Gear pump 6 delivers fluid at constant pressure to the left end of cylinder 1, and piston 2, together with table 3, travels to the right. Fluid exhausted from the right end of cylinder 1 passes through a groove of valve spool 4 to rotary valve 5. If valve 5 is positioned so that pipeline a is closed and pipeline b is open, valve spool 4 is shifted to the right by the pressure of the fluid and the fluid discharged from cylinder 1 drains to the tank. At this, table 3 travels at maximum speed. If valve 5 is positioned so that pipeline a is open and pipeline b is closed, valve spool 4 is shifted to the left by the pressure of the fluid, and the fluid delivered by pump 6 is discharged back to the tank. At this, table 3 stops. Thus, by changing the position of valve 5, it is possible to regulate the amount of fluid delivered to cylinder 1 and, consequently, the speed of travel of table 3.
$4148$CHP,Dr$