Patent ID: 8752514

Claim:
A hydraulic valve for an oscillating motor adjuster of a camshaft, comprising: a piston inserted in a lengthwise displaceable manner in a borehole for distribution onto first and second working ports, a first port part of the first working port exiting the borehole for guiding hydraulic fluid into a first pressure chamber of an oscillating motor adjuster, a second port part of the first working port exiting the borehole for conducting the hydraulic fluid out from the first pressure chamber to a supply channel disposed inside the piston, a first port part of the second working port exiting the borehole for guiding the hydraulic fluid into a second pressure chamber of the oscillating motor adjuster directed opposite the first pressure chamber, a second port part of the second working port exiting the borehole for conducting the hydraulic fluid out from the second pressure chamber to the supply channel, two non-return valves disposed in a flow from the pressure chambers to each of the two second port parts, respectively, each non-return valve blocking the pressure in a direction from the supply channel pointing to the pressure chambers, wherein: the piston, in a first position for introducing the hydraulic fluid from the supply channel into the first pressure chamber, blocks the second port part of the first working port which is assigned to the first pressure chamber; and the piston, in a second position for introducing the hydraulic fluid from the supply channel into the second pressure chamber, blocks the second port part of the second working port which is assigned to the second pressure chamber.