Robert W Urban

US Patent:

47544376, Jun 28, 1988

Filed:

Aug 28, 1986

Appl. No.:

6/901730

Inventors:

Lewis W. G. Doom - East Islip NY
Lewis W. G. Doom - Oakdale NY
Robert W. Urban - East Islip NY

International Classification:

B01F 1306

US Classification:

366139

Abstract:

An improved method for mixing and/or drying particulate material is achieved with a housing having a substantially cylindrical portion and a tapered portion arranged coaxially therewith. A motor-driven rotor is arranged within the housing and is provided with a plurality of impeller blades which are affixed at one end to the shaft member. The impeller blades extend substantially radially outwardly toward the internal surface of the housing means. Each blade has a dual pitch characteristic which, in combination with a direction or rotation permits establishment of first and second flows of the fluidized material in opposite directions in the housing. The first and second flows are combined in the tapered section of the housing wherein there is provided a terminating impeller which agitates the combined flows in response to rotation of the central shaft. A material flow of the particulate material with sufficient velocity will fluidize the material being mixed or dryed. Fluidization of the particulate material achieves very rapid, uniform and efficient drying and/or mixing.

US Patent:

46503439, Mar 17, 1987

Filed:

Nov 6, 1984

Appl. No.:

6/668657

Inventors:

Lewis W. G. Doom - East Islip NY
Lewis W. G. Doom - Oakdale NY
Robert W. Urban - East Islip NY

International Classification:

B01F 722

US Classification:

366279

Abstract:

An improved method for mixing and/or drying particulate material is achieved with a housing having a substantially cylindrical portion and a tapered portion arranged coaxially therewith. A motor-driven rotor is arranged within the housing and is provided with a plurality of impeller blades which are affixed at one end to the shaft member. The impeller blades extend substantially radially outwardly toward the internal surface of the housing means. Each blade has a dual pitch characteristic which, in combination with a direction or rotation permits establishment of first and second flows of the fluidized material in opposite directions in the housing. The first and second flows are combined in the tapered section of the housing wherein there is provided a terminating impeller which agitates the combined flows in response to rotation of the central shaft. A material flow of the particulate material with sufficient velocity will fluidize the material being mixed or dryed. Fluidization of the particulate material achieves very rapid, uniform and efficient drying and/or mixing.