Directional control valve

Claim 1

IN COMBINATION (A) A VALVE HOUSING CONTAINING A VALVE BORE INTERSECTED BY FIRST, SECOND, THIRD AND FOURTH LONGITUDINALLY SPACED PASSAGES, THE THIRD AND FOURTH PASSAGES BEING INTERMEDIDATE THE OTHER TWO; (B) A VALVE PLUNGER RECIPROCABLE IN THE BORE AND FORMED WITH AN ANNULAR PERIPHERAL GROOVE THAT DEFINES TWO SPACED VALVE LANDS HAVING OPPOSING TRANSVERSE END FACES; (C) A FIFTH PASSAGE FORMED IN ONE OF SAID LANDS; (D) A SEPARATE SIXTH PASSAGE FORMED IN SAID ONE LAND AND TERMINATING AT ITS OPPOSITE ENDS AT FIRST AND SECOND OPENINGS FORMED IN THE OUTER PERIPHERAL SURFACE AND IN THE TRANSVERSE END FACE, RESPECTIVELY, OF SAID LAND; (E) THE VALVE PLUNGER HAVING, A FIRST POSITION IN WHICH SAID ONE LAND ISLOATES THE THIRD PASSAGE FROM THE OTHER PASSAGES AND THE PERIPHERAL GROOVE INTERCONNECTS THE SECOND AND FOURTH PASSAGES, A SECOND POSITION IN WHICH SAID ONE LAND ISOLATES THE SECOND PASSAGE FROM THE FOURTH PASSAGE, THE FIFTH PASSAGE INTERCONNECTS THE THIRD AND FOUTH PASSAGES, AND THE FIRST OPENING REGISTERS WITH THE SECOND PASSAGE, ANDA THIRD POSITION IN WHICH THE OTHER LAND ISOLATES THE SECOND PASSAGE FROM THE FOURTH PASSAGE, THE PERIPHERAL GROOVE REGISTERS WITH THE FOURTH PASSAGE, THE FIFTH PASSAGE INTERCONNECTS THE FIRST AND THIRD PASSAGES, AND THE FIRST OPENING REGISTERS WITH THE THIRD PASSAGE; AND (F) AN ANNULAR VALVE HEAD ENCIRCLING THE PLUNGER AND LOCATED IN SAID ANNULAR PERIPHERAL GROOVE, SAID VALVE HEAD BEING GUIDED FOR SLIDING MOVEMENT ALONG THE INNER PERIPHERAL SURFACE OF SAID GROOVE BETWEEN FIRST AND SECOND POSITIONS IN WHICH, RESPECTIVELY, IT CLOSES AND OPENS SAID SECOND OPENING.