Bearing extraction device for a suction press roll

Claim 1

A SUCTION ROLL COMPRISING, A ROTABLE PERFORATED CYLINDRICAL SHELL, AN END WALL MOUNTED ON SAID SHELL HAVING AN AXIALLY EXTENDING CYLINDRICAL BORE FORMED THEREIN OPENING AT ONE END THEREOF TO THE INNER FACE OF SAID END WALL AND CLOSED AT THE OTHER END THEREOF, A SUCTION BOX CO-ACTING WITH SAID SHELL AND ADAPTED TO CONTACT THE INTERIOR OF SAID SHELL TO CONFINE AN AREA THEREOF, A JOURNAL FIXEDLY MOUNTED ON SAID BOX AND EXTENDING INTO SAID BORE, ANTI-FRICTION BEARING MEANS INTERPOSED BETWEEN SAID JOURNAL AND THE WALL OF SAID BORE AND COMPRISING AN OUTER RACE FRICTIONALLY FITTED IN THE WALL OF SAID BORE AND AN INNER RACE RECEIVING SAID JOURNAL, AXIALLY MOVABLE PISTON MEANS SLIDABLY CARRIED IN SAID BORE BETWEEN SAID BEARING MEANS AND THE CLOSED END OF SAID BORE AND ENGAGEABLE WITH SAID BEARING MEANS, SAID PISTON MEANS HAVING AN OUTER PERIPHERAL WALL BEING IN FLUID SEALING RELATIONSHIP WITH THE WALL OF SAID BORE, AND HYDRAULIC MEANS COMMUNICATING WITH SAID BORE BETWEEN SAID PISTON MEANS AND THE CLOSED END OF SAID BORE TO PRESSURIZE SAID BORE AND TO MOVE SAID PISTON MEANS INTO ABUTTING ENGAGEMENT WITH SAID BEARING MEANS TO URGE SAID BEARING MEANS OUT OF SAID BORE.