Patent ID: 7273138

Claim:
A damping force variable valve for use in a damping force variable type shock absorber, comprising: a main valve provided between a high pressure section and a low pressure section, for allowing a flow of oil from the high pressure section into the low pressure section when the main valve is opened, the main valve being capable of being opened or closed depending on a pressure of the high pressure section, an initial preload and a pressure of a control chamber; a first variable orifice provided in the fluid path between the high pressure section and the control chamber, for controlling the pressure of the control chamber; a fixed orifice provided in the fluid path between the control chamber and the low pressure section; a second variable orifice provided in the fluid path between the high pressure section and the low pressure section; and wherein the first variable orifice and the second variable orifice are controlled by a sliding movement of a spool engaged with an actuator.