Patent ID: 8113549

Claim:
A coupling part having an axial direction and a radial direction, the axial and radial directions perpendicular to one another, comprising: a receiving portion including a receiving space; a plug-in part receivable within said receiving space, said plug-in part including an annular shoulder; a locking element displaceably disposed in said receiving portion and operative to lock said plug-in part within said receiving space; a checking element separate from said locking element, said checking element displaceably mounted in a checking part seat of said receiving portion for movement in the radial direction independently of said locking element between first and second checking positions, said checking element including at least one lateral spring arm having a length extending in the radial direction and deflectable in the axial direction, each said spring arm including an actuating structure and a free end having an engagement structure, said actuating structure and said engagement structure spaced from one another along said length of said spring arm; and a latching structure associated with said checking part seat, said latching structure cooperating with said engagement structure whereby, upon contact of said annular shoulder of said plug-in part with said actuating structure, said checking element is shiftable in the radial direction from said first checking position to said second checking position in which said checking element is out of engagement with said plug-in part.