Abstract: A coupling part for a hose coupling, in particular for high-pressure hydraulic lines, and a hose coupling having such coupling part, has a connection head for connecting to a fitting, and, formed on the connection head, a press-fit nipple, which is intended for accommodating a hose-end portion, on which a pushed-on hose-end portion can be fastened in a sealing manner by pressing action by an at least partially sleeve-form press-fit ferrule enclosing the hose-end portion, and which has a rib profile including ribs bounded by grooves. The rib profile has at least two profile portions. The grooves of the first profile portion, which is directed towards the connection head, have a symmetrical cross section and the grooves of the second profile portion have an asymmetrical cross section and a larger groove volume than the grooves of the first profile portion.

Abstract: A coupling part for a hose coupling, in particular for high-pressure hydraulic lines, and a hose coupling having such coupling part, has a connection head for connecting to a fitting, and, formed on the connection head, a press-fit nipple, which is intended for accommodating a hose-end portion, on which a pushed-on hose-end portion can be fastened in a sealing manner by pressing action by an at least partially sleeve-form press-fit ferrule enclosing the hose-end portion, and which has a rib profile including ribs bounded by grooves. The rib profile has at least two profile portions. The grooves of the first profile portion, which is directed towards the connection head, have a symmetrical cross section and the grooves of the second profile portion have an asymmetrical cross section and a larger groove volume than the grooves of the first profile portion.

Abstract: A coupling piece, especially a coupling plug, for a screw coupling for pressure medium lines, especially hydraulic lines, for coupling with a corresponding coupling piece, especially a coupling sleeve, in the direction of a coupling axis, having a casing-like coupling housing and a locking casing, especially a locking nut, for locking the coupling piece with the corresponding coupling piece in the coupled setting, wherein the locking casing, has a locking casing thread, especially a locking nut interior thread, for screw connection with a locking counter thread of the corresponding coupling piece, and wherein the locking casing, especially the locking nut in its non-locked setting is mounted in freely turnable fashion on the housing, around the coupling axis, wherein the coupling piece has means by which the locking nut in its locking setting is able to be connected, in an axial direction with the housing so as not to shift or turn.

Abstract: A coupling part, particularly a coupling cuff, for a quick-release coupling for high-pressure hydraulic lines, has a coupling housing having a through-flow channel and a valve device disposed within the through-flow channel, this device having a tappet-like closing valve for closing off the through-flow channel in the uncoupled state of the coupling part. The coupling housing has a conical valve seat surface, and the closing valve has a longitudinal valve axis as well as a valve head having a conical surface and a valve sealing ring for sealing contact with the valve seat surface. The valve sealing ring has a circular-cylindrical ring circumference surface that projects beyond the conical surface in the radial direction and has a valve seal diameter DVD.

Abstract: A coupling part, particularly a coupling cuff, for a quick-release coupling for high-pressure hydraulic lines, has a coupling housing having a through-flow channel and a valve device disposed within the through-flow channel, this device having a tappet-like closing valve for closing off the through-flow channel in the uncoupled state of the coupling part. The coupling housing has a conical valve seat surface, and the closing valve has a longitudinal valve axis as well as a valve head having a conical surface and a valve sealing ring for sealing contact with the valve seat surface. The valve sealing ring has a circular-cylindrical ring circumference surface that projects beyond the conical surface in the radial direction and has a valve seal diameter DVD.