Patent ID: 9599136
Date: 2017-03-21
CPC Classifications: F16B

Claim:
1. A fastening system for fastening a first profile bar, having a first groove with a first groove opening, and a second profile bar, having a second groove with a second groove opening, relative to each other at a predetermined angle; the fastening system comprising: a fastening body comprising a top face and a bottom face opposite the top face, the fastening body further comprising a first projection arranged at the bottom face and insertable into the first groove opening and a second projection arranged at the bottom face and insertable into the second groove opening; wherein the first projection comprises at least one first screw bore and the second projection comprises at least one second screw bore, wherein the first screw bore comprises two diagonally opposed first radial recesses and wherein the second screw bore comprises two diagonally opposed second radial recesses; a first hammerhead screw comprising a first shaft and a first hammerhead and further comprising at a transition between the first hammerhead and the first shaft, first noses arranged approximately diagonally relative to each other, wherein the first hammerhead screw is arranged on the fastening body such that the first shaft is positioned in the first screw bore and is accessible from the top face and the first hammerhead is arranged at the bottom face and projects downward past the first projection; a second hammerhead screw comprising a second hammerhead and a second shaft and further comprising, at a transition between the second hammerhead and the second shaft, second noses arranged approximately diagonally relative to each other, wherein the second hammerhead screw is arranged on the fastening body such that the second shaft is positioned in the second screw bore and is accessible from the top face and the second hammerhead is arranged at the bottom face and projects downward past the second projection; wherein the first hammerhead is a first freeform head that is insertable through the first groove opening into the first groove and upon insertion generates an inwardly turning moment by contacting with slanted surfaces of the first freeform head opposed groove flanks of the first groove opening only at two groove flank points that are remote from each other and automatically aligns relative to the first groove in a first longitudinal groove direction and moves into the first groove; wherein the second hammerhead is a second freeform head that is insertable through the second groove opening into the second groove and upon insertion generates an inwardly turning moment by contacting with slanted surfaces of the second freeform head opposed groove flanks of the second groove opening only at two groove flank points that are remote from each other and automatically aligns relative to the second groove in a second longitudinal groove direction and moves into the second groove; a first screw nut configured to be screwed onto the first shaft on the top face and a second screw nut configured to be screwed onto the second shaft on the top face, wherein the first and second screw nuts are tightened to secure the fastening body on the first and second profile bars when the fastening body is inserted with the first and second projections and the first and second hammerheads in the first and second grooves; wherein the first noses of the first hammerhead screw are positioned in the first radial recesses of the first screw bore and limit rotation of the first hammer head screw when the first nut is tightened; wherein the second noses of the second hammerhead screw are positioned in the second radial recesses of the second screw bore and limit rotation of the second hammer head screw when the second nut is tightened.