US 10,889,959 B2
Adapter board bolted joint surface
David Bruno Parzynski, Jr., Peoria, IL (US); Thomas Marshall Congdon, Dunlap, IL (US); and Susan Marie Graham, Morton, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Apr. 13, 2018, as Appl. No. 15/952,421.
Prior Publication US 2019/0316319 A1, Oct. 17, 2019
Int. Cl. E02F 3/815 (2006.01)
CPC E02F 3/8152 (2013.01) 8 Claims
OG exemplary drawing
 
1. A blade assembly including a moldboard defining an upper moldboard free end and a lower moldboard free end, the lower moldboard free end defining a lower curved mounting surface for use with a grading machine, the blade assembly comprising:
an adapter board defining an upper adapter board attachment portion, terminating in an upper adapter board free end, and a lower tool bit attachment portion, terminating in a lower adapter board free end,
wherein the upper adapter board attachment portion comprises a rear surface that defines a first peak surface and a second peak surface, the first peak surface and the second peak surface forming a first valley between the first peak and the second peak, and the upper adapter board contacts the lower curved mounting surface with the first peak surface being disposed adjacent the upper adapter board free end and the second peak surface being disposed adjacent the lower moldboard free end with the first valley being empty.