PLUG-IN COUPLING FOR FLUID LINES
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.
1 .- 5 . (canceled)
6 . A plug-in coupling for fluid lines comprising:
at least one female line portion ( 1 ) comprising plastic and in which a male line portion ( 12 ) is able to be plugged in a sealing manner; and,
at least one resilient locking device, by which the at least one female line portion ( 1 ) and the male line portion ( 12 ) are able to be locked together and unlocked from one another, wherein the device comprises at least one spring blocking element ( 5 ) and the female line portion ( 1 ) has blocking openings ( 3 ) which correspond to the at least one spring blocking element ( 5 );
wherein the female line portion ( 1 ) has, in the region of the blocking openings ( 3 ), at least one reinforcement ( 9 ) made of a metal material.
7 . The plug-in coupling as claimed in claim 1 , wherein the at least one metal reinforcement ( 9 ) is in the form of a ring which is arranged around the female line portion ( 1 ) in the region of the blocking openings ( 3 ).
8 . The plug-in coupling as claimed in claim 7 , wherein the metal ring ( 9 ) comprises apertures ( 10 ) which correspond to the blocking openings ( 3 ) such that the spring blocking element ( 5 ), with the coupling fully assembled, can engage both through the apertures ( 10 ) in the metal ring ( 9 ) and through the blocking openings ( 3 ).
9 . The plug-in coupling as claimed in claim 6 , wherein the metal ring ( 9 ) is in the form of a split spring ring and the female line portion ( 1 ) has axially spaced-apart ring webs ( 2 A) between which the split spring ring ( 9 ) is able to be positioned such that the spring ring ( 9 ) is fixed axially to the female line portion ( 1 ).
10 . The plug-in coupling as claimed in claim 6 , wherein the metal ring ( 9 ) is in the form of a closed ring with a predetermined diameter, and wherein the closed ring ( 9 ) is embedded in the plastic of the female line portion ( 1 ).