High-pressure bleed valve

Claim 1

A HIGH-PRESSURE BLEED VALVE HAVING A MAIN BODY PROVIDED WITH A GENERALLY L-SHAPED FLOW PASSAGE THERE THROUGH HAVING AN INLET LEG AND AN OUTLET LEG AND INCLUDING FLOW PORT MEANS ADJACENT THE JUNCTION OF SAID LEGS, SAID PORT MEANS INCLUDING A LONG SLIGHTLY TAPERED FLOW PASSAGE DIVERGING TOWARD THE INLET END OF SAID INLET LEG AND WITH ITS SMALLER END HAVING A RELATIVELY SHORT CYLINDRICAL SECTION OPENING INTO SAID OUTLET LEG, A LONG VALVE MEMBER RECIPROCABLY SUPPORTED IN SAID PORT MEANS COMPRISING A METALLIC TIP AND A SUBSTANTIALLY LARGER MAIN BODY OF ELASTOMERIC MATERIAL HIGHLY RESISTANT TO EROSION BY HIGH-VELOCITY FLUID FLOW THEREPAST AND EACH HAVING ITS SIDES TAPERING AT THE SAME ANGLE AS THE JUXTAPOSED WALLS OF SAID PORT MEANS AND COOPERATING THEREWITH WHEN SEATED FIRMLY THEREAGAINST TO PROVIDE A LONG FRUSTO-CONICAL SEALING SURFACE, SPRING MEANS IN THE INLET LEG OF SAID FLOW PASSAGE ENGAGING THE UPSTREAM END OF SAID VALVE MEMBER AND URGING THE SAME TOWARD SEATING ENGAGEMENT WITH SAID PORT MEANS, MEANS FOR OPENING SAID VALVE MEMBER INCLUDING CAM-ACTUATED PLUNGER MEANS SUPPORTED AXIALLY OF SAID PORT MEANS ON THE DOWNSTREAM SIDE THEREOF AND HAVING A SMALL DIAMETER END CENTRALLY OF THE CYLINDIRCAL OUTLET END OF SAID PORT MEANS AND MOVABLE INTO ABUTMENT WITH THE METALLIC TIP OF SAID VALVE MEMBER TO OPEN THE SAME AGAINST THE HIGH-PRESSURE FLUID NORMALLY ACTING AGAINST THE UPSTREAM END THEREOF, AND THE SMALL DIAMETER END OF SAID PLUNGER COOPERATING WITH THE JUXTAPOSED WALL OF THE CYLINDRICAL SECTION OF SAID PORT MEANS TO PROVIDE AN ANNULAR FLOW PASSAGE OF SUBSTANTIALLY SMALLER AREA THAN THE AREA OF THE ANNULAR FLOW PASSAGE BETWEEN THE SIDE WALL OF THE ELASTOMERIC PORTION OF SAID VALVE MEMBER, WHEN OPEN, AND THE JUXTAPOSED WALL OF SAID PORT MEANS, THEREBY TO LIMIT THE FLOW VELOCITY PAST SAID ELASTOMERIC MATERIAL TO REDUCE THE EROSIVE EFFECTS OF FLUID FLOW THEREON.