Name: Flat bit sphere Named the V-back Paddlesphere bit
United States Patent
Inventer: Brett Whitlock Burdick
Flat drill bit with a sphere for better Balance and anti grab and jerk.
V-Back Paddlesphere
Inventor: Burdick; Brett W. (16 country Village Lane, Clinton Conn. 06413)
Appl. No. 11/090,265
Filed:
Field of search-U.S. Pat. No. 4,189,266 5,452,970 5,626,446 4,527,643
1. I Brett Whitlock Burdick have invented a new flat bit that is v-back to avoid Contact with the hole surface. It could have a sphere around it or not.
DRAWING 1. Of 1.