CONVEYOR APPARATUS

• US 3,805,946 A
• Filed: 05/11/1973
• Issued: 04/23/1974
• Est. Priority Date: 06/30/1971
• Status: Expired due to Term

• Current Assignee: Allis-Chalmers Canada Limited
• Original Assignee: Anthony D. Janitsch, Earl W. Yateman, Warren R. Vaughan
• Inventors: Yateman, Earl W., Janitsch, Anthony D., Vaughan, Warren R.
• Primary Examiner(s): Blunk, Evon C.
• Assistant Examiner(s): Valenza, Joseph E.
• Application Number:
  US05/359,381
• Time in Patent Office: 347 Days
• Field of Search: 198/165,162
• US Class Current: 198/605
• CPC Class Codes: B65G 2812/018 between conveyor sections
• CPC Class Codes: B65G 37/00 Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes series of co-operating belt conveyor units B65G15/22; series of co-operating chain conveyor units B65G17/26; sequence control of combined conveyors B65G43/10

Abstract

A belt elevator for elevating loose bulk material from one level to another, comprises a pair of cooperating endless belt conveyors whose forward runs are juxtaposed in face to face edge sealing engagement, the material being retained therebetween. One belt conveyor provides a troughed entry portion, and the other belt conveyor provides a troughed entry portion, and the other belt conveyor provides a troughed portion extending along a curved path to a discharge point at the higher level, the belts being maintained in tension and the first belt engaging the troughed portion of the second belt and serving as a hugger belt therefor.

Claims

1. Apparatus for conveying loose bulk material from one level to a higher level, and generally in the opposite direction, comprising first and second endless belt conveyors extending between respective pairs of supporting pulleys disposed at the respective levels and providing for each conveyor a forward run and a return run, each of said belts being essentially uniform in thickness and having sufficient transverse flexibility to be troughable, said second belt being wider than said first belt, and first and second automatic tensioning means connected respectively to the first and second belt conveyors for maintaining each belt conveyor in a state of tension, the forward work run of the first belt conveyor including an upwardly facing substantially horizontal entry portion, a downwardly facing upwardly inclined terminal portion, and a concavely curved intermediate portion of greater than 90*, the forward run of the second belt conveyor including a downwardly facing entry portion defining with a portion of said entry portion of the first belt conveyor a bight between the conveyors to receive loose bulk material therebetween and be elevated thereby, an upwardly facing and upwardly inclined terminal portion terminating at the higher level, and a convexly curved intermediate portion in edge sealing engagement with the intermediate portion of said first belt conveyor, the entry portion of the first belt conveyor being supported by roller troughing means so as to trough the entry portion of the first belt conveyor;

the intermediate and terminal portions of the second belt conveyor being supported by roller troughing means so as to trough the second belt conveyor throughout its intermediate and terminal portions, and the supporting pulleys and roller troughing means maintaining the forward runs of the belt conveyors in face-to-face edge sealing engagement over the intermediate and terminal portions thereof.

2. Apparatus according to claim 1 in which the second belt conveyor passes over an impact idler, the impact idler being positioned to define the commencement of said convexly curved intermediate portion of the second belt conveyor.

3. Apparatus according to claim 2 in which the roller troughing means supporting the intermediate portion have a troughing angle of from 15to 25*.