Pneumatic outlet for unloading particulate materials

Claim 1

AN OUTLET STRUCTURE FOR PNEUMATICALLY UNLOADING PARTICULATE MATERIAL COMPRISING, A PAIR OF GENERALLY OPPOSED SIDE WALLS SLOPING DOWNWRDLY TOWARD EACH OTHER IN A GENERALLY SMOOTH RELATION AND HAVING SPACED LOWER PORTIONS, AN OPEN GENERALLY BOWL-SHAPED HOUSING EXTENDING DOWNWARDLY BETWEEN THE SPACE LOWER PORTIONS OF SAID SIDE WALLS, A METERING TUBE DISPOSED WITHIN SAID HOUSING AND HAVING A SLOT EXTENDING LONGITUDINALLY THEREOF TO RECEIVE THE PARTICULATE MATERIAL FLOWING DOWNWARDLY ALONG THE SIDE WALLS FOR PNEUMATIC UNLOADING, MEANS OF ROTATE SAID TUBE ABOUT ITS LONGITUDINAL AXIS TO POSITION THE SLOT IN THE AREA BETWEEN THE LOWER PORTIONS OF SAID SIDE WALLS THEREBY TO PERMIT THE PARTICULATE MATERIAL TO FLOW INTO THE TUBE FOR PNEUMATIC UNLOADING, A SEPARATE LIP MEMBER GENRALLY AT THE JUNCTURE OF EACH LOWER PORTION WITH THE HOUSING AND EXTENDING TOWARD THE PNEUMATIC TUBE WITH THE FREE EDGE THEREOF ADJACENT THE TUBE, SAID LIP MEMBERS BEING FORMED OF A RESILIENT MATERIAL HAVING A SUFFICIENT STIFFNESS TO SUPPORT THE ADJACENT PARTICUALTE MATERIAL WITHOUT COLLAPSING AND HAVING A BULBOUS END PORTION OPPOSITE SAID FREE EDGE WITH AN OPENING THEREIN EXTENDING LONGITUDINALLY OF THE METERING TUBE, A SLOT AT EACH JUNCTURE FACING THE ADJACENT METERING RUBE AND RECIEVING THE BULBOUS END PORTION OF THE ADJACENT LIP MEMBER, AND LIP SECURING MEANS EXTENDING WITHIN THE OPENING OF EACH LIP MEMBER TO SECURE THE LIP MEMBERS ADJACENT SAID JUNCTURES FOR FLEXING MOVEMENT RELATIVE TO SAID SIDE WALLS EXTENDING THE LIP MEMBERS FLEX TO PERMIT THE PARTICULATE MATERIAL TO PASS BETWEEN THE LIP MEMBERS AND THE ADJACENT TUBE WHEN THE PARTICULATE MATERIAL TENDS TO BIND BETWEEN THE LIP MEMBERS AND TUBE.