Drilling unit with hollow annular drill bit and central drill

Details Drilling unit with hollow annular drill bit and central drill Drilling unit with hollow annular drill bit and central drill

1995-09-05

1998-07-07

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Bit with leading portion forming smaller diameter initial bore

E21B 1000

Patent

active

057754454

ABSTRACT:
A drilling unit is formed of a hollow annular drill bit (1) and a centering drill (2) where the centering drill is a single piece including a chucking shank (2a) and a drill head (2b). A detachable connection is provided between the annular drill bit (1) and the centering drill (2), preferably in the form of a thread (3) whereby the drilling unit can be provided with different diameter annular drill bits (1) and can be adapted to different applications as well as to different power tools presently in use.

REFERENCES:
patent: 616928 (1899-01-01), Isgrig et al.
patent: 5466099 (1995-11-01), Sullivan et al.

Affiliated with

Also associated with

Rating

Drilling unit with hollow annular drill bit and central 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 Drilling unit with hollow annular drill bit and central drill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drilling unit with hollow annular drill bit and central drill will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1196210