Hydraulic damper with an x-flow piston assembly

A hydraulic damper comprising:

• a tube extending along an axis and filled with working liquid;
• a piston assembly disposed slidably inside said tube and dividing said tube into a rebound chamber and a compression chamber, and attached to a piston rod extending outside of said tube;
• said piston assembly including:
• a piston body including at least two first channels sloped with respect to said axis and extending between a compression side and a rebound side, and at least two second channels sloped with respect to said axis and extending between a rebound side and a compression side;
• said compression side of each of said first channels is positioned radially outward relative to said rebound side of each of said first channels, and said rebound side of each of said second channels is positioned radially outward relative to said compression side of each of said second channels, thus forming a cross-flow arrangement through said piston body;
• at least one main rebound side disc at least partially covering said rebound side of each of said first channels, and at least one main compression side disc at least partially covering said compression side of each of said second channels;
• said piston body further defining a plurality of supplementary channels each provided with a compression side and a rebound side, said supplementary channels being positioned radially inward with respect to said first channels and said second channels;
• and
• at least one supplementary rebound side disc at least partially covering said rebound side of said supplementary channels, at least one supplementary compression side disc covering said compression side of said supplementary channels, and wherein said supplementary channels are each configured to be fluidly connected with said rebound chamber and said compression chamber during compression and/or rebound strokes of said damper;
• wherein said compression side of said piston body defines at least one compression side annular recessed seat extending axially into said piston body toward said rebound side of said piston body and enabling fluid communication between entries of said supplementary channels, and wherein said at least one supplementary compression side disc covers said at least one compression side annular recessed seat;
• wherein said compression side of said piston body further defines at least one inner compression side annular seat extending axially into said piston body toward said rebound side of said piston body and enabling fluid communication between entries of said second channels;
• wherein said supplementary rebound side disc presents at least one passage fluidly connecting at least one of said first channels and at least one of said supplementary channels, and wherein during a compression stroke, when a piston rod velocity increases and a pressure of working liquid in said at least one supplementary channel exceeds a supplementary compression velocity threshold, said at least one supplementary compression side disc deflects, joining said at least one compression side annular recessed seat and said at least one inner compression side annular seat so as to create a loop-flow pathway through each of said supplementary channels in a direction corresponding to a piston stroke and further through said second channels.