PNEUMATICALLY OPERATED OSCILLATOR

摘要

T I T L E PNEUMATICALLY OPERATED OSCILLATOR A pneumatically operated oscillator is used as a linear motor to operate a single or a plurality of linear positive displacement pumps having plunges. The oscillator has a single acting pneumatic piston that works against a spring to force the plunges in their pressure strokes. The spring effects the return stroke which is damped by a hydraulic circuit that has an adjustable restriction. The work stroke is undamped and fast compared with the spring actuated return stroke. Variations in the pressure of the operating air affects the work strokes, but since the work strokes are many times faster than the return strokes, variations in the air pressure have little effect on the frequency .