Patent ID: 8544397
Filing Date: 2013-10-01
Classification: A01B,A01C,Y10S

Abstract:
1. An agricultural row unit for use with a towing frame hitched to a tractor, said row unit comprising an attachment frame adapted to be rigidly connected to said towing frame, a linkage pivotably coupled to said attachment frame, a row unit frame having a leading end pivotably coupled to said linkage to permit vertical pivoting movement of said row unit frame relative to said attachment frame, at least a furrow-forming device mounted on said row unit frame, a hydraulic cylinder coupled to said attachment frame and said linkage for urging said row unit frame downwardly toward the soil, said hydraulic cylinder including an accumulator positioned adjacent to said hydraulic cylinder and having a fluid chamber containing a diaphragm, the portion of said chamber on one side of said diaphragm being connected to said hydraulic-fluid cavity in said hydraulic cylinder, and the portion of said chamber on the other side of said diaphragm containing a pressurized gas.