Pneumatic sifter
OwnerJosef Keuschnigginventor
Life of this patent
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Abstract
A pneumatic sifter includes a feeder for supplying sift material, optionally with sifting air, to a rotationally symmetrical sifting chamber which surrounds a centrally disposed air outlet chamber, and a coarse particle discharge. In order to keep the flow resistance low as air enters into the air outlet chamber, guide vanes are provided in the air outlet chamber, which are spaced from each other at uniform angular distances and extend approximately over the axial extension of the sifting chamber.
Claims21
A pneumatic sifter, comprising:
- a casing having a sifting chamber defined by an axial extension and receiving material to be separated, a coarse particle outlet and air outlet means for discharge of air with fines, said air outlet means including an air outlet chamber surrounded by said sifting chamber and a discharge pipe in prolongation of said air outlet chamber and;
- baffle means arranged about the outer perimeter of said air outlet chamber and projecting into said discharge pipe for guiding air with fines in an axial direction, said baffle means including guide vanes spaced from each other at uniform angular distances and extending approximately over the axial extension of said sifting chamber.
A baffle arrangement for use in a pneumatic sifter of a type including a casing having a sifting chamber, a coarse particle outlet and an air outlet means for discharge of air with fines, said air outlet means including an air outlet chamber surrounded by said sifting chamber and a discharge pipe in prolongation of said air outlet chamber, said baffle arrangement including guide vanes arranged about the outer perimeter of and projecting into said discharge pipe for guiding air with fines in an axial direction, said guide vanes being spaced from each other at uniform angular distances and extending approximately over an axial extension of said sifting chamber.
Dependencies are inferred from the claim text.