Abstract: This invention relates to dispensing apparatus for use with pressurised dispensing containers and in particular, but not exclusively, for apparatus for dispensing orally inhaled medicinal products in aerosol forms. The apparatus comprises a housing (4) adapted to receive a pressurized dispensing container (2) and a mouth piece (11). Valve means (28) is provided, moveable between a first position in which a duct is closed and a second position in which a duct is open, and a flow sensor being activatable, by means of an air flow created when a user applies suction to the mouth piece, to move the valve means (28) into its second position. Wherein the flow sensor comprises a diaphragm (60) and the diaphragm and/or housing is provided with at least one aperture (64), wherein the diaphragm comprises a first element (66) connected to the housing and a second element (62) axially slidably moveable relative thereto. The first and second diaphragm elements being connected by a flexible member (61).

Abstract: A device for providing pharmaceutical doses comprising a container, filed with a pharmaceutical composition including glyceryl trinitrate and 1,1,1,2-tetrafluoroethane, or 1,1,1,2,3,3,3-heptafluoropropane, as a propellant, and a valve arranged for delivering aerosol doses of said pharmaceutical composition to the exterior of the container, wherein at least a portion of the device is formed from a polyester.

Abstract: Inhalation apparatus for dispensing a product comprises a housing (2) having a cylindrical portion (6) adapted to receive a pressurized dispensing container (3) and a mouthpiece (7). The apparatus includes a duct (18) communicating with the container receiving portion for conveyance of product towards the mouthpiece. An air inlet valve provided by a vent hole (14) and an actuator (19) is provided and is biased with a first position sealing the air inlet. The actuator is manually movable to a second position in which the air inlet is unsealed and allows air to flow into the housing and through the mouthpiece for any user applied suction to the mouthpiece and to a third position for the dispensing of a product into the resulting air flow. The movement between the second and third positions delays the discharge of the product until air flow through the device has been established.