Rotary piston compressor

A rotary piston compressor for compressing gas, the rotary piston compressor comprising:

• a working housing;
• a rotary piston;
• the working housing has a housing side wall and two housing covers arranged on oppositely situated sides of the housing side wall;
• a side wall face of the housing side wall and a respective planar sealing face of the respective housing cover enclose a working chamber arranged in the working housing;
• and
• an eccentric on which the rotary piston is rotatably mounted in the working chamber;
• a gas inlet for introducing the gas to be compressed into the working chamber;
• a gas outlet with a pressure-relief outlet valve for discharging the compressed gas from the working chamber;
• the rotary piston has two piston bases, which face toward a respective one of the planar sealing faces of the housing covers, and a piston lateral surface which faces toward the side wall face of the housing side wall;
• a respective planar-seal receiving channel is formed in the piston bases;
• a planar seal is arranged in each of the planar-seal receiving channels, the planar seals each have a seal surface for contacting one of the planar sealing faces of the housing covers;
• wherein to press the seal surface of the respective planar seal against the respective planar sealing face, lateral-surface openings are formed in the piston lateral surface of the rotary piston, the lateral-surface openings have a pressure-transmitting connection to the respective planar-seal receiving channel via pressure leadthrough lines, which are formed inside the rotary piston and each open into the respective planar-seal receiving channel on a side of the respective planar seal that faces away from the seal surface;
• and
• wherein the rotary piston has two or more corner regions, and the planar seals are each sealed, with respect to the planar-seal receiving channel that receives them, in the corner regions of the rotary piston on a side thereof facing away from the respective seal surface.