Patent ID: 6315173
Filing Date: 2001-11-13
Classification: A61K,B65D,C21B,C22B,Y02P

Abstract:
A metering valve comprising:a valve body;a metering chamber;a valve stem;one or more stem seals;at least one orifice in the valve body; and,a ring having a trough disposed around the valve body, wherein the ring further includes an annular wall interrupted with a plurality of slots forming a plurality of vanes, wherein, upon shaking of the valve, the suspension flows around the plurality of vanes assisting in dispersion of drug particles in the suspension;wherein the metering valve is suitable for dispensing a suspension of drug particles in a liquid propellant, and,wherein the drug is a member selected from the group consisting of salmeterol, salbutamol, formoterol, ipratroprium, fluticasone, beclomethasone, budesonide, terbutaline, salts, esters and solvates thereof, and combinations thereof.