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2 082 867

(13)

C1

(51)

IPC

(21) (22)

Application

92012862/03, 1992-12-18

(22)

Actual filing date

1992-12-18

(45)

Published

1997-06-27

(72)

Inventor

Pinchuk Nikolaj Petrovich[Ru]Mel'Nichuk Igor' Pavlovich[Ru]Panin Nikolaj Mitrofanovich[Ru]Peretjaka Pavel Vladimirovich[Ua]Dumkin Lev Nikolaevich[Ru]

(73)

Holder

Pinchuk Nikolaj Petrovich[Ru]Mel'Nichuk Igor' Pavlovich[Ru]Panin Nikolaj Mitrofanovich[Ru]Peretjaka Pavel Vladimirovich[Ua]Dumkin Lev Nikolaevich[Ru]

CORE BIT Russian patent published in 1997 - IPC

Abstract RU 2082867 C1

FIELD: tools for coring by percussion-rotary method. SUBSTANCE: core bit has body with water courses and carbide inserts. Each inserts is trapezoidal in horizontal and front planes. Large bases of trapezia of each insert are located opposite relative to body inner and outer surfaces. EFFECT: higher efficiency. 3 cl, 3 dwg

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RU 2 082 867 C1

Authors

Pinchuk Nikolaj Petrovich[Ru]

Mel'Nichuk Igor' Pavlovich[Ru]

Panin Nikolaj Mitrofanovich[Ru]

Peretjaka Pavel Vladimirovich[Ua]

Dumkin Lev Nikolaevich[Ru]

Dates

1997-06-27—Published

1992-12-18—Filed

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