US3715058A - Dosing apparatus - Google Patents

Dosing apparatus Download PDF

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Publication number
US3715058A
US3715058A US00120664A US3715058DA US3715058A US 3715058 A US3715058 A US 3715058A US 00120664 A US00120664 A US 00120664A US 3715058D A US3715058D A US 3715058DA US 3715058 A US3715058 A US 3715058A
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US
United States
Prior art keywords
container
liquid
recess
pin
dosing apparatus
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
US00120664A
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English (en)
Inventor
A Clymans
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3715058A publication Critical patent/US3715058A/en
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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
    • G01F11/10—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 moved during operation
    • G01F11/12—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 moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
    • G01F11/14—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 moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber reciprocates
    • G01F11/16—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 moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber reciprocates for liquid or semiliquid

Definitions

  • a pin which is movable
  • the recess is emptied outside n the chamber after a return stroke
  • Capable of [58] held of cooperating with this pin is a spring-loaded member which is in the form of the recess and is capable of dis- 73/422 GC placing a quantity of gas which may be in said recess Y after which the recess is filled with liquid.
  • the invention relates to a dosing apparatus intended for dosing a liquid material.
  • the apparatus has a storage container for the material, which is sealed in a liquid-tight manner on at least one side.
  • a cylindrical pin is arranged for axial movement through the pin.
  • the pin has a recess on its side which is located in the storage container when the pin is fully lifted and is located outside the storage container when the pin is fully depressed.
  • Such a dosing apparatus has a disadvantage in that when dosing takes place in a space containing air and/or gas, air and/or gas can be returned to the container. This is undesirable, however, since the resulting dosing becomes non-uniform, because the recess is already filled, at least partly with air or gas, which remains in said recess so that the liquid material cannot fill the recess or cannot fill it completely.
  • the invention avoids this drawback by providing a member in the storage container secured to said container in a resilient manner.
  • the member has approximately the same shape as the recess and enters the recess when the pin is fully lifted. As a result of this the recess is completely emptied and air and/or gas, if any, is removed prior to the recess being filled again so that the dosing becomes as uniform as possible and it is ensured that the complete space is filled.
  • the recess is in the form of a part ofa cylinder envelope.
  • the recess in order to facilitate the flowing-out of the liquid, is in the form ofa drop.
  • the material to be closed is an amalgam
  • communications are provided to supply and/or remove a protective inert gas, preferably argon, both to and from, the storage container and to and from an outlet pipe for the dosed amalgam connected to said container.
  • a protective inert gas preferably argon
  • a device may be provided by which the pin receives an impact during its downward movement and after the recess has left the container.
  • said impact device preferably is formed of a spring which is tensioned by the downward movement of the pin and is suddenly relaxed during the further downward movement.
  • the container comprises a heating device which preferably consists of an electric heating coil wound around the container.
  • the inert protective gas to be supplied may also be preheated.
  • FIGURE is a longitudinal cross-sectional view of a dosing apparatus according to the invention.
  • Reference numeral 1 in the figure denotes a cylindrical container manufactured from chromium nickel steel and comprising a flange 2 to which a cover 3 likewise manufactured from chromium nickel steel is secured in a gas-tight manner.
  • This cover has an inlet 4 through which argon under a slight positive pressure of a few cms of water is conducted to the inside of the container 1 and an inlet 5 having a larger diameter than the inlet 4 and through which a liquid warm amalgam, for example consisting of mercury-sodium, is poured in the container 1 and the argon flows out of the container.
  • An electric heating coil with connections 7 is arranged around the container.
  • an outlet pipe 8 is connected in an air-tight and liquid-tight manner, said pipe consisting, for example, of quartz and comprising a branch pipe 9 through which preheated argon flows in the outlet pipe and leaves said pipe on the lower side.
  • the outlet of the dosed quantity of amalgam is like-wise supported and the rate of removal is increased.
  • the dosing pin 10 which is manufactured from tungsten and slides through the cover 3 and the bottom of the container 1 with the best possible fit.
  • the pin On the upper side of the pin 10, a button 11 is present; the pin furthermore comprises a recess 12 which, in the lowermost position of the pin, just engages in the outlet pipe 8 and in the upper position of the pin is in the container 1 and has the shape of a part of a cylinder envelope.
  • a spring 13 is secured to the inside of the con tainer and a member 14 which has the same shape as the recess 12, is connected to the spring. When the pin 10 is lifted, said member 14 engages in the recess 12. As a result of the spring 13, said member can easily snap into and out of the recess 12 during the movement of the pin.
  • a spring 16 is secured to the cover 3 by means of a screw 15.
  • a compressed-air cylinder 17 (shown diagrammatically) is present, a plunger 18 of which is connected to the knob 11 of the pin 10.
  • the entire dosing apparatus is intended for closing an amalgam of mercury-sodium, which amalgam should be introduced into a discharge tube in an accurately determined quantity.
  • the pin 10 When the container 1 is filled with amalgam, the pin 10 is moved downwards by means of the plunger 18.
  • the protective gas argon ensures that the amalgam does not contact the atmosphere.
  • the quantity of amalgam present in the recess drops in the outlet pipe 8 and then in a discharge tube temporarily connected to the outlet pipe.
  • a gas-bubble of argon mayremain in the recess as a result of which the correct quantitycf amalgam does not get into said recess; however, the member 14 then snaps into said recess 12 and ensures that all the gas is removed from the recess prior to said recess being filled with amalgam.
  • the embodiment of the invention described is intended for dosing a quantity of amalgam under the protection of an inert protective gas (argon) and gives excellent results in practice; the quantity of amalgam supplied varies within very narrow limits.
  • the apparatus may be used for many liquids whether or not using an inert protective gas and with or without heating of the container.
  • a preheated inert protective gas may also be used; particularly when said gas is supplied through inlet 9, the removal of the dosed quantity out of the recess is supported and the rate of removal in the pipe 8 is increased.
  • the recess 12 may also be in the form of a drop which is of advantage in the case of certain materials to be dosed.
  • a liquid dosing apparatus comprising a container for storing the liquid to be dosed, a liquid-tight seal on at least one side of said container, a cylindrical pin arranged for axial movement within said cylinder and through said liquid-tight seal, means connected to said pin at an end of the container remote from said liquidtight seal for causing said axial movement of said pin, means connected to said container for supplying the liquid to be dosed thereto, a recess situated on a side of said cylindrical pin for accommodating therein a predetermined quantity of liquid when said pin has been moved to its fully lifted position so that said recess will be located within the storage container and for delivering said predetermined quantity of liquid to an outlet pipe connected to said container when said cylindrical pin is in a fully depressed position so that said recess will have been moved outside said container and into said outlet pipe through said liquid-tight seal, a member having approximately the same shape as said recess carried within said storage container and resiliently secured to said container so that when said cylindrical pin is in its fully lifted position and located within said container said
  • liquid to be dosed is amalgam and further comprising a first communication means connected to said storage container for supplying and removing a protective inert gas thereto and therefrom, and second communication means connected to said outlet pipe connected to said container for supplying and removing therefrom said protective inert gas.
  • liquid dosing apparatus further comprising means connected to said storage container for causing an impact on said cylindrical pin during axial movement of said pin from said container into said outlet pipe and at a point after the recess has exited said container.
  • liquid dosing apparatus further comprising an electric heating coil wound about said container for heating said container and electrical connection means connected to said heating coil for causing energization thereof.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Vacuum Packaging (AREA)
  • Sampling And Sample Adjustment (AREA)
US00120664A 1970-04-04 1971-03-03 Dosing apparatus Expired - Lifetime US3715058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7004874A NL7004874A (OSRAM) 1970-04-04 1970-04-04

Publications (1)

Publication Number Publication Date
US3715058A true US3715058A (en) 1973-02-06

Family

ID=19809762

Family Applications (1)

Application Number Title Priority Date Filing Date
US00120664A Expired - Lifetime US3715058A (en) 1970-04-04 1971-03-03 Dosing apparatus

Country Status (5)

Country Link
US (1) US3715058A (OSRAM)
DE (1) DE2113289A1 (OSRAM)
FR (1) FR2085845B3 (OSRAM)
GB (1) GB1345259A (OSRAM)
NL (1) NL7004874A (OSRAM)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822597A (en) * 1972-12-04 1974-07-09 J Clark Method and apparatus for sampling liquids
US4356733A (en) * 1979-10-19 1982-11-02 Siemens Aktiengesellschaft Dosing device for gas chromatography
US5379921A (en) * 1991-05-24 1995-01-10 Odin Developments Limited Nozzle and valve assembly
US6537244B2 (en) 1999-01-19 2003-03-25 Assistive Technology Products, Inc. Methods and apparatus for delivering fluids
US20050267402A1 (en) * 2004-05-27 2005-12-01 Janice Stewart Multi-state alarm system for a medical pump
US20050277873A1 (en) * 2004-05-27 2005-12-15 Janice Stewart Identification information recognition system for a medical device
US20050277890A1 (en) * 2004-05-27 2005-12-15 Janice Stewart Medical device configuration based on recognition of identification information

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1566187A (en) * 1923-07-06 1925-12-15 James L Fifer Seed planter
US3401565A (en) * 1966-02-28 1968-09-17 Armour & Co Liquid sampling apparatus for gas chromatography

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1566187A (en) * 1923-07-06 1925-12-15 James L Fifer Seed planter
US3401565A (en) * 1966-02-28 1968-09-17 Armour & Co Liquid sampling apparatus for gas chromatography

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822597A (en) * 1972-12-04 1974-07-09 J Clark Method and apparatus for sampling liquids
US4356733A (en) * 1979-10-19 1982-11-02 Siemens Aktiengesellschaft Dosing device for gas chromatography
US5379921A (en) * 1991-05-24 1995-01-10 Odin Developments Limited Nozzle and valve assembly
US6537244B2 (en) 1999-01-19 2003-03-25 Assistive Technology Products, Inc. Methods and apparatus for delivering fluids
US6752779B2 (en) 1999-01-19 2004-06-22 Assistive Technology Products, Inc. Methods and apparatus for delivering fluids
US20050267402A1 (en) * 2004-05-27 2005-12-01 Janice Stewart Multi-state alarm system for a medical pump
US20050277873A1 (en) * 2004-05-27 2005-12-15 Janice Stewart Identification information recognition system for a medical device
US20050277890A1 (en) * 2004-05-27 2005-12-15 Janice Stewart Medical device configuration based on recognition of identification information
US7927313B2 (en) 2004-05-27 2011-04-19 Baxter International Inc. Medical device configuration based on recognition of identification information
US8961461B2 (en) 2004-05-27 2015-02-24 Baxter International Inc. Multi-state alarm system for a medical pump
US9925334B2 (en) 2004-05-27 2018-03-27 Baxter International Inc. Multi-state alarm system for a medical pump
US10518030B2 (en) 2004-05-27 2019-12-31 Baxter International Inc. Medical fluid therapy system having multi-state alarm feature
US11583628B2 (en) 2004-05-27 2023-02-21 Baxter International Inc. Medical fluid therapy system having multi-state alarm feature

Also Published As

Publication number Publication date
FR2085845B3 (OSRAM) 1974-02-15
NL7004874A (OSRAM) 1971-10-06
DE2113289A1 (de) 1971-10-28
GB1345259A (en) 1974-01-30
FR2085845A7 (OSRAM) 1971-12-31

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