Piston ring assembly
Piston ring assembly
Piston ring assembly
Piston ring assembly
Piston ring assembly
Piston ring assembly and expander
Piston ring assembly and method of making same
Piston ring assembly for automotive internal combustion engine
Piston ring assembly for hydraulic mechanisms, particularly such
Piston ring assembly for stirling engine
Piston ring assembly with tangential expander
Piston ring construction
Piston ring device for use in a combustion engine of a vehicle
Piston ring device in internal combustion engine
Piston ring employing elastomeric sealing member within the ring
Piston ring for an internal combustion engine
Piston ring for internal combustion engine
Piston ring for internal combustion engine
Piston ring for piston engines
Piston ring for shock absorber