Dentistry – Apparatus – Tool bit
Patent
1980-11-03
1982-08-24
Mancene, Gene
Dentistry
Apparatus
Tool bit
408226, A61C 302
Patent
active
043458998
ABSTRACT:
A dental twist drill including a cutting section consisting of blades extending at an angle to the main axis of the drill. These cutting blades are carried at the end of helically arranged bearing surfaces which extend parallel to the main axis of the drill and thereby furnish, when rotating, a cylindrical support for the cutting section against the sides of the post hole being drilled. The outer bearing surfaces are separated by flutes. These flutes convey the debris axially along the drill, away from the direction of drilling into a recess or chip trap. A further bushing or bearing surface having the same outer diameter as the first mentioned bearing surface and hence a diameter equal to the interior diameter of the post hole being drilled is connected to the recessed section, and preferably this bushing is also formed of a plurality of helically arranged bearing surfaces alternated with flutes. The outer surfaces of the bearing surface match the post hole exactly. The flutes serve to convey the debris further away from the cutting site and out through the top of the hole being drilled.
REFERENCES:
patent: 362934 (1887-05-01), Champion
patent: 1366877 (1921-01-01), Craig
patent: 1643679 (1927-09-01), Roderick
patent: 2264922 (1941-12-01), Van Hooser
patent: 2715772 (1955-08-01), Fritz
patent: 3564948 (1971-02-01), Pomernacki
patent: 3832779 (1974-09-01), Reynaud
patent: 4050345 (1977-09-01), Reibetanz et al.
"Power Drill and Sanding Accessories", p. 813 of Montgomery Ward's Catalog, Fall and Winter 1978.
Mancene Gene
Rosen Lawrence
Wilson John J.
LandOfFree
Dental twist drill does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dental twist drill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dental twist drill will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1435487