Astrazeneca Ab

Orest Lastow

Johan Remmelgas

John Briant

Per Arne Kjellgren

Mårten Svensson

Patrick Campbell

Charles Cooke

Christopher Groombridge

William Bakewell

Nicholas Harrison

James Daniel John

Nicholas Smartt

John Philip Briant

Lars Rune Gustav Arvidsson

Charles Brian Durier Cooke

Sven Mårten Jimmy Svensson

Björn Ullbrand

Inhaler

The present disclosure relates to a method for entraining in an airflow a medicament powder contained in a cavity having a cavity opening. Large airflow vortices are provided, for instance, by use of an obstacle in a flow passage, The airflow with large vortices is arranged to by-pass the cavity opening, thereby generating an eddy in the cavity which contributes to entraining the powder in said airflow. The present disclosure also relates to a medical dispenser, for instance an inhaler, in which the method may be performed.

Dispenser and method for entraining powder in an airflow

A device for inhalation of at least one air stream carrying a dose of medicament powder having a powder-containing cavity which opens into a flow passage. The flow passage is arranged to direct an inhalation air flow across the cavity opening. A circulating flow is thereby induced in the cavity by the phenomenon of shear driven cavity flow. Powder is entrained in the circulating flow and deaggregated before exiting the cavity and becoming entrained in the flow of air along the flow passage.

An inhaler which comprises a base having a plurality of consecutive sealed cavities containing medicament. Foil portions are on one side attached to the base for sealing the medicament within respective associated cavities. A plurality of separating elements are attached to the other side of the foil portions, each separating element being associated with a respective cavity for separating a foil portion from that cavity. Each separating element can be moved-away from its associated cavity so that the sealing foil portion is separated from the cavity which is thereby uncovered so that medicament contained therein is enabled to become entrained in a fluid flow, and then returned with the attached foil portion to cover its associated cavity. A method of operating an inhaler is also disclosed.

Inhaler comprising a base having a plurality of medicament containing sealed cavities

An inhaler, including a base having at least one air-tight, foil-sealed cavity containing medicament is disclosed. An actuator is engagable with a separating element attached to the foil, the actuator having an energized position in which it is biased towards an unloaded position so as to cause the separating element and attached foil to be moved away from the cavity. A latch has a first position, in which it latches the actuator in said energized position, wherein the latch is at least partly arranged in a flow path such that an inhalation flow through the flow path affects the latch to move from the first position to the second position. A method of dispensing a medicament from a sealed cavity inside an inhaler is also disclosed.

Inhalation device and method of dispensing medicament

A device for inhalation of at least one air stream carrying a dose of medicament powder. The device comprises a powder-containing cavity which opens into a flow passage. The flow passage is arranged to direct an inhalation air flow across the cavity opening. A circulating flow is thereby induced in the cavity by the phenomenon of shear driven cavity flow. Powder is entrained in the circulating flow and deaggregated before exiting the cavity and becoming entrained in the flow of air along the flow passage.

Entraining powder in an airflow

A device for inhalation of at least one air stream carrying a dose of medicament powder is provided. The device includes a flow passage passing a powder-containing cavity. A part of said flow passage propagates along a generally flat surface region. The flat surface region includes a cavity opening into said powder-containing cavity. The passing of an air stream along said flat surface region and outside said cavity generates an eddy in the cavity and the generated eddy contributes to deaggregation of the powder in said cavity and emptying of the powder from said cavity. Furthermore, a shear driven cavity principle is used in conjunction with such a device and a method of releasing medicament powder.

Device and method for deaggregating powder

An inhaler which comprises a base having at least one sealed cavity containing medicament and a foil portion comprising two sides, one side being attached to the base for sealing the medicament within the cavity. A separating element is attached to the other side of the foil portion for separating the foil portion from the cavity, the separating element having a first end and an opposite second end, wherein the separating element is movable to an intermediate tilted position in which said first end is moved-away from the cavity. The separating element is further movable from the intermediate tilted position to a removed position in which also said second end is moved-away from the cavity so that the foil portion is removed from the cavity which is thereby uncovered so that medicament contained therein is enabled to become entrained in a fluid flow.

Growing community of inventors

Lund, Sweden

Orest Lastow