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| | U.S. Pregrant 20030172638 - Feeder controls for a forage harvester (Site not responding. Last check: 2007-10-16) |
 | | An agricultural harvesting machine, such as a forage harvester comprises a set of feedrolls (20, 21, 26, 27) for feeding harvested crop material to a rotating cutterhead (36). |
 | | The feedrolls are driven by a hydraulic drive means comprising a hydrostatic pump (123) coupled to the engine (70) of the harvesting machine, a hydrostatic motor (80) coupled to said feeder means (20, 21, 26, 27) and hydraulic circuitry (142, 143, 152) interconnecting the pump and the motor. |
 | | The circuitry comprises a feeder arrest valve (165) which is operable to interrupt the oil flow from said hydrostatic motor (80), thereby arresting said feedrolls (20, 21, 26, 27). |
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