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2 159 321

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IPC

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Application

99108631/03, 1999-04-13

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Start date

1999-04-13

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Actual filing date

1999-04-13

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Published

2000-11-20

(72)

Inventor

Gorelikov V.G.Gorshkov L.K.Jakovlev A.A.

(73)

Holder

Sankt-Peterburgskij Gosudarstvennyj Gornyj Institut Im. G.V. Plekhanova Universitet)

JACK COLUMN OF STRING SET Russian patent published in 2000 - IPC

Abstract RU 2159321 C1

FIELD: mining industry, specifically, string sets with separable core containers and rock-breaking tools. SUBSTANCE: jack column includes spacer with conical surfaces. Spread-out dies are placed over conical surfaces. Recesses are made in upper parts of conical surfaces. Magnetic locators are positioned in recesses. According to other versions magnetic locators can be fabricated in the form of rings or in the form of several point members. Spread-out dies interact with magnetic locators when they are positioned in upper part of spacer. EFFECT: enhanced reliability, efficiency and fatigue life of jack columns of separable string sets. 2 cl, 4 dwg

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RU 2 159 321 C1

Authors

Gorelikov V.G.

Gorshkov L.K.

Jakovlev A.A.

Dates

2000-11-20—Published

1999-04-13—Filed

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