FLOOD PROTECTION FOR UNDERGROUND AIR VENTS

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the ventilation duct includes sup...

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Bibliographic Details
Main Authors Eastman Nick Adam, Waters, JR. Louis A
Format Patent
LanguageEnglish
Published 02.11.2017
Subjects
AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING
BLASTING
DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL
EARTH DRILLING
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES
FOUNDATIONS
HEATING
HYDRAULIC ENGINEERING
LADDERS
LIGHTING
MECHANICAL ENGINEERING
MINING
RANGES
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
VENTILATING
WEAPONS
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Summary:Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls proximate the top opening holding one or more hinge connected panels that manually release to rotationally close the passage and are manually rotationally liftable to a home position allowing ventilation. A releasable latching system between panel and a suspension member holder catches rising panels to hold them in home position ready for release.
Bibliography:Application Number: US201715650487