Regenerative fluid pressure control valves

Claim 1

IN A CONTROL VALVE, A HOUSING HAVING A BORE EXTENDING THERETHROUGH AND OPEN AT EACH END TO RECEIVE AN ELONGATED SPOOL VALVE ELEMENT, A FLUID INLET IN SAID HOUSING EXTENDING TRANSVERSE TO SAID BORE AND INTERSECTING THE BORE INTERMEDIATE ITS ENDS, A FLUID OUTLET IN SAID HOUSING EXTENDING TRANSVERSELY OF SAID BORE AND INTERSECTING THE BORE AT A POINT ADJACENT TO BUT SPACED FROM THE INTERSECTION OF THE INLET PASSAGE, A PARALLEL FLUID INLET IN THE HOUSING SPACED FROM THE FLUID INLET AND ADAPTED WITH THE FLUID INLET TO RECEIVE HIGH PRESSURE FLUID FROM A SOURCE OF FLUID UNDER PRESSURE, A VALVE ELEMENT SLIDABLE IN SAID BORE, A PAIR OF HIGH PRESSURE OUTLETS INTERSECTING THE BORE ONE ON EITHER SIDE OF THE SAID FLUID INLET AND OUTLET, A PAIR OF EXHAUST OUTLETS IN THE HOUSING INTERSECTING THE BORE, ONE ADJACENT EACH OF THE HIGH PRESSURE OUTLETS, AND PASSAGE MEANS COMMUNICATING BETWEEN THE PARALLEL FLUID INLET AND THE BORE ADJACENT EACH OF THE HIGH PRESSURE OUTLETS, SAID VALVE ELEMENT BEING SHIFTABLE IN OPPOSITE DIRECTIONS LONGITUDINALLY OF THE BORE FROM A NEUTRAL POSITION IN WHICH FLUID PASSES DIRECTLY THROUGH THE FLUID INLET AND THE BORE INTO THE FLUID OUTLET TO A POWER POSITION ON ONE SIDE OF THE NEUTRAL POSITION IN WHICH FLUID IS DIRECTED FROM THE PARALLEL FLUID INLET THROUGH THE SAID PASSAGE MEANS TO ONE HIGH PRESURE OUTLET WHILE DIRECTING FLUID FROM THE OTHER HIGH PRESSURE OUTLET TO THE EXHAUST OUTLET ADJACENT IT AND TO A PAIR OF SUCCESSIVE POWER POSITIONS ON THE OPPOSITE SIDE OF THE NEUTRAL POSITION, THE FIRST OF WHICH DIRECTS, FLUID FROM THE PARALLEL FLUID INLET THROUGH THE PASSAGE MEANS TO THE OTHER HIGH PRESSURE OUTLET WHILE DIRECTING FLUID FROM THE SAID ONE HIGH PRESSURE OUTLET TO THE EXHAUST OUTLET ADJACENT IT AND THE SECOND, MOST REMOTE FROM THE NEUTRAL POSITION, WHICH DIRECTS FLUID FROM THE PARALLEL INLET THROUGH THE PASSAGE MEANS INTO SAID OTHER HIGH PRESSURE OUTLET AND SIMULTANEOUSLY DIRECTS FLUID FROM SAID ONE HIGH PRESSURE OUTLET INTO THE SAID PASSAGE MEANS TO SUPPLEMENT THE FLUID ENTERING THE PARALLEL FLUID INLET AND GOING TO SAID OTHER HIGH PRESSURE OUTLET.