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: An oil seal construction for a rotary mechanism including a seal ring receivable in an annular groove in an end face of the rotor of said mechanism with the ring having a pair of radially-spaced annular surfaces for sealing engagement with the adjacent side housing and with a ring of elastomeric material disposed in said oil seal groove behind the seal ring and also including a metallic spring disposed behind the elastomeric ring such that the metallic spring forces act through the elastomeric ring to urge the seal ring outwardly of the rotor groove.

Abstract: An internal combustion engine having an intake port with a valve movable to open and close the intake port and with the duration of the period in which the valve is fully open during each intake phase being varied to regulate the power output of the engine.