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US 7,252,247 B2Granted
Self-cleaning spray nozzle
AssigneeLifeCycle Pharma A/S
InventorsPer Holm, Elo Nielsen
Life of this patent
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Abstract
A self-cleaning spray nozzle, and in particular a self-cleaning spray nozzle for use in an apparatus for the preparation of a particulate material by a controlled agglomeration method, for example a method for controlled growth of particle size. The apparatus is especially suitable for use in the preparation of pharmaceutical compositions containing a therapeutically and/or prophylactically active substance which has a relatively low aqueous solubility and/or which is subject to chemical decomposition.
Claims29
A spray nozzle comprising:
- a central tube with a central passage for supply of a liquid, the passage terminating in an orifice for discharge of the liquid,
- a second tube surrounding the central tube whereby a first passage is defined between the central tube and the second tube for supply of primary air,
- a nozzle cone positioned at the end of the second tube and defining the outer periphery of a first discharge gap of the first passage, causing air supplied through the first passage to be mixed with the liquid to provide a liquid/air spray,
- a third tube surrounding the second tube whereby a second passage is defined between the second and the third tube for supply of secondary air, and
- a jacket positioned at the end of the third tube and defining the outer periphery of a second discharge gap of the second passage,
- characterized in that the nozzle cone is adjustably positioned at the end of the second tube for adjustment of the size of the first discharge gap.
3 more elements
Dependencies are inferred from the claim text.