Non-contact vane-type fluid displacement machine with...
Offset thread screw rotor device
Oil pump
Oil seal construction for rotary mechanisms
Oil-free rotary displacement compressor
Oiless rotary scroll air compressor air inlet valve
Orbital device
Orbital engine
Orbital fluid translating device
Oscillating piston engine
Oscillating vane machine with improved vane and valve actuation
Pair of interacting gear rims of the rotary machine
Pendulum piston motor
Peripherally pivoted oscillating vane machine
Piston and slipper arrangement for hydraulic pump or motor
Pneumatic motor improvements and pneumatic tools...
Poly-induction energy turbine without back draught
Poly-induction energy-efficient motor
Polyturbine and anti-discharge
Polyturbine with backflow preventer ii