Hydraulic height sensing system with cylinder by-pass

Details Hydraulic height sensing system with cylinder by-pass Hydraulic height sensing system with cylinder by-pass

A - Human Necessities

01

D

56/33, 138/80.1

A01D 45/00 (2006.01)

Patent

CA 1074571

Abstract of the Disclosure An agricultural harvesting machine having a plurality of independently supported row crop harvesting units is provided with a hydraulically operated vertical positioning mechanism for adjusting the height of the units in accordance with ground surface variations. Each unit is provided with a ground-engaging feeler mechanically coupled to a control valve which adjustably varies the hydraulic fluid flow to a single acting unit lift cylinder. The cylinder includes fluid bypass capabilities to permit continued hydraulic fluid flow upon full extension of the cylinder piston and thereby avoid a fluid system pressure and consequent temperature increase.

305785

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