Patent ID: 9127741
Filing Date: 2015-09-08
Classification: F16F

Abstract:
1. A colloidal damper comprising: a cylinder; a piston guided and supported by the cylinder during its reciprocating movement inside the cylinder, and defining a closed space in association with the cylinder; a porous body having a large number of pores and being housed in the closed space; a working liquid contained in the closed space together with the porous body; a filter which allows the working liquid to pass through, but does not allow the porous body to pass through, and divides the closed space into a first closed space on the side where the piston executes its reciprocating movement, and a second closed space other than the first closed space; and a piezoelectric device installed in the second closed space, the working liquid flowing into the pores of the porous body when the working liquid is pressurized by the piston in association with the cylinder, and flowing out from the pores of the porous body when the working liquid is depressurized, the piezoelectric device being able to generate electrical power when compressed by an axial pressure and/or by a radial pressure, the piezoelectric device having a diametral ratio d wherein d