Conveyors: power-driven – Conveyor section – Reciprocating conveying surface
Patent
1997-05-21
1999-11-09
Bidwell, James R.
Conveyors: power-driven
Conveyor section
Reciprocating conveying surface
1987521, B65G 2720
Patent
active
059796405
ABSTRACT:
A conveyor drive having a first crank (44) rotatably mounted to a base (24) for producing a first sinusoidal harmonic and a second crank (62) rotatably mounted to a conveying trough (22) for producing a second sinusoidal harmonic. A link (66) is connected between the first and second cranks (44, 62) to impart a first sinusoidal harmonic of the first crank (44) to the second crank (62). The second crank imparts a working displacement to the conveying trough (24) as a function of a phase relationship between the first and second sinusoidal harmonics of the respective eccentrics (44, 62). A synchronizer (FIG. 5) is operatively connected to the cranks (44, 62) for selectively adjusting the angular phase relationship between the first and second sinusoidal harmonics of the respective cranks (44, 62) to correspondingly vary the working displacement imparted to the trough (22), thereby controlling the speed of material being conveyed along the trough (22).
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