EP1474023A1 - Dosing pump - Google Patents
Dosing pumpInfo
- Publication number
- EP1474023A1 EP1474023A1 EP03700796A EP03700796A EP1474023A1 EP 1474023 A1 EP1474023 A1 EP 1474023A1 EP 03700796 A EP03700796 A EP 03700796A EP 03700796 A EP03700796 A EP 03700796A EP 1474023 A1 EP1474023 A1 EP 1474023A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slide
- dispenser according
- soap
- pump
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K5/00—Holders or dispensers for soap, toothpaste, or the like
- A47K5/06—Dispensers for soap
- A47K5/12—Dispensers for soap for liquid or pasty soap
- A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
- A47K5/1204—Dispensers for soap for liquid or pasty soap dispensing dosed volume by means of a rigid dispensing chamber and pistons
Definitions
- the present invention relates to a metering pump for liquid or cream-like soaps according to the preamble of claim 1.
- Known soap dispensers are based on a dosage of the soap solution, by a pump, which has a slide-like piston and doses the soap in portions from an overhead container, via an intermediate container, and hand wash releases.
- the slide which has a cylindrical cross section, is provided on one long side with a circumferential groove and a sealing ring inserted therein, and is guided in a cylinder closed on one end side.
- Coil spring presses the slide against the actuating direction up to a stop, as a result of which the cylinder space thus formed fills with soap solution via a connection hole to the intermediate container. If the slider is now moved by hand against the spring force using its actuating button, the soap solution in the slider flows through a longitudinal hole, via a groove that is open at the bottom and an outflow channel in the cylinder onto a palm that holds the soap (the hand offered).
- the spring pushes the slide back into the starting position, which first causes an undesirable inflow of air through the outflow channel and only then a desired inflow of soap solution into the cylinder space.
- the cylinder room is thus filled with soap solution and air; the subsequent next actuation leads to non-reproducible doses due to foam formation and foam compressions depending on the actuation speed;
- the dispenser also tends to drip.
- the metering pump should also be able to be equipped with an electric drive without major design changes and should also be suitable for contactless battery operation.
- the medium is dispensed as in any other slide pump; the sealing element lies on the rear shoulder of the annular groove during the working stroke and seals the slide in a conventional manner with respect to the cylinder space.
- the first sealing element is during the entire dosing process, i.e. tight during the return stroke (filling process) and the working stroke (discharge).
- a spring in the outflow channel that acts on the check valve only has to overcome the static pressure of the liquid and the mass of the valve body (plastic ball). Due to the hardly existing negative pressure during the filling process, the valve body is only slightly loaded, which its service life and thus the operational safety increased considerably.
- a dispenser realized according to the teaching of claim 1 shows a higher dosing accuracy than conventional dosing pumps, since no foaming takes place in the cylinder space. Due to the lower fluid dynamic friction, it also requires less energy to operate.This has a particularly positive effect on battery-powered, contactless dispensers.
- peripheral grooves in the front of the slide which form a connection to the dosing chamber with the ring-shaped second groove, can also improve the pressure compensation on the slide.
- a concave recess on the front of the slide prevents it from striking the bottom of the cylinder chamber; the medium displaced into this recess acts as a hydraulic spring and reduces the force to be applied for the return stroke. It is particularly advantageous after very long interruptions in operation if the check valve is detachably arranged at the end of the outflow channel and its valve cap also contains the outlet nozzle of the outflow channel. This allows easy cleaning and, if necessary, flushing the entire device with water.
- the slide preferably contains a blind hole-like rear center hole with a clutch spring (leaf spring). This makes coupling pins easy to connect, which, among other things. allows the use of the same slide in different dispensers with differently designed drives.
- this O-ring which rolls with the slide movement, loosens axially from its seat even after the dispenser has been out of operation for a long time, so that the notoriously known sticking is eliminated and soap solution can be dispensed again at any time.
- the front groove has proven itself, groove widths larger than 1.5 times the diameter of the O-ring.
- a flow-optimized dispenser with minimal power requirements guides the soap solution through a hole that protrudes from the end of the valve in the idle state and in the area of the second annular groove. - This causes the metering pump to be automatically vented.
- FIG. 2 shows a sectional view through a soap storage container, an intermediate container and a metering pump connected to it,
- FIG. 3 is a perspective view of the slide of the metering pump with inserted coupling pin
- FIG. 4 is a frontal plan view of the slide in FIG. 3,
- Fig. 5 shows a longitudinal section through the arrangement of Fig. 3, through the center and
- Fig. 6 shows a further longitudinal section through the arrangement of Fig. 3, but in a section upstream of Fig. 5.
- FIG 1 denotes a soap dispenser, which in the usual way has a housing 2 and from whose underside an annular actuating lever 3 protrudes.
- a soap outlet 4 is located in front of the actuating lever 3.
- a transparent viewing window 5 is embedded in the front of the housing 2, behind which there is a color-coded one Level indicator 6 is located. The direction of actuation PH is shown by an arrow.
- FIG. 2 shows a soap storage container 7 with an attached intermediate container 8, which has cover-shaped cover surfaces 8 '.
- a push-on and push-on part 9 protrudes, which accommodates a soap bottle V arranged overhead.
- a soap solution passage 10 In the lower area of part 9 there is a soap solution passage 10, whereby the level N of the soap solution S in the container 7 is set when the soap bottle V is full.
- the necessary connection to the outside air is created by a compensating hole 40 in the cover surface 8 '.
- FIG. 2 On the side shown in FIG. 2 there is a channel 11, which forms the lateral guide for a fill level indicator 6, not shown here. Furthermore, a centering surface 12 is visible in this channel 11, which projects upwards and forms the central guide for the fill level indicator 6, FIG. 1.
- a cylindrical soap solution supply 13 is provided, which opens with a central bore 14 in the cylinder of a metering pump 15.
- the interior of the pump 15 has a cylindrical metering space 17, which in turn is connected to a soap outlet 16 and which is closed off by a valve ball 25 mounted in a valve seat 26.
- the valve ball 25 is acted upon by a spring 27 which is centered in a pressed-on valve cap 24 and which has a central outlet nozzle 28.
- a vertically arranged reinforcing rib 37 is located in the axis of symmetry of the arrangement in FIG. 2; likewise a cylindrical support 39 for the longitudinal guidance of the drive and coupling means.
- the slide 18 contains a bore 36 and has a central, concave recess 23 on its end face St.
- a tubular coupling pin 29 is inserted into the bore 36, and a coupling spring 30 arranged at the end of the slide 18 engages in the opposite longitudinal grooves 30 'thereof.
- This spring 30 serves at the same time as an end stop for the return stroke RH and prevents inadvertent movement out of the cylinder space 17.
- an actuating piece 31 is inserted in its bore 41, which has a lateral recesses 32 and 33 and a coupling nose 38; the coupling nose 38 is engaged in the recess 33.
- This coupling pin 29 is for a manual hurry operating lever - not shown - provided and is designed according to the respective drive means and adapted to this; the same applies to the coupling piece 29. This allows a single slide 18 to be used for any type of mechanical drive.
- peripheral grooves 34 and 35 are let into the end face St of the slide 18, which are guided up to the rear wall of the annular groove 21.
- various cutouts 18 ' can be seen on the slide 18, which are production-related and also lead to material savings.
- FIG. 4 shows the upper grooves 34 arranged symmetrically to the center and the similar lower grooves 35; cut lines A - A and B - B are also shown.
- FIG. 5 and FIG. 6 show the corresponding longitudinal sections A - A and B - B, the section B - B, FIG. 5, being led through the longitudinal axis of the arrangement formed by slide 18 and coupling pin 29.
- the functionally necessary annular gap in the widened annular groove 21 is designated RS.
- the dosing pump according to FIG. 2 shows surprising effects:
- the O-ring 22 rolls onto the front shoulder of the annular groove 21.
- the soap solution can flow in via the annular gap RS formed in this way and the peripheral grooves 34 and 35 (FIG. 3), whereby through the adjusting vacuum, the valve ball 25 is sealingly in its valve seat 26.
- the pressure equalization established via the annular groove 21 and the grooves 34 and 35 prevents that in others. Slider pumps foam and reduces the necessary actuating force considerably.
- the recess 23 recessed in the end face of the slide 18 also has a favorable effect, since it acts as a kind of hydraulic spring, since on the one hand it dampens the slide 18 in the pumping stroke PH when it hits the bottom of the metering chamber 17 and on the other - at a minimum enclosed soap solution - the breakaway torque of the slide 18 on the return stroke RH is reduced.
- the pump housing can at the same time be integrally formed with the container part, as the sectional view in FIG. 2 shows impressively.
- the pump housing can at the same time be integrally formed with the container part, as the sectional view in FIG. 2 shows impressively.
- the subject of the invention is of course not limited to soap dispensers; it can also be used, for example, for dosing pumps in foam dispensers.
- the actuation force reduced by the subject matter of the invention offers this for installation in battery-powered devices.
- the uninterrupted service life of non-contact soap and foam dispensers can be extended considerably with the use of weaker drives, which increases the operational readiness of foam and soap dispensers installed there in particular in irregularly used public washrooms and at the same time reduces their maintenance costs.
- the entire arrangement can be produced very economically by known die-casting processes using inexpensive polymer materials.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Medicines Containing Plant Substances (AREA)
- Vending Machines For Individual Products (AREA)
- Peptides Or Proteins (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03700796A EP1474023B1 (en) | 2002-02-12 | 2003-02-07 | Dosing pump |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02405102 | 2002-02-12 | ||
EP02405102A EP1334683A1 (en) | 2002-02-12 | 2002-02-12 | Dosing pump |
EP03700796A EP1474023B1 (en) | 2002-02-12 | 2003-02-07 | Dosing pump |
PCT/CH2003/000095 WO2003068040A1 (en) | 2002-02-12 | 2003-02-07 | Dosing pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1474023A1 true EP1474023A1 (en) | 2004-11-10 |
EP1474023B1 EP1474023B1 (en) | 2005-07-20 |
Family
ID=27589200
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02405102A Withdrawn EP1334683A1 (en) | 2002-02-12 | 2002-02-12 | Dosing pump |
EP03700796A Expired - Lifetime EP1474023B1 (en) | 2002-02-12 | 2003-02-07 | Dosing pump |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02405102A Withdrawn EP1334683A1 (en) | 2002-02-12 | 2002-02-12 | Dosing pump |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP1334683A1 (en) |
AT (1) | ATE299662T1 (en) |
AU (1) | AU2003202398A1 (en) |
DE (1) | DE50300816D1 (en) |
WO (1) | WO2003068040A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7780039B2 (en) | 2006-04-28 | 2010-08-24 | Buckeye International, Inc. | Soap dispensing pump head with vacuum applying drip guard member |
USD742137S1 (en) | 2013-03-15 | 2015-11-03 | Buckeye International, Inc. | Dispenser for dispensing cleaning solutions |
USD784726S1 (en) | 2014-12-23 | 2017-04-25 | Buckeye International, Inc. | Dispenser for dispensing cleaning solutions |
USD773849S1 (en) | 2015-03-13 | 2016-12-13 | Buckeye International, Inc. | Dispenser for dispensing a cleaning solution |
USD795608S1 (en) | 2015-10-12 | 2017-08-29 | Buckeye International, Inc. | Dispenser for dispensing cleaning solutions, a cover piece for a dispenser for dispensing cleaning solutions, and a portion of a dispenser for dispensing cleaning solutions |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3250438A (en) * | 1964-06-12 | 1966-05-10 | G H Packwood Mfg Company | Fluent material dispenser with bottletype material container |
FR2206493B1 (en) | 1972-11-16 | 1975-01-03 | Broilliard Bernard | |
DE3508986A1 (en) * | 1984-03-16 | 1985-09-19 | GAT Grubenausbau GmbH, 5840 Schwerte | Pressure relief valve |
EP1118389A1 (en) * | 2000-01-19 | 2001-07-25 | Cws International Ag | Method and device for controled foam dispensing |
-
2002
- 2002-02-12 EP EP02405102A patent/EP1334683A1/en not_active Withdrawn
-
2003
- 2003-02-07 DE DE50300816T patent/DE50300816D1/en not_active Expired - Lifetime
- 2003-02-07 EP EP03700796A patent/EP1474023B1/en not_active Expired - Lifetime
- 2003-02-07 AT AT03700796T patent/ATE299662T1/en active
- 2003-02-07 AU AU2003202398A patent/AU2003202398A1/en not_active Abandoned
- 2003-02-07 WO PCT/CH2003/000095 patent/WO2003068040A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03068040A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003068040A1 (en) | 2003-08-21 |
EP1474023B1 (en) | 2005-07-20 |
AU2003202398A1 (en) | 2003-09-04 |
ATE299662T1 (en) | 2005-08-15 |
DE50300816D1 (en) | 2005-08-25 |
EP1334683A1 (en) | 2003-08-13 |
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