Patent ID: 8770359

Claim:
A colloidal damper comprising: a cylinder having a through-hole; a piston guided and supported by the cylinder during its reciprocating movement inside the through-hole, and defining a closed space in association with the cylinder; a cartridge detachably inserted into the through-hole of the cylinder, the cartridge being hollow; a liquid contained in the closed space and in an inner space inside the cartridge; and a porous body housed in the inner space inside the cartridge, the cartridge comprising: a case including a portion detachably inserted into the through-hole of the cylinder, wherein the portion and the through-hole are configured such that the cartridge can be removably attached to the cylinder, and the case is hollow at both ends; a lid connected to one of the opened ends of the case; and a filter connected to the other opened end of the case, and inserted into the through-hole of the cylinder together with the case, the porous body absorbing inside it the liquid when the liquid is pressurized by the piston, and discharging outside it the liquid when the liquid is depressurized, the filter having a plurality of first pores, and each first pore having a diameter smaller than an outer diameter of the porous body.