Pipeline cleaner inserter valve

Claim 1

A PIPELINE CLEANER VALVE COMPRISING A VALVE CASING HAVING A PAIR OF OPPOSITELY DISPOSED FITTINGS FOR COUPLING TO SECTIONS OF A PIPELINE, SAID CASING BEING PROVIDED WITH A CYLINDRICAL CHAMBER HAVING A FIRST AXIS EXTENDING AXIALLY WITHIN THE CURVED WALL OF SAID CHAMBER, FIRST AND SECOND ALIGNED FLUID PASSAGES EACH EXTENDING FROM ONE OF SAID FITTINGS AND OPENINGS INTO SAID CHAMBER ON OPPOSITED SIDES THEREOF AND HAVING A COMMON SECOND AXIS INTERSECTING SAID FIRST AXIS AT RIGHT ANGLES, AND A THIRD PASSAGE OPENING INTO SAID CHAMBER FOR ADMISSION AND REMOVAL OF A PIPELINE CLEANING PIG, SAID THIRD PASSAGE HAVING A THIRD AXIS, INTERSECTING SAID FIRST AND SECOND AXES AT RIGHT ANGLES, AN ANNULAR SEALING RING MOUNTED IN SAID CASING ENCIRCLING THE OUTER END OF SAID THIRD PASSAGE, A CLOSURE DISC HAVING A SEALING SURFACE PORTION ENGAGING SAID SEALING RING TO CLOSE AND THIRD PASSAGE, A RING NUT THREADEDLY ENGAGING SAID CASING AND BEARING AGAINST SAID CLOSURE DISC TO PRESS SAID SEALING SURFACE PORTION OF SAID CLOSURE DISC AGAINST SAID SEALING RING, THE EDGE OF SAID CLOSURE DISC AND A PORTION OF THE INNER SURFACE OF SAID RING NUT DEFINING A PERIPHERAL PASSAGEWAY ADJACENT SAID CLOSURE DISC SEALING SURFACE PORTION ENGAGING SAID SEALING RINGS, SAID RING NUT HAVING AT LEAST ONE BLEED APERTURE OPENING EXTERNALLY AND COMMUNICATING WITH SAID PASSAGEWAY, BEARINGS MOUNTED IN SAID CASING AT OPPOSITE ENDS OF SAID CYLINDRICAL CHAMBER AND ARRANGED ABOUT SAID FIRST AXIS, A CYLINDRICAL VALVE PLUG DISPOSED WITHIN SAID CYLINDRICAL CHAMBER AND HAVING AXIAL BEARING PROJECTIONS AT EACH END ENGAGING SAID BEARINGS AND SUPPORTING SAID VALVE PLUG IN AXIAL ALIGNMENT WITHIN SAID CHAMBER FOR ROTARY MOVEMENT ABOUT SAID FIRST AXIS, SAID CYLINDRICAL VALVE PLUG BEING PROVIDED WITH A TRANSVERSE BORE EXTENDING DIAMETRICALLY THROUGH SAID PLUG AND HAVING A FOURTH AXIS LYING IN A PLANE DEFINED BY SAID SECOND AND THIRD AXES, AT LEAST ONE OF SAID BEARING PROJECTIONS EXTENDING EXTERNALLY OF SAID CASING FOR ROTATING SAID VALVE WITH SAID A FIRST POSITION ALIGNING SAID FOURTH AXIS WITH SAID SECOND AXIS AND REGISTERING SAID FOURTH AXIS WITH SAID AND SECOND PASSAGES TO PROVIDE A FLUID PATH THROUGH SAID VALVE, AND TO A SECOND POSITION ALIGNING SAID FOURTH AXIS WITH SAID THIRD AXIS AND REGISTERING SAID BORE WITH SAID THIRD PASSAGE, AND SEALING MEANS AT THE PERIPHERY FOR SAID FIRST AND SECOND PASSAGES ADJACENT SAID CHAMBER MAKING SEALING CONTACT WITH SAID FIRST AND SECOND PASSAGES RESPECTIVELY AND PROJECTING INTO SAID CHAMBER AND MAKING SEALING CONTACT WITH SAID VALVE PLUG.