Scroll type fluid displacement apparatus

Scroll type rotary internal combustion engine

Scroll-type engine

Sealing intersecting vane machines

Sealing intersecting vane machines

Self-starting multifuel rotary piston engine

Self-starting multifuel rotary piston engine

Shaft power generator

Side pressure type rotary engine

Simplified multifunction component rotary engine

Single cycle elliptical rotary engine

Single cycle rotary engine with constant fuel feeding

Single stage or multi-stage expansion engine

Single-ended barrel engine with double-ended, double roller...

Sliding vane engine

Sliding-blade heat engine with vortex combustion chamber

Spherical engine

Spherical internal combustion engine

Split cycle engine

Split cycle heat engines