US PATENT SUBCLASS 91 / 531
.~.~.~ With additional control valve in series with at least one separate control valve in supply line to one of motors

Current as of: June, 1999
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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}
530  DF  .~.~ Control means includes separate control valves for each working member {1}
531.~.~.~ With additional control valve in series with at least one separate control valve in supply line to one of motors

DEFINITION

Classification: 91/531

With additional control valve in series with at least one separate control valve in supply line to one of motors:

(under subclass 530) Apparatus and further including a second valve between the source and one of the motors, the second valve being disposed in serial relationship with respect to at least one of the control valves.