Eyeglass frame with locked screw joint
AssigneeOBE-Werk Ohnmacht & Baumgartner GmbH & Co. KG
InventorGunther Drlik
Life of this patent
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Abstract
This invention relates to a locked screw joint for connecting two eyeglass members, particularly members of a closing block or a hinge of an eyeglass frame. A bore is provided with screw threads at one end and is provided at its other end with an abutment for the head of a hinge screw, which abutment consists of a flat surface or of a counterbore. The locked screw joint can be opened and reconnected, as is required in the manufacture and use of eyeglass frames. This is accomplished in that a conical elevation surrounding the bore is provided on the abutment surface for the screw head, the inner edge of the shank of the screw has a conical constriction under the screw head and as the shank is screwed in the conical elevation is deformed to extend into and is locked in the constriction.
Claims19
An eyeglass frame provided with a screw and a screw joint which is locked against separation and connects frame members, which particularly consist of two hinge members, wherein a bore is provided at one end with female screw threads and at its other end with a flat abutment surface which extends radially outwardly from said bore and is provided with a wall to define a receptacle for receiving a screw head, characterized in that at least one of said hinge members and screw head are made from a deformable material, a conical elevation surrounding the bore is provided on the abutment surface for the screw head, an inner edge of a shank of the screw having a conical constriction under the screw head, whereby the shank is screwed in, the conical elevation surrounding said bore is deformed to extend into and is locked in the constriction.
An eyeglass frame provided with a screw having a shank having a partial thread and a screw joint which is locked against separation and connects frame members, which particularly consist of two hinge members, wherein a bore is provided at one end with female screw threads and at its other end with a flat abutment surface forming a receptacle for receiving said screw head, a conical recess is provided on the outer periphery of the abutment surface for the screw head and the shank is provided at its outer edge, under the screw head, with a deformable conical rib, which will be deformed in abutting the hinge member and extend into the receptacle so as to effect a lock as the shank is screwed in.
Dependencies are inferred from the claim text.