Pressure compensated control valves

In a multiple section control valve bank a control valve working section, an inlet section and an outlet section that are operatively connected to provide smooth proportional metering control over a wide band of operating pressures and simultaneous metering operation of two or more fluid actuated devices from a single fluid pressure source, said control valve working section having a pressure fluid inlet port on one side of said section, an inlet chamber connected to said inlet port, an outlet port on the opposite side of said section connected with said inlet port and chamber, first and second work ports adapted to be connected to a fluid actuated device first and second work chambers connected to said ports and spaced on opposite sides of said inlet chamber, first and second exhaust chambers on opposite sides of said work chambers from the inlet chambers, a pair of metering chambers between said work chambers, a pair of logic chambers with one chamber on each side of the pair of metering chambers between the pair of metering chambers and the work chambers, a main bore extending through and interconnecting at least all of said exhaust, work, logic and metering chambers, a valve element movable in said bore from a neutral position to first and second work positions for selectively connecting said chambers through said bore and establishing fluid communication therebetween whereby in a work position fluid flows from the inlet port through said inlet chamber to said pair of metering chambers and then through at least one of said logic chambers to one of said work ports, said inlet section having an inlet port adapted to be connected to a source of fluid pressure, an outlet port and chamber connected to said inlet port and to a valve section inlet port at all times, an exhaust port, a spaced by-pass chamber connected to said exhaust port, a signal chamber between said exhaust port and by-pass chamber, a bore extending through and connecting said chambers in said inlet section, a valve member movable in said bore between said signal chamber and said by-pass chamber effective to control fluid communicating from the inlet to the outlet port and being movable to a by-pass position by-passing fluid from the inlet through the by-pass chamber to said exhaust port, biasing means opposing the movement of said valve member to said by-pass position, a connection between said oulet port of said inlet section and said inlet port of said control valve section delivering fluid therebetween, logic means connecting the signal chamber of said inlet section and a logic chamber of said control valve whereby the pressure in said signal chamber is varied in accordance with the difference between the pressure in the inlet port of the inlet section and the fluid pressure at said logic chamber to vary the biasing means opposing movement of said inlet section valve member whereby the flow of fluid from the inlet port to the outlet port of the inlet section is varied by by-passing fluid, wherein the metering chambers are connected together by a generally U-shaped passage, the logic chambers are connected together by a similar generally parallel U-shaped passage and the two U-shaped passages intersect a passage generally transverse to the main bore connected to said inlet chamber.