E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
121/20
E02F 5/18 (2006.01) E21B 4/14 (2006.01) E21B 7/26 (2006.01) E21B 10/26 (2006.01) E21B 10/40 (2006.01)
Patent
CA 1229268
MACHINE FOR DRIVING HOLES IN THE GROUND ABSTRACT A machine for driving holes in the ground comprises a cylindrical housing, a hammer disposed inside the housing, and an air distribution mechanism. Longitudinal recesses and projections are provided on a portion of the outer surface of the housing at its head end section. The diameter of the cylindrical part of the housing is greater than the diameter of a circle described about the bottoms of the recesses and smaller than the diameter of a circle described about the tops of the projections.
454342
Chepurnoi Nikolai P.
Karavaev Andron T.
Kostylev Alexandr D.
Plavskikh Vladimir D.
Reznikov Igor I.
Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk Sssr
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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