Radial seal of a rotary piston engine

A radial seal for a rotary piston engine having a trochoidal-shaped casing inner surfacing and multicorner piston means, with which sealing strips are arranged in radial grooves having groove walls including groove side walls in the corners of the piston means;

• the sealing strips engage under pressure of the operating chambers against the casing inner surfacing and respectively against a groove side wall dependent upon direction of higher pressure-respectively lower-pressure relationship therewith;
• and the sealing strips have radially separate sealing strip pieces and have perforations between sealing surfaces which are lying in the groove and come into engagement against the groove walls;
• the improvement therewith comprising:
• filler pieces disposed in between radially separate sealing strip pieces, said filler pieces being installed with nominal clearance in the perforations in the sealing strip, said filler pieces being narrower in peripheral direction than the dimensioning of the sealing strip;
• and
• a spring means holding the filler pieces in continuous engagement along an upper part of said sealing strip.