Injection mold locking device

Claim 1

INJECTION MOLDING APPARATUS COMPRISING FIRST AND SECOND PLATENS, SAID FIRST AND SECOND PLATENS ADAPTED TO HAVE MOUNTED THEREON COMPLEMENTARY FACING MOLD SECTIONS, ONE OF SAID PLATENS COMPRISING FIRST AND SECOND GENERALLY PLATE-LIKE MEMBERS HAVING CONTACTING SURFACES, ONE OF SAID PLATE-LIKE MEMBERS DEFINING A SUBSTANTIALLY SHALLOW CYLINDRICAL CAVITY CENTRALLY THEREOF, THE OTHER OF SAID PLATELIKE MEMBERS HAVING A CYLINDRICAL PROJECTION EXTENDING PART WAY INTO SAID CAVITY, AN EXPANSIBLE CELL IN SAID CAVITY, SAID CELL COMPRISING A PLATE-LIKE MEMBER HAVING SUBSTANTIALLY PARALLEL SURFACES ON EITHER SIDE THEREOF AND A PORT DEFINED THEREIN, A FLUID PRESSURE CONDUIT COMMUNICATING WITH SAID PORT AND EXTENDING FROM ONE SIDE THEREOF, AN ELASTOMERIC MATERIAL CAST ABOUT AND ENVELOPING SAID MEMBER AND A PORTION OF SAID CONDUIT, SAID MATERIAL BEING CAST IN THE SHAPE AND SIZE OF THE CAVITY, SAID MATERIAL BEING BONDED TO THE SURFACE OF SAID MEMBER FROM WHICH SAID CONDUIT EXTENDS AND UNBONDED TO THE OTHER SIDE THEREOF, THE UNBONDED SIDE OF SAID MEMBER AND SAID MATERIAL BEING ARRANGED TO RECEIVE FLUID PRESSURE THROUGH SAID CONDUIT AND PORT TO EXPAND SAID CELL AND DEFINE AN EXPANSIBLE PRESSURE CHAMBER, SAID ELASTOMERIC MATERIAL AND SAID PLATELIKE MEMBER VOLUMETRICALLY FILLING SAID CAVITY, MEANS FOR LIMITING MOVEMENT OF SAID PLATENS FROM EACH OTHER, AND MEANS FOR INTRODUCING FLUID UNDER PRESSURE TO SAID CONDUIT TO EXPAND SAID CELL AND FORCE SAID FIRST AND SECOND PLATELIKE MEMBERS APART.