Title:
MASONRY CORING SYSTEM
Document Type and Number:
WIPO Patent Application WO1992016712
Kind Code:
A3
Abstract:
A masonry coring system for drilling vertical holes in a masonry wall comprises a drill bit in the form of a thin-walled cylinder having a cutting end face, a plurality of cutting elements fastened to the cutting end face, and a core breaker located within the interior of the cylinder. The coring system further comprises a driver plate fastened to the drill bit opposite the cutting end face, a driver shaft having a small axial hole therein fastened to the upper surface of the driver plate, a hydraulic motor to rotate the driver shaft, a non-rotating plastic pipe slightly larger than and surrounding the driver shaft, the plastic pipe resting on the driver plate and containing a plurality of holes located at the end near the driver plate. An air compressor forces compressed air through the axial hole in the driver shaft. An evacuation system withdraws the drilling dust through the annulus between the driver shaft and pipe and into a dust collector.
Inventors:
MOHLENHOFF WILLIAM (US)
COX DENNIS (US)
COX DENNIS (US)
Application Number:
PCT/US1992/001997
Publication Date:
October 29, 1992
Filing Date:
March 12, 1992
Export Citation:
Assignee:
MOHLENHOFF WILLIAM (US)
COX DENNIS (US)
COX DENNIS (US)
International Classes:
B28D1/04; E04G23/02; E21B10/04; E21B21/12; E21B21/16; (IPC1-7): E21B10/04; E21B21/14; E04G21/12
Foreign References:
| US5015128A | 1991-05-14 | |||
| US3102600A | 1963-09-03 | |||
| US3055443A | 1962-09-25 | |||
| US3946818A | 1976-03-30 |
Other References:
See also references of EP 0678149A4
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