Drilling tool, especially for hammer drills

Details Drilling tool, especially for hammer drills Drilling tool, especially for hammer drills

1975-04-23

1977-01-11

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Core forming type

175320, 175398, 403343, 403372, E21B 912

Patent

active

040022145

ABSTRACT:
A boring tool, especially for drill hammers with a hollow drill core bit, which the inner thread of the hollow drill core bit connected directly to the borer shank and in which a corresponding outer thread provided on a holding mandrel form a part of the borer shank have a wire coil-thread insert inserted therebetween. The hollow drill core bit and the borer shank are provided with centering surfaces located between the windings of the wire coil thread insert and arranged in centering engagement with each other.

REFERENCES:
patent: 2152681 (1939-04-01), Caminez
patent: 2418418 (1947-04-01), Martin et al.
patent: 2816737 (1957-12-01), Kinard et al.
patent: 3062568 (1962-11-01), Andresen et al.
patent: 3690390 (1972-09-01), Chromy

Affiliated with

Also associated with

Rating

Drilling tool, especially for hammer drills 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 tool, especially for hammer drills, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drilling tool, especially for hammer drills will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1739253