Combination drill and tap tool

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Including integral locking means

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

10140, 411387, 408 26, 408220, B23G 506

Patent

active

042715547

ABSTRACT:
An elongated rectilinear tool for formation of a threaded hole in ductile metal by the coining or flowing of the metal. The tool typically is employed to form through threaded holes in a piece of ductile metal, and features a working end having a boring tip or drill point and a spade section having a flat shank with grooves in its lateral edges. The spade section holds the drill point and extends back a short distance from the working end. The diameter of the tool then enlarges slightly at a small inclined section which is followed by a longer coining tap section. The coining (flowing) of metal forms a thread on the previously smooth wall of the drilled hole, with peaks or crests, and roots. The lateral grooving of the spade section tracks, i.e. fits, into the fully formed threading as the present tool is screwed out. If the lateral grooves or notches for the spade section were not provided, then during removal of the tool from the threaded hole, the spade section of the drill portion would shear away the crests of the threads.

REFERENCES:
patent: 2654284 (1953-10-01), Schevenell
patent: 2684492 (1954-07-01), Miner et al.
patent: 2705419 (1955-03-01), Barth
patent: 3258797 (1966-07-01), Budd
patent: 3429171 (1969-02-01), Feher
patent: 3507183 (1970-04-01), Thurston

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Combination drill and tap tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-1256325

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.