METHOD FOR FORMATION OF CURVED HOLES Russian patent published in 1995 - IPC

Abstract SU 1547394 A1

FIELD: construction and mining. SUBSTANCE: area of broken surface of hole bottom by working member 15 cyclically varies by cyclic changing of transverse size of working member 15. In so doing, axial load P is continually applied to working member. Deflecting force F is applied to working member 15 in cyclic manner with minimum area of worked face that precludes side reaction of deflection. EFFECT: higher efficiency of operation due to reduced value of deflecting force. 4 dwg

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SU 1 547 394 A1

Authors

Dvornikov L.T.

Shaposhnikov I.D.

Grishin P.G.

Dates

1995-10-10—Published

1988-07-06—Filed