LOCKING DEVICE OF COVER OF MAN-HOLE Russian patent published in 2002 - IPC

Abstract RU 2188291 C2

FIELD: public utilities. SUBSTANCE: invention refers to locking device of cover of man-hole comprising locking screw with head for special wrench and sliding nut with levers. Locking device is inserted disc attached to cover of man-hole which has bushing and three brackets carrying length-adjusted levers which move along axles in brackets. Locking screw enters socket in cover with its upper part and its lower part enters bushing for free rotation. Sliding nut with slits into which ends of brackets are entered and secured are put on locking screw. Upper part of locking screw has groove where sealing ring is placed. EFFECT: enhanced resistance to breaking. 1 cl, 2 dwg

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RU 2 188 291 C2

Authors

Gertsenberg Ju.G.

Eremin A.B.

Erofeev V.I.

Latarija V.V.

Dates

2002-08-27—Published

2000-07-17—Filed