Abstract: The invention relates to a plug connector (2) for connecting lines for liquid or gaseous media, comprising a connector body (5); a locking element (6), which is provided for securing the plug connector (2) relative to a mating plug connector. Moreover, an indicator element (24) and a guide receptacle (25) for receiving the indicator element (24) in a displaceable manner is formed, wherein the indicator element (24) is received in the guide receptacle (25) such that the indicator element (24) is displaceable between a rest position and an indicator position, wherein the indicator element (24) has an indicator surface (30), which is visible in the indicator position of the indicator element (24) and, in the rest position of the indicator element (24), is at least partially concealed, wherein the indicator surface (30), when it is visible, serves to signal that the plug connector (2) is plugged into the mating plug connector (3) correctly, and/or that the locking element (6) is locked correctly.

Abstract: The invention relates to a plug-in coupling seal (1) for a fluid line of a drive motor, wherein the plug-in coupling seal (1) has an outer surface (5) for accommodation in a first coupling part (11) and an inner surface (7) for contact against a second coupling part (12) to be pushed in insertion direction (16) into the first coupling part (11). A microstructuring (22) having protruding structuring elements (23) for reduction of the resistance of the second coupling parts (12) to insertion into the first coupling part (11) is formed on the inner surface (7).

Abstract: A connector has a connector body, which connector body includes an annular space which lies between a sleeve-like first casing section and a sleeve-like second casing section of the connector. The first casing section of the connector body is connected to the second casing section at a first end section by a first end wall section. The casing sections are open to one another at a second end section. In the first casing section and in the second casing section at least two passages are formed which are provided for mounting a locking element. In the connector body between the first casing section and the second casing section a reinforcing element is inserted, wherein the reinforcing element is arranged at least in the area of one of the passages.

Abstract: The invention relates to a connector (2) comprising a connector body (5), the connector body (5) having at least one sleeve-type outer casing section (13) which when viewed in cross-section surrounds a central longitudinal axis (8) of the connector (2). At least two passages (33) are formed in the outer casing section (13), the passages being provided for receiving an end section of a locking element (6). The locking element (6) is designed to secure the connector (2) relative to a mating connector (3), and a retaining element (38) for securing the locking element (6) is arranged in at least one of the passages (33). The retaining element (38) is designed as a formed sheet metal part and a separate retaining element (38) is provided for each passage (33?).

Abstract: The invention relates to a plug-in coupling seal (1) for a fluid line of a drive motor, wherein the plug-in coupling seal (1) has an outer surface (5) for accommodation in a first coupling part (11) and an inner surface (7) for contact against a second coupling part (12) to be pushed in insertion direction (16) into the first coupling part (11). A microstructuring (22) having protruding structuring elements (23) for reduction of the resistance of the second coupling parts (12) to insertion into the first coupling part (11) is formed on the inner surface (7).

Abstract: The invention relates to a connector (2) with a connector body (5), which connector body (5) comprises an annular space (22) which lies between a sleeve-like first casing section (10) and a sleeve-like second casing section (13) of the connector (2). The first casing section (10) of the connector body (5) is connected to the second casing section (13) at a first end section (14) by a first end wall section (15). The casing sections (10, 13) are open to one another at a second end section (23). In the first casing section (10) and in the second casing section (13) at least two passages (33) are formed which are provided for mounting a locking element (6). In the connector body (5) between the first casing section (10) and the second casing section (13) a reinforcing element (7) is inserted, wherein the reinforcing element (7) is arranged at least in the area of one of the passages (33).

Abstract: The invention relates to a connector (2) comprising a connector body (5), the connector body (5) having at least one sleeve-type outer casing section (13) which when viewed in cross-section surrounds a central longitudinal axis (8) of the connector (2). At least two passages (33) are formed in the outer casing section (13), the passages being provided for receiving an end section of a locking element (6). The locking element (6) is designed to secure the connector (2) relative to a mating connector (3), and a retaining element (38) for securing the locking element (6) is arranged in at least one of the passages (33). The retaining element (38) is designed as a formed sheet metal part and a separate retaining element (38) is provided for each passage (33?).