Extrusion press for hollow extrusions

Claim 1

EXTRUSION APPARATUS COMPRISING A MAIN RAM, A STATIONARY DIE HAVING AN OPENING THEREIN, SAID MAIN RAM BEING AXIALLY ALIGNED WITH SAID DIE OPENING AND RECIPROCALLY MOUNTED FOR MOVEMENT IN A FORWARD DIRECTION TOWARD SAID DIE OPENING AND IN A BACKWARD DIRECTION AWAY FROM SAID DIE OPENING, A BILLET CONTAINER AXIALLY ALIGNED WITH AND BETWEEN SAID DIE AND MAIN RAM, SAID MAIN RAM HAVING AN ANNULAR STEM ON THE END THEREOF FACING SAID DIE, SAID CONTAINER HAVING A PASSAGE THERETHROUGH, SAID STEM BEING SLIDABLY RECEIVABLE WITHIN SAID CONTAINER PASSAGE, AN ANNULAR SHEAR SLEEVE AXIALLY ALIGNED WITH AND POSITIONED WITHIN SAID STEM FOR RECIPROCAL MOVEMENT WITH RESPECT TO SAID STEM, A MANDREL AXIALLY ALIGNED WITH AND POSITIONED WITHIN SAID SHEAR SLEEVE FOR RECIPROCAL MOVEMENT WITH RESPECT TO SAID SHEA SLEEVE, MAIN RAM POWER MEANS FOR AXIALLY MOVING SAID MAIN RAM IN A FORWARD AND BACKWARD DIRECTION, SHEAR SLEEVE POWER MEANS FOR AXIALLY MOVING SAID SHEAR SLEEVE WITH RESPECT TO SAID MAIN RAM AND SAID MANDREL, AND MANDREL POWER MEANS FOR AXIALLY MOVING SAID MANDREL WITH RESPECT TO SAID SHEAR SLEEVE AND MAIN RAM.