Means to seal-off portions of underground mines and the like

Details Means to seal-off portions of underground mines and the like Means to seal-off portions of underground mines and the like

1975-04-17

1977-05-17

Shapiro, Jacob

49 34, 52 2, 98 50, E21F 114

Patent

active

040233723

ABSTRACT:
An apparatus for sealably closing off or separating portions of a mine for safety or other reasons including an inflatable member having a size and shape which corresponds substantially to the cross-sectional size and shape of a mine passage, tunnel or the like to be closed off, a device for attaching the inflatable member to the ceiling of the mine passage, said inflatable member having an inflatable peripheral portion with a closure wall or web portion extending across the space defined by the inflatable portion, a source of compressed gas and means connecting said source to the inflatable portion of the member, said source including a valve with an actuator operable to open the valve so that gas from the gas source can pass into the inflatable member when the inflatable member is suspended from the ceiling of the mine passage, and a slide fastener located in the web portion of the member and movable between a first position in which an opening is formed in the web portion for passage therethrough and a second position in which the web portion is closed to separate the portions of the mine passage on opposite sides thereof from each other.

REFERENCES:
patent: 1478303 (1923-12-01), Snyder
patent: 1766324 (1930-06-01), Berner
patent: 2391871 (1946-01-01), Benson
patent: 2395689 (1946-02-01), Sembower, Jr.
patent: 2621725 (1952-12-01), Shacikoski
patent: 2826337 (1958-03-01), Ford et al.
patent: 3682225 (1972-08-01), Redden
patent: 3781933 (1974-01-01), Soter

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