DE2649007A1 - MANUAL LIQUID DISPENSER - Google Patents

Description

Priority October 29, 1975 in USA, Serial No. 626 819

In the past, it was through release levers or triggers actuated dispensing pumps for liquid containers have been proposed, particularly one of which in practice has found widespread use which is disclosed in U.S. Patent 3,061,202 (Tracy B. Tyler). However, this type of pump is generally complex and has many parts that are relatively expensive to manufacture and / or assemble. Additionally are some of the items also complex and expensive to manufacture and / or arrange.

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Postal check: Frankfurt / Main 6763-602 Bank: Dresdner Bank AG, Wiesbaden, account no. 276807

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Other devices are also known which attempted to overcome the problem of costly manufacture, mentioned in the aforementioned U.S. Patent 3,061,202 are, in particular the US patent 3 7 ^ -9 290 (Lewis A. Micallef) acts. In this patent describes a spray device with a trigger lever, which has a deformable, tubular, internally supported Has body which can be claimed under pressure on its one side wall by a release lever mechanism is to reduce its volume and dispense liquid drawn into the volume from a container. The hollow one tubular body has an open-bottomed in-line inlet port and an open top outlet port including one Inlet and outlet valve devices, the former in the open bottom ^ the latter a concentric edge on the Körpez * is, with partial engagement with the inner surface of the spray body, which cooperates to form the valve device. The Micallef device uses a release lever device for bending a side wall of the tubular body, thereby causing the inlet valve to swell and the outlet valve to open for the draining liquid. The amount of liquid that is dispensed with a single actuation of the trigger lever is largely reduced the amount of sidewall flexibility is determined accordingly the space available for its displacement,

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The Micallef device is an example of a hand operated one and relatively low-cost uricomplex donors.

Furthermore, in US Pat. No. 3,575,318 (θ. Kunz) is a Liquid ejector, namely a toy water pistol described. According to this patent specification, an e; t ~ Removable, liquid-containing, foldable chamber in your Gun body entered in contact with a trigger-operated Kolljen. When the trigger is pulled, The plunger squeezes the chamber and injects the contained Liquid; through a pressurized nozzle at the end of the chamber opposite the piston. Tvenn squirted out all the liquid is, the chamber is taken out, with liquid reloaded from a tap and then reinstalled in the gun.

U.S. Patent 3,022,779 (E. Benkoe) describes one "Mehrschuß" - ¥ water pistol with a water containing one, collapsible A container that is placed in a breech block of the pistol. The liquid in the container is drained from a trigger assembly that acts against the container, squeezing the same and squirting out of liquid through a nozzle. A device 5 is also described in which the projectile munition in the nozzle from the Gun di23? Ch pressure of the liquid in the collapsible

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Container is "shot out". Both in this one Structures described in the patent, the container is • pre-filled from a feed source, which then before is inserted into the gun during operation. A return spring is added to the trigger assembly after Squirt out the liquid and put the refilled cartridge or container back into its operating position .

Other types of spray devices are also known which are remembered when liquid is run out to be sprayed into a container. For example, there are known spray devices which can be actuated with a finger with a piston and the like known and widely used. The state of the art is well developed, many manual operation dispensers being proposed are and are made.

The object of the invention is the design and construction of an extremely inexpensive one that can be actuated with a release lever Hand-operated dispenser with a unitary construction pump container where the dispenser has relatively few parts, each of which is easy and inexpensive to manufacture and assemble individually and can be manufactured from readily available materials is.

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According to a feature of the invention, in the device of the aforementioned type, the liquid from one becomes a liquid feed holding container issued on which the device is monüert and in which an outlet or Drain valve as an integral part of the unit pump container is provided.

According to a further feature of the invention, there are the components the device almost all made of inexpensive plastic materials, preferably elastomeric thermoplastics, such as polyolefin, polyurethane, polyvinyl chloride, natural and Synthetic rubber and the like.

It is also advantageous according to the invention, a hand-operated To provide dispensing apparatus of the type mentioned above, in which the unit pump container is in a single part multiple capabilities combined to perform the functions of a piston, fluid chamber, return spring and valve perform.

Other advantages, features and uses of the present Invention emerge from the following description in conjunction with the drawings.

Show it:

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Figure 1 is a vertical cross-sectional view of the dispenser according to the invention before actuation,

Fig. 2 is a view similar to Fig. 1 after a compression load has been applied to the pump container according to the invention,

3 shows a sectional view of the associated valves according to FIG 1 and 2 according to the invention on an enlarged scale and

Figure h is a vertical sectional view of another embodiment of the invention.

In particular, when the construction of the presently illustrated preferred embodiment of the invention is described With regard to FIGS. 1 to 3, a dispenser 10 is provided which is secured by a closure cap 12 on the neck of the container 11 is attached to the latter by unscrewing. The dispenser 10 has a component containing Body 13 »a release lever or trigger 14 with a Extension 16 on the trigger by a moving plastic joint 15 is attached. A hollow space 19 in the container 13 receives a hollow, resilient, collapsible pump container 20 of unitary blow molded construction, one preferred form are the elastomeric compressible bellows shown. The tank pump 20 has flexible walls or ribs 21, include a variable volume pump chamber 22, and the pump 20 is on an extension i6 in one with a platform provided with a recess or a piston 23

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same held. The chamber 22 has a closed bottom end 22a and an upper open end 22b in one radially extending, conically widened end 29 of the container 20.

The pump or bellows container 20 or. ^r . the conically widened end part 29, which has the open upper part 22b, sealingly receives a conically inwardly tapering projection 2.h of the body 13 on a sealing surface or a valve seat 25a of an outlet valve 25. The flared end 29 has a one-piece rib or lip with a movable valve body 26 which, during operation, cooperates with the valve seat 25a to form an outlet valve 25. In Fig; 3, the outlet / alve 25 is shown in the open or Flüssigkeitsentleerungssteilung, and the liquid flows according to the arrows through the valve, wherein the pump reservoir has been together close presses 20 and folded by the folding of its flexible Found corrugations 21, thereby causing the flared end 29 will move forward a certain distance and separate the valve body 26 from the seat 25a to open the exhaust valve 25.

In the tapered projection 24 is a central one Passage is formed which opens into an inlet opening 27 in the open upper side 22b of the chamber 22. Upstream from the latter an inlet valve 28 with a valve ball 28a and an inlet valve seat 28b through an annular, radially extending

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extending rib or web 27a is held in the inlet opening 27. An inlet line 17 arranged at an angle connects the chamber 22 via valve 28 with a liquid suction or immersion tube 18 which is held in a body or base insert 38 and from this in the container 11 depends into it.

The foldable container pump or the! -Compressible bellows 20 is in the body 13 in a circumferential groove or recess 29a by means of a cylindrical, pressure-fitted retaining clamp 30 held in the hollow space 19, which with a one-piece annular collar or clamping ring 31 on the pump container or the bellows 20 is engaged.

A drain line J2 is connected via the outlet valve 25 to the open top 22b, takes liquid pumped from the chamber 20 and leads the same to a drain nozzle 331 where the liquid is ejected or, if desired, dispensed as a spray.

A venting device for the container 11 is also provided in the dispenser 10 in order to ensure pressure equalization therein. which is a resilient disc vent or ring seal 39 of generally frustoconical shape which is removable in the cap 12 between the Top of the container 11 and the flange 37 of the body

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or base insert 38 is arranged. The vent disc 39 »which can be made of resilient material, such as natural or synthetic rubber, polyethylene, polypropylene or any other material that is capable of maintaining its general shape and resilience has a central one Opening with a certain undersize with respect to the outside of a pipe holder or support body 36 of the insert 38, which it is assigned as a check valve, air can flow into the container 11 from above to equalize the pressure therein by replacing the liquid being dispensed while preventing liquid leakage from below is. In operation, air flows through a slot 41 in the top of the cap 12 and into a passage 40 the ring seal or the vent disc 39 and in the Container 11 in, because the ventilation disc 39 by bending away from the surface of the support body 36 for the outside air creates the possibility of entering the container 11 and replacing the liquid that has been withdrawn therefrom is. On the other hand, the liquid in the container 11 is prevented from leaking out because of the liquid pressure on the Container side of the vent disk 39 causes this to to close the bracket 36 around more tightly.

In Fig. K , another embodiment of the present invention is shown in which a dispenser 110 has a multi-part body 113 and a release lever or trigger with a plastic hinge 115 attached to it.

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has extension 116. A cavity 119 in the body 113 contains a unit pump or bellows reservoir 120 with elastic Walls or ribs or depressions 121, which one Include pump chamber 122. Chamber 122 has one closed bottom 122a and an open top 122b and is supported on a platform 123.

The pump or bellows container 120 has an enlarged conical shape End 129 »which has an open top 122b and in an expandable flexible pool or collar 43 flows out. The flange 43 stands in a recess 44 Body 113 in engagement, which is formed therein by a tapered projection 124. The tapered protrusion 124 extends extends into the flared end 129, and part of its outer peripheral surface 125a provides a seal for a valve 125 when it is with a valve body 126 at end 129 is engaged.

The tapered part 124 has a central passage which opens into an inlet opening 127 at the entrance to the chamber 122. An inlet valve 128 is held in the central passage of the projection 124 between a rib or a web 127a in the entrance to the chamber 122 and has a shut-off ball 128a and a valve seat 128b. An inlet line 117 arranged under an ¥ angle creates the connection between the chamber 122 and a hanging dip tube 118 and a liquid container (not shown ).

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as in the above-described embodiment according to FIG. 1.

The bellows 120 is in the body 113 i ^s a recess Odei / a groove 129a in the cavity 119 retained by a clamp or a snap ring 130 which angsklemmrin with a radially extending Umf ". 131 on the bellows pump 120 engages.

An emptying line 132 for carrying liquid from the chamber 122 extends from the outlet valve 125 to a drain nozzle (not shown).

During operation of the device according to the invention, the dispenser 10 is attached to the container 11 by screwing the closure cap 12 onto the quirks or neck of the container 11. An operator holds the assembled dispenser 10 in his hand, his fingers grip the trigger 14, with the closure cap in the palm of the hand and the container 11 extending under the hand. The trigger 14 is actuated by squeezing or squeezing the trigger extension 16 and the platform 23 provided with the recess on the joint 15 against the bottom 22a of the bellows pump 20, whereby a compression load is applied to the bellows. The bellows pump 20 is then folded together characterized in that, as shown, the flexible ¥ andrippen in Figo 2 or white = lnngen 21 fold _o Once the Balgbehälterpumpe 20 coincides ,, niiiimt the volume in the chamber 22 AFO ₉ and pressure is

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generated. Initially there is only air in chamber 22, and its increase in pressure presses the inlet shut-off valve ball 28a against the seat 28b, closing the valve 28. At the same time the outlet valve 25 opens as the pump container 20 experiences a reduction in length due to compression when both ends are longitudinally against the stationary Move the clamping ring 21, the flared end 29 bends downwards over the projection 24 until the valve body 26 and the valve seat 25a no longer remain in contact can. The air in the chamber 22 then flows through the open valve 25 to the outlet line 32 and is injected through the nozzle 33. After releasing the trigger 14 causes the "memory" (memory) of the elastomeric flexible wall ribs 21 of the bellows 20, the latter for expansion, wherein it is in its original, not folded up Shape extended, while at the same time the trigger 14 in its original position shown in FIG returns and is on a connecting pin 21a im Body 13 rotates. This return leads to a partial vacuum which develops in chamber 22, and that Outlet valve 25 is closed, inlet valve 28 is closed opened, whereby liquid from the container 11 through the dip tube 18, the line 17, the open inlet valve 28 and the inlet port 27 is drawn into the chamber 22 to

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is caused, wherein the chamber 22 is filled with an amount of liquid to be dispensed.

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With the next and following compression by means of Withdrawal 14, the liquid in chamber 22 is durda To pressurize the compression, collapsing the bellows pump, lower the inlet shut-off ball 28a Closing the inlet valve 28 presses against the seat 28b, the outlet valve 25 opens by the bending displacement of the Bellows 20, as described above, and liquid can flow into evacuation line 32 and output from nozzle 33 will.

¥ ¥ during the pumping and dispensing activity described above of the dispenser 10, the liquid level in the container 11 is lowered when liquid is dispensed or sprayed. This creates a partial vacuum in the container 11, unless it is provided for a vent. According to the invention, the venting takes place by means of a flexible Ventilation disc or ring seal 39 atmospheric pressure, which acts on the ring seal 39, causes it to bend downward away from the support 36. Air flows into passage 40 around the threaded one Cap 12 around and around threaded container 11 on top and into it through the opening between the bracket or support 36 and the vent valve 39 If there were no ventilation provided, i.e. if atmospheric pressure were not maintained in the container 11, the container 11 could tend to collapse or collapse. fold up and pump performance would be affected.

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pregnant. However, this possibility is prevented by means of the vent valve or the disk 39 in the cap 12. In addition, the vent disc or ring seal 39, which bends down to allow air to pass into the container, also provides a tight seal against liquid leakage out of the container 11 as any liquid from the container 11 acts on the underside of the ring seal 39 and presses it against the bracket or support, the container 11 being tightly sealed against leakage.

K to operate the dispenser 110 shown in FIG., The trigger 114 is moved rightward, and the compressible bellows 120 is initially compressed to "closure of the valve 128, the check ball is pressed 128a against seat 128b. In the chamber 122 trapped Air receives an increased pressure and causes the flange 43 to expand radially and to open the outlet valve 25 by causing the valve body 126 to separate from the seat or sealing surface 125. The trigger 114 is then relieved, the bellows 120 expands and elongates under its own memory to its original fully elongated shape. This elongation creates a suction or partial vacuum in the chamber 122, whereby the valve body 126 is returned to the surface 125a with the closure of the outlet valve 125. At the same time, the shut-off ball becomes 128a lifted from the seat, leaves the seat 128b, the inlet valve 128 opens,

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and liquid is drawn up from container 11 through dip tube 118 and inlet conduit 117 into chamber 122 upward. The next compression stroke on the bellows 120 by movement of the pull 114 closes the valve 128 and the splash kj expands to open the valve 125 and liquid in the chamber 122 flows into the exit conduit 132 to be dispensed from the sprayer 110. Subsequent actuations of the trigger 114 result in alternating suction and vacuum applications in the chamber 120, and liquid can be dispensed in a steady stream if desired.

There are improvements here compared to known liquid dispensing devices described as well as an integral, collapsible he container pumping mechanism and valve means for this, preferably in the form of a bellows pump. The dispensing device and in particular the pump container is preferably made of thermoplastic elastomer materials and molding resins. The bellows has flexible ¥ änc "e or ¥ ellings or corrugations and can be repeatedly bent and bent back, with little or no loss of the elastic memory is given, whereby in a single part the activities of a piston, a Fluid chamber, a return spring and a valve are combined. The bellows container pump can be described in the Designs constructed and manufactured from thermoplastic elastomeric materials by any known method

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be provided, a particularly preferred process being the known blow molding process. It has been found that As a result, such a pump ventilates the tensile strength of a Feather can double, the same being folded up or collapse when under compression pressure from the closed bottom end is claimed and thereafter as a result his own plastic memory into its original Shape returns when the stress or strain is removed. Any known plastics can can be used, polyolefin, in particular polyethylene, being preferred. Another suitable material is a Body of a family of polyolefins, thermoplastics, which are available and sold under the TPR trademark in the United States of America. Other materials, to which there is no restriction, include polypropylene, polyurethane, polyester elastomer, Polyvinyl chloride and natural and synthetic rubber. In some cases it is believed that the inventive device May be made of metal or a combination of metal and plastic, and such combinations of materials are for the use intended here. Other materials and combinations will be apparent to those skilled in the art in the practice of this invention common.

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Claims (10)

Claims [1 J liquid dispenser "with manual operation and with one Variable volume pump chamber, lines for delivering the liquid to the pump chamber and from diesel ', with at least one non-return valve to regulate the flow of liquid, a mechanism for changing the volume of the pump chamber and for moving the pump from a normal, non-pumping position to a pump position and with a drainage opening for connection to the Outlet line to output dox · pumped by the pump Liquid, characterized that a hollow space (19) in one component, pointing body (13) is arranged and that in the hollow space (19) a bellows pump (20) with variable volume is provided. 2. Dispenser according to claim 1, daduz-ch characterized in that the bellows pump (2θ) has a sealed end (22a), fluted or has corrugated side walls (21) and an open end (22b). 3. Dispenser according to claim 1, characterized in that the body (13, 2k ) is in engagement with the open end (22b) of the bellows (20). - 18 - 709819/0932 4. dispenser nacli claim 1, characterized in that the body (13) has a protrusion (24) that extends extends a short distance into the hollow space (19) and that the bellows pump (20) is engaged on this projection (24). 5. Dispenser according to claim 1, characterized in that the bellows pump (20) has a sealed end (28a, b), corrugated or corrugated side walls (21) and a has an open end (22b) which ends in a conically flared part (29), and that the body (i3) has a projection (24) which extends over a short distance into the hollow space (19) and is tapered so that it is to the the flared part (29) of the pump (20) fits. 6. Dispenser according to claim 5> characterized in that an inwardly projecting lip (26) at the open End (22b) of the bellows pump (20) is formed and the lip (26) normally with the projection (24) in the Body (13) is engaged to form a valve (25) therebetween. 7. Dispenser according to claim 5> characterized in that the flared part (29) of the open end (22b) of the pump (20) normally with the projection (24, 25a) - 19 - 709819/0932 264900? in the body (13) with the formation of a valve (25) therebetween is engaged. 8. donation ^ according to claim k, characterized. That the projection (24) on the body (13) has a check valve (28). 9. Dispenser according to claim 1, characterized in that the mechanism for Verändexmng the volume of the pump chamber (22) has a piston (16) which is attached to the bellows pump (20) and in the hollow space (19) for compression the bellows pump (2θ) is arranged to be slidable. 10. Dispenser according to claim 1, characterized in that the bellows pump (20) is fixed in the hollow space (19) by an annular clamping ring (31) which is arranged on the outside of the bellows pump (20), and by a retaining clamp (3θ )> which _{is inserted into the hollow space (19) in such a} way that it engages with the clamping ring (31) and secures the bellows pump (2O) in the hollow space (19), 709 819/0932