UA142472U - MULTICAMERAL PISTON PISTON SYRINGE DISPENSER - Google Patents

Abstract

A multi-chamber piston syringe dispenser for fluid dosing and infusion, comprising at least two cylindrical chambers for at least a single use with a piston mechanism, located parallel to each other and parallel to the Central axis. Calibration from 0 ° to 360 ° is applied on the side and end surfaces of the nut, and a reference mark is applied on the flange.

Description

The utility model belongs to the devices for dosed delivery of several substances with a given dosage for obtaining a multicomponent mixture. It will be most widely used in medicine, technology and other fields.

The purpose of dosing devices (or dispensers) is to accurately measure liquid, fluid or viscous substances. Dosing devices are widely used in many industries that require the simultaneous dosing and delivery of several portions of certain fluids, as well as in chemical, diagnostic, clinical, scientific and manufacturing laboratories, for various laboratory studies and procedures. The principle of operation of most such devices is based on the creation of excess pressure in the container with the dosed product, due to which the product is pushed out of it in the required amount.

One of the types of devices of this series are piston-dosing syringes. They are the most common among a wide array of devices that are in demand in those areas that require particularly accurate dosing, in particular, small doses of certain products, drugs, medicinal substances, etc. For example, in medicine, when working with expensive reagents for metered infusion of drugs, accurate measurement of their minimum volumes is very important. Firstly, this is the economy of the substance, secondly, the exceptional accuracy and reliability of measuring the volume of a certain reagent, which is extremely necessary when conducting effective infusion therapy, resuscitation, intensive care, in pediatrics, in surgery, etc. It is the medical industry that most needs the creation of reliable, compact piston syringe-dosers, capable of providing not only accurate dosage of medicines, but also a better therapeutic effect with a minimum of causing unwanted sensations to the patient.

In the known state of the art, there is a wide arsenal of design variants of various piston syringe dispensers, where the construction features of each variant primarily depend on the type and properties of the working substances used and the industry in which they are used.

Thus, a piston drop dispenser is known, made in the form of a syringe, containing a body with inlet and outlet holes and a working chamber formed by this piston. The piston moves with the help of a rod, providing droplet supply of liquid (patent of Ukraine Mo 82911, MPKU: РО1М 9/00, publ. 05/20/2008, Byul. Me 10, 2008). The disadvantage of this dispenser is that

Due to which it has a limited scope of application - the device works only with one type of product - a transport additive.

The device described in RF patent No. 2264231 (MPK8: AbIM 5/178, publ. 01.27.2005, Byul. Me3) is more perfect from the point of view of the ability of dosed supply of several substances. It has sealed tanks with different substances and a piston mechanism, which includes a piston chamber, a piston and a rod, while the tanks have different cross-sections. In the process of movement of the piston, mixing of both substances (liquid and powder) takes place, and the desired mixture of drugs is obtained at the output. The device is effective in medicine for injections and infusions, but in cases that require dosing of the volume of individual ingredients of the mixture in the process of their exit from the tank, it cannot be used.

A similar design of the syringe-doser is presented in the patent of the Russian Federation Mo 2246321 (MPK: AbI1M 5/178, publ. 20.02.2005, Byul. Mo 5). As in the above example, the device has sealed reservoirs of substances and a reciprocating mechanism including a cylinder, piston and rod, and operates according to the same algorithm, and therefore has the same disadvantages.

An analogue of a useful model is a multi-chamber piston syringe-doser for dosing liquids and infusions, which includes at least two cylindrical chambers for at least one-time use with a piston mechanism, located parallel to each other and parallel to the central axis (patent RF Mo 2684037, IPC): Ab1TM 5/19, published 04/03/2019, Bull. Me10).

The principle of operation of this device is based on alternate feeding of the same or different substances, filled into the chambers. The number of chambers can be any, depending on the type of substances needed for infusions or injections. Each chamber is equipped with its own piston mechanism. The outlet ends of the cameras are connected to a fixed element, in which corresponding holes are made, and which interacts with a special housing, which is scrolled relative to the fixed element (respectively, relative to the outlet ends) and has one outlet hole. In order to ensure the exit of the substance from the chamber, in the process of scrolling, the exit hole of the housing is centered with the required hole of the stationary element.

As evidenced in the description of this technical solution, the use of the device is especially effective in case of emergency medical assistance, when the patient needs urgent administration of several medical drugs in the shortest possible time. Such situations can be, for example, sudden cardiac arrest, anaphylactic shock, acute attacks of allergies, etc. But, given the design of the device, achieving such an effect is problematic for several reasons, the main of which is the difficulty of ensuring the exact dosage of the starting drugs, as well as the difficulty of controlling the dynamics of the process of their introduction. In other words, it is impossible to control the amount of substance that enters the patient's muscle tissue or venous system per unit of time, it depends on the force with which the doctor presses the syringe head and the volume of the latter. The doctor simply squeezes out the contents of the chambers/lenses, which in some cases may be critical or redundant, and this may lead to negative consequences.

All cameras included in the device (in fact, it is a block of cameras) are equipped with an individual piston mechanism that moves independently of each other. If it is necessary to re-fill the chambers, it is necessary to remove the rods with pistons from the chambers each time, and this not only complicates the construction as a whole, but can also lead to a violation of the sterility conditions.

In addition, the device cannot be used in cases that require simultaneous squeezing of the drug from several chambers, for example, when it is necessary to obtain multi-component mixtures, the ingredients of which must be mixed not immediately, but only immediately before use and in a certain proportion, otherwise the mixture loses its consumer properties.

The basis of the useful model is the task of increasing the efficiency of the multi-chamber piston syringe dispenser by improving its structural design, in particular, by equipping it with disposable or reusable chambers with the same or different cross-section, combining the rods of the piston mechanisms into one block with the possibility of moving the latter according to using a screw-nut mechanism, equipping single-use chambers with an additional piston, applying appropriate graduations to the transparent walls of the chambers, the side and end surfaces of the nut, which ensures the simultaneous output of substances from several chambers in the required proportion and the possibility of controlling the movement of the pistons relative to the graduation of the walls of the chambers (a , that is, by the volume of the extruded substance), prevents the violation of sterility conditions when replacing disposable cameras, and also allows you to adjust the stroke of the pistons by turning the screw-nut mechanism to the appropriate angle.

The task is solved due to the fact that in a multi-chamber piston

Of a dosing syringe for dosing liquids and infusions, which includes at least two cylindrical chambers for at least one-time use with a piston mechanism, located parallel to each other and parallel to the central axis, according to a useful model, the cylindrical chambers are united by a bar and together with the piston mechanisms are placed in the housing, the rods of the piston mechanisms of each chamber are rigidly fixed on a flange mounted with the possibility of reciprocating movement relative to the housing by means of a nut with an internal thread placed on a rod with a corresponding thread fixed on the housing, each single-use chamber is equipped with an additional piston installed in its cavity with the possibility of free movement relative to its walls, a protrusion is located at the end of each rod, while in the chamber for one-time use, the protrusion is centered with the corresponding depression made on the surface of the additional piston, in addition, on the outer side graduations are applied to the walls of the chambers, and their outlet channels are equipped with protective threaded plugs. On the side and end surfaces of the nut can be graduated from 0" to 360", and on the flange - a counting mark.

The technical result indicated above, which is achieved in the process of implementing the proposed device, is due to features that distinguish it from similar designs of syringe-dispensers, described according to the known state of the art, in particular, in the solution adopted as an analogue.

The proposed device differs from the known one by its versatility, which is due to the possibility of combining in one design two versions of the syringe-doser - single-use and multiple-use. Depending on the purpose, the syringe-dispenser can be equipped with chambers with one or different cross-section ratio, and due to the fact that the pistons are united in one block, the substances placed in the chambers are squeezed out with a given ratio of the volumes of the ingredients. In this way, with the same movement of the pistons, it is possible to simultaneously obtain at the output different dosed volumes of each working substance. Control over the volume of displaced substances is carried out visually with orientation to the graduation applied to the transparent walls of the chambers. The unit of graduation can be either linear millimeters or centimeters or cubic. In medicine, this allows you to set a program for obtaining a mixture with precise simultaneous dosing of components for infusion, which causes the necessary therapeutic effect and helps to avoid the aforementioned complications that arise when using the 60 device described in the analogue. In other industries, the effect of using a device of this construction is also manifested in the possibility of strict control over the process of obtaining various mixtures with the required ratio of ingredients.

An additional factor that provides effective control over the volume of substances displaced from the cylindrical chambers is the application of graduations from 0" to 360" on the side and end surfaces of the nut. In fact, it is an alternative to the graduation present on the transparent walls of the cylinders. That is, adjustment of the stroke of the rod can be set both by rotating the nut along the threaded rod and by turning it to the desired angle. In the latter case, the reference point for turning the nut is the mark on the connecting bar.

The device is also distinguished by the fact that the rods of the piston mechanisms of each chamber are rigidly fixed on the flange, that is, they are combined into a block, the movement of which is set by a nut that moves along the threaded rod. Obviously, this form of fixing the piston rods guarantees their simultaneous reciprocating movement at the same speed and the same distance. And this, in turn, ensures the output of substances of a given volume, each of which depends on the cross-sectional area of the corresponding chamber. In addition, combining the rods into a block significantly facilitates the operation of the device, in particular, it ensures trouble-free replacement (for single-use cameras) or refueling of a spent group of cylindrical cameras with another in the case of reusable cameras. To replace, you need to raise the block by moving the nut along the threaded rod to the upper position to the level at which the cameras are easily removed from the housing, after which the blocks are replaced.

At the same time, the process of replacing the blocks of both disposable and reusable cameras is the same, as is the principle of their operation. The difference between the blocks is that there is an additional piston in the cavity of the single-use chambers, the presence of which guarantees the preservation of sterility conditions when replacing the used block with a new one. The projection located at the end of the rod is centered with the corresponding depression of the additional piston at the time of liquid extraction - this is how the work process takes place in conditions of complete sterility.

If there is no need to use a disposable sterile chamber, a chamber without an additional piston is used, in which the pressure is created by a classic rod with a rigidly fixed piston. In this case, a new portion of the working fluid can be filled into the same chamber by removing it from the housing as described above. It provides opportunities

To use the camera repeatedly.

The structural design of the device is explained by the drawings, where Fig. 1 schematically shows the general view of the device with cameras for one-time use; in fig. 2 schematically depicts the general view of the device with cameras for multiple use; in fig. C - component elements of the device; in fig. 4, 5, 6 - a view of the device with corresponding sections.

The syringe dispenser (Fig. 1-6) has at least two cylindrical chambers 1 with a piston mechanism, which consists of a rod 2 and a piston 3. The chambers are connected by a bar 4, and together with the piston mechanisms are placed in the housing 5. The rods 2 of the piston mechanisms of each camera are rigidly fixed on the flange b, installed with the possibility of reciprocating movement relative to the body 5 using a nut 7 with an internal thread (Fig. 1-4).

The nut 7 is placed on a rod 8 with a corresponding thread, fixed on the body 5. At the end of each rod 2 there is a protrusion 9, which, in the case of using disposable cameras, is centered with the corresponding depression 11 (Fig. 3), made on the surface of the additional piston 10. On graduation 12 is applied to the outer side of the walls of the transparent chambers 1 (Fig. 1, 2).

On the side and end surfaces of the nut 7, graduation 13, (16, respectively) from 0" to 360" is applied, and on the flange 6 - a reference mark 14 (fig. 1-4). The output channels of cameras 1 are protected by threaded plugs 15 (Fig. 1-3).

The device functions as follows:

Before installing the cylindrical chambers 1 filled with the working substance in the housing 5, by turning the nut 7, raise the rod block 2 of the piston mechanisms to a level sufficient for the free placement of the chambers in the housing 5. Lifting the rods can also be done by simply moving them up manually. To bring the device into working condition, the block of rods is lowered to the contact of the projection 9 of the rods with the depression 11 of the additional pistons 10 (when using disposable sterile chambers) or in the case of using reusable chambers - to the contact of piston C with the working fluid. In the future, the substance is squeezed out of the chamber cavity by turning or twisting the nut 7 to the desired angle. At the same time, the volume of the displaced substance is controlled with orientation to the graduation marks applied to the transparent walls of the cylindrical chambers.

A comparison of the proposed piston-dosing syringe not only with its analogue, but also with other technical solutions in this area attests to its advantages, which are expressed in reliability, compactness, simplified design, and most importantly - in the ability to ensure accurate dosing of various substances in the required proportion at their simultaneous output from several cylinders.

Claims (1)

USEFUL MODEL FORMULA 1. A multi-chamber piston syringe dispenser for dispensing fluids and infusions, which includes at least two cylindrical chambers for at least one-time use with a piston mechanism, located parallel to each other and parallel to the central axis, which is characterized by the fact that the cylindrical chambers are united by a bar and together with the piston mechanisms are placed in the housing, the rods of the piston mechanisms of each chamber are rigidly fixed to a flange mounted with the possibility of reciprocating movement relative to the housing by means of a nut with an internal thread placed on a rod with a corresponding thread fixed to the housing, each chamber for disposable is equipped with an additional piston installed in its cavity with the possibility of free movement relative to its walls, a protrusion is located at the end of each rod, while in the disposable chamber, the protrusion is centered with the corresponding depression made on the surface of the additional piston, except moreover, graduations are applied on the outside of the walls of the chambers, and their outlet channels are equipped with protective threaded plugs. 2. A multi-chamber piston syringe-doser according to claim 1, which differs in that on the side and end surfaces of the nut there is a graduation from 0" to 360", and on the flange there is a counting mark. de : Y by, "NK fen TI y Mi Te y r va KN U a U in oh 351 at 75 ve NE she ia 5 ef mym Z y v Her a eh E : : : he. ! g peaks and currents nn 5 I NN By: N tm ndjzhllyuzhalyaaya, A. Ishn shsh A shi sh Pishy kah miy sce I: ICH VI CHEN I x NI SHE. 05. Aoizhya meeting of the EC | WHAT | what: ; baths nn nin ХА i и и : Н ! mine: now he ЖХ nn zvy z Ma Z | Kk LA EE | Iv re i m she i -: GU ha shchi OO h on in nn en m 7 Er; o Her not i a yar TT shry ni shik p - N anna «IN ot N cha t. ri I i N 1 un i E N N r i N . Sho hny ih: ZHY u: and those and usu HEARING FROM ; Hek і Kk KZ ХМ ОО і Я еко ШИ» кі вшчыни вай ня Ина З She t VE з ТК ; roni ke SHY se Shi I t N E " sn Y i N , M t i SCHI Nor ve i SHYNY Uh otut nn VK a SHE She KO kasha ; ia ny an OO s I NI a Poki i Ya er i COMI I: Y te KU i yan N shva z X zh i EH I OC TE dnyni: Fig. 1 N U u Kg I U TI KI it's time EE u I PUPPIES aa sec teku ki wa z pryat tt NN JE pzhyuu y I! oh her penyu Ii ; llyanu doschchabnnnn and H; оодитчнннн злу иди и и и и пт Укл Ш ес и нету Шиххжнжм ву: же ко M мя пкт и ша 3 Ж E дней Дн внов У EE te : and I H NOT | N y ; her I I . Ne KE hu dk i i y z V ESHKEE EN - Gz t U y - AV u koe Yan Y per ha N en eh A k She yi yi U an wanny s D dutyta yi yi ket cha se and seldrdnrchchnknk bustle: 3. one day 1 N day pyt M miz N y sotducchnzhtizhnkya Z o ! ; E and i : ; vk " ; N Z n | i 5. in N with KU gu. E N o t 33 135 2-5 ron i o Z NE vin o ezem NIY Mt I ledleyuyuyuzhn seni sshe Y nn Rirn ros» sht h ef uetkyun nia, N fo-n ek o. Yannia t N I dv fr o. Ar Oi I Z i TV tt Z eh y gh V o. i pek - well V U I I om xx I I SHE SCHE: it's already RN MON. 5 SHE 1 13 sh-- x s 13 MORE. ZE THESE. and 5... MI sosen SHY I 13 ZU koty N 11 - B «IN ka i NE - ih dE- oOoUh kto N I t- Ky MI he A i KE: pi Vi i ev i m A SHE NV ch i i : io - | In DN Eh mah fr» N Tl 1 X 1 Their -B also about NI: ni and NN. TE with ! borders I I E may (o I Konya N N ; VE TI nestasya N nn i they zi aa r sf i E N U EH I Kon N s dinya same in M - N same her o delldldnAE KT I AS 5 -u Iii 3 not « pl i yah Mas: pkkdm nefnya y z N sferya pe Te I black N fe KE i Y «Am Y vv p - s N dlkknkkya M VK ms: zhu: myh Mini V z: Hm y kh i. y pkzhzhkkkyuv uyu 3 suzhzhyazhzhzhnnnnnaya Km le, x H rn RK vh I N t j. ! wa o dok she mes Fig. 7