Patent ID: 6775966
Filing Date: 2004-08-17
Classification: A01D

Abstract:
An agricultural vehicle including an integrated combine reel hydro-mechanical drive system, the drive system being a single integrated hydraulic circuit containing a hydraulic fluid and including a hydraulic reservoir, the single hydraulic circuit comprising:a hydraulic header circuit connected to the reservoir and supplying hydraulic fluid to activate a steering mechanism; and a variable pump connected to the reservoir and disposed in the single circuit to pump hydraulic fluid to the header circuits, wherein the header circuit comprises an implement circuit supplying hydraulic fluid to an implement valve stack, a steering circuit supplying hydraulic fluid to activate the steering mechanism, a reel circuit supplying hydraulic fluid to a reel valve stack, as well as a load sensing line connected to the steering circuit, the implement valve stack, the reel valve stack, and to the variable pump so that a hydraulic load carried by the header circuit is sensed by the variable pump, and wherein the variable pump operates to vary the amount of hydraulic fluid pumped in response to the sensed hydraulic load.