Nest drill tube

Details Nest drill tube Nest drill tube

1993-10-19

1995-05-16

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408703, B23B 5104

Patent

active

054155045

ABSTRACT:
Rigid foam material, for example, expanded polystyrene foam, is drilled using a bit that forms an annular slit in the foam material and compresses the block temporarily around the slit. This frees the core for ready removal. The drill bit has a cutting ting at the leading end with an inside cutting edge and an annular bevel leading from the cutting edge to the outside surface of the cutting ring. The cutting ring is mounted on the leading end of a tube with an inside diameter greater than the inside diameter of the cutting ring in order to clear the core and an outside diameter less than the outside diameter of the cutting ring in order to clear the surrounding foam material.

REFERENCES:
patent: 1219677 (1917-03-01), Sparks
patent: 1279495 (1918-09-01), Dom
patent: 1557464 (1925-10-01), Mick
patent: 3512519 (1970-05-01), Hall
patent: 4621956 (1986-11-01), Hartman et al.
patent: 5098234 (1992-03-01), Judkins et al.

Affiliated with

Also associated with

Rating

Nest drill tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nest drill tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nest drill tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-634150