Patent ID: 7010831

Claim:
A screw connection for at least two hinge parts, comprising a screw configured for interconnecting the at least two hinge parts, wherein the hinge parts engage one inside the other and have an upper hinge lobe, a lower hinge lobe, and at least one middle hinge lobe, said screw having a screw head and a screw shank that extends through a first through opening in the upper hinge lobe and extends through a second through opening in the middle hinge lobe, with a thread permitting the screw shank to be screwed into the lower hinge lobe, and comprising a sleeve that surrounds the screw shank, has elastic properties, and interacts with the upper and middle hinge lobes when the screw is in a screwed-in state, whereby the diameter of the second through opening is less than or equal to the diameter of the first through opening, and the screw has at least one bearing surface for contacting the sleeve with at least one engaging surface that is aligned in the direction of movement in which the screw is unscrewed, the improvement comprising: the screw shank having an annular collar that, in the screwed-in state is situated in the middle hinge lobe, said annular collar providing said at least one engaging surface to retain and support said sleeve thereagainst when said screw shank and sleeve are removed from said middle lobe, and wherein the annular collar acts as a guide collar for insertion of said screw into said second through opening in said middle lobe and wherein in the circumferential surface of the first through opening is provided at least one longitudinal groove, running parallel or essentially parallel to the direction of movement in which the screw is screwed and unscrewed for protecting the sleeve from twisting.