Variable leverage oil field pump jack
Variable loading roller
Variable lobe cam mechanism
Variable lock differential
Variable mass flywheel mechanism
Variable mechanical advantage torque arm
Variable mechanical vibrator
Variable mechanism for mounting angle housed gyro-sensor and...
Variable moment vibrator usable for driving objects into the gro
Variable oscillator drive mechanism
Variable output transmission
Variable phase and oscillatory drives
Variable phase couplings
Variable planetary transmission for a motorcycle or remote-contr
Variable position detent mechanism for a control lever
Variable position detent mechanism for a control lever
Variable position hand control mount for operator controls
Variable positive drive transmission
Variable power transmission for converting reciprocating motion
Variable preload ball drive