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AssigneeJohannes Schafer Vorm. Stettiner Schrauben Werke GmbH & Co. KG
InventorHans Georg Funk
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The invention is directed to a coupling assembly having a male member (1) with a spigot (5) to be received in an opening (21) in a female member (2), and a radially deformable retaining element (3) which is arranged in a recess (22) in the female member (2) and is radially elastically deformable and adapted to be urged into the recess (22) during the coupling operation by a support element (12) disposed on the spigot (5). In the locked position, the spigot (5) is locked against being pulled out of the opening due to the cooperation between the support element (12) and the retaining element (3). To uncouple the coupling assembly, an unlocking element (15) is provided. The support element (15) is releasably connected with the spigot (5) in order to enable assembly of the unlocking element (15).
A coupling assembly for pipelines having two connecting members, including a male member and a female member which are connectable to and separable from each other, the male member having a spigot to be received in an opening in the female member for locking engagement therein by a radially deformable retaining element which is arranged in a recess in the opening of the female member and is urged into said recess by radial elastic deformation during the coupling operation, said spigot being provided with a recess into which the retaining element, due to elastic recovery, engages in the locked position of the connecting members so that the spigot is locked by the retaining element against being pulled out of the opening, and the rear side wall of the recess in the spigot, as seen looking in the coupling direction, being defined by an end surface of an unlocking element mounted on the spigot in an axially slidable arrangement, characterized in that the front side wall of the recess in the spigot, as seen looking in the coupling direction, is formed by an annular support element which engages in a circumferential groove in the spigot and is supported in axial direction inside the circumferential groove, and that the diameter of that section of the spigot in front of the circumferential groove, as seen looking in the coupling direction, is at most the same size as the smallest inner diameter of the unlocking element.
A combination of a coupling assembly for pipelines and a release tool, in which the coupling assembly has a male member comprising a spigot to be received in an opening in the female member for locking engagement therein by an elastically deformable retaining element which is arranged in a recess in the opening of the female member and is urged into said recess by radial deformation during the coupling operation, and said retaining element engaging in the locked position of the spigot, due to elastic recovery within a recess in the spigot, so that the spigot is locked by the retaining element against being pulled out of the opening, and in which the rear side wall of the recess in the spigot, as seen looking in the coupling direction, is defined by an end surface of a cylindrical unlocking sleeve mounted on the spigot in an axially slidable arrangement, said unlocking sleeve having a radial shoulder abutting an annular collar of the spigot for the introduction of a displacement force, characterized in that one of the shoulder of the unlocking sleeve and the annular collar of the spigot has a recess open in radially outward direction in the abutment surface on the side close to the one of the annular collar and the shoulder, and in that the release tool has a fork with two prongs which enclose a space for accommodating the spigot and, embracing the spigot, are insertable in the recess in radial direction in such manner that the unlocking sleeve is movable in the release direction by a torque acting on the release tool around an axis linking the points of engagement of the prongs in the recess.
Dependencies are inferred from the claim text.