Positively actuated valve means

Claim 1

IN APPARATUS OF THE CLASS DESCRIBED, A CLOSED BODY HAVING INLET AND OUTLET OPENINGS THEREIN FOR THE GRAVITATIONAL MOVEMENT OF PARTICLE-FORM SOLID MATERIALS THERETHROUGH, MEANS FORMING A CLOSURE SEAT WITHIN SAID BODY, FLUID JET MEANS FOR SWEEPING THE END OF SAID CLOSURE SEAT AND DISCHARGING THROUGH THE OUTLET OPENING OF SAID BODY, A CLOSURE MEMBER PIVOTABLE ABOUT A TRANSVERSE AXIS AND ROTATABLE TO ENGAGE SAID SEAT IN CLOSING RELATIONSHIP, A CAMMING SURFACE BELOW SAID TRANSVERSE AXIS AND INTEGRALLY FORMED ON SAID CLOSURE MEMBER, A BAIL-LIKE ELEMENT OPERABLE TO CONTINUOUSLY ENGAGE SAID CAMMING SURFACE AND MOVABLE THROUGH AN ARC HAVING AN AXIS PARALLEL TO THE AXIS OF AND EFFECTIVE TO LOCK SAID CLOSURE MEMBER AGAINST SAID SEAT WHILE CONTACTING ONE END PORTION OF SAID CAMMING SURFACE AND TO POSITIVELY OPEN SAID CLOSURE MEMBER RELATIVE TO SAID SEAT WHEN CONTACTING THE OPPOSITE END PORTION OF SAID CAMMING SURFACE, A FLUID ACTUATED POWER PISTON CONNECTED TO SAID BAIL-LIKE ELEMENT TO ROTATE SAID ELEMENT THROUGH ITS ARC OF MOVEMENT, AND MEANS FOR ACTUATING FLOW OF FLUID THROUGH SAID JET MEANS IN TIMED COORDINATION WITH THE ACTUATION OF SAID POWER PISTON.