Dispensing device, storage device and method for dispensing powder
First Claim
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.
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Accused Products
Abstract
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.
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Citations
20 Claims
- 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.
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13. A method for dispensing powder, comprising the steps of:
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providing at least one cylindrical chamber containing a fine powder, at least one of a duct and nozzle connected to a first end of said at least one cylindrical chamber, pushing a gas supply element into a gas inlet through one of a sealing element diaphragm, membrane, and wall portion, the gas inlet being tangentially connected to an opposite second end of the at least one cylindrical chamber, actuating an airpump, and discharging the powder from the chamber by means of gas pressure directly through the one of a duct and nozzle as a spray.
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14. A dispensing device for dispensing a powder as a spray including fine powder particles, the dispensing device comprising:
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a gas supply element, a plurality of storage devices, each of which has a storage chamber containing a single dose of the powder to be discharged through an outlet thereof by gas pressure supplied from said gas supply element, and at least one of a duct and a nozzle through which each dose of powder is dispensed from said outlet; wherein each storage chamber is of a cylindrical shape and has one of a sealing element and wall portion at a distance from said outlet, and wherein said gas supply element is adapted to pass through said one of a sealing element and tangentially puncture a wall portion of the storage chamber for directing gas pressure into each storage chamber. - View Dependent Claims (15, 16, 17, 18, 19)
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20. 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 storage chamber containing a single dose of the powder to be discharged by gas pressure by means of a gas inlet and at least one of a duct and a nozzle associated with 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, and 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, the gas inlet being offset with respect to the storage chamber for enabling a transverse gas supply.
Specification