Francis Edward Litty
Engineers at Adams St, Denver, CO
License number
Colorado 6133
Issued Date
Apr 24, 1965
Renew Date
Jan 10, 1992
Expiration Date
Jan 10, 1992
Type
Professional Engineer
Address
Address
1711 S Adams St, Denver, CO 80210
Professional information
Multiple Deck Trommel Screen
US Patent:
4119534, Oct 10, 1978
Filed:
Mar 18, 1977
Appl. No.:
5/778876
Inventors:
Stuart M. Porter - Denver CO
Francis Edward Litty - Denver CO
Ervin C. Weimer - Wheat Ridge CO
Eric G. Pollack - Denver CO
Francis Edward Litty - Denver CO
Ervin C. Weimer - Wheat Ridge CO
Eric G. Pollack - Denver CO
Assignee:
Stearns-Roger Corp. - Glendale CO
International Classification:
B07B 124
US Classification:
209291
Abstract:
A multiple deck trommel screen is provided having at least an inner course screen and an outer fine screen, both having a diameter greater than the rotating drum to which they are attached for separating fines from course material. A deflector plate is provided at the end of the trommel screen for impingement of air-borne particles so that they fall on the inner trommel screen. A first hopper is provided under the outer trommel screen for receiving the fines and a second hopper is provided beyond the end of both of the trommel screens for receiving the course material. The outer trommel screen is made up of generally flat screen sections which extend as chords around the periphery of a trommel screen frame.