Dispensing device, storage device and method for dispensing powder
First Claim
1. Dispensing device for dispensing a powder as a spray including fine powder particles, the dispensing device comprising at least one duct, at least one powder-containing storage chamber connected to said at least one duct, and at least two powder jets connected to the at least one duct downstream thereof, wherein the powder is dispensable via the at least two powder jets into a mouthpiece from the at least one powder-containing storage chamber and at least one duct by gas pressure for de-agglomerating the powder, wherein the at least two powder jets are arranged at a powder impinging angle so as to form a powder jet impinging means for impinging powder from the at least two powder jets against each other to at least one of deagglomerate the powder, slow down the propagation velocity of the spray and mix separate powders by said at least two powder jets, wherein said powder impinging angle between the at least two powder jets is about 90°
- to 150°
in a plane containing the powder jets;
wherein said powder jets are positioned relative to a frontmost end of the device from which the spray dispensed is received by a user so as to produce impingement of powder from said jets externally, forward of the frontmost end of the device, and wherein a first cross section of a gas supply inlet to the storage chamber is smaller than a second cross section of an outlet for the powder to substantially control or restrict the gas flow during dispensing of the powder by the first cross section.
1 Assignment
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Accused Products
Abstract
A dispensing device, a storage 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.
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Citations
28 Claims
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1. Dispensing device for dispensing a powder as a spray including fine powder particles, the dispensing device comprising at least one duct, at least one powder-containing storage chamber connected to said at least one duct, and at least two powder jets connected to the at least one duct downstream thereof, wherein the powder is dispensable via the at least two powder jets into a mouthpiece from the at least one powder-containing storage chamber and at least one duct by gas pressure for de-agglomerating the powder, wherein the at least two powder jets are arranged at a powder impinging angle so as to form a powder jet impinging means for impinging powder from the at least two powder jets against each other to at least one of deagglomerate the powder, slow down the propagation velocity of the spray and mix separate powders by said at least two powder jets, wherein said powder impinging angle between the at least two powder jets is about 90°
- to 150°
in a plane containing the powder jets;
wherein said powder jets are positioned relative to a frontmost end of the device from which the spray dispensed is received by a user so as to produce impingement of powder from said jets externally, forward of the frontmost end of the device, and wherein a first cross section of a gas supply inlet to the storage chamber is smaller than a second cross section of an outlet for the powder to substantially control or restrict the gas flow during dispensing of the powder by the first cross section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- to 150°
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13. Dispensing device for dispensing a powder as a spray including fine powder particles, the dispensing device comprising at least one duct, at least one powder-containing storage chamber connected to said at least one duct, and at least two powder jets connected to the at least one duct downstream thereof, wherein the powder is dispensable via the at least two powder jets into a mouthpiece from the at least one powder-containing storage chamber and at least one duct by gas pressure for de-agglomerating the powder, wherein the at least two powder jets are arranged at a powder impinging angle so as to form a powder jet impinging means for impinging powder from the at least two powder jets against each other to at least one of deagglomerate the powder, slow down the propagation velocity of the spray and mix separate powders by said at least two powder jets, wherein said powder impinging angle between the at least two powder jets is about 90°
- to 150°
in a plane containing the powder jets;
wherein said powder jets are positioned relative to a frontmost end of the device from which the spray dispensed is received by a user so as to produce impingement of powder from said jets externally, forward of the frontmost end of the device, wherein the storage device comprises a pressure sensitive element closing the at least one storage chamber such that the pressurized gas opens the pressure sensitive element for discharging powder from the associated storage chamber to dispense the powder and wherein the pressure sensitive element is a bursting element that is burst by the pressurized gas. - View Dependent Claims (14, 15, 16, 17, 18, 19)
- to 150°
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20. Dispensing device for dispensing a powder as a spray including fine powder particles, the dispensing device comprising at least one duct, at least one powder-containing storage chamber connected to said at least one duct, and at least two powder jets connected to the at least one duct downstream thereof, wherein the powder is dispensable via the at least two powder jets into a mouthpiece from the at least one powder-containing storage chamber and at least one duct by gas pressure for de-agglomerating the powder, wherein the at least two powder jets are arranged at a powder impinging angle so as to form a powder jet impinging means for impinging powder from the at least two powder jets against each other to at least one of deagglomerate the powder, slow down the propagation velocity of the spray and mix separate powders by said at least two powder jets, wherein said powder impinging angle between the at least two powder jets is about 90°
- to 150°
in a plane containing the powder jets; and
wherein said powder jets are positioned relative to a frontmost end of the device from which the spray dispensed is received by a user so as to produce impingement of powder from said jets externally, forward of the frontmost end of the device, wherein said at least one storage chamber contains a dose of the powder, wherein said at least one duct comprises a first duct portion that tangentially intersects said at least one storage chamber and wherein a flow divider subdivides a second duct portion into a pair of duct passages, outlet ends of which form the powder jets that are angled toward each other. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
- to 150°
Specification