Directional hydraulic control valve

Claim 1

A DIRECTIONAL HYDRAULIC VALVE COMPRISING, A CASING HAVING A VALVE BORE AND AXIALLY SPACED RADIAL ENLARGEMENTS THEREOF PRESENTING, RESPECTIVELY, A FIRST AND SECOND INLET CHAMBER, A FIRST AND A SECOND TRANSFER CHAMBER, A FIRST AND A SECOND EXHAUST CHAMBER, AND A DELIVERY CHAMBER; INTEGRAL PASSAGE MEANS PRESENTING A FIRST INLET PASSAGE CONNECTED WITH SAID FIRST INLET CHAMBER; A SECOND INLET PASSAGE HAVING A PRIMARY BRANCH CONNECTED WITH SAID FIRST INLET CHAMBER AND WITH SAID FIRST AND SECOND TRANSFER, CHAMBERS, AND A SECONDARY BRANCH CONNECTED WITH SAID SECOND INLET CHAMBER, CHECK VALVE MEANS POSITIONED WITHIN SAID PRIMARY BRANCH AND COACTING THEREWITH FOR PREVENTING RETURN FLOW OF FLUID THERETHROUGH TO SAID SECOND INLET PASSAGE AND FLUID FLOW FROM SAID PRIMARY BRANCH INTO SAID FIRST INLET CHAMBER, AND A VALVE SPOOL IN SAID VALVE BORE AND PROVIDED WITH AXIALLY SPACED APART LANDS AND SAID LANDS BEING COOPERABLE WITH SAID BORE SO AS TO SELECTIVELY DIRECTED FLUID FLOW FROM SAID FIRST INLET CHAMBER AND DELIVERY CHAMBER TO SAID FIRST AND SECOND EXHAUST CHAMBERS, RESPECTIVELY; AND TO SELECTIVELY DIRECT FLUID FLOW FROM SAID FIRST AND SECOND INLET CHAMBER EITHER JOINTLY OR SEPARATELY TO SAID DELIVERY CHAMBER; SAID LANDS INCLUDING A FIRST INLET CHAMBER TO SAID FIRST FLUID PASSAGE FROM SAID FIRST INLET CHAMBER TO SAID FIRST EXHAUST CHAMBER, AND TO CONTROL FLUID FLOW FROM SAID FIRST TRANSFER CHAMBER TO SAID DELIVERY CHAMBER; SECOND AND THIRD LANDS OPERATIVE ALTENATELY TO CONTROL FLUID PASSAGE BETWEEN SAID SECOND INLET CHAMBER AND SAID SECOND TRANSFER CHAMBER; AND A FOURTH LAND OPERATIVE TO CONTROL FLUID PASSAGE BETWEEN SAID DELIVERY CHAMBER AND SAID SECOND EXHAUST CHAMBER.