EP4098302A1 — Breath actuated inhaler

USPTO Abstract

A metered dose inhaler and in particular, a breath actuated metered dose inhaler, providing a valve port (1095) and a diaphragm (1000) for a pneumatic force holding unit of a breath actuated metered dose inhaler, a flap valve (36) for the canister fire system of a breath actuated metered dose inhaler, as well as methods for manufacturing and assembling the same. The valve port further comprises an annular boss (1100) with an inner wall defining a valve orifice channel (78), wherein the volume of the orifice channel defined by the inner wall of the boss is greater than about 12.7 % of the volume of the boss and/or wherein then inner wall defines a frustum of an imaginary cone with an apex angle of greater than about 20 degrees, preferably from about 22 degrees to about 35 degrees.