Patent ID: 7438086

Claim:
Control valve apparatus for coupling pressurized fluid to first and second actuators, comprising: a first double valve comprising: a first inlet for receiving said pressurized fluid; a first outlet for coupling with said first actuator; a first exhaust; a first valve element having a first inlet poppet and a first flow restrictor; a second valve element having a second inlet poppet and a second flow restrictor; a first crossover passage fluidically coupling said first flow restrictor to said second inlet poppet, and a second crossover passage fluidically coupling said second flow restrictor to said first inlet poppet; a second double valve comprising: a second inlet for receiving said pressurized fluid; a second outlet for coupling with said second actuator; a second exhaust; a third valve element having a third inlet poppet and a third flow restrictor; a fourth valve element having a fourth inlet poppet and a fourth flow restrictor; a third crossover passage coupling said third flow restrictor to said fourth inlet poppet; and a fourth crossover passage coupling said fourth flow restrictor to said third inlet poppet; a first pilot fluidically coupled to said first valve element, said first pilot having a first pilot fluid inlet; a second pilot fluidically coupled to said second valve element, said second pilot having a second pilot fluid inlet; a third pilot fluidically coupled to said third valve element, said third pilot having a third pilot fluid inlet; a fourth pilot fluidically coupled to said fourth valve element, said fourth pilot having a fourth pilot fluid inlet; a first interconnection fluidically coupling said first crossover passage with said third pilot fluid inlet; a second interconnection fluidically coupling said second crossover passage with said fourth pilot fluid inlet; a third interconnection fluidically coupling said third crossover passage with said first pilot fluid inlet; and a fourth interconnection fluidically coupling said fourth crossover passage with said second pilot fluid inlet.