HYDRAULIC DRIVE MECHANISM WITH AN ACCUMULATOR

Fluid is delivered under pressure by pump 1 to valve 2. Actuated by spring 3, spool 4 closes port a, and spring 6 actuates spool 5 to close passage d and open port b. The fluid forces back ball 7 and flows through pipeline f to accumulator 8. At this, rotary valve 9 is closed. Pressure increases in the system. Then fluid passing along passage k acts on spool 5, shifting it to open passage d and cl…