Dispensing device, storage device and method for dispensing powder

摘要

A dispensing device, and a method for dispensing powder in which powder is dispensed through a duct with a flat cross section to de-agglomerate the powder and to generate a spray with fine particle size. A storage chamber for the powder may be closed by a bursting element which is burst by pressurized gas for discharging the powder, the gas pressure reaching or exceeding a peak value before the bursting element bursts so that the powder is dispensed at a lower gas pressure. The powder may be forced through the duct by a gas pressure of less than 300 kPa to de-agglomerate the powder and/or to generate the spray. The storage device can have multiple storage chambers and associated ducts or nozzles, so that each dose of powder can be dispensed through a separate duct or nozzle, the storage chamber and duct or nozzle being formed of a one-piece construction.

主权项

1. A dispensing device for dispensing a powder as a spray including fine powder particles, the dispensing device comprising a plurality of storage devices, each of which has a cylindrical shaped storage chamber containing a single dose of the powder to be discharged by gas pressure and at least one of a duct and a nozzle associated with a first end of each storage chamber so that each dose of powder is dispensed through the at least one of a duct and nozzle by the gas pressure supplied by means of a gas inlet located at an opposite second end of each storage chamber, wherein each storage device together with its storage chamber and associated at least one of a duct and nozzle is formed of a one-piece construction, and wherein the gas inlet is tangentially connected to the storage chamber.