Patent ID: 7469648
Filing Date: 2008-12-30
Classification: A01B,A01C,Y10S

Abstract:
1. A hydraulic control system for use with an agricultural implement frame, the frame configured to move between a first height, a second height and a third height, from a supporting surface, comprising: a first set of hydraulic cylinders mounted to the implement frame, the first set of hydraulic cylinders having a first configuration wherein the frame is the first height above the supporting surface, a second configuration wherein the frame is the second height above the supporting surface; and a third configuration wherein the frame is a third height above the supporting surface; a second set of hydraulic cylinders fluidly connectable to the first set of hydraulic cylinders and mounted to the implement frame, the second set of hydraulic cylinders having a first configuration wherein the frame is the first height above the supporting surface and a second configuration wherein the frame is the second height above the supporting surface; and wherein: the first and second sets of hydraulic cylinders operate in a master/slave relationship as the first and second sets of hydraulic cylinders move from between the first and second configurations; and the first and second sets of cylinders are operable independent of each other.