Mixing device

Abstract

The mixing device for mixing a powder with a pressurized gas, comprising a mixing chamber ( 20 ) with an inlet area ( 22 ), which has at least one inlet opening ( 24 ), by way of which powder and/or pressurized gas and/or a mixture thereof may be introduced into the mixing chamber ( 20 ), and at least one outlet area ( 26 ), which is designed for withdrawing from the mixing chamber ( 20 ) a main flow (HR) of a gas or powder or a powder and gas mixture directed along the mixing chamber ( 20 ) which essentially extends from the inlet area ( 22 ) to the outlet area ( 26 ), characterized in that a regulating device ( 10 ) is arranged along and/or in continuation of the main flow (HR), regulating the main flow (HR) of the gas or powder or powder and gas mixture.

1 . A mixing device for mixing a powder with a pressurized gas,
 comprising a mixing chamber ( 20 ) with an inlet area ( 22 ), which has at least one inlet opening ( 24 , by way of which powder and/or pressurized gas and/or a mixture thereof may be introduced into the mixing chamber ( 20 ),   and at least one outlet area ( 26 ), designed for withdrawing from the mixing chamber ( 20 ) a main flow (HR) of a gas or powder or a powder and gas mixture aligned along said mixing chamber ( 20 ) which essentially extends from the inlet area ( 22 ) to the outlet area ( 26 ),   characterized in that   along and/or in continuation of the main flow (HR) a regulating device ( 10 ) is arranged which regulates the main flow (HR) of the gas or powder or powder and gas mixture.   
     
     
         2 . The mixing device according to  claim 1 ,
 characterized in that,   the outlet area ( 26 ) along the main flow (HR) in the mixing chamber ( 20 ) is essentially opposite to the at least one inlet area ( 22 ), and   the regulating device ( 10 ) has at least one regulating orifice ( 28 ), which extends essentially transversely to the direction of the main flow (HR).   
     
     
         3 . The mixing device according to  claim 1 ,
 characterized in that,   the regulating device ( 10 ) has several regulating orifices ( 28 ), which are designed to divide the main flow (HR) in several partial flows (TR) and wherein the regulating orifices ( 28 ) may be arranged in equal and/or different angles to each other, in relation to the direction of the main flow (HR) in the mixing chamber ( 20 .   
     
     
         4 . The mixing device according to  claim 1 ,
 characterized in that,   at least two regulating orifices ( 28 ) are arranged essentially in a plane transversely to the direction of the main flow (HR) in the mixing chamber ( 20 ) and   the cross section of at least two regulating orifices ( 28 ) is different.   
     
     
         5 . The mixing device according to  claim 1 ,
 characterized in that,   the ratio of the area of the at least one inlet opening ( 24 ) to the area of the at least one regulating orifice ( 28 ) is ≧1.   
     
     
         6 . The mixing device according to  claim 1 ,
 characterized in that,   the regulating device ( 10 ) is a part of the mixing chamber ( 20 ), and   the mixing chamber ( 20 ) has an elongated extension, which is formed cylindrically and/or is essentially formed conically tapered in the direction of the inlet area ( 22 ).   
     
     
         7 . The mixing device according to  claim 1 ,
 characterized in that,   the mixing chamber ( 20 ) is adaptable in its length, diameter, and/or in its modification of diameter in the direction of the main flow (HR) to each of the powders which is being used, and/or is adaptable to a powder receptacle ( 42 ) and/or a powder container ( 40 ).   
     
     
         8 . A powder container ( 40 ) for a powder jet device,
 comprising a powder receptacle ( 42 ) for the reception of a powder,   at least one gas entry ( 44 ), through which a pressurized gas may be introduced into the powder container ( 40 ) and a turbulence chamber ( 46 ), in which the gas powder is swirled and may be withdrawn through at least one outlet opening ( 48 ) as a powder and gas mixture,   characterized in that,   the powder container ( 40 ) has at least one mixing device according to  claim 1 .   
     
     
         9 . The powder container ( 40 ) according to  claim 8 ,
 characterized in that,   the gas entry ( 44 ) terminates in a nozzle ( 45 ), which may be arranged in relation to the inlet opening ( 24 ) of the mixing chamber ( 20 ), such that inhibition of the inlet opening ( 24 ) by the powder is avoidable.   
     
     
         10 . The powder container ( 40 ) according to  claim 8 ,
 characterized in that,   a regulating device ( 10 ) is arranged within the turbulence chamber ( 46 ) and in that the mixing chamber ( 20 ) for the arrangement within the powder container ( 40 ) is connectable thereto in an indirect manner by way of at least one supporting bar ( 41 ) and/or is connectable thereto in a direct manner.   
     
     
         11 . The powder container ( 40 ) according to  claim 8 ,
 characterized in that,   several regulating orifices ( 28 ) are arranged essentially in a plane transversely to the direction of the main flow (HR) in the mixing chamber ( 20 ) in different angles to the at least one outlet opening ( 48 ).   
     
     
         12 . The powder container ( 40 ) according to  claim 8 ,
 characterized in that,   the at least one regulating orifice ( 28 ) of the regulating device ( 10 ) in a plane transversely to the direction of the main flow (HR) in the mixing chamber ( 20 ) is offsetly arranged by an angle (γ) to the at least one supporting bar ( 41 ).   
     
     
         13 . The powder container ( 40 ) according to  claim 8 ,
 characterized in that,   at least one aperture ( 49 ) is arranged in front of the at least one outlet opening ( 48 ), enabling modification of the inlet geometry of the at least one outlet opening ( 48 ), and one or more apertures ( 49 ) may be present on the powder container ( 40 ) and/or on an insert ( 60 ) for a powder container ( 40 ) and/or on a lid ( 80 ) for a powder container.   
     
     
         14 . A lid ( 80 ) for a powder container ( 40 ) and/or a powder receptacle ( 42 ), which may be arranged on a powder container ( 40 ) and/or a powder receptacle ( 42 ) in a form- and/or force-locking manner,
 characterized in that,   it has at least one mixing device according to  claim 7 .   
     
     
         15 . An insert ( 60 ) for a powder container ( 40 ) and/or for a powder receptacle ( 42 ), which may be arranged on a powder container ( 40 ) and/or a powder receptacle ( 42 ) in a form- and/or force-locking manner,
 characterized in that,   it has at least one mixing device according to  claim 7 .   
     
     
         16 . A method for mixing powder and gas, with a mixing device according to  claim 7 ,
 comprising the steps:
 providing a powder and a gas; 
 introducing powder and/or gas and/or a mixture thereof into of a mixing chamber ( 20 ), essentially forming a main flow (HR) of the gas or powder or mixture thereof along the mixing chamber ( 20 ) of an inlet area ( 22 ) to an outlet area ( 26 ) of the mixing chamber ( 20 ); 
 conveying the main flow (HR) form and/or force-lockingly the outlet area ( 26 ) of the mixing chamber ( 20 ); 
 regulating the main flow (HR) of the gas and/or powder and gas mixture by way of a regulating device ( 10 ). 
   
     
     
         17 . Use of a mixing device according to  claim 7  in a dental device.