Patent ID: 7395836

Claim:
Hydraulic assembly, situated in the housing of which are a continuation bore embodying a first pressure side, a threaded bore embodying a second pressure side, and between the first pressure side and the second pressure side, a nonreturn valve having an external thread which is formed on a first cylindrical portion of a cylindrical valve housing and can be screwed into the threaded bore, a passage duct for a hydraulic fluid flow being formed, between a side wall of the threaded bore and a first region of material removal of the lateral surface of the cylindrical valve housing, in a plurality of angular segments (α 1 , α 2 , α 3 and α 4 ) of the valve housing, wherein the first regions of material removal are continued in a second cylindrical portion adjoining the first cylindrical portion and serve, with a plurality of second regions of material removal situated between the first regions of material removal exclusively in the second cylindrical portion, as engagements for a tool for screwing the nonreturn valve into the threaded bore.