DEVICE FOR VENTILATION OF MINE WORKING Russian patent published in 1998 - IPC

Abstract RU 2111365 C1

FIELD: mining industry. SUBSTANCE: device has tube elbow whose one end has flange for connection of fan for local ventilation. Tube elbow has additional hole with hinged cover opening outside. Hinged inside elbow is shaped plate with lever and weight. Cover and shaped plate are kinematically interconnected by rigid rod. EFFECT: improved quality of ventilation. 1 dwg

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RU 2 111 365 C1

Authors

Gertsen N.I.

Dates

1998-05-20—Published

1996-06-11—Filed