Patent ID: 9068323
Filing Date: 2015-06-30
Classification: E02F,F15B,Y10T

Abstract:
1. A machine comprising: a frame; ground engaging propulsion elements coupled with the frame; a hydraulically actuated implement system coupled with the frame, and including a linkage configured to couple with an implement, a hydraulic actuator coupled with the linkage and the frame, and a combined ride control and downforce control circuit configured to implement a ride control mode and a downforce control mode, the combined ride control and downforce control circuit including a switching valve, the switching valve configured to actuate the ride control and downforce control circuit between the ride control mode and downforce control mode; the ride control mode configured to maintain a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure; and the downforce control mode configured to maintain the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of the linkage and the implement such that the implement is controllably rested upon and engages a substrate positioned under the implement with a predetermined down force pressure which is proportionate to the downforce control pressure,