Dual-rigid-hollow-stem actuators in opposite-phase slurry pump d

Details Dual-rigid-hollow-stem actuators in opposite-phase slurry pump d Dual-rigid-hollow-stem actuators in opposite-phase slurry pump d

1985-11-25

1988-12-13

Garrett, Robert E.

Pumps

Motor driven

Relatively movable pumping members driven by relatively...

417517, 417900, 92110, 60369, 60374, 60381, 91523, F04B 1502, F04B 910, F15B 1306

Patent

active

047907282

ABSTRACT:
A slurry pump has slurry hopper and dual pumping cylinders. The slurry pumping members are driven by opposite-phase actuators. Each actuator has a rigid-hollow-stem partition dividing the space between the actuator plunger and the cylinder into two drive chambers of different areas selectively supplied with pressurized fluid to drive the plunger with a selected force and speed. An associated valve shuts off flow to one of the drive chambers and is controlled at any given time to occupy the same position as a corresponding valve of the other actuator. The valves coordinate supply of fluid to corresponding drive chambers on alternate strokes of two actuators.

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