Planting – Drilling – Having depositor feature
Reexamination Certificate
2008-07-29
2008-07-29
Novosad, Christopher J. (Department: 3641)
Planting
Drilling
Having depositor feature
C111S077000, C221S266000, C221S278000
Reexamination Certificate
active
11293518
ABSTRACT:
A flat seed disk is provided with a series of circumferentially arranged seed retaining protrusions providing seed retention at locations offset axially from the remainder of the disk. The offset allows the seed to fall in the correct location of the seed tube to reduce unwanted seed bounce and provide better seed delivery to the ground and better seed spacing as compared to flat disks without the offset. In one embodiment, the protrusions have seed retaining faces opening generally in the direction of disk rotation. In other embodiments, the faces are angled away from the direction of rotation to reduce interference between released seed and adjacent protrusions, and trailing radial ledges can be provided to enhance seed retention.
REFERENCES:
patent: 4047638 (1977-09-01), Harrer et al.
patent: 4241849 (1980-12-01), Harrer
patent: 4613056 (1986-09-01), Olson
patent: 6499414 (2002-12-01), Dunham
Deere & Company
Novosad Christopher J.
LandOfFree
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