EP3538274B1 - Fluidabgabeeinheit und handdosiervorrichtung mit wenigstens einer fluidabgabeeinheit - Google Patents

Fluidabgabeeinheit und handdosiervorrichtung mit wenigstens einer fluidabgabeeinheit Download PDF

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Publication number
EP3538274B1
EP3538274B1 EP17784547.6A EP17784547A EP3538274B1 EP 3538274 B1 EP3538274 B1 EP 3538274B1 EP 17784547 A EP17784547 A EP 17784547A EP 3538274 B1 EP3538274 B1 EP 3538274B1
Authority
EP
European Patent Office
Prior art keywords
dispensing unit
fluid dispensing
head part
fluid
covering cap
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.)
Active
Application number
EP17784547.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3538274A1 (de
Inventor
Philip DÖBELE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IKA Werke GmbH and Co KG
Original Assignee
IKA Werke GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IKA Werke GmbH and Co KG filed Critical IKA Werke GmbH and Co KG
Publication of EP3538274A1 publication Critical patent/EP3538274A1/de
Application granted granted Critical
Publication of EP3538274B1 publication Critical patent/EP3538274B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/02—Adapting objects or devices to another
    • B01L2200/028—Modular arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/08—Ergonomic or safety aspects of handling devices
    • B01L2200/087—Ergonomic aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B01L2300/042—Caps; Plugs

Definitions

  • the invention relates to a fluid dispensing unit for a hand-held metering device, in particular for a pipette, with a receiving space in which a displacement means is displaceable in order to receive or dispense a fluid, in particular a liquid, with the fluid dispensing unit, with a shaft and with a head part, wherein the The receiving space is connected via a dispensing channel formed in the shaft to a dispensing opening formed at a free end of the shaft, the head part being arranged at a head end of the fluid dispensing unit opposite the free end of the shaft and the head part having a cover cap that can be removed from the head part the at least one element of the fluid delivery unit arranged in the head part can be covered or covered.
  • a measuring tube for medicine drops which has a piston which is axially movably mounted in a glass tube which is pulled out towards the tip and provided with a closure cap and a graduation mark.
  • the invention also relates to a hand-held dosing device, in particular a pipette, with a base body and with at least one fluid dispensing unit, the base body comprising displacement means for receiving and dispensing a fluid, in particular a liquid, with the fluid dispensing unit and actuation means for operating the displacement means, and wherein the base body and at least one Fluid delivery unit are detachably connected to one another.
  • a hand-held dosing device in particular a pipette
  • the base body comprising displacement means for receiving and dispensing a fluid, in particular a liquid, with the fluid dispensing unit and actuation means for operating the displacement means, and wherein the base body and at least one Fluid delivery unit are detachably connected to one another.
  • the fluid dispensing unit can also be at least partially demountable.
  • elements that are arranged in the head part of such a fluid delivery unit can be covered with the aid of the cover cap in their position of use on or in the head part and thus protected against contamination or damage.
  • the often small-scale individual parts of the fluid dispensing unit can easily fall apart and get lost after the fluid dispensing unit has been detached from the base body of the hand-held dispensing device.
  • this is prevented by the aforementioned cover cap.
  • a connection between the cover cap and the head part of the fluid dispensing unit can only be released with a certain amount of effort, sometimes only with the use of special tools.
  • the object of the invention is to provide a fluid dispensing unit and a hand-held metering device of the type mentioned at the beginning, which simplify dismantling of the fluid dispensing unit, for example for its repair or cleaning.
  • this object is achieved in a fluid dispensing unit of the type mentioned at the beginning with the means and features of claim 1.
  • the cover cap is fastened to the head part by means of a releasable snap connection, at least one latching projection and / or at least one latching recess of the snap connection having at least one inclined surface oriented in such a way that the snap connection can be released by rotating the cover cap relative to the head part.
  • cover cap can be rotated relative to the head part in its position of use fixed on the head part in order to release the snap connection.
  • a fluid dispensing unit is provided whose cover cap on the one hand is reliably attached to the head part of the fluid dispensing unit and whose cover cap on the other hand can be easily removed from the head part without great effort and, above all, without the use of a dismantling aid, in order to use the fluid dispensing unit for cleaning and / or cleaning purposes, for example. or to dismantle or open the repair and / or replacement of individual parts of the fluid delivery unit arranged in the head part.
  • the fluid delivery unit has a sealing means which is arranged in the head part.
  • the sealing means can be fixed or fixed with the cover cap in its position of use in the head part. In this way, the cover cap can have a double function. On the one hand, it can prevent the elements of the fluid dispensing unit arranged in the head part from being lost or soiled. On the other hand, it can ensure that the sealant remains positioned in its correct sealing position.
  • the at least one latching projection is arranged on the cover cap and the at least one latching recess is arranged on the head part.
  • the at least one locking recess is arranged on the cover cap and the at least one locking projection is arranged on the head part.
  • the at least one latching projection has an inclined surface on each of two opposite sides oriented transversely to the direction of rotation of the covering cap.
  • the at least one latching recess can each have an inclined surface on two opposite sides oriented transversely to the direction of rotation of the cover cap.
  • each latching recess and each latching projection has such an inclined surface on two opposite sides oriented transversely to the direction of rotation of the cover cap, the latching connection between the cover cap and the head part of the fluid dispensing unit can be easily established by rotating the cover cap relative to the head part in both conceivable directions of rotation be solved.
  • the at least one inclined surface is formed by a bevel on a side of the locking projection or the locking recess that is oriented transversely or at right angles to the direction of rotation of the cover cap.
  • the fluid dispensing unit can be designed as a piston unit in which the receiving space is a cylinder into which a piston of a hand-held metering device for dispensing a fluid arranged in the cylinder can be pushed. Through a By pushing the piston into the cylinder, the fluid contained therein can be expressed from the cylinder.
  • it can be provided that it - designed as a piston unit - has a piston itself as at least one displacement means, which piston can be displaced in the receiving space. The piston can then be displaced within the receiving space with further displacement means, for example a manual metering device.
  • the cover cap can have a passage opening.
  • a piston and / or a piston rod of a hand-held metering device, in particular a pipette, for example, can be introduced into the receiving space through this passage opening.
  • the sealant can be a sealing ring.
  • the sealing ring can also be a piston sealing ring with which a gap between a piston that can be inserted into the receiving space, in particular the cylinder, and the cylinder can be sealed.
  • the sealing means can be pressurized.
  • a compression spring and / or a pressure piece can be arranged between the cover cap and the sealing means.
  • the compression spring can first be pretensioned, which then causes the pressure piece can preferably press axially against the sealant. In this way, a reliable seal can be made.
  • the fluid delivery unit according to the invention can have a particularly compact shape if the cover cap can be inserted or inserted into the head part.
  • the at least one latching means that is to say the at least one latching projection or the at least one latching recess, are arranged on an outer circumference of the cover cap.
  • the locking trough completing the locking connection and / or the locking projection completing the locking connection can then be arranged or formed at a corresponding point on an inner circumference in a receptacle of the head part for the cover cap.
  • the head part can have a receptacle for the cover cap and the cover cap can be inserted or inserted into the receptacle of the head part.
  • the fluid dispensing unit can further comprise at least one fastening means for releasably fastening the fluid dispensing unit to a base body of a hand-held metering device.
  • This fastening means can be a thread, in particular an external thread, preferably formed on the head part.
  • the covering cap can have a grip area. In the position of use of the cover cap on the head part, this grip area can protrude beyond the head part, so that it is particularly easily accessible to a user of the fluid dispensing unit.
  • the area can be roughened, knurled and / or coated to prevent slipping in order to allow the rotatable release of the To make the cover cap of the head part even easier.
  • a hand-held metering device with the means and features of the independent claim directed to the hand-held metering device.
  • a hand-held metering device of the type mentioned at the outset is proposed to achieve the object, in which the at least one fluid dispensing unit is a fluid dispensing unit according to the invention.
  • the base body and the fluid dispensing unit can be releasably connected or connected to one another by means of a screw connection. In this way, the fluid delivery unit can be removed from the base body in a particularly simple manner.
  • a combined snap-screw connection can also exist between the base body and the fluid delivery unit. With such a snap-screw connection, it can be provided that when a defined screw-in depth is reached, a latching connection engages or is established which gives the user of the hand-held metering device haptic and, if necessary, acoustic feedback about the proper establishment of the connection between the base body of the hand-held metering device and the fluid dispensing unit . This feedback is generated by properly establishing the connection.
  • the manual metering device can have, as displacement means, at least one piston that can be pushed into a receiving space for a fluid with the aid of the actuation means and a piston rod connected to the actuation means and the piston.
  • it can have a piston rod connected to the actuating means and a piston of the fluid delivery unit as the displacement means.
  • the Figures 1 to 6 show different views of a hand-held metering device designated as a whole by 1.
  • the manual metering device shown in the figures is designed as a mechanical and manually operable pipette 2.
  • the hand-held metering device 1 has a base body 3 and a fluid dispensing unit 4.
  • the base body 3 comprises at least one displacement means 5 with which a fluid, in particular a liquid, can be dispensed and received with the fluid dispensing unit 4.
  • the base body 3 has an actuating means 5 a in the form of a lever for actuating the displacement means 5.
  • the base body 3 and the fluid delivery unit 4 are detachably connected to one another by means of a screw connection 6.
  • the displacement means 5 comprises a piston rod 8 connected to a piston 7 of the fluid delivery unit 4, which in FIG Figure 2 can be seen in the beginning. Piston 7 and piston rod 8 are connected to one another via a connecting piece 9.
  • the fluid delivery unit 4 comprises a receiving space 10 for receiving an air cushion, a shaft 11 and a head part 12.
  • the receiving space 10 is connected via a delivery channel 13 formed in the shaft 11 to a delivery opening 15 formed at a free end 14 of the shaft 11.
  • the head part 12 is arranged on a head end 16 of the fluid delivery unit 4 opposite the free end 14 of the shaft 11.
  • the head part 12 has a cover cap 17 which can be removed from the head part 12 and with which at least one sealing means 18 arranged in the head part 12 can be fixed in its position of use.
  • the covering cap 17 In its position of use on the head part 12, the covering cap 17 is rotatable relative to the latter and is fastened to the head part 12 by means of a releasable snap connection 19.
  • At least one latching projection 20 and / or at least one latching recess 21 of the snap connection 19 has at least one inclined surface 22 oriented in such a way that the snap connection 19 can be released by rotating the cover cap 17.
  • latching projections 20 are formed on the cover cap 17.
  • the head part 2 has latching recesses 21.
  • each of the two locking projections 20 are each formed by a bevel on the sides 23 and 24 of the respective locking projection 20, which are oriented transversely or at right angles to the direction of rotation of the cover cap 17.
  • the fluid delivery unit 4 is designed as a piston unit.
  • the receiving space 10 of this piston unit 4 is a cylinder 25.
  • the cover cap 17 has a passage opening 26 on the top.
  • the piston 7 and / or the piston rod 8 can be inserted through this passage opening 26 into the receiving space 10 of the fluid dispensing unit 4, which is designed as a cylinder 25, in order to displace an air cushion located there in the direction of the dispensing opening 15 connected to the cylinder 25 via the dispensing channel 13.
  • the displacement of the air cushion in the direction of the dispensing opening 15 is used to convey a volume of liquid to be dispensed, which is held in a pipette tip, out of the pipette tip.
  • the pipette tip is attached to the free end 14 of the shaft 11 and is then in pressure connection with the dispensing opening 15 and with the dispensing channel 13.
  • the air cushion can be displaced in the direction of the dispensing opening 15 for liquid dispensing the pipette tip and a displacement of the air cushion into the receiving space 10 can be used for receiving liquid into the pipette tip.
  • the sealing means 18 of the fluid delivery unit 4 is a sealing ring 27, which can also be referred to as a piston sealing ring 27, since it seals a gap between a wall of the receiving space 10 and the piston 7. This at least when the piston 7 is inserted into the receiving space 10 designed as a cylinder 25.
  • the fluid delivery unit 4 has a compression spring 28 and a pressure piece 29.
  • the pressure piece 29 is pressed against the sealing means 18 via the bias of the compression spring 28, so that this sealing ring can rest against the surfaces to be sealed against one another.
  • the sealing means 18 can be reliably fixed in its position of use in the head part 12 of the fluid dispensing unit 4.
  • the head part 12 has a receptacle 30 for the covering cap 17.
  • the cover cap 17 can be inserted into the receptacle 30 of the head part 12, as it is for example in the Figures 3 and 6 can be clearly seen.
  • the fluid dispensing unit 4 has a thread 31 designed as an external thread.
  • the external thread 31 is formed on an outside of the head part 12.
  • the cap 17 also comprises a grip area 32 which, in the position of use of the cap 17 on the head part 12, extends over the head part 12 survives.
  • the grip area 32 is provided with a knurl 33, that is, knurled.
  • the base body 3 of the hand-held metering device 1 has a mating thread 34 in the form of an internal thread which matches the thread 31 of the head part 12, which is designed as an external thread.
  • the cover cap 17 with which at least one sealing means 18 located in the head part 12 of the fluid delivery unit 4 can be fixed in its position of use.
  • the detachable snap connection 19 is provided between the cap 17 and the head part 12 and is formed by at least one latching projection 20 and / or at least one latching recess 21, with at least one inclined surface 22 oriented in this way being formed on the latching projection 20 and / or on the latching recess 21 is that the snap connection 19 can be released by rotating the cap 17 relative to the head part 12.

Landscapes

  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP17784547.6A 2016-11-14 2017-10-05 Fluidabgabeeinheit und handdosiervorrichtung mit wenigstens einer fluidabgabeeinheit Active EP3538274B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016121816.2A DE102016121816A1 (de) 2016-11-14 2016-11-14 Fluidabgabeeinheit und Handdosiervorrichtung mit wenigstens einer Fluidabgabeeinheit
PCT/EP2017/001176 WO2018086722A1 (de) 2016-11-14 2017-10-05 Fluidabgabeeinheit und handdosiervorrichtung mit wenigstens einer fluidabgabeeinheit

Publications (2)

Publication Number Publication Date
EP3538274A1 EP3538274A1 (de) 2019-09-18
EP3538274B1 true EP3538274B1 (de) 2020-08-19

Family

ID=60117619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17784547.6A Active EP3538274B1 (de) 2016-11-14 2017-10-05 Fluidabgabeeinheit und handdosiervorrichtung mit wenigstens einer fluidabgabeeinheit

Country Status (5)

Country Link
US (1) US11207673B2 (zh)
EP (1) EP3538274B1 (zh)
CN (1) CN110167671B (zh)
DE (1) DE102016121816A1 (zh)
WO (1) WO2018086722A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12077997B2 (en) 2015-09-12 2024-09-03 Adac Plastics, Inc. Motor vehicle gesture access system including powered door speed control
US11313159B2 (en) * 2015-09-12 2022-04-26 Adac Plastics, Inc. Gesture access system for a motor vehicle

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US4671123A (en) * 1984-02-16 1987-06-09 Rainin Instrument Co., Inc. Methods and apparatus for pipetting and/or titrating liquids using a hand held self-contained automated pipette
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Also Published As

Publication number Publication date
DE102016121816A1 (de) 2018-05-17
US11207673B2 (en) 2021-12-28
US20190262822A1 (en) 2019-08-29
EP3538274A1 (de) 2019-09-18
CN110167671A (zh) 2019-08-23
CN110167671B (zh) 2021-12-31
WO2018086722A1 (de) 2018-05-17

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