E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/04 (2006.01) B28D 1/04 (2006.01) E04G 21/12 (2006.01) E04G 23/02 (2006.01) E21B 21/12 (2006.01) E21B 21/14 (2006.01) E21B 21/16 (2006.01) E21C 1/00 (1990.01) E21C 7/00 (1990.01)
Patent
CA 2106074
A masonry coring system for drilling vertical holes in a masonry wall comprises a drill bit in the form of a thin-walled cyl- inder 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 driv- er shaft and pipe and into a dust collection mean.
Cox Dennis
Mohlenhoff William
Cox Dennis
Mohlenhoff William
Ridout & Maybee Llp
LandOfFree
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