Patent ID: 7770974

Claim:
A height adjustment device of a vehicle seat, which comprises a control valve means able to be switched over between different states of operation for governing the degree of filling of at least one compressed air actuator holding the seat body at a desired height and thereby providing an elastic supporting action in a vertical direction, at least one actuating member cooperating with at least one control cam slide being associated with the control valve means in such a manner that in accordance with use dependent alteration of the weight to be borne by the at least one compressed air actuator a relative movement causing the switching over of the control valve means takes place between a component bearing the at least one control cam slide and another component bearing the associated actuating member, wherein the relative movement is a linear movement wherein the component bearing the at least one control cam slide and the component bearing the at least one actuating member are guided in the direction of the relative movement relatively to one another in a linearly slidable manner, and wherein the at least one control cam slide is arranged on a control carriage which is a component of a linear unit which also comprises a guide body, the control carriage being guided on the guide body by linear guide means for linear movement in the direction of the relative movement, and the guide body bearing the at least one actuating member for the control valve means.