US3923205A - Liquid dispensing device - Google Patents

Liquid dispensing device Download PDF

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Publication number
US3923205A
US3923205A US452063A US45206374A US3923205A US 3923205 A US3923205 A US 3923205A US 452063 A US452063 A US 452063A US 45206374 A US45206374 A US 45206374A US 3923205 A US3923205 A US 3923205A
Authority
US
United States
Prior art keywords
dispenser
operating member
driver
pusher
actuator
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.)
Expired - Lifetime
Application number
US452063A
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English (en)
Inventor
Erik Lars Ohlin
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.)
Swelab Instrument AB
Original Assignee
Swelab Instrument AB
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 Swelab Instrument AB filed Critical Swelab Instrument AB
Application granted granted Critical
Publication of US3923205A publication Critical patent/US3923205A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/021—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type

Definitions

  • a device for repetitively dispensing a measured volume of liquid includes a self-contained dispenser which can be used either separately as a manual pipette or in combination with a power actuator when automatic repetitive dispensing is desired.
  • the power actuator is constructed to provide unobstructed access to it for the dispenser so that the dispenser can be placed in and removed from the actuator through a simple movement.
  • no manipulative operation is required to make the combination ready for operation as an automatic pipette respectively to separate the dispenser from the actuator.
  • Devices of this kind which are sometimes termed automatic pipettes, are used in automatic chemical analyzers, for example, where they may serve to dispense a predetermined volume, of a liquid reagent or diluent to each of a plurality of liquid samples.
  • the construction of the dispensing device according to the invention is based on the concept that the part performing the actual dispensing, hereinafter termed the dispenser, and the part repetitively actuating the dispenser, hereinafter termed the actuator, should not be more or less integrated components of the complete automatic dispensing device but should be capable of use independently of each other.
  • the dispenser should also be capable of use as a manual pipette, and one and the same actuator should be capable of use with different dispensers.
  • the dispenser When the dispenser is to be used for the automatic repetitive dispensing, it should be possible to place the dispenser in a dispensing position on or in the actuator by a mere shift and then the dispensing device should be ready for operation as an automatic pipette. In other words, no additional manipulative steps should be required to operatively connect the dispenser and the actuator.
  • FIG- URE is a perspective view of a dispensing device constructed in accordance with the invention.
  • the illustrated dispensing device comprises two separate main parts, namely a self-contained dispenser 11 and a power actuator 12.
  • the dispenser includes a glass container 13 holding the liquid to be dispensed and having a cap 14, and a positive-displacement pump which is mounted on the cap and includes a single-acting vertical piston pump 15 having a discharge tube 16 and an operating member 17 projecting upwardly from the cap and fixedly connected with the pump piston 18.
  • the operating member 17 is urged upwardly by a spring 19 and can be displaced up and down between an advanced, lower extreme position, which is fixed and defined by the engagement of the pump piston 18 with a fixed stop, namely the bottom of the pump cylinder 20, and a retracted, upper extreme position, which is defined by the engagement of a knob on the upper end of the operating member with a vertically adjustable stop 21.
  • the detailed construction of the pump 15 forms no part of the present invention and hence it is believed sufficient to state that once the pump. is filled with liquid from the container 13, the depression of the operating member 17 from the upper to the lower extreme position will cause a liquid volume determined by the setting of the stop 21 to be dispensed through the discharge tube 16. When the operating member is then released, it is returned to the upper extreme position by the spring 19, thereby performing the final portion of a pumping cycle and aspirating an equal volume into the pump from the container.
  • The'actuator 12 has a base plate'22 and a head 23 supported above the base plate, which serves as a support for the dispenser, by means of a pair of vertical posts 24.
  • the spacing of the posts 24 is sufficient to permit a ready positioning of the dispenser in a dispensing position on the base plate between the posts and a ready removal of the dispenser from that position.
  • the base plate 22 may be provided with a recess, a rim, pilot projections or other elements facilitating the placing of the dispenser in the dispensing position.
  • the head 23 includes a vertically guided driver rod 25 which is reciprocable between a lower, extended extreme position and an upper, withdrawn position by a slot-and-pin drive mechanism 26 having a motor 27.
  • the controls of the motor are arranged such that the motor either rotates continuously or rotates only one revolution at a time and such that it is always stopped when the driver rod is in or near its upper extreme position.
  • the lower end of the driver rod 25 is provided with a pusher member 28 which is adapted to press on the upper end of the operating member 17 of the dispenser 11 and which is displaceable upwardly relative to the driver rod against the action of a compression spring 29.
  • the downward bias imposed on the pusher member 28 by the spring 29 is at least slightly greater than the maximum upward bias imposed on the operating member 17 by the spring 19.
  • the fixed distance between the extreme positions of the driver rod 25 is at least slightly greater than the maximum distance between the extreme positions of the operating member 17, the arrangement being such that the lower end of the vertical path traversed by the lower end of the pusher member 28 during reciprocation of the driver rod 25 with the dispenser 11 removed from the base plate 22 is situated slightly below the lower extreme position of the upper end of the operating member 17.
  • the dispenser 11 can be placed in the dispensing position on the base plate 22 with the operating member 17 exactly below the driver rod and the pusher member, and then removed therefrom, there being nothing impeding this positioning and removal, which can be effected by a mere horizontal shift of the dispenser, even if the operating member 17 is in its upper extreme position.
  • a device for repetitively dispensing a predetermined quantity of liquid comprising:
  • a dispenser including a positive-displacement pump having an operating member, said operating member being displaceable between an advanced position defined by a stop and a retracted position operating member to displace it to said advanced position of said operating means and for accommodating the difference in said distances, said pusher having a bias toward its extended position exceeding that of said biasing means.
  • a device including a pin and slot connection between said pusher and said driver, the slot having a length at least as great as said differences in distances.
  • a device including a motor having a crank arm, and a pin and slot connection between said crank arm and said driver.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
US452063A 1973-03-29 1974-03-18 Liquid dispensing device Expired - Lifetime US3923205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7304419A SE371370B (fr) 1973-03-29 1973-03-29

Publications (1)

Publication Number Publication Date
US3923205A true US3923205A (en) 1975-12-02

Family

ID=20317057

Family Applications (1)

Application Number Title Priority Date Filing Date
US452063A Expired - Lifetime US3923205A (en) 1973-03-29 1974-03-18 Liquid dispensing device

Country Status (5)

Country Link
US (1) US3923205A (fr)
FR (1) FR2223673B3 (fr)
GB (1) GB1457055A (fr)
IT (1) IT1011649B (fr)
SE (1) SE371370B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033518A (en) * 1990-03-19 1991-07-23 National Instrument Company, Inc. Fine adjustment for filling machine having piston differential pressure
US20100181343A1 (en) * 2007-06-08 2010-07-22 Johnsondiversey, Inc. Fluid dispensing apparatus and method
WO2014158484A1 (fr) * 2013-03-13 2014-10-02 Illinois Tool Works Inc. Procédé et appareil permettant de distribuer un matériau visqueux sur un substrat
WO2019012548A1 (fr) * 2017-07-10 2019-01-17 Anil Karuoor Achankunju Appareil de mesure et de distribution de liquide

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI820432L (fi) * 1982-02-10 1983-08-11 Rosenlew Ab Oy W Manovreringsanordning foer endoseringspump, speciellt foer en faergnyanseringsmaskin

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548752A (en) * 1950-04-15 1951-04-10 Wyott Mfg Co Inc Pump dispenser
US2858965A (en) * 1954-04-13 1958-11-04 Sterling M Berman Apparatus for spraying liquids
US3127060A (en) * 1964-03-31 Automatic actuator for spray containers
US3643836A (en) * 1969-12-18 1972-02-22 William Grayson Hunt Programmed timer device and dispensing apparatus incorporating same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127060A (en) * 1964-03-31 Automatic actuator for spray containers
US2548752A (en) * 1950-04-15 1951-04-10 Wyott Mfg Co Inc Pump dispenser
US2858965A (en) * 1954-04-13 1958-11-04 Sterling M Berman Apparatus for spraying liquids
US3643836A (en) * 1969-12-18 1972-02-22 William Grayson Hunt Programmed timer device and dispensing apparatus incorporating same

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033518A (en) * 1990-03-19 1991-07-23 National Instrument Company, Inc. Fine adjustment for filling machine having piston differential pressure
US10022739B2 (en) 2007-06-08 2018-07-17 Diversey, Inc. Fluid dispensing apparatus and method
US20100181343A1 (en) * 2007-06-08 2010-07-22 Johnsondiversey, Inc. Fluid dispensing apparatus and method
US8668117B2 (en) 2007-06-08 2014-03-11 Diversey, Inc. Fluid dispensing apparatus and method
US11484899B2 (en) 2007-06-08 2022-11-01 Diversey, Inc. Fluid dispensing apparatus and method
US11027300B2 (en) 2007-06-08 2021-06-08 Diversey, Inc. Fluid dispensing apparatus and method
US9227212B2 (en) 2007-06-08 2016-01-05 Diversey, Inc. Fluid dispensing apparatus and method
US10576486B2 (en) 2007-06-08 2020-03-03 Diversey, Inc. Fluid dispensing apparatus and method
JP2016518959A (ja) * 2013-03-13 2016-06-30 イリノイ トゥール ワークス インコーポレイティド 基材上に粘性材料を供給する方法及び装置
JP2019063806A (ja) * 2013-03-13 2019-04-25 イリノイ トゥール ワークス インコーポレイティド 基材上に粘性材料を供給する方法
US9636699B2 (en) 2013-03-13 2017-05-02 Illinois Tool Works Inc. Method and apparatus for dispensing a viscous material on a substrate
US9144818B2 (en) 2013-03-13 2015-09-29 Illinois Tool Works Inc. Method and apparatus for dispensing a viscous material on a substrate
WO2014158484A1 (fr) * 2013-03-13 2014-10-02 Illinois Tool Works Inc. Procédé et appareil permettant de distribuer un matériau visqueux sur un substrat
WO2019012548A1 (fr) * 2017-07-10 2019-01-17 Anil Karuoor Achankunju Appareil de mesure et de distribution de liquide

Also Published As

Publication number Publication date
GB1457055A (en) 1976-12-01
FR2223673A1 (fr) 1974-10-25
FR2223673B3 (fr) 1977-01-07
IT1011649B (it) 1977-02-10
SE371370B (fr) 1974-11-18

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