SE464665B - Coupling arrangement with built-in ventilation functions, in particular for medical use or laboratory use - Google Patents

Abstract

A coupling arrangement with built-in ventilation functions, in particular for medical use or laboratory use, comprises two matched coupling halves 1, 2 which can be connected to one another and separated from one another, and a valve body 3 arranged movably in one coupling half. Both coupling halves are provided with at least one connection 1g, 1i, 2f and the movable valve body 3 can be adjusted between at least one first position, in which it opens at least one flow path 1h, 3b, 2g between the connections when the coupling halves are connected to one another, and at least one second position, in which it closes said flow path at least when the coupling halves are separated from one another. According to the invention, one coupling half 1 is a male part and the other coupling half 2 is a female part provided with an inner cavity 2c and, arranged centrally therein, a pivot 3g which supports the valve body 3 rotatably. The coupling halves 1, 2 delimit at least one flushing space 2c, 2cl, 3e around the valve body 3 when they are connected to one another and the valve body 3 closes said flow path 1h, 3b, 2g. The flushing space 2c, 2cl, 3e can be cleaned by feeding suitable flushing liquid into one connection 1g of one coupling half 1, through the flushing space 2c, 2cl, 3e and out through a second connection 1k of the same coupling half 1. <IMAGE>

Description

The object of the invention is to provide a connection with valve system, where the above-mentioned limitations are eliminated, and in medical contexts to ensure the flow area, e.g. to take advantage of the normal blood pressure that prevails in the body's circulatory system.

Drawing Description The invention will be explained in more detail below in connection with some special embodiments, which are illustrated in the accompanying drawings.

Figure 1 is a longitudinal sectional view showing a first embodiment of a coupling according to the invention in a position with separated coupling halves.

Figure 2 is a view corresponding to that of Fig. 1, but with the coupling halves brought together to a first coupling position.

Figure 2a is a sectional view according to the section B-B in Fig. 2.

Figure 3 is a view corresponding to that of Fig. 1, but with the coupling halves brought together to a second coupling position.

Figures 3a, 3b and 3c are schematic sectional views according to the section C-C in Fig. 3 and illustrate different relative positions of the valve body of the coupling.

Figure 4 is a view corresponding to that of Fig. 3, but with the coupling halves rotated relative to each other.

Figure 5 is a longitudinal sectional view showing a second embodiment of a coupling according to the invention.

Figure 6 is a longitudinal sectional view showing a third embodiment of a coupling according to the invention in a first position with separated coupling halves.

Figures 7 and 8 are views corresponding to Fig. 6, but with the coupling halves brought together in a first resp. second switching mode.

Figures 9 and 10 are schematic sections according to A-A in Fig. 7.

Figures 11 and 12 are longitudinal sectional views of some further embodiments of one coupling half in a coupling according to the invention.

In the embodiment illustrated in Figs. 1-4, the coupling device according to the invention essentially comprises a first coupling half 1, a corresponding second coupling half 2 and valve body 3 movably arranged therein. The coupling half 1 is designed as a male and the coupling half 2 as a corresponding female. The handle 1 is provided with two hose connections 1g and 1i and the female part 2 has a hose connection 2f. Through the hose connections lg, li and 2f flow channels lh, lk resp. 2g. In the valve body 3 there is a continuous flow channel 3b. The channels lh, lk, 2f and 3b are arranged parallel to the axis of symmetry 4 of the coupling and at the same distance from it.

The valve body 3, which is located in the inner cavity 2c of the female part 2, is rotatably arranged in the space 2c by means of a central pivot pin Bg. This pin passes 10 15 20 25 30 35 3 464 665- through the end wall of the female part 2 and is provided on the outside with a retaining thickening Ba. An O-ring 2h seals between the underside of the valve body 3 and a flushing space 2cl. Furthermore, there is an O-ring 2e, which seals between the valve body Ba and the cylindrical inner surface of the female part wall 2d. The valve body has a lower sealing surface Bf and further a flushing channel Be.

The coupling halves 2, B are designed so that they can assume two different coupling positions, in which the handle 1 is inserted differently into the female part 2. For this purpose, the wall Zd of the female part is provided with an outwardly directed cam 2b, which cooperates with first and second ring grooves 1b resp. lb2 occupied in the trade 1 outer wall lb. The part 1 has a tubular extension 1d of the flow channel 1h and also a carrier pin 1c. The female part 2 is provided with a first recess Bc, intended to receive the extension ld, and with a second recess Bd, intended to receive the carrier pin lc. The driver pin 1c is positioned asymmetrically in relation to the center line 1h, lk of the channels.

In the position shown in Fig. 1, the coupling halves 1, 2 are disassembled and the valve body 2 closes the flow channel 2g, which is thereby kept closed.

Fig. 2 shows the coupling halves 1, 2 brought together in a first coupling position, in which the crack 2b is inserted into the outer ring groove 1b1 of the trade 1, the driver pin 1c engages in the cylindrical recess Bd of the valve 2 and the sealing ring 1e of the trade 1 against the cylindrical wall 2d of the female part. In this position, the inflow channel 1h communicates with the outflow channel 1k through the cylindrical space 2c, the flow channel Bb, Bc and the flushing space formed by the spaces 2cl and Be.

The first part of the flushing / cleaning is carried out in this position by pumping suitable flushing liquid into the channel 1h, through said spaces and out through the outlet lk.

Fig. B shows the coupling halves brought together in a second coupling position, in which the crack 2b is inserted into the inner ring groove 1b2 of the trade 1 and the connecting pipe 1d is inserted into the valve body recess Bc. The coupling halves 1, 2 are rotated 120 ° relative to each other, whereby the carrier pin 1c also rotates the valve body B 120 °. The part of the sealing surface Bf of the valve body, which in the previous position closed off the flow channel 2g (cf. Fig. Ba), will now be above the flushing space 2cl (cf. Fig.

Bb), and can therefore also be flushed / cleaned by feeding flushing liquid through the flow paths lh and Bb and the spaces 2c, 2cl and Be.

Fig. 1: shows the coupling halves 1, 2 after they have been rotated a further 120 ° relative to each other in the same direction as before. In this position (which is also illustrated in Fig. Bc) the flow channels 1h and 2, the flow channels 1h resp. 2g in full connection with each other via the flow channel Bb of the valve element 3. Remaining 464 10 15 20 25 30 35 665 * ß rinsing liquid can be evacuated by suction if necessary. In the embodiment shown in Fig. 5, the coupling device according to the invention comprises two female parts 2 and an intermediate part 20 designed as a double trade with common channels. The traders each have two connections 2f and 2h with corresponding flow channels 2g and 2i. The design and function are essentially the same as in the embodiment according to Figs. 1-1, but the four-way coupling allows for a number of variations as both valves can be switched off separately, can be disassembled with retained function and can also be replaced. As an example of medical use of the four-way coupling can be mentioned use in drainage of wounds, blood vessels, bladder, bile ducts, etc. The coupling especially shown in Fig. 5 provides the possibility of simultaneous closure of catheter outlet and drainage vessels. This coupling can also be used for e.g. flushing in a closed circuit and then being disassembled with closed flow channels, which can then be connected to other flow paths, e.g. from dialysis machine, patient, infusion needles, etc. The device also provides the possibility of cross-flow after two coupling parts have been separated from each other to the external coupling position.

In the embodiment shown in Figs. 6-10, the coupling according to the invention forms a double valve system and essentially comprises a trade / connection part 1, a female part / valve housing 3 with flow channels 2f and 2h and a bottom plate 4, a valve body 2 with two flow channels symmetrically placed in relation to a throttle valve 5 arranged in a flow channel 3g, 3gl. As in the previously described embodiment, the coupling halves 1, 3 are arranged to be able to assume two different coupling positions (Fig. 7 and Fig. 8, respectively). For this purpose, the valve housing wall 3a has an outwardly directed cam 3d intended to co-operate with outer and inner semicircular grooves 1bl and 1b, respectively. lb2 occupied in the outer wall lb of the trade.

The trade 1 is further provided with a carrier pin Id, which is arranged to be inserted into the corresponding cylindrical recesses 2ij in the valve body 2a. This in turn is enclosed in the cylindrical space 3c of the valve housing 3, where it is stored and centered with the shaft of the damper 5 through a center hole in the bottom plate 4.

The valve body 2 can assume certain positions (position indication / locking by snap action) as illustrated in Fig. 10 by 2b and 3b. It can be noted here that position indication and locking in the embodiment according to Figs. 1-1 are based on the same principle as in Fig. 10, but with 120 ° division for the three different positions, and with limit positions which prevent incorrect handling.

Sealing between the bottom plate 11 and the wall 3a of the valve housing is provided by a high surface finish and press fit between the components, the valve housing 3 and the bottom plate 4, at the sealing surface 3e. An O-ring 2d seals between the valve body 2a 10 l5 20 25 30 35 464.665 5 and the inside of the valve housing wall 3a. The seal 2i in the valve housing seals against the bearing surfaces of the handle 1a in the internal coupling position (Fig. 8). As in the previously described embodiment, an O-ring lf of the trade 1 seals against the inside of the valve housing wall Ba. A cylindrical round spring lock 2c, which is arranged in the corresponding spring seats in the wall 3a and the valve body 2a, fixes the valve body in the cylindrical space 3c of the valve housing. By relative displacement of the spring seats, the spring lock 2c exerts a force directed towards the sealing surface 2e of the bottom plate 4 and secures the seal between the valve body 2a and the bottom plate 4. The damper 5 with shaft has a cylindrical and an angular (especially square) part, the angular part serves as a carrier. A tip bearing in the wall, the front channels 3g, 3gl, opposite the damper shaft, acts as a pivot bearing support for a pointed bearing part of the damper.

Figure 6 shows the coupling device with the trade I separated from the valve housing 3, the damper valve 5 being in the closed position and the valve body 2 being in the position-oriented and locked position with the valve open.

In Fig. 7, the trade 1 has been merged with the valve housing 3 in the outer carrier pin 1d is inserted into the cylindrical recess 2j of the valve body. The handle 1 is rotated 90 °, the valve body 2a closing the flow channels 2f and 2h. At the same time, the damper 5 is rotated and opens the connection between the flow channels 3g and 3g1. In this case, the coupling position, with the crank 3d, can engage in the outer ring groove lbl. to perform cleaning by flushing the flow channels lc, le, 2f and 2h.

Fig. 8 shows the trade 1 in the internal coupling position on the valve housing 3, i.e. with the crackle 3d in engagement with the inner track of the trade lb2. The connection between the flow channels 3g and 3gl is here closed with the damper 5, while the flow channels le, 2h and 3g communicate with each other, as well as the flow channels lc, 2f and 3gl.

Fig. 9 shows a section according to A-A in Fig. 7 through the valve housing 3a with the damper 5 open and the valve closed. The carrier holes 2j are shown asymmetrically placed, which prevents the coupling from taking place incorrectly.

As mentioned above, Fig. 10 shows an analogous section through the valve housing 3a, which illustrates position indication and locking in position with open damper 5 and closed valve.

The embodiment according to Figs. 6-10 is particularly suitable for use in access to veins or arteries or other vessels for body fluids. The female part 3 with the channels 3g, 3gl is then intended to be implanted subcutaneously, whereby the connections 3f, 3fl connect with veins, arteries, etc. The female part can then advantageously be provided with a suitable collar of biocompatible material, on which skin can grow firmly. When the damper 5 is open and the valve 2 is closed, e.g. blood flow directly from channel 3gl to channel 3g. When the damper 5 is closed, the blood, driven by the heart only, can be pumped out through the open flow channel 3f, 1c to any suitable external treatment station, e.g. a dialysis machine, and from there is returned via the flow channel le, 2h. After treatment, the coupling can be reset to the aforementioned position. The handle 1 can be replaced with a lid 7 or 7a (see Figs. 11 and 12), which has no connections, but can be provided with penetrable membranes 8, such as e.g. provides the opportunity for the introduction of disinfectant rinsing liquids. The cover 7, 7a is applicable to the second coupling half 2, 3 when the flow paths are blocked with the valve housing 3 in the damper open-valve position closed.

In all the embodiments described above, the entrance inputs of the grooves 1b1 and 1b2 cooperating with the crackers are preferably slightly offset in relation to the position indication and the reading for resp. ventiikropp. In the embodiment according to Figs. 1-5, the coupling is preferably not detachable at full flow communication between the flow paths 1h, 3b and Zg.

The invention is of course not limited to the embodiments specifically described above and shown in the drawings, but many variations and modifications are possible within the scope of the general inventive concept.

Claims (8)

10 15 20 25 30 35 464 665 '7 P A T E N T K R A V Coupling device with built-in valve functions, especially for medical or laboratory use, comprising two matching coupling halves (1,2), which can be connected to each other and separated from each other, and a valve body movably arranged in one coupling half (3) , each coupling half being provided with at least one connection (1g, 1i; 2f) and wherein the movable valve body (3) is adjustable between at least a first position, in which it opens at least one flow path (1h, 3b, 2g) between the connections when coupling the halves are connected to each other, and at least a second position, in which it blocks said flow path at least when the coupling halves are separated from each other, characterized in that one coupling half (1) is designed as a male and the other coupling half (2) which a female provided with an inner cavity (2c) and a pivot pin (3g) arranged centrally therein, which rotatably supports the valve body (3), and that the coupling halves (1,2) delimit at least one flushing space (2c, 2cl, 3e) around the valve body (3) when connected to each other and the valve body. (3) blocks said flow path (1h, 3b, 2g); which flushing space (2c, 2cl, 3e) can be cleaned by feeding suitable flushing liquid into a connection (lg) of one coupling half (1), through the flushing space (2c, 2cl, 3e) and out through a second connection (lk) of same coupling half (1). Coupling device according to claim 1, characterized in that said flushing space comprises a space (2c1) accommodated in the bottom of the female part (2) and a channel (3e), which passes through the valve body (3) and opens into said space (2cl). ). ' Coupling device according to claim 1 or 2, characterized in that the male-shaped coupling half (1) is provided with operating means (1c), which at least when the coupling halves (1, 2) are connected to each other can cooperate with matching means ( 3d) of the valve body (3) for rotating it about said pivot pin (3g). 464 665 8 10 15 20 25 30 35 Coupling device according to claim 1, 2 or 3, characterized in that the coupling halves (1,2) comprise means (1b1, lb2,2b), by means of which they can be coupled to each other to at least two different coupling positions, in which the trade ( 1) are differently inserted into the female part (2). Coupling device according to claim 1, 2, 3 or 4, characterized by the vent body (3) can be rotated about its pivot pin (2g) between three distinct positions, preferably at 120 ° angular intervals, said flow path between the coupling halves (1, 2) connections (1h, 1k; 2g) are open in one of said positions but blocked in the other two positions, and said rinsing space is available for supplying and discharging rinsing liquid through the connections of one coupling half in at least the two blocked positions. Coupling device with built-in valve functions, especially for medical or laboratory use, comprising two coupling halves (2) designed as female parts and an intermediate part 120) connectable between the female parts, designed as a double trade with common flow channels, each female part being provided with at least one connection (2g, 2h) and can be connected to and separated from the respective trade of the intermediate part (20), characterized in that each female part (2), which preferably comprises two connections (2f, 2h), is provided with an inner cavity ( 2c) and a centrally arranged pivot pin (3g), which rotatably supports a valve body (Å), which is adjustable between at least a first position, in which it opens at least one flow path between one of the connections of the female part and one of the flow channels of the trade when the female part is connected to the intermediate part, and at least a second position, in which it blocks said flow path at least when the female part is separated from the trade, and that at least one flushing space is delimited around the valve body (3) when its corresponding female part is connected to resp. trade of the intermediate part (20) and said flow path is blocked, so that said flushing space can be cleaned by feeding suitable flushing liquid into one of said connections, through the flushing space and out through a second connection. 10 15 20 25 30 35 ~ 9 464 ses " Coupling device with built-in valve functions, in particular for medical or laboratory use, comprising two matching coupling halves (1, 2), which can be connected to each other and separated from each other, and a valve body movably arranged in one coupling half (3) , each coupling half being provided with at least one connection (1h, li; - 3f, 3f1) and wherein the movable valve body (3) is adjustable between at least a first position, in which it opens at least one flow path (1c, 1e, 2f, 2h) between the connections when the coupling halves are connected to each other, and at least a second position, in which it blocks said flow path at least when the coupling halves are separated from each other, characterized in that one coupling half (1 ) is designed as a male and the second coupling half (2) as a female provided with an inner hollow body (2c), in which the valve body (3) is rotatably mounted about a central axis (2g, S), that the coupling halves (1,2) avg clears at least one flushing space (2f, 2h) when connected to each other and the valve body (3) blocks said flow path (1h, 3b, 2g), that the female part comprises a flow channel (3g, 3gl) substantially perpendicular to the longitudinal axis (6g) of the coupling device. ), that the valve body has two continuous flow channels (2f, 2h) placed symmetrically in relation to a throttle valve (5) arranged in said flow channel (3g, 3gl), which by turning the valve body can open resp. close the female part's flow channel (3g, 3gl) during simultaneous closing resp. opening of the continuous flow channels (2f, 2h) in the valve body, so that the latter become available for cleaning by flushing via the commercial connections (1c, 1e). g Coupling device according to claim 7, characterized in that the trade is provided with a central driver pin (ld), which is arranged to effect said rotation of the valve body by engagement with a corresponding recess (2j) of the valve body.