Abstract: A flange connection has two flanges and a weld ring gasket arranged between the flanges, wherein the weld ring gasket has two weld ring halves arranged one on top of the other, each having a base section and a lip arranged on it, wherein the weld ring halves are welded to the base section by way of a fillet weld with the flange that lies against it, and wherein the lips form a torus-shaped connection section having a hollow interior, and the weld ring halves are welded to one another at the torus-shaped connection section, by way of a caulking seam. The torus-shaped connection section is arranged to lie radially on the inside.

Abstract: A method for controlling an artificial orthotic or prosthetic knee joint, on which a lower-leg component is arranged and with which a resistance device is associated, the bending resistance (R) of which resistance device is changed in dependence on sensor data that are determined by at least one sensor during the use of the orthotic or prosthetic knee joint, wherein a linear acceleration (aF) of the lower-leg component is determined, the determined linear acceleration (aF) is compared with at least one threshold value, and, if a threshold value of the linear acceleration (aF) of the lower-leg component is reached, the bending resistance (R) is changed.

Abstract: A flange connection has two flanges and a weld ring gasket arranged between the flanges, wherein the weld ring gasket has two weld ring halves arranged one on top of the other, each having a base section and a lip arranged on it, wherein the weld ring halves are welded to the base section by way of a fillet weld with the flange that lies against it, and wherein the lips form a torus-shaped connection section having a hollow interior, and the weld ring halves are welded to one another at the torus-shaped connection section, by way of a caulking seam. The torus-shaped connection section is arranged to lie radially on the inside.