Control valve for hydraulic machinery

Claim 1

A CONTROL VALVE COMPRISING, IN COMBINATION: (A) A VALVE CASING DEFINING A CAVITY THEREIN, SAID CASING BEING FORMED WITH AN INLET COMMUNICATING WITH A FIRST PORTION OF SAID CAVITY, A FIRST AND A SECOND OUTLET RESPECTIVELY COMMUNICATING WITH A SECOND AND A THIRD PORTION OF SAID CAVITY, AND WITH A FIRST AND A SECOND RETURN OPENING RESPECTIVELY COMMUNICATING WITH A FOURTH AND A FIFTH PORTION OF SAID CAVITY; (B) SUPPORTING MEANS MOVABLE IN SAID CAVITY BETWEEN A FIRST AND A SECOND POSITION; (C) FIRST AND SECOND ANNULAR SEALING LIP MEMBERS RESPECTIVELY INTERPOSED IN SAID CAVITY BETWEEN SAID SECOND AND FOURTH AND BETWEEN SAID THIRD AND FIFTH PORTIONS THEREOF, SAID SEALING LIP MEMBERS SEALINGLY ENGAGING SAID VALVE CASING; (D) FIRST AND SECOND PLUNGER MEANS CONNECTED TO SAID SUPPORTING MEANS FOR MOVEMENT THEREWITH IN SAID CASING SAID FIRST PLUNGER MEANS BEING SEALINGLY RECEIVED IN SAID FIRST SEALING LIP MEMBER AND SAID SECOND PLUNGER MEANS BEING SPACED FROM SAID SECOND SEALING LIP MEMBER, WHEN SAID SUPPORTING MEANS IS IN SAID FIRST POSITION THEREOF, SAID SECOND PUNGER MEANS BEING SEALINGLY RECEIVED IN SAID SECOND SEALING LIP MEMBER AND SAID FIRST PLUNGER MEANS BEING SPACED FROM SAID FIRST SEALING LIP MEMBER WHEN SAID SUPPORTING MEANS IS IN SECOND POSITION THEREOF; (E) DISK VALVE MEANS CONNECTED TO SAID SUPPORTING MEANS FOR MOVEMENT THEREWITH FOR CONNECTING SAID FIRST PORTION OF SAID CAVITY TO SAID SECOND PORTION THEREOF, AND FOR SIMULTANEOUSLY SEALING SAID THIRD PORTION FROM SAID FIRST PORTION WHEN SAID SUPPORTING MEANS IS IN SAID FIRST POSITION THEREOF, AND FOR CONNECTING SAID FIRST AND THIRD PORTIONS OF SAID CAVITY WHILE SEALING SAID SECOND PORTION FROM SAID FIRST PORTION WHEN SAID SUPPORTING MEANS IS IN SAID SECOND POSITION THEREOF; (F) TWO ANNULAR GASKET MEMBERS OF RESILIENT MATERIAL SEALINGLY ENGAGING SAID CASING, SAID GASKET MEMBERS BEING INTERPOSED BETWEEN SAID FIRST CAVITY PORTION AND SAID SECOND AND THIRD CAVITY PORTIONS RESPECTIVELY FOR RESPECTIVE SEALING ENGAGEMENT WITH SAID DISK VALVE MEANS IN SAID SECOND AND FIRST POSITIONS OF SAID SUPPORTING MEANS, EACH OF SAID GASKET MEMBERS HAVING TWO ANNULAR FACES, ONE OF SAID FACES BEING OPPOSITE SAID DISK VALVE MEANS AND ENGAGEABLE THEREWITH BY MOVEMENT OF SAID SUPPORTING MEANS, AND THE OTHER FACE FACING AWAY FROM SAID DISK VALVE MEANS; (G) TWO RIGID TUBULAR SPACE MEMBERS IN SAID CASING, EACH SPACER MEMBER HAVING A FLANGE PORTION INWARDLY PROJECTING FROM SAID CASING, SAID PORTION ABUTTINGLY ENGAGING SAID OTHER FACE OF A RESPECTIVE GASKET MEMBER AND DEFINING AN OPENING, (1) SAID DISK VALVE MEANS INCLUDING TWO CONTACT FACE RESPECTIVELY ENGAGEABLE WITH SAID OPPOSITE FACES OF SAID GASKET MEMBERS AND ALIGNED WITH THE OPENINGS OF SAID FLANGE PORTIONS RESPECTIVELY IN THE DIRECTION OF MOVEMENT OF SAID SUPPORTING MEANS, THE CROSS SECTION OF EACH CONTACT FACE TRANSVERSELY OF SAID DIRECTION BEING GREATER THAN THE CROSS SECTION OF THE LIQUID FLANGE OPENING; AND (H) MOVING MEANS FOR MOVING SAID SUPPORTING MEANS BETWEEN SAID POSITIONS THEREOF.