US 11,882,778 B2
Tillage machine and tillage disk for the same
Luc Janelle, Ankeny, IA (US); David L. Steinlage, Centralia, KS (US); Jacob W. Cross, Norwalk, IA (US); Greg T. Buse, Johnston, IA (US); and Rohit Bartakke, Ankeny, IA (US)
Assigned to Deere & Company, Moline, IL (US)
Filed by Deere & Company, Moline, IL (US)
Filed on Nov. 11, 2020, as Appl. No. 17/095,247.
Application 17/095,247 is a continuation of application No. 15/891,134, filed on Feb. 7, 2018, granted, now 10,842,063.
Prior Publication US 2021/0059092 A1, Mar. 4, 2021
Int. Cl. A01B 15/16 (2006.01)
CPC A01B 15/16 (2013.01) 19 Claims
OG exemplary drawing
 
1. A disk for use with an arm assembly coupled to and supported by a support element of a tillage machine, the disk comprising:
a body portion rotatable about an axis of rotation, the body portion having a circumferential edge and a concavity with a first radius defined from a point on the axis of rotation;
a hub portion axially offset from a contour of the body portion, the hub portion including a wall continuous with the body portion, an abutment face continuous with the wall, and a recess defined by the wall and the abutment face, the abutment face having a concavity with a second radius defined from a point on the axis of rotation, the second radius being different than the first radius; and
an aperture extending through the abutment face and centered about the axis of rotation,
wherein the abutment face is configured to be complementary in contour and in shape to a mating surface of the arm assembly, and
wherein the first radius is constant about the axis of rotation.