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2 065 058

(13)

(51)

IPC

(21) (22)

Application

94014709/03, 1994-04-20

(22)

Actual filing date

1994-04-20

(45)

Published

1996-08-10

(72)

Inventor

Kalinin S.I.Kukushkin G.U.Logvinov V.N.

(73)

Holder

Kuznetskij Nauchno-Issledovatel'Skij I Proektno-Konstruktorskij Ugol'Nyj Institut

HYDRAULIC STAND OF MINE TIMBERING Russian patent published in 1996 - IPC

Abstract RU 2065058 C1

FIELD: mining. SUBSTANCE: hydraulic stand has safety device that comprises body provided with passages to connect piston cavity of hydraulic stand to drainage and slide valve with spring. Adjustable valve is placed in cylindrical ledge of lid. Its slide valve has groove in midpart. The cavity formed by this groove and ledge walls has two radial passages. One passage is constantly connected to hydraulic cavity that equalizes the slide valve. Another passage may be connected through this hydraulic cavity to piston cavity of hydraulic stand through valve cavity. EFFECT: high reliability. 1 dwg

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RU 2 065 058 C1

Authors

Kalinin S.I.

Kukushkin G.U.

Logvinov V.N.

Dates

1996-08-10—Published

1994-04-20—Filed