| 91 / | HD | MOTORS: EXPANSIBLE CHAMBER TYPE |
| 508 | DF | PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS {11} |
| 525 | DF | .~ With means to control the working fluid to one working member for movement relative to another without controlling the working fluid to the other working member by said means {4} |
| 528 | DF | .~.~ Control means is fluid pressure operated valve {1} |
| 529 | | .~.~.~ Fluid pressure operated valve controlled by a pilot valve |