US 12,446,481 B2
Agricultural drill/planter/coulter/disc blade with step plane notch edge
Douglas G. Bruce, West Des Moines, IA (US)
Assigned to Osmundson Mfg. Co., Perry, IA (US)
Filed by Osmundson Mfg. Co., Perry, IA (US)
Filed on Mar. 12, 2024, as Appl. No. 18/602,762.
Application 18/602,762 is a continuation of application No. 16/419,700, filed on May 22, 2019, granted, now 11,944,025.
Prior Publication US 2024/0298559 A1, Sep. 12, 2024
Int. Cl. A01B 15/16 (2006.01); A01B 7/00 (2006.01); A01B 21/08 (2006.01); A01B 23/06 (2006.01)
CPC A01B 15/16 (2013.01) [A01B 7/00 (2013.01); A01B 21/086 (2013.01); A01B 23/06 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A ground engaging agricultural tillage blade comprising:
a disc having a central opening adapted to be attached to an implement for rotation about an axis of rotation, the disc having an outer periphery extending along a circumference of the disc; and
a plurality of step plane notches, each with an edge of uniform depth, in the outer periphery of the disc alternating with a plurality of edge segments extending along the disc circumference, each step plane notch comprising a width and a major section comprising a uniform depth,
wherein:
i. each edge segment comprises a width that is greater than the depth of each step plane notch,
ii. the width of each step plane notch is the same, and
iii. the uniform depth of the major section is the same for each step plane notch.