Abstract: A side channel compressor with an impeller with delivery blades that has a seal to prevent leakage between the impeller and the impeller housing. A hub supporting the impeller connects it to a drive shaft. A housing surrounds the impeller, which rotates therein. A sealing device is provided between impeller and housing. The impeller is provided with a bearing ring that overhangs the hub. The overhanging portion of the bearing ring contacts a sealing ring held against a contact surface of the housing by a retaining ring. The retaining ring can be fastened to the housing by screws. The bearing ring can be provided with a corner recess to more securely engage the sealing ring.

Abstract: An improved side channel compressor wherein the compressor has a side channel with inlet and outlet openings and a rib projecting in the axial direction into the channel and wherein the improvement comprises providing that the rib have a height which is from 10 to 25 percent of the depth of the side channel and arranging the rib approximately mid-way between the inlet and outlet openings.