Patent ID: 8770363

Claim:
A pressure regulator for a shock absorber valve, in which the pressure regulator comprises an axially movable first valve part and a first seat, which are arranged in a valve housing in such a way that an adjustable flow opening is created between the first valve part and the first seat, and in which the flow opening is arranged to restrict a damping medium flow and the flow opening size of which is determined by a force balance on the first valve part principally or partially created by the sum of an actuating force and the force from a spring arrangement comprising a first spring having a first spring constant and a second spring having a second spring constant acting upon the first movable valve part counter to the action of a counterholding pressure regulator force, characterized in that the counterholding pressure regulator force is determined by the spring characteristics of both the first and the second spring, in which the first spring interacts with the actuating force throughout stroke and the second spring has a limited working range defined by possible axial deformability of the second spring such that it only interacts with the actuating force and at the same time works in series with the first spring in an initial stroke close to the seat which is defined by the limited working range of the second spring; wherein the first valve part and at least a part of the second spring bear against each other and move in tandem as a unit during the initial stroke until the second second spring has reached a basic position where no forces are acting upon the spring.