HYDRAULIC DAMPER WITH AN X-FLOW PISTON ASSEMBLY

According to the present invention there is provided a hydraulic damper (1) comprising: a tube (3) extending along an axis and filled with working liquid; a piston assembly (4) disposed slidably inside said tube (3) and dividing said tube (3) into a rebound chamber (11) and a compression chamber (12), and attached to a piston rod (5) extending outside of said tube (3); said piston assembly (4) including: a piston body (41) including at least two first channels (414) sloped with respect to said axis and extending between a compression side (4141) and a rebound side (4142), and at least two second channels (415) sloped with respect to said axis and extending between a rebound side (4152) and a compression side (4151); said compression side (4141) of each of said first channels (414) is positioned radially outward relative to said rebound side (4142) of each of said first channels (414), and said rebound side (4152) of each of said second channels (415) is positioned radially outward relative to said compression side (4142) of each of said second channels (415), thus forming a cross-flow arrangement through said piston body (41); at least one main rebound side disc (424) at least partially covering said rebound side (4142) of each of said first channels (414), and at least one main compression side disc (434) at least partially covering said compression side (4151) of each of said second channels (415); said piston body (41) further defining at least one supplementary channel (416) provided with a compression side (4161) and a rebound side (4162), said supplementary channel (416) being positioned radially inward with respect to said first channels (414) and said second channels (415); and at least one supplementary disc (421, 432) at least partially covering at least one of said rebound side (4162) and said compression side (4161) of said at least one supplementary channel (416), and wherein said at least one supplementary channel (416) is apt to be fluidly connected with said rebound chamber (11) and said compression chamber (12) during compression and/or rebound strokes of said damper (1), and said at least one supplementary disc (421, 432) comprises at least one supplementary rebound side disc (421), and at least one supplementary compression side disc (432).