Coupling parts for connecting a driving device to an expander head

20:

• The first coupling part according to claim 19, wherein radial ends of the circumferential portions lie at an outer circumference which has a contour substantially corresponding to a contour of the circumference of the first coupling part.

21:

• The first coupling part according to claim 19, further comprising at least one stop configured to delimit at least one of a coupling movement and an uncoupling movement of the first coupling part relative to the second coupling part.

22:

• The first coupling part according to claim 19, wherein the circumferential portions are immovable relative to the first coupling part.

23:

• The first coupling part according to claim 19, wherein the circumferential portions are held movably on the first coupling part and are movable out of an engagement position with respect to the second coupling part.

24:

• The first coupling part according to claim 23, wherein the circumferential portions are movable out of the engagement position with respect to the second coupling part against a restoring force of at least one spring element.

25:

• The first coupling part according to claim 19, further comprising pressing elements configured to press the second coupling part against the contact face of the circumferential portions in the assembled state of the coupling parts.

26:

• The first coupling part according to claim 19, wherein the first coupling part is configured to be connected to the second coupling part via a thread of the circumferential portions being brought into a screw connection of the second coupling part by rotation about the axis.

27:

• The first coupling part according to claim 19, further comprising the driving device.

28:

• The first coupling part according to claim 27, further comprising an adjustment device configured to move the first coupling part coupling part in an axial direction relative to the expanding mandrel in relation to an initial position thereof.

29:

• A second coupling part of a coupling for connecting a driving device to an expander head associated with the second coupling part and configured to expand pipes and hoses and to be actuated via an expanding mandrel driven by the driving device, the second coupling part comprising:
• at least one counter-portion configured to engage from behind with radially outwardly projecting circumferential portions of a first coupling part associated with the driving device and to act on a respective contact face of the circumferential portions in an assembled state of the coupling parts in which the coupling parts are disposed along an axis along which the expanding mandrel is movable for the actuation of the expander head.

30:

• The second coupling part according to claim 29, wherein the at least one counter-portion is dimensioned circumferentially so as to engage with the circumferential portions upon the coupling parts moving axially relative to one another.

31:

• The second coupling part according to claim 29, wherein the at least one counter-portion corresponds circumferentially to at least one respective gap disposed between mutually adjacent circumferential portions of the first coupling part.

32:

• The second coupling part according to claim 29, wherein the at least one counter-portion forms a circumferential rim that extends in a radial direction of the second coupling part.

33:

• The second coupling part according to claim 29, wherein the at least one counter-portion forms a circumferentially continuous rim that extends in a radial direction of the second coupling part.

34:

• The second coupling part according to claim 29, wherein the at least one counter-portion is a plurality of counter-portions.

35:

• The second coupling part according to claim 29, further comprising the expander head.

37:

• The coupling according to claim 36, wherein the second coupling part includes a thread corresponding to a thread of the first coupling part such that that the coupling parts are configured to be interconnected by screwing.