Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1997-05-29
1999-03-23
Terrell, William E.
Conveyors: power-driven
Conveyor section
Endless conveyor
198806, 198808, 19881003, B65G 3916
Patent
active
058847545
ABSTRACT:
A conveyor belt support maintains a conveyor belt in a central position. Support rollers for the conveyor belt are provided. Additionally, an underside, edge portion of the conveyor belt acts on at least one conical alignment roller that extends transversely to a longitudinal direction of the conveyor belt, and acts to hold the conveyor belt in the central position. The rollers are supported by a rotary frame that is pivotable relative to a stationary base frame when the conveyor belt shifts sideways out of the central position. A hydraulic drive is provided for pivoting the rotary frame when the conveyor belt shift sideways. Two hydraulic pumps are provided, each driven by one of the alignment rollers to provide a pressurized hydraulic fluid to the hydraulic drive via a two-pressure valve. One of the pumps is driven with a rotational speed that depends on the amount of shifting of the conveyor belt. The fluid with the greater of the two pressures is provided to the hydraulic drive to cause the conveyor belt to pivot the rotary frame, thereby shifting the belt back toward the central position.
REFERENCES:
patent: 2569419 (1951-09-01), Kendall
patent: 2570364 (1951-11-01), Mercier
patent: 2609084 (1952-09-01), Hershey
patent: 2869712 (1959-01-01), Kindig
patent: 3301384 (1967-01-01), Sowards
patent: 3603451 (1971-09-01), Promin et al.
patent: 3693781 (1972-09-01), Homeier
Bebro-Electronic Bengel & Bross GmbH
Deuble Mark
Lipsitz Barry R.
Terrell William E.
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