Abstract: The multi-sectional driveshaft for a multi-unit rotary piston mechanism has a plurality of driveshaft sections of identical configuration, arrangted co-axially with the end portion of one section telescopically engaging the end portion of a next adjacent section. Each section comprises an elongated body having an axial bore therethrough and an eccentric portion between the opposite end portions of the elongated body. One end portion is of reduced size with a shoulder extending normal to the axial bore. The other end portion of each section has a portion of the axial bore adjacent thereto of a size and configuration complementary to the one end portion for receiving and engaging the one end portion of the next adjacent section.

Abstract: The sealing grid system for a rotary piston mechanism of the Wankel type comprises apex seal assemblies and a plurality of seal strips slidably disposed in recesses in at least one face of the rotary piston. Each of the recesses are formed at the juncture of the peripheral surface of the rotary piston and the surface of one of the rotary piston faces and extend to communicate with next adjacent apex seal slots. A groove is formed in the bottom of each of the recesses to receive a biasing member, V-shaped in cross-section, which functions to both urge the associated seal strip outwardly of the recess and to seal the interstices between the seal strip and its recess. Each of the seal strips is dimensioned in length to abut the next adjacent apex seal blades.