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

Claim 7:
8. 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,
wherein the first radius is constant from the hub portion to the circumferential edge.