Parallel link trailing arm for seeders

Details Parallel link trailing arm for seeders Parallel link trailing arm for seeders

2007-08-28

2007-08-28

Novosad, Christopher J. (Department: 3641)

Planting

Drilling

Frame and planting-element arrangement

C111S136000, C111S151000, C111S156000, C111S187000, C172S264000, C172S678000, C172S748000

Reexamination Certificate

active

11407254

ABSTRACT:
A furrow opener apparatus includes a parallel link trailing arm having a rear link that is maintained substantially horizontal as the arm moves up and down. Front and rear furrow openers are attached to the rear link. A packer wheel arm is attached to the rear link and extends rearward and downward from the rear link, and a packer wheel is mounted to the packer wheel arm and aligned with one of the furrow openers. A bias device exerts a downward bias force on the trailing arm, furrow openers, and packer wheel. The furrow openers, the packer wheel, and the rear link are maintained in rigid orientation with respect to each other when in a working mode, and a vertical operating position of at least one of the furrow openers with respect to the packer wheel is adjustable to vary a depth of the furrow.

REFERENCES:
patent: 4760806 (1988-08-01), Bigbee
patent: 5161472 (1992-11-01), Handy
patent: 5333559 (1994-08-01), Hodapp et al.
patent: 5351635 (1994-10-01), Hulicsko
patent: 5396851 (1995-03-01), Beaujot
patent: 5520125 (1996-05-01), Thompson
patent: 5562054 (1996-10-01), Ryan
patent: 5609114 (1997-03-01), Barton
patent: 6325156 (2001-12-01), Barry
patent: 6408772 (2002-06-01), Lempriere
patent: 2006/0162632 (2006-07-01), Bourgault et al.

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