Abstract: An appliance intended to synchronize inhaling by the user of an aerosol device which sprays a dose of active element released from a regulating bottle includes a closing valve for restricting inhaling by the user through the appliance until the user activates the valve to release a dose of the active element from the bottle and provide for subsequent unimpeded inhalation. The appliance also includes a damper valve to allow the user to exhale through the appliance prior to attempting to inhale with the damper valve being positioned to be opened by the regulating bottle sliding in the appliance. Another form of the invention includes a runner which receives the regulating bottle with the runner serving to activate the regulating bottle to release the dose of the active element therefrom. The valve includes, in one form of the invention, at least one slot in the body of the appliance and one slot in the runner which slots may be brought into registry to allow the user to inhale.

Abstract: An inhalation device is provided for use with an aerosol container having a body portion and a discharge stem movable with respect to the body portion from a rest position in which discharge is prevented to an operative position in which discharge takes place. The device has a housing for the inhalation device, and an outlet provided in the housing through which a patient can inhale. A restraining and pressure-sensing member is provided in the form of a resiliently flexible plate. The plate has a first position in which it prevents relative movement between the discharge stem and the body portion to the operative position and a second position in which it permits such movement. The plate senses when a reduced pressure is produced through inhalation by the patient and moves from the first position to the second position in response thereto.