Rotary to recipricating motion translator
Rotary to reciprocating motion converter
Rotary torque actuator
Rotary-to-linear-motion converter
Rotary/reciprocatory motion converter
Rotating eccentric weights vibrator system
Rotating horsehead for oilfield pumping unit
Rotating oscillatory motion power take-off
Rotational to linear actuator
Rotor composite engine
Safety attachment for the horsehead of an oil well pumping unit
Scotch yoke
Scotch yoke having a curved track
Scotch yoke mechanism and power transfer system
Scotch yoke mechanism for secure track sliding
Scotch yoke piston and crankshaft connection with floating crank
Scram release for a control rod
Screw drive
Screw jack
Self-propelled vibratory plate