Standpipe connection for centrifugal pumps

Claim 1

IN COMBINATION, A PUMP CASING DESIGNED FOR PUMPING LIQUIDS CONTAINING SOLID PARTICLES AND INCLUDING INTAKE AND DISCHARGE OPENINGS, AN ADJUSTABLE SLEEVE CONNECTED TO THE PUMP CASING AND IN COMMUNICATION WITH ONE OF SAID OPENINGS, A DISCHARGE PIPE, SAID ADJUSTABLE SLEEVE ASSEMBLY COMPRISING A TUBULAR DISCHARGE SLEEVE CONNECTED TO ONE OF THE PUMP CASING OPENINGS AT ONE END AND BEING OF SUBSTANTIALLY CONSTANT DIAMETER THROUGHOUT ITS LENGTH, A TUBULAR PACKING SLEEVE SLIDABLY AND TELESCOPICALLY RECEIVING THE OTHER END OF THE DISCHARGE SLEEVE IN ONE END PORTION THEREOF, THE OTHER END OF THE PACKING SLEEVE COMPRISING AN OUTWARDLY FLARED PORTION TERMINATING IN AN ANNULAR FLANGE CONNECTED TO THE DISCHARGE PIPE, THE CENTRAL PORTION OF THE PACKING SLEEVE BEING PROVIDED WITH AN ANNULAR RECESS EXTENDING TO THE INNER SURFACE OF THE FLARED PORTION, A FIRST LINING OF ELATOMERIC MATERIAL FILLING SAID ANNULAR RECESS AND EXTENDING OVER THE INNER SURFACE OF THE FLARED PORTION AND THE OUTER END OF THE FLANGE, THE OTHER END OF THE DISCHARGE SLEEVE BEING INTERNALLY FLARED AT THE SAME ANGLE AS SAID FLARED PORTION OF THE PACKING SLEEVE, A SECOND FLANGE PROVIDED ON THE ONE END OF THE DISCHARGE SLEEVE, A SECOND LINING OF ELASTOMERIC MATERIAL COVERING THE ENTIRE INNER SURFACE OF THE DISCHARGE SLEEVE AND EXTENDING OVER THE FLARED END THEREOF AS WELL AS THE SECOND FLANGE, THE END OF THE SECOND LINING REMOTE FROM SAID SECOND FLANGE EXTENDING RADIALLY OVER THE OTHER END OF THE DISCHARGE SLEEVE AND INTO SLIDING CONTACT WITH THE INSIDE OF THE FIRST LINING, ADJUSTABLE SECURING MEANS EXTENDING THROUGH SAID SECOND FLANGE AND PUMP CASING AND URGING THE SECOND FLANGE TOWARD SAID PUMP CASING SO AS TO COMPRESS A PORTION OF THE SECOND LINING THEREBETWEEN, A THIRD FLANGE PROVIDED ON THE ONE END PORTION OF THE PACKING SLEEVE BETWEEN THE FIRST FLANGE AND THE SECOND FLANGE, SAID THIRD FLANG BEING PROVIDED WITH A PLURALITY OF SPACED ARCUATE RECESSES CONCENTRIC ABOUT THE AXIS OF THE ADJUSTABLE SLEEVE, A PLURALITY OF ADJUSTING STUDS EACH HAVING ONE END RELEASABLY SECURED TO THE SECOND FLANGE AND A THREADED END EXTENDING THROUGH ONE OF THE ARCUATE RECESSES, A PAIR OF NUTS THREADED ON EACH STUD ON OPPOSITE SIDES OF THE THIRD FLANGE AND IN TIGHT ENGAGEMENT THEREWITH, SEALING MEANS BETWEEN THE ONE END PORTION OF THE PACKING SLEEVE AND THE OUTER SURFACE OF THE DISCHARGE SLEEVE, A LUBRICATING GROOVE FORMED IN THE INNER SURFACE OF THE PACKING SLEEVE AND CLOSED BY THE OUTER SURFACE OF THE DISCHARGE SLEEVE, AND MEANS PROVIDED ON THE PACKING SLEEVE FOR FILLING SAID GROOVE WITH LUBRICANT.