US 10,889,966 B2
Drafted tool bit and blade assembly
David Bruno Parzynski, Jr., Peoria, IL (US); and Thomas Marshall Congdon, Dunlap, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Apr. 13, 2018, as Appl. No. 15/952,955.
Prior Publication US 2019/0316327 A1, Oct. 17, 2019
Int. Cl. E02F 9/28 (2006.01); E02F 3/815 (2006.01)
CPC E02F 9/2858 (2013.01) [E02F 3/8152 (2013.01); E02F 9/2833 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A tool bit for use with a blade assembly of a grading machine, the tool bit comprising:
a shank portion defining a longitudinal axis; and
a working portion extending downwardly axially from the shank portion;
wherein the working portion includes a rear region, a front working region, a first side region and a second side region, and the first side region and the second side region define an angle of extension measured in a plane perpendicular to the longitudinal axis, forming a wider front working region than the rear region in a plane perpendicular to the longitudinal axis; and
the front working region includes a first angled surface and a second angled surface forming a first included angle with the first angled surface projected along the longitudinal axis onto a plane perpendicular to the longitudinal axis ranging from 150 to less than 180 degrees.