US 12,245,533 B2
Disk blade with sharpened edge and relief portion and method of manufacturing the same
Jarrod R. Ruckle, Bondurant, IA (US); Shawn J. Becker, Centralia, KS (US); and David L. Steinlage, Centralia, KS (US)
Assigned to DEERE & COMPANY, Moline, IL (US)
Filed by DEERE & COMPANY, Moline, IL (US)
Filed on Nov. 9, 2020, as Appl. No. 17/092,605.
Application 17/092,605 is a continuation of application No. 15/945,837, filed on Apr. 5, 2018, granted, now 10,827,662.
Prior Publication US 2021/0051832 A1, Feb. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A01B 15/18 (2006.01); A01B 15/16 (2006.01); A01B 23/06 (2006.01); B21D 22/02 (2006.01); B23D 65/02 (2006.01); B24B 3/46 (2006.01)
CPC A01B 15/18 (2013.01) [A01B 15/16 (2013.01); A01B 23/06 (2013.01); B21D 22/02 (2013.01); B23D 65/02 (2013.01); B24B 3/466 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An agricultural tillage disk blade for use in a tillage operation, comprising:
a central opening located at a center of the disk blade, where a rotation axis of the disk blade passes through the center of the disk blade;
a sharpened cutting edge located at an outer peripheral edge of the disk blade, where the sharpened cutting edge comprises a plurality of cutting teeth and a plurality of notches;
a plurality of waves formed in a predefined pattern circumferentially around the disk blade between the central opening and the sharpened cutting edge, the plurality of waves including a plurality of peaks; and
a plurality of relief portions machined into the plurality of peaks of the plurality of waves;
wherein, on a first side of the disk blade, a first relief portion of the plurality of relief portions machined into a first peak of the plurality of peaks comprises a face;
wherein a first material thickness of the first peak at the first relief portion is defined between the face and a second side of the disk blade;
wherein each individual relief portion of the plurality of relief portions is located radially inward of an associated notch of the plurality of notches of the sharpened cutting edge such that each individual relief portion is closer to the associated notch than to any of the plurality of cutting teeth of the sharpened cutting edge;
wherein the disk blade comprises a second material thickness that is: (i) located in the first peak, (ii) offset from the first relief portion, and (iii) defined between the first side and the second side of the disk blade; and
wherein the first material thickness is less than the second material thickness.