Linkage System Magnifies Pressure On Press Wheels

Linkage System Magnifies Pressure On Press Wheels AIR SEEDERS Air Seeders (42B) 20-1-27 A new planter linkage system magnifies pressure on press wheels instead of on the opener point like parallel linkage systems because it's designed to keep seed openers and press wheels on a level plane in vertical travel. Upshot of the Precision Radial Linkage System (PRLS), as it's called, is that improved seed-firming pressure is provided, notes inventor Dan Hasbargen, who won first-place in "Successful Farming's" re-cent "Edisons of Agriculture" awards. The system applies 300 psi's on the till-age point or disk and 400 on press wheels, according to tests. As the assembly travels upward 5 in. in an arc (maximum of 10 in. of travel is possible) instead of straight up and down as with conventional linkages systems, downpressure increases to 550 psi's at the opener and 700 at press wheels. "This allows us to use a 6 1/2-in. wide by 12-in. dia. press wheel and still get great seed-firming pressure," Hasbargen says. It also helps keep seed at a consistent planting depth, even in rolling fields with wide planters, he adds. The assembly quickly bolts to any 3 by range of seed openers and cutting disks. Available in time for the 1996 planting season at around $480 per row. Contact: FARM SHOW Followup, Dan Hasbargen, 800 Buffalo Ave., Hwy. 75 South, Breckenridge, Minn. 56520 (218 643-8033).

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