Hydraulic system for harvesting machines

F - Mech Eng,Light,Heat,Weapons – 15 – B

Patent

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138/74.12

F15B 11/16 (2006.01) A01D 41/00 (2006.01)

Patent

CA 1141627

IMPROVED HYDRAULIC SYSTEM FOR HARVESTING MACHINES ABSTRACT OF THE DISCLOSURE An open center hydraulic system in which a pair of flow divider valves is connected in series with the system's hydraulic pump to create a parasitic pressure upstream of these flow valves and the feeder and separator cluthces are controlled remotely by simple solenoid actuated two-position valves. The cylinders actuating the clutches are of sufficient size upon application of the minimum parasitic pressure to hold the clutches in a given position so that no center neutral position is necessary on the two-position valves.

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