Patent ID: 9212553
Filing Date: 2015-12-15
Classification: B28D,E21C

Abstract:
1. An improved dirt and rock cutting tool device, comprising: a bit block having an internal bore disposed therein; a tool bit having a planar shoulder and a shank extending from the planar shoulder of the tool bit wherein said shank has a terminal end with a threaded bore member disposed therein and further wherein said shank has a diameter dimensioned to be received by the internal bore of the bit block, the bit block being configured such that a bolt can be configured to be threadably received by the threaded bore member and such that the bolt can be rotationally tightened against the bit block to secure the tool bit to the bit block; and at least one pin member carried by said planar shoulder and configured to engage and bite into a face of the bit block when the tool bit is secured to the bit block by rotationally tightening the bolt against the bit block to restrict rotational movement of said tool bit in relation to the bit block.