Patent ID: 7510381

Claim:
A twin-shaft, dry-running rotary piston machine comprising a housing; a pair of rotary pistons, each supported in the housing via a corresponding horizontal shaft and roller bearings with rolling elements located at each end of the corresponding shaft, each of said pair of rotary pistons configured to rotate about a horizontal axis that lies centrally along the corresponding horizontal shaft, the pair of rotary pistons constructed and arranged to mesh with each other in opposite directions, so as to define a conveying chamber, a pair of oil chambers located in said housing, positioned at opposite sides of said conveying chamber in an area of the roller bearings and provided to be at least in part filled with lubricating oil, two splash elements, with one splash element per oil chamber arranged on the shafts such that each shaft carries one splash element, and at least two connection channels that fluidly connect the pair of oil chambers with each other and that convey lubricating oil having a free oil level in the connection channels that lies below the horizontal axis of each of the pair of rotary pistons.