Patent ID: 11882778
Assignee: DEERE & COMPANY
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 16:
17. A disk assembly for use with a tillage machine having a main frame, the disk assembly comprising:
a support element configured to be coupled to the main frame;
an arm assembly extending from the support element;
a disk coupled to and supported by the arm assembly, the disk including
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 abutment face being complementary to a mating surface of the arm assembly, and
an aperture extending through the hub portion and centered about the axis of rotation,

wherein the first radius is constant from the hub portion to the circumferential edge.