Patent ID: 7743761

Claim:
A rock cutting and trimming device comprising: (a) a C-clamp having a top port and a bottom port; (b) a hydraulic cylinder; (c) a sleeve; (d) a shaft; (e) a top tooth; (f) a bottom tooth; and (g) an alignment pin and a locking nut; wherein the hydraulic cylinder is coupled to the shaft; wherein the shaft fits inside of the sleeve; wherein the sleeve is coupled to the top port of the C-clamp; wherein the top tooth is coupled to the shaft; wherein the bottom tooth is coupled to the bottom port of the C-clamp; wherein each of the top tooth and bottom tooth comprises a cutting edge; wherein the cutting edge of the top tooth faces the cutting edge of the bottom tooth; wherein the hydraulic cylinder causes the top tooth to move vertically upward and downward; wherein the cutting edges of the top and bottom teeth are vertically aligned so that when the top tooth is fully extended downward, the cutting edge of the top tooth is parallel to the cutting edge of the bottom tooth; wherein the shaft comprises a vertical channel; wherein the sleeve comprises a first aperture and a second aperture that are horizontally aligned with one another; wherein the alignment pin is inserted through the first aperture in the sleeve, through the vertical channel in the shaft, and through the second aperture in the sleeve; wherein after the alignment pin is inserted, the locking nut is positioned on the sleeve directly over the first and second apertures, thereby preventing the alignment pin from becoming dislodged; and wherein the alignment pin prevents the shaft from rotating horizontally but allows it to move vertically.