Driving apparatus comprising modified gear shape elliptic gear w
External axle rotary piston machine
Gear pumps and motors
Gear pumps and motors
Hydraulic gear pump with recesses in non-working gear flanks
Hydraulic machine
Roots type supercharger
Rotary piston blower having piston lobe portions shaped to avoid
Spur gear with epi-cycloidal and hypo-cycloidal tooth shapes
Trochoid oil pump