초록 ▼

A brattice for temporary or emergency use in underground mining provides a quickly and easily installable partition to close off drifts or tunnels as desired to control ventilation through the mine in an emergency, or for routine temporary use in the mine. The brattice comprises a brattice curtain f

A brattice for temporary or emergency use in underground mining provides a quickly and easily installable partition to close off drifts or tunnels as desired to control ventilation through the mine in an emergency, or for routine temporary use in the mine. The brattice comprises a brattice curtain formed of a thin, lightweight, fire resistant material, such as a synthetic fabric, with a peripheral spring frame installed therearound. The spring frame provides an expanding force urging the brattice curtain to a fully extended configuration, but the frame may be twisted and folded one or more times to twist and fold the attached brattice curtain for compact storage within a storage container or other convenient storage. Generally central and/or peripheral selectively openable closures may be provided in the curtains, for the passage of ventilation ducts, personnel, and other articles as required. Mating attachment of plural brattices may be provided, to span larger openings than the span of a single brattice. The curtain may also include a light, flexible extension beyond the spring frame, which may be tucked into irregular gaps for better sealing. The present brattice may be twisted and folded for compact storage, alone or with one or more additional brattices. A storage container or bag may be provided, if desired. The brattice is very light weight, and plural brattices may be stored at convenient locations throughout the mine or quickly carried into the mine, where they may be erected quickly for temporary or emergency ventilation control as required.

대표청구항 ▼

A brattice for temporary and emergency use in underground mining, comprising: a brattice curtain formed of a thin, flexible, lightweight, and fire resistant sheet of material, with said curtain having a periphery therearound with a peripheral spring member installed within said periphery of said bra

A brattice for temporary and emergency use in underground mining, comprising: a brattice curtain formed of a thin, flexible, lightweight, and fire resistant sheet of material, with said curtain having a periphery therearound with a peripheral spring member installed within said periphery of said brattice curtain, and; said peripheral spring member providing an expanding force urging said brattice curtain to a fully extended configuration for temporary and emergency mine ventilation control, and further being twistably foldable to a folded position providing for the compact storage of said brattice.