Coupling device

Abstract

A coupling device (100) for transferring a fluid is provided. The coupling device comprises a first housing (110), a tube portion (140) projecting into the first housing, and a second housing (200) displaceably arranged within the first housing. The coupling device further comprises a third housing (300) releasably connectable to the second housing and displaceably arranged within the first housing when connected to the second housing. In a first position of the second housing, the first and second channels constitute a passage which is sealed by the first and second sealing elements when the second housing and the third housing are connected. In a second position, the tube portion projects through the first and second sealing elements and into the sealed passage for enabling a transfer of fluid through the coupling device.

Claims

1. A coupling device for transferring a fluid, the coupling device comprising: a first housing extending along a principal axis, the first housing comprising a first opening at a back end portion thereof, a second opening at a front end portion thereof, and a tube portion extending from the first opening into the first housing; a second housing displaceably arranged within the first housing along the principal axis between a first position at the front end portion of the first housing and a second position at the back end portion of the first housing, the second housing comprising a first sealing element; and a third housing releasably connectable to the second housing and configured for displaceable arrangement within the first housing along the principal axis, the third housing comprising a channel through the third housing, and a second sealing element arranged to seal the channel, whereby, in the first position of the second housing, the third housing is insertable into the first housing via the second opening thereof, and insertable between the first housing and the first sealing element, such that the first and second sealing elements are configured to abut each other and sealingly separate the tube portion and the channel, and whereby, in the second position of the second housing, the third housing and the second housing are connected and the tube portion projects through the first and second sealing elements for connection with the channel such that a transfer of fluid through the coupling device is enabled.

2. The coupling device according to claim 1, further comprising a locking arrangement, whereby the second housing, in the second position, is releasably connected to the first housing via the locking arrangement.

3. The coupling device according to claim 1, wherein when a force (F) applied on the third housing connected to the second housing in the second position along the principal axis towards the first position exceeds a predetermined threshold: the second housing is configured to be released from a connection to the first housing in the second position, the second housing is configured to be displaced from the second position into the first position, and the third housing is configured to be released from a connection to the second housing.

4. The coupling device according to claim 1, further comprising a locking mechanism configured to releasably connect the third housing to the second housing.

5. The coupling device according to claim 4, whereby, in the second position of the second housing, the third housing and the second housing are connected by the locking mechanism.

6. The coupling device of claim 4, wherein the third housing comprises a first locking element of the locking mechanism, and the second housing comprises a second locking element of the locking mechanism, wherein the first and second locking elements are configured to releasably lock upon rotation of the first and second locking elements with respect to each other.

7. The coupling device of claim 6, wherein, during a displacement of the second housing and third housing from the first position to the second position, the second locking element is configured to rotate with respect to the first locking element for mating engagement with the first locking element such that the third housing and the second housing are connected in the second position, and during a displacement of the second housing and third housing from the second position to the first position, the second locking element is configured to rotate with respect to the first locking element for disengaging the mating engagement such that the third housing and the second housing are disconnected in the first position.

8. The coupling device according to claim 1, wherein at least one of the first and second sealing elements comprises a resilient membrane.

9. The coupling device according to claim 8, wherein the resilient membrane has a convex shape which is configured to flatten upon abutment of the first sealing element with the second sealing element.

10. The coupling device according to claim 8, wherein the resilient membrane comprises silicone.

11. The coupling device according to claim 1, further comprising an alarm arrangement configured to generate an alarm when the second housing and the third housing are disconnected.

12. The coupling device according to claim 11, wherein the alarm comprises at least one of a visual alarm or an audible alarm.

13. The coupling device according to claim 1, wherein the coupling device is configured to generate a tactile feedback to an operator when the second housing is in the second position.

14. A medical tube for transferring a fluid to or from a patient, wherein the medical tube comprises: at least one coupling device comprising: a first housing extending along a principal axis, the first housing comprising a first opening at a back end portion thereof, a second opening at a front end portion thereof, and a tube portion extending from the first opening into the first housing; a second housing displaceably arranged within the first housing along the principal axis between a first position at the front end portion of the first housing and a second position at the back end portion of the first housing, the second housing comprising a first sealing element; and a third housing releasably connectable to the second housing and configured for displaceable arrangement within the first housing along the principal axis, the third housing comprising a channel through the third housing, and a second sealing element arranged to seal the channel, whereby, in the first position of the second housing, the third housing is insertable into the first housing via the second opening thereof, and insertable between the first housing and the first sealing element, such that the first and second sealing elements are configured to abut each other and sealingly separate the tube portion and the channel, and whereby, in the second position of the second housing, the third housing and the second housing are connected and the tube portion projects through the first and second sealing elements for connection with the channel such that a transfer of the fluid through the at least one coupling device is enabled.

15. A medical kit, comprising: at least one medical tube comprising: at least one coupling device comprising: a first housing extending along a principal axis, the first housing comprising a first opening at a back end portion thereof, a second opening at a front end portion thereof, and a tube portion extending from the first opening into the first housing: a second housing displaceably arranged within the first housing along the principal axis between a first position at the front end portion of the first housing and a second position at the back end portion of the first housing, the second housing comprising a first sealing element; and a third housing releasably connectable to the second housing and configured for displaceable arrangement within the first housing along the principal axis, the third housing comprising a channel through the third housing, and a second sealing element arranged to seal the channel, whereby, in the first position of the second housing, the third housing is insertable into the first housing via the second opening thereof, and insertable between the first housing and the first sealing element, such that the first and second sealing elements are configured to abut each other and sealingly separate the tube portion and the channel, and whereby, in the second position of the second housing, the third housing and the second housing are connected and the tube portion projects through the first and second sealing elements for connection with the channel such that a transfer of fluid through the at least one coupling device is enabled, at least one coupling arrangement provided at at least one end of the at least one medical tube, and at least one element connected to the medical tube via the at least one coupling arrangement.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) This and other aspects of the present invention will now be described in more detail, with reference to the appended drawings showing embodiment(s) of the invention.

(2) FIGS. 1a-b are schematic views of a coupling device according to an exemplifying embodiment of the present invention,

(3) FIGS. 2a-d are schematic, cross-sectional views of a coupling device according to an exemplifying embodiment of the present invention,

(4) FIGS. 3a-b schematically shows locking and unlocking operations of a coupling device according to exemplifying embodiments of the present invention,

(5) FIG. 4 schematically shows a disconnection of the coupling device, and

(6) FIG. 5 shows a schematic view of a medical kit according to an embodiment of the present invention.

DETAILED DESCRIPTION

(7) FIGS. 1a-b are schematic views of a coupling device 100 according to an exemplifying embodiment of the present invention. It will be appreciated that FIGS. 1a-b are provided for an initial description of the coupling device 100, and that a more detailed description of the properties and operation of the coupling device 100 is provided in the following figures and associated text.

(8) The coupling device 100 is provided for the transfer of a fluid P through the coupling device 100 when the coupling device 100 is in its connected state. In FIG. 1a, a connection of the coupling device 100 has been initiated, which will be described in more detail in the following text and associated figures. In FIG. 1b, a disconnection of the coupling device 100 has been initiated. Eventually, the coupling device 100 becomes disconnected (detached), whereby the transfer of fluid through the coupling device 100 is interrupted.

(9) FIGS. 2a-d are schematic, cross-sectional views of a coupling device 100 according to an exemplifying embodiment of the present invention. It will be appreciated that the four FIGS. 2a-d disclose exemplifying and momentary positions of a connection of a coupling device 100 for an increased understanding of the operation of the coupling device 100. Hence, an analogous disconnection of the coupling device 100 may be anticipated by the reverse order of the figures, and is therefore not presented in more detail.

(10) FIG. 2a is a schematic view of a coupling device 100 for transferring a fluid, wherein the coupling device 100 is shown in a disconnected state. The coupling device 100 comprises a cylinder-shaped first housing 110 with an elliptic cross-section, wherein the first housing 110 extends along a principal axis A. The first housing 110 comprises a first opening 120 at a central portion of the back end portion (e.g. a bottom part) of the first housing 110, and a second opening 130 at the front end portion of the first housing 110. The coupling device 100 further comprises a tube portion 140 which extends from the first opening 120 of the first housing 110 into the interior of the first housing 110. The end of the tube portion 140 which point towards the interior of the first housing 110 may be formed to be sharp or pointed, and the end of the tube portion 140 exemplified in FIG. 2a is beveled. However, the end of the tube portion 140 may alternatively be straight, i.e. without any sharp or pointed end.

(11) The coupling device 100 further comprises a second housing 200 which is enclosed by the first housing 110 and is displaceably arranged within the first housing 110 along the principal axis A. It will be appreciated that the second housing 200 may be fittingly arranged within the first housing 110, e.g. by means of grooves or the like. In FIG. 2a, the second housing 200 is positioned in a first (extracted) position within the first housing 110. For example, the first, extracted position may constitute a position towards (or at) the front end portion of the first housing 110. The second housing 200 comprises a first sealing element 220, which is exemplified as a cushion or pad-like element arranged at an end of the tube portion 140 of the first housing 110.

(12) The coupling device 100 further comprises a third housing 300 which in the disconnected state of the coupling device 100 is separate from the first housing 110 and second housing 200 of the coupling device 100. The third housing 300 comprises a channel 310 which is arranged through the third housing 300. The third housing 300 further comprises a second sealing element 320 which is arranged to seal the second channel 310.

(13) It will be appreciated that in the disconnected state of the coupling device 100 as shown in FIG. 1a, there can be no passage of fluid through the coupling device 100. More specifically, the first sealing element 220 of the second housing 200 seals the tube portion 140 such that there is no passage of fluid through the second housing 200 or first housing 110. Analogously, the second sealing element 320 seals the second channel 310 such that there is no passage of fluid through the third housing 300.

(14) The first sealing element 220 and/or the second sealing element 320 may comprise, or consist of, a respective resilient membrane 600 for sealing purposes. The membrane 600 may comprise or consist of substantially any material which is suitable for sealing purposes, e.g. silicone. Furthermore, the first sealing element 220 and/or second sealing element 320 may have a convex shape. According to an alternative embodiment, the resilient membrane(s) 600 may comprise a through hole, and the resilient membrane(s) 600 may be configured to be arranged into (a) fitting(s) of the first 220 and/or second 320 sealing element (not shown). The size of the resilient membrane(s) 600 may hereby be larger than the fitting(s) such that the through hole(s) is (are) configured to be compressed upon arrangement of the resilient membrane(s) 600 into the fitting.

(15) The third housing 300 is insertable into the first housing 110 via the second opening 130 of the first housing 110. Hence, the first housing 110 is able to receive the third housing 300 via the second opening 130 thereof and accommodate the third housing 300 within the first housing 110. The first housing 110 and the third housing 300 may have elliptic cross-sections, whereas the second housing 200 may have a circular cross-section. It will be appreciated that the provision of elliptic cross-sections may facilitate the coupling between the housings. For example, the third housing 300 may be connected to the second housing 200 by a relative arrangement of 0 or 180 between the third housing 300 and the second housing 200.

(16) In the exemplifying embodiment of the coupling device 100 in FIG. 2a, the coupling device 100 comprises a locking mechanism 500 for releasable connection of the third housing 300 to the second housing 200. The third housing 300 comprises a first locking element 510 of the locking mechanism 500, wherein the first locking element 510 has the form of one or more hooks projecting from the third housing 300. The second housing 200 comprises a second locking element (not shown) of the locking mechanism 500 for locking engagement with the first locking element 510 of the locking mechanism 500.

(17) The coupling device 100 further comprises a locking arrangement 400 for releasably locking and/or connecting the second housing 200 to the first housing 110. The locking arrangement 400 comprises at least one groove 410 in the first housing 110 into which a locking element of the second housing 200 is configured to matingly engage (shown in FIG. 3a). The locking arrangement 400 of the coupling device 100 may be configured to generate a tactile feedback to an operator when the second housing 200 is in the second position. For example, the locking arrangement 400 may be configured to generate a snap and/or click sensation upon locking, such that an operator may be informed or made aware that the second housing 200 is connected to the first housing 110 in the second position.

(18) FIG. 2b is a schematic view of a coupling device 100 for transferring a fluid, wherein the third housing 300 has been inserted in the first housing 110 via its second opening 130 and along the principal axis A, as compared to FIG. 2a. Furthermore, in this state or position of the coupling device 100, the first sealing element 220 of the second housing 200 and the second sealing element 320 of the third housing 300 abut. Here, both the first sealing element 220 and the second sealing element 320 comprise resilient membranes 600 of convex shape, such that the central portions of the respective elements are initially configured to come into contact upon insertion of the third housing 300 into the first housing 110. In this embodiment, the convex-shaped membranes of the first and second sealing elements 220, 320 are configured to flatten upon abutment of the first sealing element 220 with the second sealing element 320. In this manner, the first and second sealing elements 230, 320 may sealingly separate the tube portion 140 of the first housing 110 and the channel 310 of the third housing 300.

(19) FIG. 2c is a schematic view of a coupling device 100 for transferring a fluid, wherein the second housing 200 and the third housing 300 are being displaced within the first housing 110. In this depicted current state of the coupling device 100, the convex-shaped membranes of the first and second sealing elements 220, 320 have flattened as a consequence of the force between the first sealing element 220 with the second sealing element 330, and the original shapes of the convex membranes are schematically indicated. During the movement of the second housing 200 (and the third housing 300) from the first, extracted position to the second, retracted position of the second housing, the tube portion 140 of the first housing 110 gradually projects through the first sealing element 220 and the second sealing element 320 for connection with the channel 310 for enabling a transfer of fluid through the coupling device 100. Furthermore, during this movement, the third housing 300 and the second housing 200 are configured to engagingly and releasably lock via the locking mechanism upon rotation of the first locking element and the second locking element with respect to each other.

(20) FIG. 2d is a schematic view of a coupling device 100 for transferring a fluid, wherein the second housing 200 is positioned in the second position in the first housing 110, and the third housing 300 is connected to the second housing 200. In this position, the third housing 300 and the second housing 200 are connected by means of the locking mechanism (not shown). The tube portion 140 projects or penetrates through the first sealing element 220 and the second sealing element 320. Furthermore, the tube portion 140 becomes fittingly inserted and debouches into the channel 310 of the third housing 300. In this configuration of the coupling device 100, a transfer of fluid through the coupling device 100 is enabled.

(21) FIG. 3a schematically shows a simplified view of a portion of the coupling device 100 as previously described. Here, the second housing 200 and the third housing 300 have been extracted from the coupling device for reasons of understanding of the locking operation of the second housing 200 and the third housing 300. The locking mechanism in FIG. 3a comprises a first locking element 510 of the third housing 300, wherein the first locking element 510 comprises two projecting portions each comprising a groove. The locking mechanism in FIG. 3a further comprises a second locking element 520 of the second housing 200, wherein the second locking element 520 comprises two projections. Upon movement of the third housing 300 towards the second housing 200, as indicated by arrow 535, the second locking element 520 is configured to rotate, as indicated by arrow 545, as the result of the second locking element 520 being guided by a groove in the first housing (not shown). The second locking element 520 is hereby rotated with respect to the first locking element 510 for mating engagement with the first locking element 510 such that the third housing 300 and the second housing 200 become connected in the second position of the second housing 200. It will be appreciated that second housing 200, in the second position, is releasably connected to the first housing 110 via the at least one groove 410 (see FIG. 2a) and the second locking element 520.

(22) Analogously, FIG. 3b schematically shows a simplified view of a portion of the coupling device 100 as previously described, and furthermore shows an unlocking operation of the second housing 200 and the third housing 300 of the coupling device 100 in a schematic manner. During a displacement of the second housing 200 and the third housing 300 from the second, retracted position to the first, extracted position, as indicated by arrow 555, the second locking element 520 is configured to rotate, as indicated by arrow 565, with respect to the first locking element 510. As a result, the second locking element 520 disengages the mating engagement with the third housing 300. The second locking element 520 is hereby rotated with respect to the first locking element 510 such that the third housing 300 and the second housing 200 become disconnected in the first position of the second housing 200.

(23) FIG. 4 schematically shows a disconnection of the coupling device 100 in case of a force F applied on the third housing 300 along the principal axis A exceeds a predetermined threshold. FT. In this case, the second housing (not shown) is configured to be released from a connection to the first housing 110 when the second housing is in its second, retracted position. Thereafter, the second housing and the third housing 300 are configured to be displaced from the second position into the first position, and the third housing 300 is configured to be released from its connection to the second housing. Eventually, the coupling device 100 becomes disconnected (detached), whereby the transfer of fluid through the coupling device 100 is interrupted.

(24) It will be appreciated that the coupling device 100 furthermore may comprise an alarm arrangement (not shown). The alarm arrangement may be configured to generate an alarm in case the second housing 200 and the third housing 300 are disconnected. The alarm may for example comprise a visual alarm and/or an audible alarm. Furthermore, the alarm may be coupled (wirelessly or by wire) to any other equipment used by the medical staff for monitoring the patient(s).

(25) FIG. 5 shows a medical kit 800 according to an embodiment of the present invention. The medical kit 800 comprises a medical (e.g. infusion) tube 700, which in turn comprises a schematically indicated coupling device 100. One or more elements may be connected to the medical tube via coupling arrangement(s) provided at end portions of the medical tube 700, wherein the coupling arrangement(s) may be of standardized type for coupling to different kinds of elements. For example, and as shown in FIG. 5, an element 810 is connected to an end portion of the medical tube 700, wherein the element 810 is arranged for insertion into a patient and configured to transfer a fluid to and/or from a patient. Furthermore, at the other end of the medical tube 700, the medical tube 700 is coupled to a container 820 (e.g. an infusion bag) arranged to supply a (infusion) fluid to a patient via the medical tube 700 and the element 810. It will be appreciated that the medical tube 700 may comprise a plurality of coupling devices 100 although FIG. 5 merely shows the use of one coupling device 100 for reasons of simplicity. The coupling device 100 may furthermore comprise at least one coupling arrangement, e.g. arranged at one or both ends of the coupling device 100, for coupling to different kinds of elements. Furthermore, the coupling arrangement(s) may be of substantially any type, e.g. a standardized coupling which may be possible to couple to many different kinds of elements. For example, the coupling arrangement(s) may comprise a coupling of Luer lock type and/or Luer slip type.

(26) The person skilled in the art realizes that the present invention by no means is limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. For example, it will be appreciated that the figures are merely schematic views of a coupling device 100 according to embodiments of the present invention. Hence, any elements/components of the coupling device may have different dimensions, shapes and/or sizes than those depicted and/or described.