DEVICE FOR CONNECTING A FLEXIBLE TUBE OR PIPE, PREFERABLY A CAPILLARY

Abstract

The present invention relates to a device for connecting a tube or hose, preferably a capillary, comprising a core element having a threaded section for connecting to a connection socket, and a cap element which extends around the core element in the peripheral direction offset from the threaded section in a longitudinal direction, wherein the core element and the cap element are rotationally coupled to one other in a way that a torque applied to the cap element is transferred to the core element, and above a threshold of the torque in a screw-in rotational direction of the core element a relative movement of the cap element is performed relative to the core element instead of the transfer of torque, wherein an intermediate element for providing a coupling between the core element and the cap element is arranged.

Claims

1. Device (1) for connecting a pipe or hose, preferably a capillary (6), comprising a core element (2) with a threaded area (20) for connecting to a connection bushing, and a cap element (3) extending in a longitudinal direction (5) to the thread section (20) in the circumferential direction around the core element (2) stretching cap element (3), wherein the core element (2) and the cap element (3) are thus rotated to each other, that a cap element (3) applied torque is transferred to the core element (2) and above a threshold value of the torque in a screw-in direction of rotation of the core element (2) instead of the torque transmission a relative movement of the cap element (3) relative to the core element (2) takes place, characterized in that between the core element (2) and the cap element (3) an intermediate element (4) to provide the coupling between the core element (2) and the cap pen element (3).

2. Device (1) according to claim 1, characterized in that the core element (2) a metal, a metal alloy or a plastic material has, and/or that the cap element (3) has a plastic material, and/or that the intermediate element (4) has a plastic material, wherein the plastic material of the core element (2), the intermediate element (4) and/or the cap element (3) is preferably a reinforced plastic material or a composite material with a reinforcing material, preferably ceramic, glass or carbon.

3. Device according to claim 1, characterized in that the plastic materials of the cap element (3) and the intermediate element (4) are different from one.

4. Device (1) according to claim 1, characterized in that the intermediate element (4) is firmly arranged on the core element (2), wherein preferably the intermediate element (4) is an overmolding, preferably a plastic overmolding, of the core element (2), or that the intermediate element (4) is applied to the core element (2) via 3D printing, sintering or pressing.

5. Device (1) according to claim 1, characterized in that in a form-fitting section in the circumference direction a form-fitting between the intermediate element (4) and the core element (2) is formed.

6. Device (1) according to claim 1, characterized in that the intermediate element (4) has at least one elastic spring element (40) in intervention with an intervention area of the cap element (3), where in the elastic spring element (40) is formed in such a way that below the threshold value a torque transfer in both directions of rotation takes place, and above the threshold value in the screw-in direction of rotation the spring element (40) an elastic deformation A relative movement between the cap element (3) and the intermediate element (4) is possible.

7. Device (1) according to claim 1, characterized in that the cap element (3) has at least one elastic spring element in intervention with an intervention area of the intervening element (4), wherein the elastic spring element is formed in such a way that below the threshold value a torque transmission in both directions of rotation takes place, and above the threshold value in the screw-in direction of rotation the spring element undergoes an elastic deformation, so that a relative movement between the capping element (3) and the intermediate element (4) is possible, wherein preferably the spring element is further formed in this way.

8. Device according to claim 6, characterized in that the spring apparatus (40) is further designed in such a way that contrary to the screw-in direction of rotation always a torque transmission takes place.

9. Device (1) according to claim 1, characterized in that the core element (2) is formed as a turned part.

10. Device according to claim 1, characterized in that, preferably on the core element (2), further a sealing element, a pressure piece, a twist protection, a child lock, and/or a predetermined breaking point is provided.

Description

[0024] BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0025] These and other features and advantages of the present invention will become more readily appreciated when considered in connection with the following detailed description and appended drawings, wherein:

[0026] FIG. 1 is a schematic side view of the device for connecting a capillary;

[0027] FIG. 2 is a schematic section view of the device of FIG. 1; and

[0028] FIG. 3 is a schematic side view of the device of FIG. 1 with fitted capillary and sleeve.

DETAILED DESCRIPTION OF THE INVENTION

[0029] In the following preferred exemplary embodiments are described with reference to the figures. Here identical, similar or elements appearing identically are denoted by using identical reference signs in the variety of figures. A description of said elements is thus not repeated in order to avoid redundancies.

[0030] FIG. 1 schematically shows a side view of the device 1 for connecting a capillary. The device 1 comprises a core element 2 having a threaded portion 20 for connecting to a threaded connection bushing, and a cap element 3 which extends in a longitudinal direction 5 offset from the threaded portion 20 in the peripheral direction around the core element 2 with regard to the longitudinal direction. The core element 2 and the cap element 3 are rotationally coupled with one another in a way that an outer torque applied on the cap element 3 is transferred to the core element 2, wherein above a threshold of a torque in a screw-in rotational direction of the core element 2 a relative movement of the cap element 3 is performed relative to the core element 2 instead of the transfer of torque, as has been described with regard to FIG. 2.

[0031] FIG. 2 schematically shows a section view of the device 1 of FIG. 1. Between the core element 2 and the cap element 3 an intermediate element 4 for providing a coupling from the core element 2 to the cap element 3 is provided.

[0032] The core element 2 comprises a metal alloy. The cap element 3 comprises a plastic material. The intermediate element 4 comprises a plastic material which normally differs from the cap element 3.

[0033] The intermediate element 4 is fixedly arranged on the core element 2, wherein the core element 4 is thus a plastic overmolding which is applied to the core element 2.

[0034] In order to improve the transfer of torque between the core element 2 and the intermediate element, a positive locking may be formed in a positive locking section (not shown) between the intermediate element 4 and the core element 2 in the peripheral direction.

[0035] The intermediate element 4 comprises a plurality of resilient spring elements 40 which are arranged spaced apart from one another around the peripheral direction and are engaged with an engagement portion of the cap element 3. They are formed in a way that below the threshold a transfer of torque between the intermediate element 4 and the cap element 3 may be performed via the spring elements 40 in both rotational directions, and above the threshold in the screw-in rotational direction of the threaded portion 20 of the core element 2, the spring elements 40 may experience a resilient deformation, thus a relative movement between the cap element 3 and the intermediate element 4 and thus between the core element 2 and the cap element 3 is possible. In other words, this way a ratchet feature or function is provided. In addition, the spring elements 40 are configured in a way that a transfer of torque may always be performed against the screw-in rotational direction.

[0036] Here, the usually metal core element 2 is formed as a turned part.

[0037] FIG. 3 schematically shows a side view of the device 1 from FIG. 1 including an inserted capillary 6 comprising a stopper 8 on the side of the cap element 3 and an inserted sleeve 7 on the side of the threaded portion 20.

[0038] Where applicable, any single features which are presented in the exemplary embodiments may be combined and/or replaced by one another without leaving the scope of the invention.

[0039] The foregoing invention has been described in accordance with the relevant legal standards, thus the description is exemplary rather than limiting in nature. Variations and modifications to the disclosed embodiment may become apparent to those skilled in the art and fall within the scope of the invention.

List of Reference Numbers

[0040] 1 Device [0041] 2 Core element [0042] 20 Threaded section [0043] 21 Axial passage [0044] 22 Blind hole [0045] 3 Cap element [0046] 4 Intermediate element [0047] 40 Spring element [0048] 5 Longitudinal direction [0049] 6 First capillary [0050] 7 Sleeve [0051] 8 Stopper