Patent ID: 7255211

Claim:
A dashpot with amplitude-dependent shock absorption for a wheel of a vehicle, comprising: a working piston; a cylindrical pressure compensation chamber hydraulically parallel with said working piston; an axially displaceable floating piston partitioning said pressure compensation chamber; an axial central bore extending through said floating piston; a single resilient bumper for a face of said floating piston and in said axial central bore; said bumper being vulcanized into said bore; said bumper being a central spherical bulge covering said face of said floating piston; said floating piston having a body with a stationary stop comprising a ring extending beyond said face; said floating piston having a body with an outer surface coated by a material having substantially good friction resistant properties; compression and decompression compartments, said pressure compensation chambers communicating hydraulically at at least one end with one of said compression and decompression compartments through an auxiliary central bore having a blinded end adjacent to said pressure compensation chamber and communicating with said chamber through a further bore sloping in relation to a bottom edge of said chamber; a piston rod connected to said piston; a separate housing at an end of said piston rod, said pressure compensation chamber being in said separate housing; said housing having a bore, and an end of a bolt extending out of said piston rod being in said bore in said housing; said bore in said housing being sufficiently narrow to provide a tight fit between said bore in said housing and said bolt.