Alan R. Egge
Engineers at 21 St, Yankton, SD

6561359, May 13, 2003

Mar 1, 2001

09/796939

Alan R. Egge - Yankton SD
Stephen Anderson - Yankton SD

Astec Industries, Inc. - Chatanooga TN

B07B 902

209 44, 209 13, 209 121, 209 17, 209 18, 209454, 209455

An apparatus and method for removing lightweight particulates during processing of a primary material. The apparatus includes a classification tank having an inlet, an outlet and a plurality of settling stations located therebetween. A slurry of fluid and particles is introduced into the inlet and directed towards the outlet. As the slurry traverses along the classification tank, particles come out of suspension at the settling stations according to weight and to a lesser degree, density. The composition as well as the quantity of particles at the settling stations is periodically inspected. If particles deposited at a particular settling station are more or less the same size, and if they have accumulated in sufficient quantity, they are discharged to a flume which directs them to preselected collection areas. If the particles deposited at a particular settling station vary substantially in size, which would indicate the presence of lightweight material, and if they have accumulated in sufficient quantity, they are discharged to a different flume or flumes which directs them to a screen or screens prior to directing them to preselected collection areas.

4923597, May 8, 1990

Jan 13, 1989

7/297417

Don W. Anderson - Yankton SD
Robert Eddy - Yankton SD
Alan Egge - Yankton SD
Richard Lewison - Pocahontas IA

B07B 128

209420

A portable screen with a raising and levelling system for raising a frame of the system containing a vibrating screen away from ground on which the system is positioned and for levelling the frame and vibrating screen for improved operation. A wheel assembly rigidly fixed relative to the frame extends from the frame at a first end wall where a first raising and levelling assembly is provided. At an opposite end wall of the frame, a second raising and levelling system is provided. First and second shedding roofs are respectively positioned over the wheel assembly and first and second hydraulic raising and levelling assemblies. With the portable screen having a raising and levelling system as disclosed, the system may be operated on sloping ground and/or ground having undulations and other protrubances.

7461746, Dec 9, 2008

Jun 19, 2007

11/820421

Alan R. Egge - Yankton SD, US
Steve J. Anderson - Yankton SD, US
Jeffrey A. Wendte - Yankton SD, US

Astec Industries, Inc. - Chattanooga TN

B07B 1/00

209413, 209268, 209420

A portable screening and washing assembly includes a frame, and in addition, a scrubbing mill, a vibratory screen assembly and a fine material washer, all of which are mounted on the frame. Both the scrubbing mill and the fine material washer are adapted to move between a transport configuration and an operational configuration.

6866074, Mar 15, 2005

Feb 12, 2004

10/778834

Alan R. Egge - Yankton SD, US
Jeffery A. Wendte - Yankton SD, US

B65B001/04

141 98, 141 95, 222 64, 209 13

A tank assembly for classifying and blending sand products. The tank assembly includes a receptacle adapted to retain slurry at or below an upper level. The receptacle includes a feed end having a receptacle inlet, a discharge end having a receptacle overflow outlet, and a pair of side walls extending between the feed end and the discharge end. The discharge end of the receptacle is generally opposed to the feed end. The tank assembly also includes a plurality of upper cross tubes mounted to and extending between the pair of side walls of the receptacle. Each of the plurality of upper cross tubes is disposed above the upper level of the receptacle. The tank assembly further includes a plurality of settling stations mounted in the receptacle. Each of the settling stations includes an adjustable height sensing paddle adapted to control the amount of slurry that accumulates at the station, a discharge valve, and a slurry discharge pipe. Still further, the tank assembly includes a slurry collecting flume extending to and in communication with the slurry discharge pipes.