187 outlet opening is present at the one for the open position

00188 third section of expanded cross section

00189 closes, in which the lip with radial clearance

00190 is caught. As a result,

00191 drawing the formation of a cone, as it were

00192 funnel-shaped construction of the outlet opening with inserted

00193 tem closure element dai. Because in particular with one

00194 integral construction of the closure element and spring

00195 bellows already largely a linear guide of the

00 ₁ 96 closing element is opposed, since this relates to the

00197 evenly support the bellows over its circumference

00198 can, is also at the exit of the closure element

00199 given the outlet opening a safe re-entry.

00200 In the outlet opening, the closure element is inside

00201 of the second section through the on the wall of the

00202 led edge lip adjacent guide, which here

00203 are designed for elastic In an alternative

00204 and prefer training is provided, however, that

00205 the closure element plate-shaped with a from the outside

00206 edge-projecting cylindrical sealing collar

00207 det, which m locking position m a circumferential

00208 side sealing system within a second seal

00209 section of the outlet opening is

00210 next important that such a training 00211 fertilizer the closure element technically simpler for example

00212 as a molded part is to be executed. A poetic

00213 installation of the sealing collar can for example at one

00214 made from a comparatively soft plastic

00215 th closure element can already be obtained

00216 that its outer diameter compared to the inner diameter

00217 εer of the second section with a Tber dimension

00218 det. Alternatively, an annular seal on the sealing

00219 gene circumferential sealing lips can be provided. In a

00220 advantageous embodiment of the invention is also

00221 provided that the second section has a radial

00222 Durchoruch, which in the open position of the

00223 release valve, released by the closure element, one

00224 spray channel with the pump chamber via the outlet opening

00225 connects. As a result of this measure, the outflow takes place

00226 men from the pump chamber no longer axially with

00227 eating distraction, but the distraction is already taking place

00228 within the second section of the outlet opening. It

00229 is then advantageously the radial breakthrough

00230 directly with the spray channel having a nozzle

00231 connected. So distractions are emerging

00232 medium reduced to a minimum. This measure is

00233 m connection with a cylinder-shaped sealing

00234 gene having closure element in particular from

00235 advantage if the axial height of the sealing collar is greater

00236 is the axial length of the radial opening.

00237 This ensures secure guidance of the closure element.

00238 first given. It is also provided that the

00239 Federoalg is guided within a tube, wherein

00240 further preferred the tube in extension of the second

00241 APscnnittes the outlet opening is formed and that

00242 sealing element in its open position rests in the tube 0024 ^ sealingly, so the sealing element

00244 sam a toggle function too. In the closed position

00245 the pump element is removed from the closure element 00246 locks during the open position of the in the

00247 tube arranged bellows is completed. As a result

00248 of these measures, the bellows will not continue from

00249 flows around the outflowing medium. It can also

00250 for this reason the medium on the spring

00251 no longer put down the bellows and for example by

00252 Resin impair the function of the bellows.

00253 This tube can be fixed to the pupae housing

00254, but it is preferred that the tube is in one piece

00255 with the piston and that the tube, er

00256 ster and second section of the Auslaßöffnimg by a

00257 trained step bore through the piston centrally

00258 det s nd. This means that transverse to the axial extension

00259 avoided approaches and consequently a safe one

00260 and sealing contact of the closure element over the

00261 given total axial extent. It points out

00262 this arrangement an extremely small number -

00263 with appropriate composition of the components -

00264 of components only, namely with the piston

00265 tube, as well as the bellows with closure element and

00266 pins if necessary. With a pump in particular

00267 one or more of the features described above

00268 having exhaust valve, in the hand-operated

00269 Volume of the pump chamber for a pressure build-up-

00270 bar, it is further provided that the inlet valve

00271 and the outlet valve are arranged opposite one another

00272 are, in particular on a common axis, to the

00273 both valves essentially also rotationally symmetrical

Such training is prevented

00275 Pressure losses m connecting to the pump chamber

00276 lines. An unhindered entry and in particular

00277 outlet of the liquid stored in the storage container

00278 into the pump chamber or out of the pump chamber.

00279 mer is particularly given when the volume

00280 menu reduction by toe for example a squeeze 00281 the pump chamber along which the inlet valve and the

00282 axis connecting the exhaust valve. They are

00283 Valves, as it were, in the unchangeable end faces

00284 the pump chamber arranged centrally. Such

00285 Volume reduction can be done by

00286 ben a piston and a cylinder can be reached.

00287 In such fimps with nested, opposing

00288 piston displaceable on the insertion axis

00289 and cylinders enclosing the pump chamber

00290 further provided that the removal on the insertion axis

00291 opening in the piston surrounding the cylinder

00292 is arranged and that the closure element in the outlet

00293 opening is inserted on the outside of the pump chamber, which

00294 over the one opposite on the outlet opening

00295 side arranged bellows removed from the pump housing

00296 is based. This is a telescopic structure

00297 as it were, in which the individual functions

00298 elements always inserted in one direction

00299 are. As a result, it is extremely easy to assemble

00300 arrangement of the individual components reached. 00301

00302 Essential and currently as a design

00303 device preferred over that described above

00304 Sealing the bellows or the spring or the space in

00305 which the bellows or the spring is arranged by

00306 the closure element in its open position, the

00307 time that this room communicates with the spray channel.

00308 This can be achieved by a slight splitting effect.

00309 It is essential that in the process of the closure element

00310 tes in the closed position by moving up

00311 side of the closure element in the room in which

00312 the bellows or the helical spring is arranged, a lower

00313 pressure arises and therefore a suction effect. This suction

00314 fekt sucks liquid into the spray channel 00315 room one. This will prevent any dripping

00316 Pump further reduced or excluded.

00317

00318 As a material for the closure element and thus

00319 preferably one-piece spring or the bellows comes

00320 first POM in question. However, a is more preferred

00321 soft polyester material. It has been shown that

00322 this material on the one hand insensitive to prak¬

00323 table all media conveyed with such a pump

00324 is, but on the other hand also a sufficient Federei¬

00325 property and stability.

00326

The invention is based on the drawings, in which ledig¬

00328 Lich exemplary embodiments are shown, explained in more detail

00329 tert. The drawing shows:

00330

00331 Fig. 1 shows an exhaust valve according to the invention in a

00332 hand lever operated spray pump in its Ver¬

00333 final position,

00334

00335 Fig. 2 shows an enlarged detail of the exhaust valve

00336 according to FIG. 1,

00337

00338 Fig. 3 in a pump according to Fig. 1, the outlet valve

00339 in its open position,

00340

00341 Fig. 4, the open position of the exhaust valve in enlarged

00342 lower scale,

00343

00344 Fig. 5 is an enlarged view of a second

00345 example of an exhaust valve in

00346 its closed position,

00347

00348 Fig. 6, the outlet valve of FIG. 5 in its Offen¬

00349 position, and 00350 FIG. 7 shows an alternative embodiment with reference to FIG. 5, in an open position 00352 according to FIG. 6, 00353 00354 FIG. 8 shows a further alternative embodiment with regard to the design of the spring, in the form of a 00356 injection molded spring with two spring arms pointing in opposite directions; 00358 00359 Fig. 9 is an individual representation of a further alternative locking element with molded 00361 coil spring. 00362 00363 00364 Fig. 1 shows a manually operated pump which can be screwed onto a 00365 nozzle of a storage container - not shown - 00366. When the hand lever 00367 1 is actuated, the second lever arm 2 moves the cylinder 3 00368 upward against the piston 4 fixed to the housing. 00369 As a result, the volume of the pump chamber 5 is reduced 00370, cf. Fig. 3, and will build up a 00371 pressure within this. Against this pressure build-up, a 00372 outlet opening 6 of the pump chamber 5 is closed by an outlet valve 737. For this purpose, the outlet valve 7 has a 00374 closure element 8 which can be moved linearly between a 00375 closure position according to FIG. 2 and an open position 00376 according to FIG. 4. This movement into the open 00377 position takes place against the force of a bellows 9 supporting the closure element 837. If the pressure in the 00379 pump chamber 5 has reached a certain value, the bellows 9 will fold up very quickly, depending on the design 00381, and then fold Way for 00382 to clear the pressurized medium to a nozzle 1000383. For a fine and even atomizing exhaust 00384 be especially this way of liquid media

00385 should be kept as short as possible.

00386

00387 The folding of the bellows 9 can be done here

00388 visually its temporal behavior through the wall

00389 development can be influenced. It can go against that

00390 a sudden folding also described

00391 continuous folding take place.

00392

00393 After the pressure has been reduced in the pump chamber 5

00394 the force of the bellows 9, the closure element 8

00395 bring back into the closed position and the outlet

00396 Seal opening 6 of pump chamber 5 in a sealed manner. The

00397 as a return spring for the hand lever 1 serving bellows

00398 12 causes cylinder 3 to move downward

00399 and consequently an increase in volume

00400 of the pump chamber 5, which creates a negative pressure.

00401 This negative pressure opens the inlet valve 11 and

00402 is via the suction line 13 from the reservoir

00403, for example, liquid is introduced into the umpenkammer 5

00404 sucks. At the same time, the hand lever 1 is in again

00405 the actuation position according to Fig. 1 broke. The suction

00406 line 13, the inlet valve 11 and the outlet valve 7th

00407 are linear in a row on a common

00408 axis 25 formed. Pressure reducing corners

00409 gen or the like are largely avoided.

00410

00411 As the significantly enlarged representations according to the

00412 FIGS. 2 and 4 show the closure element 8 in the

00413 bore-like outlet opening 6 linearly displaceable

00414 led. Moving out of the locked position

00415 Fig. 2 in the open position of FIG. 4 takes place

00416 against Feder¬ working in the manner of a compression spring

00417 bellows 9. For this, the bellows 9 is supported against

00418 housing 14 of the pump. 00419 For an exact positioning jumps on the housing

00420 nenwand 15 a pin 3 in front of which the bellows

00421 9 is simply plugged on. As a result, it can

00422 Connection area bellows 9-pin 23 to leakage

00423 ten come with the consequences explained above. Alterna-

00424 can also be drilled through the housing 14

00425 can be provided, whereby the interior 16 of the spring

00426 tot 9 communicate directly with the ambient air

00427 can. 00428

00429 Alternatively, however, starting from the

00430 embodiments 5 to 7, deliberately provided that

00431 not only the outside of the bellows 9 but also

00432 whose interior or, in a comprehensive design

00433 also with regard to FIGS. 8 and 9 the space above

00434 of the closure element, with which the helical

00435 or coil spring is arranged with the spray channel 43

00436 communicates, then no connection to the outside

00437 is given. This is due to the

00438 NEN pumping or suction effect, for sucking back liquid from the spray channel 43 when the closing element 00440 moves to the closed position. 00441

00442 The closure element 8 is itself plate-shaped

00443 det, an edge lip 17 scraping radially outward

00444 is provided as can be seen this radial

00445 overhang achieved by a conical shape, see above

00446 that the lip 17 overall funnel-like

00447 a parallel to the direction of the longitudinal displacement

00448 extending funnel axis. From the plate bottom 18

00449 of the closure element 8 protrudes a pin 19 which

00450 rather into a first section 20 of the outlet opening 6

00451 engages with radial play. The first section 20

00452 of the outlet opening 6 connects directly to the pump

00453 chamber 5. To this extent, the pin 19 also 00454 a volume reduction of the volume of the Pufirtpei chamber

00455 5. 00456

00457 The pin 19 also serves to guide the

00458 final element 8, since it is also in the open position of the

00459 exhaust valve 7 usually still within the first

00460 section is caught. By further grading

₀ 0461 in the longitudinal extent of the outlet opening becomes a

₀ 0 ₄ 62 formed second section 21, the cross section

00463 is matched to that of the querying lip 17,

00464 such that in the closed position according to FIG. 2 the

00465 lip 17 in a sealing system within this

00466 ses second section 21 abuts. A third

0 ₀ 467 section 22 then has a cross section in which

00 ₄₆₈ the lip 17 in the open position of the closure element

00469 tes 8 is caught with radial play, so that between

00470 the wall of the outlet opening 6 and the closure element 8

004 ₇₁ an outlet of the pressurized medium from the

₀ 0 ₄₇₂ Purtirjenkammer 5 through the outlet opening 6 he ög-

₀ 0 _{473 is} light, cf. Fig. 4. Through the graduated transverse

004 ₇ 4 sections of the three sections 20, 21 22 is as it were

₀ 04 ₇₅ a funnel-shaped inlet for the closure element 8

004 ₇ 6 created. This is advantageous, for example, with regard to

00477 an assembly. 00478

0 ₀ 479 However, it is more preferred that an outer diameter

00480 of the lip 17, below, in the larger area, with a

004 ₈₁ Excess to the inside diameter of the outlet opening

00482 forms. With regard to the embodiment of the

00483 FIG. 2 is in any case an oversize to section 21

₀ 048 _{4 given} the outlet opening. On the above already

Reference is made to ₀ 0 ₄ 85, for example. Of

00486 Meaning in more detail that the

00487 lip 17 on the end edge, ie in the area of your

00488 largest diameter not sharp-edged 00489 is, but rounded. The rounding can here be very tightly designed, for example with a radius of 1/10 00491 mm. However, it has been found that this individual configuration is important with regard to the permanent function of the 00493 pump. 00494 00495 pin 19, locking element 8 with lip 17 and 00496 bellows 9 are formed in one piece in this embodiment. Thus, the outlet valve 7 00498 consists of only one element, preferably an elasti00495 plastic, which cooperates with the outlet opening 6 of the 00500 pump chamber 5, for which purpose it is only 00501 inserted into the outlet opening 6 on the outside of the chamber 00502. 00503 00504 As shown in FIGS. 1 and 2, the cylinder 3 00505 and the piston 5 are also inserted into each other according to the arrow direction 00506 device 26. The displacement of the cylinder 3 and piston 4 00507 takes place along the axis 25. Also lying on this 00508 axis the displacement of the closure element 8. In the insertion direction according to arrow 26 of the 00510 piston 4 into the cylinder 3, the 00511 closure part 8 is also inserted from outside the pump chamber 5 00512 into its outlet opening 6. The bellows is also arranged on the axis 25 9 to the side of the closure element 8 which is opposite the outlet opening 6 00514 and is supported as described at the beginning on the 00516 housing 14 of the pump. As a result of this teleskoparti00517 gene construction, the pump can be easily preassembled 00518 and is easily inserted into the supply line to the nozzle 10 00515. The bellows 9 will also be slightly put on the pin 23 when inserting 00520 due to its elasticity 00521. 00522 00523 FIGS. 5 and 6 show a further preferred embodiment

00524 management example of an exhaust valve in its Ge

00525 closed and in its open position. The shown there

00526 te piston 30 is corresponding to the housing 31

00527 Figs. 1 and 3 running pump set and

00528 forms a pump chamber 32 with a cylinder 33.

00529 By axially displacing the cylinder 33, cf. Fig.

00530 6, the pressure is built up in the piping chamber 32,

00531 as long as the closure element 34 in the Ge

00532 closed position according to FIG. 5.

00533

00534 The closure element 34 is plate-shaped,

00535 with a cylindrical sealing collar on the outer edge 35

00536 36 is formed. In the embodiment shown in FIG.

00537 closing position is the sealing collar 36 in

00538 peripheral sealing system within a second

00539 section 37 as a stepped bore with a first

00540 section 38 and the second section 37 trained

00541 outlet opening 39.

00542

00543 A pin 40 is the plate-shaped

00544 closure element 34 formed such that the

00545 Volume of the first section 38 of the outlet opening 39

00546 is almost completely filled out. With minor

00547 is radial play within the first section 38

00548 this completely over its axial extent

00549 fills. The volume of the outlet opening 39 is thus

00550 almost completely with the Vor¬ described above

00551 parts filled out.

00552

00553 On the side of the closure element 34, the Zap¬

00554 fen 40 a cross-sectional thickening 41. With this

00555 cross-section thickening 41 becomes the transition between

00556 the first section 38 and the second section 37

00557 of the outlet opening 39 sealed, which is the first 00558 section 38 widens outwards like a funnel,

00559 while the ring shoulder of the cross-sectional thickening 41

00560 is bevelled accordingly in opposite directions. This is

00561 a first seal of the outlet opening 39 and the

00562 PutTpenkammer 32 reached. 00563

00564 The second section 37 of the outlet opening 39 has

00565 a radial opening 42. This is particularly

00566 also advantageously sealed in that

00567 in the locked position the locking element

00568 ent 34 through a plate-shaped design the transverse

00569 completely cut out the second section 37

00570 fills. In the open position, cf. Fig.6, this is

00571 radial opening 42 free from the closure element 34

Given 00572 and is therefore a corresponding to the first

00573 embodiment a spray channel having a nozzle

00574 43 via the outlet opening 39 with the pump chamber 32

00575 in direct contact and can do that under pressure

00576 standing medium can be sprayed. The pressure build-up and

00577 pressure reduction is also in this embodiment

00578 due to the constructive design of the closure element

00579 influenced because the axial height of the sealing collar

00580 36 is greater than the axial length of the radial diameter

00581 break 42. As a result, a

00582 equally large initial clenching of the

00583 bellows 44 when pressure builds up the radial breakthrough

00584 42 closed comparatively long until the bellows

00585 44 then suddenly assumes its folded position

00586 and thus the radial breakthrough 42 for the pressure reduction

00587 is released. 00588

00589 During this folding movement, the bellows 44 becomes inside

00590 guided a tube 45, which here in one piece with the

00591 piston 30 is formed and which is on the housing

00592 se 31 supports the pump. Alternatively, the tube could be 00593 45 also through housing-fixed walls or in combination

00594 sections fixed to the housing or to the piston

00595. However, approaches would then be necessary which

00596 can cause a tightness problem and

00597 others a perfect sliding of the sealing collar

00598 could prevent. The inner dimensions of the tube

00599 45 are selected such that in the closed position

00600 the closure element 34 lies sealingly in the tube

00601 and thus the bellows 44 of the medium which

00602 then exits through the outlet opening 39, keeps clear.

00603

00604 Through such a design of the connection paths

00605 between a - and not shown here - nozzle and

00606 the outlet 39 of the pump _ »_ aι-πmer 32 that for

00607 the connection required volume significantly reduced. In

00608 Follow the existing there after a spraying process

00609 amount of the medium to be sprayed then occurs

00610, for example, hardly any more to drip. This

00611 at least not if in more detail how

00612 above and below in more detail

00613 described the suction effect of the room above the

00614 closure element is added.

00615

00616 This outlet valve in connection is particularly suitable

00617 with the described pump also for a spray

00618 head actuation. E.g. in the form of a finger pump. Hier¬

00619 is basically only a reversal of movement from

00620 pistons and cylinders required and training

00621 of a manually operated spray head on now to be moved

00622 end piston.

00623

00624 The embodiment of FIG. 7 ties in with the embodiment

00625 form of FIG. 2. Here, too, there are three different types

00626 che sections 20, 21 and 22 of the outlet opening to unter¬

00627 divorce. It is essential that in the third section 00628 inwardly projecting ribs 48 are formed, 00629 the inner surface 49 of which is approximately flush with an inner surface of the second section 21. The 00631 sealing lip 17, which, however, is cylindrical in this embodiment (but can also be 00633 in the shape of a trich00634 corresponding to the embodiment shown in FIG. 2) in the course of the 00635 opening process, is continued through these ribs, 00636 if the path to the spray channel 43 is already open. 00637 This results in a substantially wear-free 00638 operation. In a further advantageous embodiment, 00639 here is also provided that the sealing lip 17 has an opening cutout 00640 on one side, facing the spray channel. The opening cutout 50 is approximately 00642 adapted to the cross section of the spray channel 43. It is also important here that the spray channel 43 in 00644 has a cross section perpendicular to the plane of the drawing with an approximately 00645 semicircular cross section. 00646 00647 About 4 to 6 ribs 48 00648 can be formed distributed over the circumference. They are essentially limited in their height to the third section. 00650 otherwise has an outwardly opening profile 00652 which is circularly rounded in cross section 00651 as can be seen (with regard to the annular wall). In 00653, the extension of the sealing lip 17 in its 00654 axial length is provided such that a guide 00656 through the ribs 48 also remains in the opening position, as shown in FIG. 7. 00657 00658 In the exemplary embodiment in FIG. 8, the spring 00659 bellows 9 is replaced by a spiral spring 51. The Spiralfe00660 of FIG. 51 is characterized by a central area 52 00661, which is plate-shaped or annular. Starting from this central area 52 00663 two spring arms 53, 54 aligned in opposite directions, each spiraling 00664. The spring arms 00665 taper upwards or downwards (based on 00666 the drawing) in their spiral towards the 00667 central axis 25. The spring can be inserted as a single part 00668 or molded onto the closure 00669 element. In addition, only 00670 can be formed on one side, top or bottom, a spiral spring arm 53, 54 00671. 00672 00673 In the exemplary embodiment in FIG. 9, only 00674 is a cut-out, and in part schematically, a locking element with an injection-molded helical spring 55 which represents 0000675. The helical spring has approximately VA helical gears on 00677 and ends in a substantially flat end ring 56, which extends in an 00008 manner. The end ring is used for 00679 support on the pupil housing. 00680 00681 As can also be seen, the closure element has a 00682 upper recess 58 opening into space 57. The 00683 coil spring 55 originates from an edge region 59 of the 00684 recess 58. The closure element with the coil spring 55 integrally molded on 00685 is injection molded from a soft poly 00686 εtyrol plastic. 00687 00688 An outer diameter DA of the edge lip 17 (in its 00685 largest area) is chosen to be larger in manufacture 00690 than an inner diameter DI of the outlet opening in which the edge lip 17 slides. As already explained above 00692, the dimension Da is 7.1 mm and the dimension 00693 DI is 7 mm. As a result, the closure element or the edge lip 17 in 00695 the outlet opening is difficult to move, at least over a first 00696 path section. This supports effective pressure point formation ("precompression"). 00698 All features disclosed are essential to the invention. In

00699 the disclosure of the application is hereby also the

00700 disclosure content of the associated / attached priori

00701 full documents (copy of the pre-registration)

00702 was included, also for the purpose of characteristics of this

00703 documents in claims of the present application with

00704 to record.

Claims

00705 A n s r u c h e

00706

00707 1. exhaust valve with a closure element for Ver¬

00708 closing an outlet opening of a pressurizing valve

00709 ren chamber, in particular a pump chamber, which

00710 opens the outlet opening at a predeterminable pressure,

00711 characterized in that the closure element (8)

00712 linear between a closed position and an open position

00713 position is movable and that the movement in the open

00714 position against the force of a spring coil or one

00715 bellows (9).

00716

00717 2. exhaust valve according to the features of the preamble of

00718 claim 1 or in particular according thereto, thereby gekenn¬

00719 shows that the closure element (8) linear between

00720 a closed position and an open position

00721 bar and that the movement in the open position against

00722 the force of a plastic injection molding process

00723 th spring (51) takes place, the spring (51) starting

00724 from a central area (52) two in opposite directions

00725 aligns, each spring-shaped spring arms

00726 (53, 54).

00727

00728 3. exhaust valve according to one or more of the preceding

00729 claims or in particular according thereto, thereby

00730 characterized in that the central region (52) like a ring

00731 is formed.

00732

00733. Exhaust valve according to the features of the Oberbegri fes

00734 of claim 1 or in particular according thereto, thereby ge

00735 indicates that the closure element (8) linearly between

00736 rule a closed position and an open position

00737 movable and that the movement in the open position

00738 against the force of a plastic injection molding process 00739 produced coil spring (55), the Wen00740 del spring (55) having an upper end ring (56). 00741 00742 5. Pump, in particular for an atomizing discharge of 00743 liquid media from a storage container, with a 00744 00745 having an inlet valve and an outlet valve, characterized in that the Auslaßven00746 til (7) one in an outlet opening (6) of the pirp chamber 00747 (5) linearly guided, from a closed position against 00748 the force of a bellows (9) in an open position 00749 movable closure element. 3. outlet00750 valve according to the features of the preamble of An00751 claim 1 or in particular thereafter, characterized gekennzeich00752 net that the closure element (8) is linearly movable between a 00753 closed position and an open position and 00754 that the movement into the open position against the force 00755 one in Plastic injection molding helix 00756 spring (55) takes place, the helical spring (55) having a 00757 upper end ring (56). 00758 00759 6. Pump, according to claim 4 or in particular according to it, 00760 characterized in that the outlet valve (7) a 00762 in 00761 an outlet opening (6) of the pump chamber (5) linearly, from a closed position against the force 00763 one in the Kunstsoffεpritzverfahren produced spring 00764 (51) in an open position movable closure 00765 element, the spring (51) starting from 00766 a central region has two oppositely aligned, 00767 each spring-shaped spring arms. 00768 00769 7. Pump according to claim 5 or in particular according thereto, 00770 characterized in that the outlet valve (7) a 00772 linearly guided in 00771 an outlet opening (6) of the pump chamber (5), from a closed position against the force 00773 one made in the plastic injection molding process feather 00774 (55) slide element which can be moved into an open position

00775 ment, the spring (55) as a helical spring

00776 is formed.

00777

00778 8. Exhaust valve according to one or more of the preceding

00779 claims or in particular according thereto, thereby ge

00780 indicates that a compression spring force of the bellows

00781 (9) or the spring (51) or the spring (55) the Ver¬

00782 holding element (8) holds in the closed position.

00783

00784 9. Exhaust valve according to one or more of the preceding

00785 claims or in particular according thereto, gekennzeich¬

00786 net through one of the closure element (8) protruding

00787 cone (19), which in one to the Puι ^* penkarrrmer (5)

00788 subsequent first section (20) of the outlet opening

00789 (6) engages.

00790

00791 10. Exhaust valve according to one or more of the preceding

00792 eden claims or in particular according thereto, thereby gekenn¬

00793 records that the pin (40) the volume of the first

00794 section (38) of the outlet opening (39) almost completely

00795 dig fills out.

00796

00797 11. Exhaust valve according to one or more of the preceding

00798 claims or in particular according thereto, thereby ge ^¬

00799 indicates that the pin (40) on the side of the

00800 closure element (34) a cross-section thickening

00801 (41), which in the closed position

00802 sealing the first section (38) of the outlet opening (39)

00803 closes.

00804

00805 12. Exhaust valve according to one or more of the preceding

00806 claims or in particular according thereto, thereby ge

00807 indicates that the closure element (8) and 00808 bellows (9) and optionally the pin (19) are made in one piece from plastic. 00810 00811 13. Exhaust valve according to one or more of the preceding claims or in particular according thereto, characterized ge00813 in that the closure element (8) is plate-shaped 00814 with a radially outwardly projecting lip (17) 00815, which in the closed position in 00816 one sealing system within a second Ab00817 section (21) of the outlet opening (6), to which 00818 for the open position a third section (22) of the 00819 outlet opening (6) of expanded cross section adjoins 00820, at which the edge lip (17) with radial play 00821 is caught. 00822 00823 14. Exhaust valve according to one or more of the preceding claims or in particular according thereto, characterized 00825 in that the closure element (34) tellerför00826 mig with a cylindrical sealing collar (36) protruding from the outer edge (35), which is formed in 00828 closed position in a circumferential sealing 00829 system within a second section (37) of the 00830 outlet opening (39). 00831 00832 15. Exhaust valve according to one or more of the preceding claims or in particular according thereto, characterized 00834 in that the second section (37) has a 00835 radial opening (42) which, in the open position of the exhaust valve, of the closure element (34) 00837 released, connects a spray carial (43) to the pump chamber 00838 (32) via the outlet opening (39). 00839 00840 16. Exhaust valve according to one or more of the preceding00841. Claims or in particular according thereto, thereby 00842 indicates that the spray channel (43) is immediately on

00843 connects the radial opening (42).

00844

00845 17. Exhaust valve according to one or more of the preceding

00846 claims or in particular according thereto, thereby

00847 characterized in that the height of the cylindrical sealing

00848 collar (36) greater than the axial length of the radial

00849 breakthrough (42).

00850

00851 18. Exhaust valve according to one or more of the preceding

00852 claims or in particular according thereto, thereby

00853 characterized in that the bellows (44) within a

00854 tube (45) is guided.

00855

00856 19. Exhaust valve according to one or more of the preceding

00857 claims or in particular according thereto, thereby

00858 characterized in that the tube (45) in extension of the

00859 second section (37) of the outlet opening (39)

Is 00860 and that the closure element (34) in its

00861 open position in the tube (45) sealingly.

00862

00863 20. Exhaust valve according to one or more of the preceding

00864 claims or in particular according thereto, thereby

00865 characterized in that the tube (45) integrally with the

00866 piston (30) and that the tube (45),

00867 first and second section (38, 39) of the outlet opening

00868 (39) through a centrally penetrating the piston (30)

00869 stepped bore is formed.

00870

00871 2 ₁ . Exhaust valve according to one or more of the preceding

00872 claims or in particular according thereto, thereby

00873 characterized that the third section inside

00874 projecting ribs (48), the inner surface

00875 (49) approximately flush with an inner surface of the second

00876 section (21) are formed.

00877 22. Exhaust valve according to one or more of the preceding

00878 claims or in particular according thereto, thereby

00879 characterized in that the sealing lip (17) on one side

00880 gene, the spray channel (43) facing opening cutout

00881 (50).

00882

00883 23. Exhaust valve according to one or more of the preceding

00884 claims or in particular according thereto, thereby

00885 characterized in that the opening cutout (50) approximately

00886 a cross section of the spray channel (43) is adapted.

00887

00888 24 pump according to claim 3, in particular with a

00889 or menrere of the foregoing features

00890 outlet valve or in particular afterwards, in the manual operation

00891 tigt the volume of the pump chamber for a pressure build-up

00892 is reducible, characterized in that the inlet

00893 valve (11) and the outlet valve (7) opposite each other

00894 are arranged gend.

00895

00896 25. Pump according to one or more of the preceding

00897 Anεprucne or in particular after, with one another

00898 mated, counter-core on the insertion axis

00899 sliding piston and cylinder, which the pump chamber

00900 mer enclose, characterized in that on the

00901 insertion axis (25) the outlet opening (6) m from the

00902 Zylmαer (3) circumferential piston (4) is arranged and

00903 that the closure element (8) into the outlet opening (6)

00904 puπ enκat-3meraußenseιtιg is used, which about

00905 on the opposite of the outlet opening (6)

00906 side bellows (9) fixed to the pump housing

00907 is trimmed.