Bale density control system for round balers

Harvesters – Raking and bundling

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100 88, A01D 3900

Patent

active

046989552

ABSTRACT:
A system for controlling the density of bales formed in a round baler includes a hydraulic cylinder unit of the single acting type connected between the frame of the round baler and a pair of arms which are pivotally mounted on the baler frame. These arms carry a set of conveying members or rollers and are movable between a bale starting position and a full bale position. The bale density control system includes a control valve that is adjustable in order to permit fluid flow from the hydraulic cylinder unit to a reservoir when the fluid pressure in the hydraulic cylinder unit reaches a preselected level. When the arms move from their bale starting position to their full bale position, the hydraulic cylinder unit is contracted and fluid flows from the hydraulic cylinder unit to the reservoir via the control valve when the preselected level of fluid pressure is reached. Conversely, when the arms move from their full bale position to their bale starting position, the hydraulic cylinder unit is extended and fluid flows from the reservoir to the hydraulic cylinder unit via a one way check valve.

REFERENCES:
patent: 3722197 (1973-03-01), Vermeer
patent: 3763636 (1973-10-01), Bliss
patent: 4257219 (1981-03-01), Burrough et al.
patent: 4611535 (1986-09-01), Anstey et al.
patent: 4627340 (1986-12-01), Glass et al.

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