Height sensing system for a harvester head

Details Height sensing system for a harvester head Height sensing system for a harvester head

1998-11-16

2000-03-28

Will, Thomas B.

Harvesters

Motorized harvester

With condition-responsive operation

56208, 56DIG10, A01D 3428

Patent

active

060415835

ABSTRACT:
A harvester head, such as an ultra-narrow row cotton (UNRC) fingerhead, includes one or more rockshaft cylinders connected to a hydraulic circuit including first and second closed center valves connected to a shuttle valve to allow the rockshaft cylinders to be controlled by two separate height sensing shoes, one at each end of the head, which are not mechanically linked to each other. The closed center valves provide a positive displacement of oil to and from the rockshaft cylinders to control the height of the head. The shuttle valve provides head lift when either of the height sensing shoes indicates a raise condition and head lower only when both shoes indicate a lower condition. Electrohydraulic valves connect the source of hydraulic pressure on the harvester to the cylinders through the shuttle valve for operator selection of raise and automatic height control functions.

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