Patent ID: 8366495

Claim:
An appliance for connecting high-current electric apparatuses, comprising an electrically conducting body and at least one connection piece, where the connection piece has a seat surface arranged to encircle the body in a concentric manner, a retention portion having monotonic decreasing cross-sectional size being disposed on the body, and wherein the retention portion is retained in the seat by frictional connection and the retention portion has increased contact surface, wherein the angle between the contact surface of the retention portion and the axis of the body is α, the contact surface is increased by indentations in the form of ribs arranged perpendicular to the axis of the body and/or as grooves extending along the axis of the body, wherein the ribs are in the form of triangular cross-section circular flanges, wherein the height of the flanges is 2-5% of the largest diameter of the retention portion as measured perpendicular to its axis, and wherein the angle (γ) between the sides of each flange is 1-150°, and/or wherein the grooves are in the form of flutes having a triangular cross section, extending from the axis of the body in an angle from 0° up to angle α, wherein the height of the flutes is 2-5% of the largest diameter of the retention portion as measured perpendicular to its axis, and where the angle (δ) between the sides of each flute is 1-150°, and wherein the indentations undergo different amounts of local deformation along the axis of the body as the appliance is pressed together.