Patent ID: 8308135

Claim:
Device for adjusting the height of a seat, particularly a seat of a motor vehicle, comprising: at least one actuator intended to be positioned between a fixed base and a base of the said seat, able to move relative to the fixed base, the said actuator being connected to at least one source of power via at least one control valve comprising at least one control member for controlling the pressurizing of the actuator and at least one control member for controlling the exhausting of the actuator, a cam associated with at least one means of driving as a function of a variation in height of the seat and with the valve control members, the cam being configured to have at least one neutral position in which the cam actuates no control member, and at least two active positions about the said neutral position, the active positions respectively corresponding to a pressurizing of the actuator when the cam has pivoted about the neutral position in a direction corresponding to a reduction in the height of the seat and to an exhausting of the actuator when the cam is pivoted about the neutral position in a direction corresponding to a raising of the height of the seat, the means of driving also being mounted so that the means can be disengaged in relation to the cam, wherein the control valve further includes at least one control member for controlling the pressurizing and at least one control member for controlling the exhausting of the actuator, each of the control members being configured to connect to a control lever for controlling the height of the seat so that the height can be controlled manually, actuation of the control members causing the means of driving to be disengaged in relation to the cam.