GEAR TO FORM BOREHOLES IN GROUND Russian patent published in 1995 - IPC

Abstract RU 2026935 C1

FIELD: mining industry. SUBSTANCE: gear to form boreholes in ground includes hollow cylindrical body, striking mechanism and fixture reducing backward movement of body made in the form of through longitudinal grooves. Grooves are located in side outer surface of body. Cross-section area of each groove grows towards rear butt of body. EFFECT: improved reliability and efficiency. 5 cl, 8 dwg

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RU 2 026 935 C1

Authors

Abramenkov D.Eh.

Abramenkov Eh.A.

Nadein A.A.

Dates

1995-01-20Published

1991-07-24Filed