Patent ID: 8550073

Claim:
A nasal delivery device for delivering substance to a nasal cavity of a subject, the delivery device comprising: a nosepiece unit including a nosepiece for fitting to a nostril of a subject and a nozzle through which substance is in use delivered, preferably substantially axially to a longitudinal axis of the nosepiece, to the respective nasal cavity, wherein at least a tip element of the nosepiece has a pre-defined shape and configuration having an elongate lateral section which has a longer dimension in a first, sagittal direction than a second direction orthogonal to the sagittal direction, such that, when the nosepiece is inserted in the nasal cavity of the subject, the longer dimension of the tip element of the nosepiece acts to engage lower and upper surfaces of the nasal cavity and expand the same in the sagittal plane, preferably at least the tip element of the nosepiece comprises one of a substantially rigid structure, a semi-rigid structure or a flexible structure or the nosepiece comprises a flexible nosepiece member which defines at least the tip element of the nosepiece and a supporting member which acts structurally to support the nosepiece member, preferably the supporting member is configured such as to render the nosepiece member substantially rigid in the vertical, sagittal plane, but otherwise render flexibility to the nosepiece member, preferably such as to allow for bending in the horizontal plane and torsional flexing about the longitudinal axis of the nosepiece, and preferably the supporting member comprises an elongate plate which extends along an axial length of the nosepiece member in the sagittal plane; and a delivery unit for delivering substance through the nozzle of the nosepiece.