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US 2003/0116155 A1Published application
Inhaler
AssigneeAstraZeneca AB
InventorJorgen Rasmussen
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AssigneeAstraZeneca AB
InventorJorgen Rasmussen
Estimating the term…
An inhaler for delivery by inhalation of a medicament from the canister which is compressible to deliver a dose of medicament. The inhaler comprises a housing (1) for holding a canister (2) having a generally cylindrical body (3) with the cylindrical axis of the body (3) in predetermined direction and a loading mechanism for loading a resilient loading element (7) which is arranged, when loaded, to bias compression of the canister (2). The loading mechanism comprises a loading member (8) engaging the resilient loading element (7) and two contact members (9) movable relative to the housing (1) in a movement direction orthogonal to said predetermined direction and arranged to drive the loading member (8) to load the resilient loading element (7), through a cam arrangement between the contact member (8). The cam arrangement may allow for the ratio of the amount of driven movement of the loading member (8) to the amount of mount of the contact members (9) to be non-linear, preferably reducing over the driven movement to compensate for the increasing resistance by the resilient loading element.
An inhaler for delivery by inhalation of a medicament from a canister which is compressible to deliver a dose of medicament, the inhaler comprising
An inhaler according to any one of the preceding claims, wherein the loading member is driven to move in a direction orthogonal to said movement direction.
An inhaler according to any one of the preceding claims, wherein the resilient loading element biases a canister engagement member engageable with a canister held in the housing to compress the canister.
An inhaler according to any one of the preceding claims, wherein the canister engagement member is a lever rotatable about an axis parallel to the movement direction of the at least one contact member.
An inhaler according to any one of the preceding claims, wherein the cam arrangement is arranged to hold the at least one contact member in place at the end of its movement.
An inhaler according to any one of the preceding claims, wherein the ratio of the amount of driven movement of the loading member to the amount of movement of the at least one contact member being a non-linear function of the position of the loading member.
An inhaler for delivery by inhalation of a medicament from a canister which is compressible to deliver a dose of medicament, the inhaler comprising:
An inhaler according to any one of the preceding claims, further comprising a triggering mechanism arranged to hold the resilient loading element against actuation of the canister and triggerable to release the resilient loading element.
An inhaler constructed and arranged to operate substantially as hereinbefore described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.