Patent ID: 8251096

Claim:
A sliding-spool valve for controlling the hydraulic pressure at a working port to values between a low pressure and a high pressure, for which a valve spool is accommodated in a bore of a housing in a linearly movable manner and which has a low-pressure port, a high-pressure port and the working port, for which in the first position of the valve spool the working port is connected to the low-pressure port, while in a second position of the valve spool the working port is isolated from the two further ports, and also with a third position of the valve spool in which the working port is connected to the high-pressure port, wherein a plurality of radial bores which are exposable to throughflow are arranged in the valve spool and interact with a plurality of encompassing metering edges in the housing, wherein the valve spool has two cavities which are isolated from each other and exposable to throughflow independently of each other, wherein the one cavity is in permanent hydraulic communication with the high-pressure port and the other cavity is in permanent hydraulic communication with the working port.