Abstract: A reversibly detachable fluid-line coupling having a coupling sleeve, a locking component and a coupling plug. The locking component is in the form of a flat, open spring-steel ring has latching claws projecting radially into the interior of the spring-steel ring and distributed over the circumference of the spring-steel ring and has axially oriented support tongues, wherein, in the region of the coupling head, the locking component resiliently surrounds the coupling head and the latching claws project into the interior of the coupling sleeve through the slots in the coupling head and the support tongues of the spring-steel ring correspond to the support webs of the coupling head and in each case one support tongue is assigned to one support web.

Abstract: A reversibly detachable fluid line coupling (1), at least having a coupling sleeve (2), a locking element (3) and a coupling plug (4) with a locking collar (41). The reversibly detachable fluid line coupling has a locking state of which can easily be checked automatically. This coupling has actuating/signaling surfaces (312) which are only visible when the coupling is in the unlocked state.

Abstract: The invention relates to a reversibly detachable fluid line coupling (1), at least having a coupling sleeve (2), a locking element (3) and a coupling plug (4) with a locking collar (41). The invention was based on the object of creating a fluid line coupling of the type described at the outset, the locking state of which can easily be checked automatically, with a visual check being preferred. This object is achieved in that the coupling has actuating/signaling surfaces (312) which are only visible when the coupling is in the unlocked state.

Abstract: A plug-in coupling for fluid lines, having a coupling sleeve (1) made of plastic, which has blocking openings (3), wherein the coupling sleeve (1) has, in the region of the blocking openings (3), at least one reinforcement (9) made of a metal material. The reinforcement (9) may have apertures (10) which correspond to the blocking openings (3) and through which a spring blocking element (5) can engage with pawls (7). As a result, it is possible to ensure that, even in the event of high contact pressures between the spring blocking element (5) and the coupling sleeve (1), separation of the blocking openings (3) can be ruled out.

Abstract: A reversibly detachable fluid-line coupling (1), at least having a coupling sleeve (2, 3), a locking element (7) and a coupling plug (8). The invention was based on the object of providing a fluid-line coupling (1) of the type described in the introduction that can be constructed from plastic while avoiding the stated difficulties.

Abstract: The invention relates to a method and a device for producing a fluid line (7) with a connecting element formed on an end portion of the fluid line (7), wherein the connecting element comprises a coupling part (8) and a connector (70) which connects to the coupling part (8) toward the end of the fluid line.

Abstract: The invention relates to a method and a device for producing a fluid line (7) with a connecting element formed on an end portion of the fluid line (7), wherein the connecting element comprises a coupling part (8) and a connector (70) which connects to the coupling part (8) toward the end of the fluid line.

Abstract: A coupling fitting comprises a pipeline and a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.

Abstract: The invention is directed to a coupling fitting, having a pipeline and having a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.