Tubular joint for receiving and fastening tubular skeleton elements of artificial limbs

Claim 1

A tubular coupling for receiving and fastening a skeleton tubular element of an artificial limb, comprising a tubular member having a chamber to receive the tubular element therein and further formed with a recess defined by inner walls of the coupling conically inclined towards each other; two clamping grips positioned in said recess, said grips having circular surfaces corresponding to the outer surface of the tubular element to be received in said chamber; and an adjusting screw insertable into the coupling to press against said clamping grips so that said grips abut against said inner inclined walls and said circular surfaces abut against the tubular element received in said chamber to clamp it in position, said clamping grips being positioned in said tubular member so that they are pivotable in the direction of an axis of the tubular member, said clamping grips being overhung in said recess, said adjusting screw being inserted into said tubular member at the heights thereof corresponding to positions of pivot points of said clamping grips, said clamping grips each having a curved surface corresponding to the respective inclined inner wall of the tubular member, said grips being each connected to the tubular member at a point extending approximately in the middle of a curvature defining said curved surface.