Portable ventilation safety device

Details Portable ventilation safety device Portable ventilation safety device

1987-08-20

1988-09-13

Joyce, Harold

Flexible or portable closure, partition, or panel

Fabric fastening means

To elongated element

160350, 160351, 160377, F24F 700

Patent

active

047700866

ABSTRACT:
Ventilation safety apparatus for extending toward a mine face from a supported area includes a collapsible frame supported on the mine floor, the supports for the frame being connected by a beam, and arms extending upwardly when in released position to support a brattice curtain extending from floor to roof of the mine passage. The arms are foldable to lie substantially parallel to the connecting beam for transporting the apparatus. The device is pushed outward beyond the fixed brattice curtain to extend the workable area ahead of the supported mine roof.

REFERENCES:
patent: 1180124 (1916-04-01), Foedisch
patent: 2186510 (1940-01-01), Walter et al.
patent: 2621725 (1952-12-01), Shacikoski
patent: 3118363 (1964-01-01), Burgess, Jr.
patent: 4139101 (1979-02-01), Towfigh
patent: 4282802 (1981-08-01), Divers et al.
patent: 4708189 (1987-11-01), Ward

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