Annular air-hammer apparatus for drilling holes

Details Annular air-hammer apparatus for drilling holes Annular air-hammer apparatus for drilling holes

1986-08-29

1987-11-10

Schran, Donald R.

Boring or penetrating the earth

With below-ground tool drive prime mover

173 73, 175215, 175296, E21C 324, E21B 414

Patent

active

047051191

ABSTRACT:
An annular air-hammer apparatus for drilling holes incorporates a hollow cylindrical case with a stepped bore which has inlet and outlet ports. A rock-cutting tool with an axial opening is fitted to the case at the forward end thereof. A chips-receiving sleeve and a stepped ring-shaped hammer are located inside the case, whereby the hammer forms a working-stroke chamber with the case and an idle-stroke chamber with the case, the rock-cutting tool and the chips-receiving sleeve. The chips-receiving sleeve has a cylindrical protuberance at its upper end which interacts with the hammer when this is in its topmost position. A channel is provided in the idle-stroke chamber at that side thereof which faces the upper end face of the hammer.

REFERENCES:
patent: 3299971 (1967-01-01), Lewis
patent: 3524511 (1970-08-01), Klemm
patent: 3795283 (1974-03-01), Oughton
patent: 4321974 (1982-03-01), Klemm

Affiliated with

Also associated with

Rating

Annular air-hammer apparatus for drilling holes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Annular air-hammer apparatus for drilling holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Annular air-hammer apparatus for drilling holes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1062000