前苏联专利SU1082305A3 Sirynge

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专利附录

专利说明

权利要求

类似技术

同族专利

引用文献

法律状态

优先权

专利摘要:
The invention relates to a disposable syringe which is not able to be used more than once for carrying out an injection. To this end, the syringe comprises means which permit the rearward return of at least a part of the piston body to be prevented when the said body occupies a position close to its position of maximum insertion in the cylinder. These means can, for example, be formed by a circular groove, in which can be engaged a peripheral rim of a resilient member integral with the body of the piston, thus causing the blocking of the said body. Applications are particularly in human and veterinary medicines.
公开号:SU1082305A3
申请号:SU792736102
申请日:1979-03-07
公开日:1984-03-23
发明作者:Стэмфли Жакки
申请人:Тюльсеа Са Лихтенштейн (Фирма)；
IPC主号:

专利说明:

2. Syringe POPG 1, characterized in that the elastic element has an annular rib.
3 "Shffic on p. 1, characterized in that the rod has a protrusion made in the shape of a truncated cone, and the piston has a groove of a similar shape for the protrusion "
4, Syringe popp. 1 and 2, characterized in that the rod has a protrusion formed by a truncated cone, turning into a thickening, and the piston - a notch of similar shape with a shoulder for fastening the thickened part.
5. The syringe according to claim 1, I differ by the fact that the elastic element is designed as a gasket.
6. A syringe according to claim 1, characterized in that the elastic element is designed as a cap covering the lower part of the piston, the periphery of which has a thickening in the form of a toroid.
7. A syringe according to claim 1, characterized in that it is provided with a stop mounted on the piston rod to prevent the rod from moving inside the body.
The invention relates to devices for administration, namely to syringes, in particular, used for only one injection. A syringe is known which is used for one injection, containing an ampoule with a piston and a gasket separating from the duster and remaining at the bottom of the cylinder of the ampoule after the injection is made lj. In this syringe, you can remove the gasket and reuse the syringe. A syringe is known, comprising a housing within which a piston with a rod is located and a device for blocking the stroke of the piston 2j. However, since this device is outside the cylinder, it can be removed or worn out, as a result of which the syringe can be reused. The aim of the invention is to exclude the use of syringe reuse. Dp achieve the goal in the syringe, comprising a housing inside which there is a piston with a rod and a device for blocking the stroke of the piston, a device for blocking the stroke of the piston is made in the form of at least one elastic element mounted on the piston, and the housing has at least one annular groove for entry into non element. The elastic element may have an annular edge. It is advisable to perform the rod with a protrusion in the shape of a truncated cone, and the piston with a notch of a similar form for the protrusion to enter into it. The rod may have a protrusion formed by a truncated cone, turning into a thickening, and the piston - a groove of a similar shape with a shoulder for fastening the thickened part. The elastic element can be made in the form of a gasket. The elastic element is advisable to be in the form of a cap covering the lower part of the piston, the periphery of which has a thickening in the shape of a toroid. The syringe can be equipped with an abutment mounted on the piston rod to prevent the rod from moving inside the body. FIG. 1 shows a syringe (position of the piston before injection); in fig. 2 - the same, after an injection; in fig. 3 shows section A-A in FIG. 2; in fig. 4 - the second version of the syringe (the position of the piston before injection); in fig. 5 - the same, after an injection; in fig. 6 - the third variant of syringe injection (position before injection); in fig. 7 - the same, after an injection; in fig. 8 - the fourth embodiment of the syringe (friction position before injection); in fig. 9 - the same, after an injection; in fig. 10 - syringe with a removable stop. The syringe (Figs. 1 and 2) contains a cylinder 1 with a cannula 2, a piston 3 and a rod 4 with a flange 5, the rod has a protrusion 6, and the piston has a notch 7 of the same shape for the protrusion 6 to enter it. The cylinder 1 has a blocked device 9, has a flange 8. The protrusion 6 has the shape of a truncated cone. In order to ensure sufficient tightness, the piston 3 should be made of an elastic material, preferably plastic. The free end of the piston 3 has an elastic element 10 with an edge 11. FIG. 3, it can be seen that element 10 consists of five sectors separated from one another by slits. Since the element 10 is elastic, the edge 11 tends to press against the inner wall of the cylinder 1, which is facilitated by the division of the element into sectors. It goes without saying that the number of sectors may be different, and in order for rib 11 to press against the inner wall of cylinder 1, dividing element 10 into sec tori is not a necessary condition. On the inner wall of cylinder 1 there is an annular groove 12, perpendicular to the axis of cylinder 1. Typically, the groove 12 has the shape of a truncated cone, and the apex of this cone is directed toward the canopy 2. On the other side, the groove 12 has such a shape and is positioned so that the maximum movement of the piston 3 inside the cylinder 1, the edge 11 of the electric element enters the groove 12, continuing to abut against the wall of the cylinder 1, as a result of which the version of the element increases. The edge 13 of the groove 12, located opposite the end of the cylinder 1 with the cannula 2, is sufficiently hard that after the edge 11 of the element enters the groove 12, this edge 11 is blocked by the edge 13 of the groove when trying to move the piston 3 back. The groove 14 has a shape similar to that of the groove 12 and extends from near the upper end of the cy054 lindra 1. This groove 14 is designed to block the edge 11 of the element 10 to make it impossible to attempt to disassemble the syringe before using it. The groove 14 prevents attempts to remove the rib 11 of the elastic element 10 prior to using the syringe in order to be able to use the syringe multiple times. The syringe (FIGS. 4 and 5) consists of a cylinder 1 with a cannula 2 of the piston 3 and a rod 4. The piston 3 has a sealing element 14 of a toroidal shape. When the syringe is ready for use, the element 14 is on the piston 3, where it is slightly clamped between the inner wall of the cylinder and the annular groove 15 that is filled in the piston 15. In this position, the elastic element has a slightly flattened shape. In the lower part of cylinder 1 there is an annular groove 16 perpendicular to the axis of cylinder 1. This groove has an annular shape, and its radius is such that the toroidal element 14 can freely enter this groove. The groove 16 is located at the bottom of the tststindra 1 in such a position that with the full movement of the piston 3 into the cylinder 1, the elastic element enters the groove 16, taking its original toroidal shape. In this position, the element 14 is barely held in the annular groove 15 on the piston and when trying to stretch it flies off the piston and remains in the groove 16 (Fig. 5). The syringe (figs. 6 and 7) consists of a cylinder 1 with a cannula 2, a piston 3 and a rod 4. The rod 4 of the piston 3 has a protrusion 6 made in the shape of a truncated cone, which with force enters the recess 7 of the corresponding shape. One end of the piston has an elastic element 10 with an edge 11, which tends to rest against the inner wall of cylinder 1. When the syringe is ready for use (Fig. 6), the elastic sealing cap 17, which has a toroidal shape, is fixed to the piston in the groove 18, filled in the lower part of the piston 3. In the lower part of the cylinder 1 there is an annular groove 19 into which the elastic element 10 can enter, as a result of which the piston is locked in a position close to the position of the maximum piston advance into the cylinder, which allows init rod A and piston 3 tsilivdra 1 At the bottom there is also an annular groove 20, allowing the cap 17 to hold the guide and be separated, it from the piston 3 (FIG. 7). The syringe (Fig. 8 and 9) consists of a cylinder 1 with a cannula 2, a piston 3 and a rod 4. On the piston 3 there is a cap 21, and the piston is a piece of elastic material, made in the shape of a truncated cone. 3 of its upper part there is an elastic rib 22 abutting against the inner wall of the cylinder 1. In this element there is a notch 23, in the upper part of which there is a shoulder 24 and at least one longitudinal slot 25 extending from the outer surface of the element to notches 26. At the lower end of the piston rod 4 there is a protrusion 27 in the shape of a truncated cone, in the middle part of which there is a thickening 28. The shape and dimensions of the protrusion 27, as well as the shape and dimensions of the piston notch, are such that prior to blocking the piston in the cylinder 1, the protrusion 27 rod 4 piston holds with in the recess e 26. When the elastic rib 22 of the piston enters the groove 12, the upper part of the recess 23 of the piston 3 expands, as a result of which the thickening 28 of the protrusion 27 ceases to be held by the flange 24. Thus, the rod 4 can be separated from the piston 3s especially since the shoulder 24 , resting against the edge of the groove 12, prevents the piston 3 from being pulled out of its lowest position in the cylinder 1. When the syringe is ready for use (Fig. 8), the cap 2 is fixed to the piston 3, since its toroidal part 29 is included in ring bore 30, made in the lower part of the piston 3, and up It is in the inner wall of the cylinder 1. Besides the annular groove 12 in its audio portion of the cylinder 1 there is also an annular groove 31, the shape and the pur- pose which are similar in shape and grooves 16 and their assignment in the constructions of the syringe 2U ijjHH, shown in FIG. 4 - 7. Thus, the groove 31 holds the cap 21, separating it from the piston. The safety device shown in FIG. 10 consists essentially of a disc 32 and a locking pin 33. This device is securely removable from the piston rod 4 and can be made of plastic. The disk 32 allows the piston rod 4 to be pulled out when the syringe is filled with liquid or injection. In order to make an injection after filling the syringe and removing air from it, it suffices to remove the disk 32 and the pin 33 from the piston rod 4. The proposed syringe operates as follows. At the time of first use of the syringe, the piston is in the position shown in FIG. 1. The syringe is filled as it is done, i.e. by sucking in a liquid as a result of the piston moving up and in the direction indicated by arrow B (Fig. 1). Then, the air there is drawn out of the cylinder by moving the piston inside the cylinder in the direction indicated by arrow B, i, and the pre-syringe is turned in such a way that the cannula 2 is upward. Due to the presence of the safety device, the piston cannot be blocked during the filling of the syringe even in the case when the filling is carried out in two directions (in the direction of arrow B for suction of liquid and in the direction of arrow B for removing air). It is only at the very moment of the injection that the safety device is removed either by breaking it, or by tearing off its end fixed on the flange 8, as a result of which it becomes possible to insert the piston into the cylinder against the stop. After injection, the piston is in the lowest position (Fig. 2), with the edge 11 of the elastic element 10 entering the groove 12. When trying to reuse the syringe by pulling the piston rod 4, it is necessary to collect a new piston
the dose of fluid for injection, the rib 11 of the element 10 abuts against the edge 13 of the groove 12 and prevents the piston from returning to its original position. When trying to unlock the rib 11, the conical protrusion of the rod 4 is separated from the piston 3 ,. exit from the notch 7.
In the syringe (Figs. 4 and 5), when an attempt is made to reuse the syringe, element 14 flies off the piston and remains in the groove 16.
In the syringe (Fig. 6 and 7) the groove 20; holds cap 17 and does not allow reuse of the syringe after the production of one injection, as well as in the case of the second variant of the proposed syringe.
In the syringe (Figs. 8 and 9), the groove 31 holds the cap 21, separates it from the piston, and the cap 21 pops out of the groove 30 (Fig. 9) if re-use attempts are made.
Thus, re-using a syringe after production
the first injection is not possible before, because when trying to pull the piston out of the cylinder, the tightness of the piston is completely broken, and also because
after the first injection, the piston body is blocked, and finally, due to the separation of the rod 4 and the piston 3. The last two measures can only be considered as additional precautionary measures that complement the breach of the piston.
The spontaneous movement of the pistons before the use of the syringe for injection is impossible due to the presence of the safety device.
W
FIG. 2
Fig.Z
/
f15W / 6

FIG.
5
6
Fi.7
FIG. eight
Fig.Yu
fig.c

权利要求:
Claims (7)
[1]
1. A SYRINGE containing a housing, inside of which a piston with a rod and a device for blocking the stroke of the piston are located, characterized in that, in order to prevent reuse of the syringe, the device for blocking the stroke of the syringe is made in the form of at least one elastic element mounted on the piston, and the housing has at least one annular groove for the entry of an element into it.
Figure 1
SI
[2]
2. A syringe according to Claim. Characterized in that the elastic element has an annular rib.
[3]
3. The syringe according to π. 1, characterized in that the rod has a protrusion made in the form of a truncated cone, and the piston has a recess of a similar shape to enter the protrusion.
[4]
4. Syringe popp. 1 and 2, characterized in that the rod has a protrusion formed by a truncated cone, turning into a thickening, and the piston has a recess of a similar shape with a shoulder for fastening the thickened part.
[5]
5. Syringe pop. 1, with the fact that the elastic element is made in the form of a gasket.
[6]
6. Syringe pop. 1, characterized in that the elastic element is made in the form of a cap covering the lower part of the piston, the periphery of which has a thickening in the shape of a toroid.
[7]
7. Syringe pop. 1, characterized in that it is equipped with a stop mounted on the piston rod to prevent the rod from moving inside the housing.

类似技术:

公开号 | 公开日 | 专利标题

SU1082305A3|1984-03-23|Sirynge

US3089490A|1963-05-14|Disposable cartridge type hypodermic syringes

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US4838869A|1989-06-13|Retractable needle syringe

ES2312054T3|2009-02-16|RETRACTILE MEDICAL DEVICE OPERATED BY COVER.

RU2067004C1|1996-09-27|Device for injections

JP2739603B2|1998-04-15|Syringes, especially medical syringes

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US5188599A|1993-02-23|Retractable needle system

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US6120479A|2000-09-19|Auto-destruct disposable syringe

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同族专利:

公开号 | 公开日

ES247146U|1981-11-01|

US4391272A|1983-07-05|

NL7901872A|1979-09-12|

SE438598B|1985-04-29|

ATA175379A|1981-10-15|

GB2015883B|1982-07-21|

CH620126A5|1980-11-14|

NL184874C|1989-12-01|

HK64187A|1987-09-11|

JPS6222634B2|1987-05-19|

GB2015883A|1979-09-19|

DE2909002C3|1982-02-18|

ZA791069B|1980-03-26|

IT1165170B|1987-04-22|

BE874689A|1979-07-02|

CA1144838A|1983-04-19|

SE7902138L|1979-09-11|

FR2419074A1|1979-10-05|

FR2419074B1|1984-06-22|

JPS54129793A|1979-10-08|

DE2909002B2|1981-06-19|

ES247146Y|1982-04-16|

AT366915B|1982-05-25|

IT7967484D0|1979-03-07|

DE2909002A1|1979-09-20|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

CH262478A|CH620126A5|1978-03-10|1978-03-10|

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