3m Innovative Properties Company

Gary D Mahon

Peter D Hodson

David J Greenleaf

Andrew M Bryant

Graham R Purkins

Gustavo H Castro

Eric A Baum

Heinz G Klein

A breath actuated metered dose inhaler device for use with an aerosol valve having a transient metering chamber.

Breath actuated aerosol dispensers

The present invention relates to a novel design for a metering valve that provides improved consistency of formulation delivery. Generally, the metering valve includes (a) a valve stem that generally defines a longitudinal axis and includes a body portion having a metering surface, wherein the longitudinal axis and a plane tangential to at least a portion of the metering surface define an angle from about 2&#xb0; to about 90&#xb0;; and (b) a valve body having an internal chamber defined at least in part by the body wall and includes a metering portion configured to substantially conform to the metering surface of the valve stem.

Metering valve for a metered dose inhaler providing consistent delivery

Valve stems for use in an aerosol metering valve are described herein. The valve stems include structures designed to limit the likelihood and extent to which a gasket can intrude into an opening in the valve stem. The valve stems described herein also limit the likelihood and extent of damage to the gasket caused by repeated use of the metering valve.

Valve stem for use in a metering valve of a metered dose inhaler

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Wilford, United Kingdom

Gary D Mahon