Flat bit sphere named the V-back paddlesphere bit
OwnerBrett Burdickinventor
Life of this patent
Estimating the term…
Abstract
It is a flat drill bit or blade, which could have 1 or 2 blades with a sphere to eliminate most jerking and grabbing, for more efficient drilling.
Claims7
Said claim 1 that this bit with the sphere could have 1 or 2 blades.
Said claim 2 that a sphere is added for anti torque, grab and jerk.
Said claim 3 that after the sphere head it tapers to relieve so flat part of the blade avoids material therefore called the v-back paddlesphere
Said claim 4 that since it is an anti grab design drill sphere bits could be bigger.
Said claim 5 that the sphere could be curved like a cup to help in avoiding all contact with wall surfaces.
Said claim 6 that the sphere could also have blade teeth.
Said claim 7 that the sphere could be slightly narrower then the paddle part of the blade FIG. 4.