Injection device with dose limitation mechanism and safety mechanism

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to an injection device comprising a surplus dose injection protector. The injection device for medicine dose injection comprises a case, a dose injection mechanism, a dose limitation mechanism and a safety mechanism. The dose injection mechanism accommodates a dose setting element rotatable about the case to set a dose to be injected, a piston rod arranged relatively to the case in such a manner that while translating distally, the piston rod provides dose injection, converters of dose setting element rotation to piston rod translation. The dose limitation mechanism is interacting with the dose injection mechanism to avoid surplus dose injection. The safety mechanism is fixed relatively to the dose injection mechanism in such a manner that in the event of dose limitation mechanism malfunction, the safety mechanism prevents surplus dose injection.

EFFECT: invention prevents surplus dose injection in the event of protector malfunction.

10 cl, 1 dwg

 

The technical field to which the invention relates.

The invention relates to an injection device containing a mechanism for preventing the injection of a dose exceeding the set dose. In particular, the present invention relates to an injection device containing two independent mechanism to prevent injection of a dose exceeding the set dose.

The level of technology

With the introduction of drugs into the human body can be serious or even fatal consequences if the input dose exceeds the dose. Therefore, it is important that the injection device contains means for limiting the amount of injection of a set dose.

Disclosure of inventions

The present invention is the creation of an injection device containing means for preventing the injection of a dose exceeding the set dose. In addition, since such tools can deny that the present invention is the creation of an injection device containing a safety mechanism designed to prevent the injection of a dose exceeding the set dose, in case of failure of the means of preventing.

The present invention provides injection device for injection of a dose of medication, comprising a housing; a mechanism injectiion, includes installation item doses made with the possibility of rotation relative to the housing for installation subject to dose, the piston rod mounted relative to the housing so that the translational movement of the piston rod in the distal direction provides an injection dose, the means for converting rotational movement of the element installation doses in the forward movement of the piston rod; the mechanism of dose limitation made with the possibility of interaction with the mechanism of the injection dose to prevent injection of a dose exceeding the set dose; and a safety mechanism, which is mounted on a mechanism of injection dose so that in case of failure mechanism of dose limitation, the safety mechanism prevents the injection dose exceeding the prescribed dose.

An advantage of the present invention is that if the mechanism of dose limitation refused to limit the input dose is activated pressure relief mechanism and, thus, provides enhanced patient safety.

In one embodiment, the mechanism of dose limitation and safety mechanism are two independent mechanisms that operate independently from each other.

In one embodiment, two mechanism is configured to prevent simultaneous injection dose exceeding the prescribed dose. In another embodiment, the safety mechanism is activated only if the mechanism of dose limitation refused to prevent injection of a dose exceeding the set dose. In one embodiment, two mechanisms are installed so that the failure mechanism of dose limitation immediately activated safety mechanism so that an input dose does not exceed the prescribed dose. In another embodiment, the input dose is slightly higher than the prescribed dose, if the mechanism of dose limitation refused and activated safety mechanism. A slight excess means that changing the dose is too small to have serious or fatal consequences.

The housing may form a channel for the piston rod having an inner threaded surface for engagement with the external threaded surface of the piston rod and the piston rod is preferably mounted relative to the housing so that rotation of the piston rod relative to the housing causes the translational movement of the piston rod relative to the body.

In one embodiment, at least one mechanism from the mechanism of dose limitation and the safety mechanism is made with a chance to view the th limit relative rotational movement between the piston rod and the housing to rotate, corresponding to the injection of the set dose. In this case, the piston rod has an external threaded surface configured to interlock with the inner threaded surface of the housing. Accordingly, the rotational locking of the piston rod (relative to the body) leads to longitudinal blocking of the piston rod relative to the body.

The mechanism of dose limitation may contain at least one first retaining surface configured to contact at least one corresponding second retaining surface of the housing. In addition, the rotation of the element installation doses during installation doses may cause withdrawal of the first retaining surface of the second retaining surface, and rotating during injection of a dose can lead to convergence of the first and second surfaces. In addition, the injection dose can be prevented when the focus of the first retaining surface of the second retaining surface. Element installation doses may contain the first retaining surface. Alternative or as a complement element installation doses may be associated with the cylinder containing the first retaining surface, and the cylinder can be configured to display the prescribed dose. The first and second locking surfaces may be essentially flat the surfaces, passing in a direction parallel to the axial direction of the injection device. Alternatively, the locking surface can be held in a plane transverse to the axial direction, for example, orthogonal to the axial direction.

In one embodiment, the safety mechanism includes a limiter having a channel for the piston rod, and a channel stopper has an internal threaded surface for engagement with the external threaded surface of the piston rod; a leading element, forming a channel stopper, and the leading element is held rotatably with respect to the restrictor and connected with the element installation doses so that rotation of the element installation doses during installation doses causes rotation of a driving element, whereby relative rotation between the leading element and the piston rod during installation of the dose leads to the conclusion limiter from the locking position in which the stopper prevents the injection dose.

In one embodiment, the injection device is configured to prevent installation of a dose which exceeds the amount of drug in the reservoir of the injection device. In this embodiment, the piston rod may include a retaining surface, indicating the end of the sod is reimage, made with the possibility of entering into contact with the corresponding surface of the limiter when the set dose corresponds to the amount of drug in the reservoir of the device. Accordingly, in this embodiment, the limiter performs two functions. The first function is to prevent installation of a dose exceeding the amount of medication remaining in the container, and the second function is a safety feature that prevents the injection of a dose exceeding the set dose.

In addition, the injection device may contain auxiliary injection system to inject efforts to promote the user of the device of the piston in the distal direction for insertion of the prescribed dose. Auxiliary injection system can be made with the possibility of impacts on the piston in the distal direction so as to enter the dose without the help of a user when the user has already initiated injection.

Auxiliary injection system can include a spring, such as a torsion spring, which is designed for rotation of a driving element relative to the housing. The spring may be pre-stressed when the limiter is in stop position. Redundant safety system coz the ACLs to the invention has special advantages, when the spring is pre-stressed, as accidental release of the prestressing of the spring may cause the piston rod in rotation (and, thus, the longitudinal displacement)corresponding to the lethal dose, such as 100 IU of insulin.

Brief description of drawings

The invention will be described in more detail with reference to the drawing, which shows the injection device according to the present invention.

The implementation of the invention

The drawing shows the injection device 2, comprising a housing 4 and the piston rod 6. The injection device 2 also contains the element 8 installation doses and the leading element 10, which in the drawing are combined in one element. The injection device further comprises a scale drum 12 for indicating the set dose through the window 14. Scale drum 12 has an external threaded surface 15, is arranged to mesh with corresponding internal threaded surface 16 of the housing. Scale drum 12 is held rotatably relative to the leading element 10 through the slot of the gear 18. Scale drum 12 has a first locking surface 17 made with the possibility of contact with the second retaining surface 19 of the housing. The first retaining surface 17 and the second retaining surface 19 forming mechanism, the ZM 21 dose limitation. The first retaining surface moves away from the second retaining surface 19 during installation doses, and these surfaces are closer to each other during injection dose. When two surfaces against each other, injection drug device is terminated.

The injection device includes an auxiliary injection system in the form of a pre-stressed torsion spring 23 located between the leading element 10 and the proximal part 20 of the housing. Accordingly, when the rotating element 8 installation doses for the purpose of dose is an additional tension spring tension.

The piston rod 6 has an external threaded surface 22 made with the possibility of coupling with a corresponding internal threaded surface 24 of the housing and, accordingly, ensure rotation of the piston rod relative to the housing, resulting in longitudinal movement of the piston rod relative to the housing. External threaded surface 22 of the piston rod is also in threaded engagement with the internal threaded surface 26 of the stopper 28, which is shown in figure 1 in the stop position, when the lower surface 30 of the stopper is in contact with the top surface 32 of the guiding element 34 to the piston rod. The bottom surface 30 and the upper surface 32 form will protect the local mechanism 31. Between the bottom surface 30 and the top surface 32 may be provided with an air gap, which allows the limiter and porshneva the rod to be rotated by an angle corresponding slight increase in the dose of injection, for example, 3 IU of insulin, if the mechanism 21 of dose limitation refused during injection of a dose.

In addition, pointing to the end of the contents of the upper surface 36 of the limiter 28 is configured to contact indicating the end of the contents of the bottom surface 38 of the T-shaped end portion 40 of the piston rod. These surfaces come into contact, when the set dose corresponds to the amount of drug remaining in the tank (not shown) of the device. Accordingly, the contact surfaces prevents setting of a dose exceeding the amount of medication remaining in the container. It should be clear that the distance between these surfaces corresponds to the amount of medication remaining in the container.

In addition, the upper surface 11 of the drum 12 may be made with the possibility of contact with the lower surface 13 of the body when installing the maximum dose. The maximum dose is the highest dose that can be set for each injection (provided that the injection device contains the necessary amount of medication). M is ximala dose corresponds to the dose of the end of the content, which refers to the remaining amount of drug in the device. Accordingly, while the remaining amount of drug in the device is greater than the maximum dose, indicating the end of the content of the surface will not abut each other during installation of the dose. If the remaining amount of drug in the device is less than the maximum dose, indicating maximum dose surface will not abut each other during installation of the dose, as indicating the end of the content of the surface to prevent further rotation.

The limiter 28 and the leading element 10 are locked for relative rotation by means of interlocking engagement 42. Thus, when the piston rod is locked for rotation relative to the body, relative rotation between the leading element 10 and the piston rod 6 moves the stopper from the locking position toward the T-shaped end portion 40 (that is, upward in the drawing). Rotation of the piston rod relative to the housing is blocked when blocked relative rotation of the guide element 34 of the piston rod through the slot of the gear 44.

The leading element 10 and the guide element 34 to the piston rod interconnected bilateral ratchet 46, containing at least one of the first in erivaldo element 48, formed the leading element 10, and at least one second retaining element 50 formed by a guiding element 34 of the piston rod. Bilateral ratchet mechanism permits relative rotational movement between the leading element 10 and a guiding element 34 of the piston rod during installation of the dose and ensures transmission of the rotational motion of a driving element on the guide element 34 of the piston rod during injection of a dose.

The use of the following devices. In the initial state is locked, the rotation of the guide element of the piston rod relative to the housing. Then rotate the element installation doses to bring the host item and scale of the drum in rotation and additional voltage pre-stressed springs. At the same time, the stopper moves toward the T-shaped end portion. If the user tries to establish a dose that exceeds the amount of drug in the device, the stopper abuts against the T-shaped end portion, resulting in a large dose could not be established. The dose is administered by unlock rotation between the guiding element 34 of the piston rod and the housing, making the tense spring causes the leading element in rotation. Rotating the key element causes rotation of the guide e is ementa of the piston rod, that, in turn, causes rotation of the piston rod. Due to the interlocking gear 44 and the threaded connection between the piston rod and rotating the piston rod moves forward and, thus, the drug is expelled from the device.

1. The injection device for injection of a dose of medication, comprising a housing; a mechanism for the injection dose, which includes the installation item doses made with the possibility of rotation relative to the housing for installation subject to dose, the piston rod mounted relative to the housing so that the translational movement of the piston rod in the distal direction provides an injection dose, the means for converting rotational movement of the element installation doses in the forward movement of the piston rod; the mechanism of dose limitation made with the possibility of interaction with the mechanism of the injection dose to prevent injection of a dose exceeding the set dose; and a safety mechanism, which is mounted on a mechanism dose injections of such a way that in case of failure mechanism of dose limitation, the safety mechanism prevents the injection of a dose exceeding the set dose.

2. The injection device according to claim 1, characterized in that the housing forms a channel for the piston rod, it is Mering internal threaded surface for engagement with the external threaded surface of the piston rod, moreover, the piston rod is installed relative to the housing so that rotation of the piston rod relative to the housing causes the translational movement of the piston rod relative to the body.

3. The injection device according to claim 1 or 2, characterized in that at least one mechanism from the mechanism of dose limitation and safety mechanism configured to limit relative rotational movement between the piston rod and the housing to rotate corresponding to the injection of the set dose.

4. The injection device according to claim 1 or 2, characterized in that the mechanism of dose limitation includes the first retaining surface configured to contact with the corresponding second retaining surface of the housing, and rotation of the element installation doses during installation doses causes a departure of the first retaining surface of the second retaining surface, and when the focus of the first retaining surface of the second locking surface to prevent injection dose.

5. The injection device according to claim 4, characterized in that the element setup dose contains the first retaining surface.

6. The injection device according to claim 4, characterized in that the element installation doses associated with the cylinder containing the first retaining surface, and the specified cylinder is made with the possibility of display of the prescribed dose.

7. The injection device according to claim 1 or 2, wherein the safety mechanism includes a limiter having a channel for the piston rod, and a channel stopper has an internal threaded surface for engagement with the external threaded surface of the piston rod; a leading element, forming a channel stopper, and the leading element is held rotatably with respect to the restrictor and connected with the element installation doses so that rotation of the element installation doses during installation doses causes rotation of a driving element, whereby relative rotation between the leading element and the piston rod during installation of the dose leads to the conclusion limiter from the locking position in which the limiter prevents the injection dose.

8. The injection device according to claim 1 or 2, characterized in that it further comprises an auxiliary injection system to inject efforts to promote the use of user piston in the distal direction for insertion of the prescribed dose.

9. The injection device of claim 8, characterized in that the auxiliary injection system includes a spring for rotation of a driving element relative to the body.

10. The injection device according to claim 9, characterized in that the spring s is entrusted tense when the limiter in the stop position.



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to safe disposable syringes. Safe disposable syringe contains cylinder, plunger, piston, hollow needle and needle-holder. Cylinder has anterior and posterior open ends, limiting cavity and having axis (X). Plunger continues through posterior open end of cylinder into cavity and has anterior end. Piston is mounted on anterior end of plunger and is formed with first engaging element. Needle holder in proper manner is continued through anterior open end of cylinder and has anterior end located outside cylinder cavity, and posterior end, located in cavity, and having posterior butt surface facing piston. Needle holder limits central canal passing through anterior end of needle holder for placement of hollow needle, and limits flow canal, passing through posterior butt surface of needle holder posterior end and providing liquid connection of central canal with cylinder cavity. Posterior butt surface of needle holder posterior end is formed with second engaging element, which is aligned in longitudinal direction, and which is adapted for engagement with first engaging element. Flow canal has first end section, ending on posterior butt surface of needle holder posterior end, and has second end section, opposite to first end section and ending on posterior butt surface of needle holder posterior end. Second engaging element has end section, ending on posterior butt surface of needle holder posterior end and located at distance from first end surface of flow canal. Needle holder has external surface around axis (X) and flow canal, as a rule, U-shaped, which has radially continuing section, continuing radially with respect to external surface, and two sections, continuing in longitudinal direction, which continue respectively from two ends of radially continuing section to first and second end sections. Flow canal widens from inside radially with respect to external surface of needle holder on needle holder axial length.

EFFECT: obtaining possibility to use said syringe construction for syringes of small size, ie for syringes whose size constitutes less than 1 cm3.

12 cl, 11 dwg

FIELD: medicine.

SUBSTANCE: invention refers to a device for the introduction of liquid dosage forms to a mammal, preferentially to a human, preferentially subcutaneously, in more detail, the present invention refers to an injection device able to transfer a non-visual feedback signal to the user to indicate that a specified dose is introduced by the injection device. The injection device contains a body, a dose adjustment element, a piston rod and a dosing mechanism. The dose adjustment element is actuated by the user to specify a required dose for injection. The rod is designed to interact with the piston to ensure the introduction of the adjusted dose from an ampoule. The dosing mechanism is designed to actuate on the piston rod to ensure the introduction of the adjusted dose. Besides the dosing mechanism is designed to transmit a non-visual feedback signal to the user after the dosing termination only. The first and second sections of the injection device rotate relatively to each other during dosing that causes at least two sections of the injection device to rest on or interlock with each other. Said rest or interlocking enables a non-visual feedback signal to be transmitted.

EFFECT: invention ensuring exact and non-visual indication of the dosing termination to the user.

12 cl, 15 dwg

FIELD: medicine.

SUBSTANCE: manual injection device for the introduction of a dosed liquid form through an injection needle from a medical container by unlocking an power generator provided in the device. The power generator can be unlocked completely or partially by actuating a user-operated unlocking element located on an upper end of the injection device or adjoining said upper end represented by the end of the injection device that is opposed to the injection needle. The power generator is designed to produce energy by rotating a rotatable dose adjustment element. In addition, the device contains a rotatable drive member at least partially interlocked with at least a part of a driving slot in a piston rod. The drive member is arranged in the first axial position wherein the dose adjustment is found in the dose adjustment position and in the second axial position wherein the dose adjustment is set in the dose injection position. The drive member is designed to release the energy accumulated in the power generator when observing the second axial position.

EFFECT: device is ergonomic and initiates the adjusted dose injection by a first or second finger of a hand holding the injection device by applying axially directed force to the top of the injection device.

8 cl, 13 dwg

FIELD: medicine.

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EFFECT: invention facilitates dosage modification.

14 cl, 12 dwg

FIELD: medicine.

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9 cl, 5 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, in particular to device for injections, such as handle-injector with mechanism of windup where digital symbols displaying value of inserted from the device dose are shown within rotational angle, exceeding one complete turn. Device for injections contains unit setting dose liable for insertion from device for injections, torsional spring functionally connected with unit setting dose and detecting element. Detecting element is manufactured with capacity of rotational movement and adapted for displaying inserted from the device dose for injections in accordance with position of unit setting dose. Detecting element is set with capacity of rotational movement within rotational angle according to at least one complete turn.

EFFECT: invention provides improved and more favorable for customer procedure of setting the dose by means of expanded scale of doses with high resolution.

13 cl, 5 dwg

FIELD: medicine.

SUBSTANCE: actuating mechanism to be applied in a drug introduction device comprises a piston rod, a screw shaft, a dosing scale, an internal cylinder and a piston rod holder. The noncircular piston rod is hollow. The rod is blocked against rotation. The screw shaft is geared with a piston rod. The dosing scale rotates to a proximal end while setting the dose and rotates to a distal end while delivering the dose. The internal cylinder is detachably connected with the dosing scale so that the rotation of the dosing scale about the internal cylinder is blocked while setting the dose, but allowed while delivering the dose. The holder of the piston rod blocks it against travelling to the proximal end while setting the dose, but allows travelling of the piston rod to the distal end while delivering the dose.

EFFECT: invention allows slacking the actuating effort required for drug introduction, particularly for introduction of the large doses with maintaining a compact design to improve a manipulation by the user and gives the aids for intuitively clear, safe and convenient correction of the set dose.

9 cl, 9 dwg

Automatic injector // 2387460

FIELD: medicine.

SUBSTANCE: injector provides the liquid dose release from a needle located on one end of a syringe which is fixed in a case of the injector. The syringe comprises a movable stopper and relocates by a piston after releasing an actuating slide element supplied on one end of the case that ensures the syringe to move from the first position wherein the needle is hidden by the case into the second position wherein the needle projects from the other end of the case. The piston comprises a rod with a longitudinal central flexible projecting piece which is outside of the other end of the syringe until releasing the actuating slide element, and is originally spaced from the stopper so that the primary motion of the piston driven by the actuating slide element provides the projecting piece to fit to said other end of the syringe to move the syringe from said first position into said second position. The following stopping the syringe causes the flexible piece to be compressed and inserted into the syringe to enable the secondary motion the piston into the syringe with contacting and actuating the stopper to compress the liquid in the syringe to be released through the syringe needle. The invention provides advancing the syringe as a single whole to uncover the needle and compress the liquid dose.

EFFECT: prevented leakage of the liquid from the needle before actual injection.

7 cl, 3 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to a dose indicator for a drug administration device which allows the user to specify multiple doses of an injected drug, and for introduction of the preset dose of a drug and application of said drug for the patient, preferentially by injection. The dose indicator for the drug administration device comprises a dose setup limb and a counting ring. The dose setup limb comprises an external thread and external grooves extending from proximal to distal ends. The counting ring is mutually coupled with the external grooves of the dose setup limb, so the counting ring can freely move axially along the external grooves relative to the dose setup limb, herewith being blocked by rotation relative to the dose setup limb.

EFFECT: invention makes it possible to maximise the indication indices and thereby makes them appropriate to be applied by the visually impaired users.

7 cl, 5 dwg

FIELD: medicine.

SUBSTANCE: invention relates to method of assembling devices for delivery of medications, in particular devices for medication delivery of pen type, which have mechanism of dose intake and drive mechanism, which allow to introduce medications from multidose cartridge, and device for delivery of medications, available in accordance with said method. Method of assembling device for medication delivery includes the following steps: providing one-piece case, cartridge, drive mechanism, mechanism of dose intake and on choice mechanism of medication delivery; and insertion or introduction into one-piece case of cartridge, drive mechanism, mechanism of dose intake and on choice mechanism of medication delivery. As a result, cartridge, drive mechanism, mechanism of dose intake and, on choice, mechanism of medication delivery are not connected mechanically with one-piece case.

EFFECT: increase of mechanical and structural stability.

12 cl, 2 ex, 11 dwg

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EFFECT: increased efficiency by preventing setting of dose exceeding amount of liquid remaining in cartridge.

4 cl, 3 dwg

FIELD: medicine, in particular, devices used in injection means.

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EFFECT: increased efficiency and simplified construction.

7 cl, 3 dwg

FIELD: medicine, in particular, preparing of preparation by recovering thereof immediately before usage of solution, suspension or dispersion system suitable for injections.

SUBSTANCE: method involves packaging preparation in inner cavity of cylindrical reservoir closed at one side with injection piston, with displacement of piston in reservoir being blocked; introducing non-liquid part of preparation into cylindrical reservoir from side of injection piston before closing of said reservoir by means of piston. Cylindrical reservoir is formed as pipe or capsule preliminarily closed at other side. Second reservoir of apparatus is contacting with injection needle outlet zone. Blocking mechanism prevents piston from pressing into said reservoir. Distal and proximal cylindrical ampoules are configured so that distal ampoule may be introduced into syringe casing. In blocking position of blocking mechanism, cavity of distal ampoule defines second container.

EFFECT: provision for separate storage of medicinal drugs and mixing thereof immediately before usage.

17 cl, 13 dwg

Disposable syringe // 2261726

FIELD: medicinal equipment, in particular, construction of disposable syringes.

SUBSTANCE: disposable syringe has casing incorporating piston and stem connected to each other through connecting member, and needle with axial channel communicating with casing inner cavity. Connecting member is formed as cylindrical body connected to stem through device enabling rotation thereof with respect to each other. Two detents and skew slot are provided on connecting member. Piston has two projections formed on its rear side so that said projections abut against detents of connecting member, and finger fixed adjacent to one end of skew slot.

EFFECT: simplified construction.

1 dwg

Disposable syringe // 2261727

FIELD: medicinal equipment, in particular, construction of disposable syringes.

SUBSTANCE: disposable syringe has casing incorporating piston and stem connected to each other through connecting member, and needle with axial channel communicating with casing inner cavity. Connecting member is formed of two arcuate flexible plates, each of said plates being equipped with hook-shaped projection bent in rearward direction. Transverse slots provided on front part of casing, on its inner side, are bent in rearward direction.

EFFECT: simplified construction.

1 dwg

Disposable syringe // 2261728

FIELD: medicinal equipment, in particular, construction of disposable syringes.

SUBSTANCE: disposable syringe has casing incorporating piston and stem connected to each other through connecting member, and needle with axial channel communicating with casing inner cavity. Projections are provided on rear side of piston. Connecting member is formed of two leaf springs fixed on stem and separated from one another by inflated ball of elastic material which is placed between springs so that detents provided on their ends protrude beyond stem projections. Sharpened sting is fixed on front side of stem.

EFFECT: increased efficiency by preventing piston from separation from stem during taking-in of preparation.

2 cl, 2 dwg

FIELD: medical equipment.

SUBSTANCE: injection device provides ability of choosing dosage of matter intended for feed and it can be used for medicinal, diagnostic, pharmaceutical and cosmetic applications. Metering tank-equipped injection device has case, piston, piston rod, metering and driving unit and dosage setting member. Case has reservoir for matter to be fed. Piston is made for movement in reservoir in the direction of working stroke to outlet hole of reservoir for feeding matters. Dosing and driving unit is made for performance of metering movement for choosing dosage of matter. The unit implies movement for dosage of matter feeding relatively the case. The unit is engaged with piston rod which provides ability of regulation of piston rod as a driven one during metering movement. It provides ability of feeding movement of metering and driving unit relatively piston rod. Dosage setting member is made for movement along working stroke due to dosing and driving member during feeding movement. The member is engaged with any one from piston rod and case in such a way that it is capable of moving only along working stroke together with piston rod and it is capable of moving relatively piston rod against working stroke at dosing movement. Dosage setting member and driven member are placed one behind the other without overlapping in relation to working stroke. Reservoir module for injection device has front case section of injection device, piston, piston rod and dosage setting member. Front case section of the device has reservoir for matter to be fed and connecting aid for connecting to back case section of injection device. Piston is placed in reservoir for movement along working stroke to outlet hole of reservoir for feeding matter. Piston rod is mounted in front case section for rotation around its longitudinal axis; it has thread. Dosage setting member is connected by thread with piston rod and it is guided by front case section in such a way that at rotational motion of piston rod around its longitudinal axis the dosage setting member is capable of moving against working stroke. Piston rod has connecting part for connecting with metering and driving member of injection device. Connecting part of formed for giving ability of connection between piston rod and metering and driving member of injection device for moving metering and driving member and piston rod relatively each other and for preventing turn of metering and driving member and piston rod relatively each other around longitudinal axis of piston rod.

EFFECT: ability of choosing a dosage; reduced cost; simplified assembling of device at replacement of reservoir module.

14 cl, 22 dwg

Disposable syringe // 2268756

FIELD: medical engineering; medical instrumentation.

SUBSTANCE: proposed disposable syringe has body with rod and piston. Body has hole for receiving needle and bore. Piston has recess which prevents it from escaping from bore.

EFFECT: enhanced reliability.

2 dwg

Disposable syringe // 2270033

FIELD: medical equipment, in particular, disposable syringe with retractable needle and piston.

SUBSTANCE: disposable syringe with retractable needle has syringe casing cooperating with piston and having at least one step, which may be joined with retractable needle. Piston is adapted for engagement with retractable needle for retraction of needle and comprises multiplicity of interconnected slots, which may be slidingly joined with at least one step for rotating said piston, and additionally comprises motion restricting device adapted for restricting sliding motion and preventing syringe from repeated usage.

EFFECT: increased efficiency owing to eliminating the possibility of unintentional infecting contact with needle.

25 cl, 15 dwg

FIELD: medical equipment, in particular, connection for injector consisting of at least two body sections.

SUBSTANCE: injection apparatus has front and rear body sections, piston stem, dose setting member, and dosing and driving device. Front section has reservoir for substance. Piston stem is positioned in at least one of sections for enabling feeding motion to feed selected dose of substance. Dose setting member is positioned for dosing motion relative to piston stem for selecting dose of substance. Dosing and driving device is positioned for rotation around axis of rotation and for progressive motion relative to front section. Upon connecting of sections, said device is joined with piston stem and dose setting member so that rotational motion of said device causes dosing motion of dose setting member, while progressive motion of said device causes feeding motion of piston stem. At least one guide provided on one of sections and at least one catching member provided on other section are adapted to define linear guide upon connection of said body sections. Sections may move one relative to the other to end position of connection without possibility of rotating relative to one another around axis of rotation. At least one catching member is narrowing in axial and, preferably, radial direction at end facing one of sections to facilitate aligning of sections. Reservoir module has front body section of said injection apparatus, piston, dose setting member, and piston stem. Front section has reservoir for substance. Piston is positioned within reservoir for moving in operating stroke direction toward reservoir discharge opening. Dose setting member is disposed in front section for effecting dosing and feeding motions. Piston stem is connected to dose feeding member and held in front section for preventing motion of piston stem in direction opposite to operating stroke direction. Dosing motion does not cause motion of piston stem in operating stroke direction. At least one of axial guide or catching member is provided on front section surface for defining linear guide and, upon connection of sections, for moving of front section on rear section to end position of connection, said sections being fixed from rotation relative to one another. Dose setting member is adapted for detachable engagement with front section in predetermined angular positions. When in engaged position, it is capable of moving in axial and rectilinear directions.

EFFECT: enhanced reliability, improved safety, simplified and convenient usage.

25 cl, 22 dwg

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