Patent ID: 8668062

Claim:
A damper for furniture, the damper comprising: a housing; a piston located in the housing and a piston rod connected to the piston, the piston configured to be displaceable inside the housing; at least one flow channel located either in or on the piston, the at least one flow channel configured to accommodate a fluid flow; a plate inside the housing configured to be moved relative to the piston; at least one groove formed on the at least one flow channel, and a different damping power is obtained during movement of the piston in different directions, wherein a cross-section of the at least one flow channel is configured to be modified, at least in sections, on the at least one groove; a substantially funnel-shaped outlet is formed on the at least one groove at a transition between the substantially funnel-shaped outlet and the at least one groove, the substantially funnel-shaped outlet extending in a trumpet shape to avoid cavitation during the fluid flow; and wherein the transition is rounded and has a radius of curvature between 0.3 and 2 mm.